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This is the bulk of GPIO changes for the v3.18 development

Browse Source 
cycle:
 
 - Increase the default ARCH_NR_GPIO from 256 to 512. This
   was done to avoid having a custom <asm/gpio.h> header for
   the x86 architecture - GPIO is custom and complicated
   enough as it is already! We want to move to a radix to
   store the descriptors going forward, and finally get rid
   of this fixed array size altogether.
 
 - Endgame patching of the gpio_remove() semantics initiated
   by Abdoulaye Berthe. It is not accepted by the system that
   the removal of a GPIO chip fails during e.g. reboot or
   shutdown, and therefore the return value has now painfully
   been refactored away. For special cases like GPIO expanders
   on a hot-pluggable bus like USB, we may later add some
   gpiochip_try_remove() call, but for the cases we have now,
   return values are moot.
 
 - Some incremental refactoring of the gpiolib core and ACPI
   GPIO library for more descriptor usage.
 
 - Refactor the chained IRQ handler set-up method to handle
   also threaded, nested interrupts and set up the parent IRQ
   correctly. Switch STMPE and TC3589x drivers to use this
   registration method.
 
 - Add a .irq_not_threaded flag to the struct gpio_chip, so
   that also GPIO expanders that block but are still not
   using threaded IRQ handlers.
 
 - New drivers for the ARM64 X-Gene SoC GPIO controller.
 
 - The syscon GPIO driver has been improved to handle the
   "DSP GPIO" found on the TI Keystone 2 SoC:s.
 
 - ADNP driver switched to use gpiolib irqchip helpers.
 
 - Refactor the DWAPB driver to support being instantiated
   from and MFD cell (platform device).
 
 - Incremental feature improvement in the Zynq, MCP23S08,
   DWAPB, OMAP, Xilinx and Crystalcove drivers.
 
 - Various minor fixes.
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Merge tag 'gpio-v3.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO changes from Linus Walleij:
 "This is the bulk of GPIO changes for the v3.18 development cycle:

   - Increase the default ARCH_NR_GPIO from 256 to 512.  This was done
     to avoid having a custom <asm/gpio.h> header for the x86
     architecture - GPIO is custom and complicated enough as it is
     already! We want to move to a radix to store the descriptors going
     forward, and finally get rid of this fixed array size altogether.

   - Endgame patching of the gpio_remove() semantics initiated by
     Abdoulaye Berthe.  It is not accepted by the system that the
     removal of a GPIO chip fails during eg reboot or shutdown, and
     therefore the return value has now painfully been refactored away.
     For special cases like GPIO expanders on a hot-pluggable bus like
     USB, we may later add some gpiochip_try_remove() call, but for the
     cases we have now, return values are moot.

   - Some incremental refactoring of the gpiolib core and ACPI GPIO
     library for more descriptor usage.

   - Refactor the chained IRQ handler set-up method to handle also
     threaded, nested interrupts and set up the parent IRQ correctly.
     Switch STMPE and TC3589x drivers to use this registration method.

   - Add a .irq_not_threaded flag to the struct gpio_chip, so that also
     GPIO expanders that block but are still not using threaded IRQ
     handlers.

   - New drivers for the ARM64 X-Gene SoC GPIO controller.

   - The syscon GPIO driver has been improved to handle the "DSP GPIO"
     found on the TI Keystone 2 SoC:s.

   - ADNP driver switched to use gpiolib irqchip helpers.

   - Refactor the DWAPB driver to support being instantiated from and
     MFD cell (platform device).

   - Incremental feature improvement in the Zynq, MCP23S08, DWAPB, OMAP,
     Xilinx and Crystalcove drivers.

   - Various minor fixes"

* tag 'gpio-v3.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (52 commits)
  gpio: pch: Build context save/restore only for PM
  pinctrl: abx500: get rid of unused variable
  gpio: ks8695: fix 'else should follow close brace '}''
  gpio: stmpe: add verbose debug code
  gpio: stmpe: fix up interrupt enable logic
  gpio: staticize xway_stp_init()
  gpio: handle also nested irqchips in the chained handler set-up
  gpio: set parent irq on chained handlers
  gpiolib: irqchip: use irq_find_mapping while removing irqchip
  gpio: crystalcove: support virtual GPIO
  pinctrl: bcm281xx: make Kconfig dependency more strict
  gpio: kona: enable only on BCM_MOBILE or for compile testing
  gpio, bcm-kona, LLVMLinux: Remove use of __initconst
  gpio: Fix ngpio in gpio-xilinx driver
  gpio: dwapb: fix pointer to integer cast
  gpio: xgene: Remove unneeded #ifdef CONFIG_OF guard
  gpio: xgene: Remove unneeded forward declation for struct xgene_gpio
  gpio: xgene: Fix missing spin_lock_init()
  gpio: ks8695: fix switch case indentation
  gpiolib: add irq_not_threaded flag to gpio_chip
  ...
This commit is contained in:
Linus Torvalds 2014-10-09 14:58:15 -04:00
commit ea584595fc
65 changed files with 1297 additions and 659 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
Documentation/devicetree/bindings/gpio/gpio-dsp-keystone.txt Normal file
View File

@ -0,0 +1,39 @@
Keystone 2 DSP GPIO controller bindings
HOST OS userland running on ARM can send interrupts to DSP cores using
the DSP GPIO controller IP. It provides 28 IRQ signals per each DSP core.
This is one of the component used by the IPC mechanism used on Keystone SOCs.
For example TCI6638K2K SoC has 8 DSP GPIO controllers:
- 8 for C66x CorePacx CPUs 0-7
Keystone 2 DSP GPIO controller has specific features:
- each GPIO can be configured only as output pin;
- setting GPIO value to 1 causes IRQ generation on target DSP core;
- reading pin value returns 0 - if IRQ was handled or 1 - IRQ is still
pending.
Required Properties:
- compatible: should be "ti,keystone-dsp-gpio"
- ti,syscon-dev: phandle/offset pair. The phandle to syscon used to
access device state control registers and the offset of device's specific
registers within device state control registers range.
- gpio-controller: Marks the device node as a gpio controller.
- #gpio-cells: Should be 2.
Please refer to gpio.txt in this directory for details of the common GPIO
bindings used by client devices.
Example:
dspgpio0: keystone_dsp_gpio@02620240 {
compatible = "ti,keystone-dsp-gpio";
ti,syscon-dev = <&devctrl 0x240>;
gpio-controller;
#gpio-cells = <2>;
};
dsp0: dsp0 {
compatible = "linux,rproc-user";
...
kick-gpio = <&dspgpio0 27>;
};

39
Documentation/devicetree/bindings/gpio/gpio-pca953x.txt Normal file
View File

@ -0,0 +1,39 @@
* NXP PCA953x I2C GPIO multiplexer
Required properties:
- compatible: Has to contain one of the following:
nxp,pca9505
nxp,pca9534
nxp,pca9535
nxp,pca9536
nxp,pca9537
nxp,pca9538
nxp,pca9539
nxp,pca9554
nxp,pca9555
nxp,pca9556
nxp,pca9557
nxp,pca9574
nxp,pca9575
nxp,pca9698
maxim,max7310
maxim,max7312
maxim,max7313
maxim,max7315
ti,pca6107
ti,tca6408
ti,tca6416
ti,tca6424
exar,xra1202
Example:
gpio@20 {
compatible = "nxp,pca9505";
reg = <0x20>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_pca9505>;
interrupt-parent = <&gpio3>;
interrupts = <23 IRQ_TYPE_LEVEL_LOW>;
};

22
Documentation/devicetree/bindings/gpio/gpio-xgene.txt Normal file
View File

@ -0,0 +1,22 @@
APM X-Gene SoC GPIO controller bindings
This is a gpio controller that is part of the flash controller.
This gpio controller controls a total of 48 gpios.
Required properties:
- compatible: "apm,xgene-gpio" for X-Gene GPIO controller
- reg: Physical base address and size of the controller's registers
- #gpio-cells: Should be two.
- first cell is the pin number
- second cell is used to specify the gpio polarity:
0 = active high
1 = active low
- gpio-controller: Marks the device node as a GPIO controller.
Example:
gpio0: gpio0@1701c000 {
compatible = "apm,xgene-gpio";
reg = <0x0 0x1701c000 0x0 0x40>;
gpio-controller;
#gpio-cells = <2>;
};

15
Documentation/devicetree/bindings/gpio/mrvl-gpio.txt
View File

@ -19,7 +19,7 @@ Required properties:
- gpio-controller : Marks the device node as a gpio controller.
- #gpio-cells : Should be one. It is the pin number.
Example:
Example for a MMP platform:
gpio: gpio@d4019000 {
compatible = "marvell,mmp-gpio";
@ -32,6 +32,19 @@ Example:
#interrupt-cells = <1>;
};
Example for a PXA3xx platform:
gpio: gpio@40e00000 {
compatible = "intel,pxa3xx-gpio";
reg = <0x40e00000 0x10000>;
interrupt-names = "gpio0", "gpio1", "gpio_mux";
interrupts = <8 9 10>;
gpio-controller;
#gpio-cells = <0x2>;
interrupt-controller;
#interrupt-cells = <0x2>;
};
* Marvell Orion GPIO Controller
Required properties:

6
Documentation/gpio/driver.txt
View File

@ -124,7 +124,8 @@ symbol:
* gpiochip_set_chained_irqchip(): sets up a chained irq handler for a
gpio_chip from a parent IRQ and passes the struct gpio_chip* as handler
data. (Notice handler data, since the irqchip data is likely used by the
parent irqchip!) This is for the chained type of chip.
parent irqchip!) This is for the chained type of chip. This is also used
to set up a nested irqchip if NULL is passed as handler.
To use the helpers please keep the following in mind:
@ -178,7 +179,8 @@ does not help since it pins the module to the kernel forever (it calls
try_module_get()). A GPIO driver can use the following functions instead
to request and free descriptors without being pinned to the kernel forever.
int gpiochip_request_own_desc(struct gpio_desc *desc, const char *label)
struct gpio_desc *gpiochip_request_own_desc(struct gpio_desc *desc,
const char *label)
void gpiochip_free_own_desc(struct gpio_desc *desc)

10
arch/arm/common/scoop.c
View File

@ -243,18 +243,12 @@ err_ioremap:
static int scoop_remove(struct platform_device *pdev)
{
struct scoop_dev *sdev = platform_get_drvdata(pdev);
int ret;
if (!sdev)
return -EINVAL;
if (sdev->gpio.base != -1) {
ret = gpiochip_remove(&sdev->gpio);
if (ret) {
dev_err(&pdev->dev, "Can't remove gpio chip: %d\n", ret);
return ret;
}
}
if (sdev->gpio.base != -1)
gpiochip_remove(&sdev->gpio);
platform_set_drvdata(pdev, NULL);
iounmap(sdev->base);

4
arch/mips/txx9/generic/setup.c
View File

@ -789,11 +789,11 @@ void __init txx9_iocled_init(unsigned long baseaddr,
if (platform_device_add(pdev))
goto out_pdev;
return;
out_pdev:
platform_device_put(pdev);
out_gpio:
if (gpiochip_remove(&iocled->chip))
return;
gpiochip_remove(&iocled->chip);
out_unmap:
iounmap(iocled->mmioaddr);
out_free:

3
arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c
View File

@ -141,7 +141,8 @@ static int mcu_gpiochip_add(struct mcu *mcu)
static int mcu_gpiochip_remove(struct mcu *mcu)
{
return gpiochip_remove(&mcu->gc);
gpiochip_remove(&mcu->gc);
return 0;
}
static int mcu_probe(struct i2c_client *client, const struct i2c_device_id *id)

6
arch/sh/boards/mach-x3proto/gpio.c
View File

@ -128,10 +128,8 @@ int __init x3proto_gpio_setup(void)
return 0;
err_irq:
ret = gpiochip_remove(&x3proto_gpio_chip);
if (unlikely(ret))
pr_err("Failed deregistering GPIO\n");
gpiochip_remove(&x3proto_gpio_chip);
ret = 0;
err_gpio:
synchronize_irq(ilsel);

3
drivers/bcma/driver_gpio.c
View File

@ -255,5 +255,6 @@ int bcma_gpio_init(struct bcma_drv_cc *cc)
int bcma_gpio_unregister(struct bcma_drv_cc *cc)
{
bcma_gpio_irq_domain_exit(cc);
return gpiochip_remove(&cc->gpio);
gpiochip_remove(&cc->gpio);
return 0;
}

14
drivers/gpio/Kconfig
View File

@ -136,7 +136,6 @@ config GPIO_DWAPB
tristate "Synopsys DesignWare APB GPIO driver"
select GPIO_GENERIC
select GENERIC_IRQ_CHIP
depends on OF_GPIO
help
Say Y or M here to build support for the Synopsys DesignWare APB
GPIO block.
@ -334,6 +333,15 @@ config GPIO_TZ1090_PDC
help
Say yes here to support Toumaz Xenif TZ1090 PDC GPIOs.
config GPIO_XGENE
bool "APM X-Gene GPIO controller support"
depends on ARM64 && OF_GPIO
help
This driver is to support the GPIO block within the APM X-Gene SoC
platform's generic flash controller. The GPIO pins are muxed with
the generic flash controller's address and data pins. Say yes
here to enable the GFC GPIO functionality.
config GPIO_XILINX
bool "Xilinx GPIO support"
depends on PPC_OF || MICROBLAZE || ARCH_ZYNQ
@ -681,6 +689,7 @@ config GPIO_ADP5588_IRQ
config GPIO_ADNP
tristate "Avionic Design N-bit GPIO expander"
depends on I2C && OF_GPIO
select GPIOLIB_IRQCHIP
help
This option enables support for N GPIOs found on Avionic Design
I2C GPIO expanders. The register space will be extended by powers
@ -796,7 +805,6 @@ config GPIO_MAX7301
config GPIO_MCP23S08
tristate "Microchip MCP23xxx I/O expander"
depends on OF_GPIO
depends on (SPI_MASTER && !I2C) || I2C
help
SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
@ -880,7 +888,7 @@ config GPIO_MSIC
config GPIO_BCM_KONA
bool "Broadcom Kona GPIO"
depends on OF_GPIO
depends on OF_GPIO && (ARCH_BCM_MOBILE || COMPILE_TEST)
help
Turn on GPIO support for Broadcom "Kona" chips.

1
drivers/gpio/Makefile
View File

@ -101,6 +101,7 @@ obj-$(CONFIG_GPIO_VX855) += gpio-vx855.o
obj-$(CONFIG_GPIO_WM831X) += gpio-wm831x.o
obj-$(CONFIG_GPIO_WM8350) += gpio-wm8350.o
obj-$(CONFIG_GPIO_WM8994) += gpio-wm8994.o
obj-$(CONFIG_GPIO_XGENE) += gpio-xgene.o
obj-$(CONFIG_GPIO_XILINX) += gpio-xilinx.o
obj-$(CONFIG_GPIO_XTENSA) += gpio-xtensa.o
obj-$(CONFIG_GPIO_ZEVIO) += gpio-zevio.o

155
drivers/gpio/gpio-adnp.c
View File

@ -6,10 +6,9 @@
* published by the Free Software Foundation.
*/
#include <linux/gpio.h>
#include <linux/gpio/driver.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/irqdomain.h>
#include <linux/module.h>
#include <linux/of_irq.h>
#include <linux/seq_file.h>
@ -27,8 +26,6 @@ struct adnp {
unsigned int reg_shift;
struct mutex i2c_lock;
struct irq_domain *domain;
struct mutex irq_lock;
u8 *irq_enable;
@ -253,6 +250,7 @@ static void adnp_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
static int adnp_gpio_setup(struct adnp *adnp, unsigned int num_gpios)
{
struct gpio_chip *chip = &adnp->gpio;
int err;
adnp->reg_shift = get_count_order(num_gpios) - 3;
@ -272,6 +270,10 @@ static int adnp_gpio_setup(struct adnp *adnp, unsigned int num_gpios)
chip->of_node = chip->dev->of_node;
chip->owner = THIS_MODULE;
err = gpiochip_add(chip);
if (err)
return err;
return 0;
}
@ -326,7 +328,8 @@ static irqreturn_t adnp_irq(int irq, void *data)
for_each_set_bit(bit, &pending, 8) {
unsigned int child_irq;
child_irq = irq_find_mapping(adnp->domain, base + bit);
child_irq = irq_find_mapping(adnp->gpio.irqdomain,
base + bit);
handle_nested_irq(child_irq);
}
}
@ -334,35 +337,32 @@ static irqreturn_t adnp_irq(int irq, void *data)
return IRQ_HANDLED;
}
static int adnp_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
static void adnp_irq_mask(struct irq_data *d)
{
struct adnp *adnp = to_adnp(chip);
return irq_create_mapping(adnp->domain, offset);
}
static void adnp_irq_mask(struct irq_data *data)
{
struct adnp *adnp = irq_data_get_irq_chip_data(data);
unsigned int reg = data->hwirq >> adnp->reg_shift;
unsigned int pos = data->hwirq & 7;
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct adnp *adnp = to_adnp(gc);
unsigned int reg = d->hwirq >> adnp->reg_shift;
unsigned int pos = d->hwirq & 7;
adnp->irq_enable[reg] &= ~BIT(pos);
}
static void adnp_irq_unmask(struct irq_data *data)
static void adnp_irq_unmask(struct irq_data *d)
{
struct adnp *adnp = irq_data_get_irq_chip_data(data);
unsigned int reg = data->hwirq >> adnp->reg_shift;
unsigned int pos = data->hwirq & 7;
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct adnp *adnp = to_adnp(gc);
unsigned int reg = d->hwirq >> adnp->reg_shift;
unsigned int pos = d->hwirq & 7;
adnp->irq_enable[reg] |= BIT(pos);
}
static int adnp_irq_set_type(struct irq_data *data, unsigned int type)
static int adnp_irq_set_type(struct irq_data *d, unsigned int type)
{
struct adnp *adnp = irq_data_get_irq_chip_data(data);
unsigned int reg = data->hwirq >> adnp->reg_shift;
unsigned int pos = data->hwirq & 7;
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct adnp *adnp = to_adnp(gc);
unsigned int reg = d->hwirq >> adnp->reg_shift;
unsigned int pos = d->hwirq & 7;
if (type & IRQ_TYPE_EDGE_RISING)
adnp->irq_rise[reg] |= BIT(pos);
@ -387,16 +387,18 @@ static int adnp_irq_set_type(struct irq_data *data, unsigned int type)
return 0;
}
static void adnp_irq_bus_lock(struct irq_data *data)
static void adnp_irq_bus_lock(struct irq_data *d)
{
struct adnp *adnp = irq_data_get_irq_chip_data(data);
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct adnp *adnp = to_adnp(gc);
mutex_lock(&adnp->irq_lock);
}
static void adnp_irq_bus_unlock(struct irq_data *data)
static void adnp_irq_bus_unlock(struct irq_data *d)
{
struct adnp *adnp = irq_data_get_irq_chip_data(data);
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct adnp *adnp = to_adnp(gc);
unsigned int num_regs = 1 << adnp->reg_shift, i;
mutex_lock(&adnp->i2c_lock);
@ -408,26 +410,6 @@ static void adnp_irq_bus_unlock(struct irq_data *data)
mutex_unlock(&adnp->irq_lock);
}
static int adnp_irq_reqres(struct irq_data *data)
{
struct adnp *adnp = irq_data_get_irq_chip_data(data);
if (gpio_lock_as_irq(&adnp->gpio, data->hwirq)) {
dev_err(adnp->gpio.dev,
"unable to lock HW IRQ %lu for IRQ\n",
data->hwirq);
return -EINVAL;
}
return 0;
}
static void adnp_irq_relres(struct irq_data *data)
{
struct adnp *adnp = irq_data_get_irq_chip_data(data);
gpio_unlock_as_irq(&adnp->gpio, data->hwirq);
}
static struct irq_chip adnp_irq_chip = {
.name = "gpio-adnp",
.irq_mask = adnp_irq_mask,
@ -435,29 +417,6 @@ static struct irq_chip adnp_irq_chip = {
.irq_set_type = adnp_irq_set_type,
.irq_bus_lock = adnp_irq_bus_lock,
.irq_bus_sync_unlock = adnp_irq_bus_unlock,
.irq_request_resources = adnp_irq_reqres,
.irq_release_resources = adnp_irq_relres,
};
static int adnp_irq_map(struct irq_domain *domain, unsigned int irq,
irq_hw_number_t hwirq)
{
irq_set_chip_data(irq, domain->host_data);
irq_set_chip(irq, &adnp_irq_chip);
irq_set_nested_thread(irq, true);
#ifdef CONFIG_ARM
set_irq_flags(irq, IRQF_VALID);
#else
irq_set_noprobe(irq);
#endif
return 0;
}
static const struct irq_domain_ops adnp_irq_domain_ops = {
.map = adnp_irq_map,
.xlate = irq_domain_xlate_twocell,
};
static int adnp_irq_setup(struct adnp *adnp)
@ -503,35 +462,28 @@ static int adnp_irq_setup(struct adnp *adnp)
adnp->irq_enable[i] = 0x00;
}
adnp->domain = irq_domain_add_linear(chip->of_node, chip->ngpio,
&adnp_irq_domain_ops, adnp);
err = request_threaded_irq(adnp->client->irq, NULL, adnp_irq,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
dev_name(chip->dev), adnp);
err = devm_request_threaded_irq(chip->dev, adnp->client->irq,
NULL, adnp_irq,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
dev_name(chip->dev), adnp);
if (err != 0) {
dev_err(chip->dev, "can't request IRQ#%d: %d\n",
adnp->client->irq, err);
return err;
}
chip->to_irq = adnp_gpio_to_irq;
return 0;
}
static void adnp_irq_teardown(struct adnp *adnp)
{
unsigned int irq, i;
free_irq(adnp->client->irq, adnp);
for (i = 0; i < adnp->gpio.ngpio; i++) {
irq = irq_find_mapping(adnp->domain, i);
if (irq > 0)
irq_dispose_mapping(irq);
err = gpiochip_irqchip_add(chip,
&adnp_irq_chip,
0,
handle_simple_irq,
IRQ_TYPE_NONE);
if (err) {
dev_err(chip->dev,
"could not connect irqchip to gpiochip\n");
return err;
}
irq_domain_remove(adnp->domain);
return 0;
}
static int adnp_i2c_probe(struct i2c_client *client,
@ -558,38 +510,25 @@ static int adnp_i2c_probe(struct i2c_client *client,
adnp->client = client;
err = adnp_gpio_setup(adnp, num_gpios);
if (err < 0)
if (err)
return err;
if (of_find_property(np, "interrupt-controller", NULL)) {
err = adnp_irq_setup(adnp);
if (err < 0)
goto teardown;
if (err)
return err;
}
err = gpiochip_add(&adnp->gpio);
if (err < 0)
goto teardown;
i2c_set_clientdata(client, adnp);
return 0;
teardown:
if (of_find_property(np, "interrupt-controller", NULL))
adnp_irq_teardown(adnp);
return err;
}
static int adnp_i2c_remove(struct i2c_client *client)
{
struct adnp *adnp = i2c_get_clientdata(client);
struct device_node *np = client->dev.of_node;
gpiochip_remove(&adnp->gpio);
if (of_find_property(np, "interrupt-controller", NULL))
adnp_irq_teardown(adnp);
return 0;
}

2
drivers/gpio/gpio-bcm-kona.c
View File

@ -496,7 +496,7 @@ static struct irq_chip bcm_gpio_irq_chip = {
.irq_release_resources = bcm_kona_gpio_irq_relres,
};
static struct __initconst of_device_id bcm_kona_gpio_of_match[] = {
static struct of_device_id const bcm_kona_gpio_of_match[] = {
{ .compatible = "brcm,kona-gpio" },
{}
};

28
drivers/gpio/gpio-crystalcove.c
View File

@ -24,6 +24,7 @@
#include <linux/mfd/intel_soc_pmic.h>
#define CRYSTALCOVE_GPIO_NUM 16
#define CRYSTALCOVE_VGPIO_NUM 94
#define UPDATE_IRQ_TYPE BIT(0)
#define UPDATE_IRQ_MASK BIT(1)
@ -130,6 +131,9 @@ static int crystalcove_gpio_dir_in(struct gpio_chip *chip, unsigned gpio)
{
struct crystalcove_gpio *cg = to_cg(chip);
if (gpio > CRYSTALCOVE_VGPIO_NUM)
return 0;
return regmap_write(cg->regmap, to_reg(gpio, CTRL_OUT),
CTLO_INPUT_SET);
}
@ -139,6 +143,9 @@ static int crystalcove_gpio_dir_out(struct gpio_chip *chip, unsigned gpio,
{
struct crystalcove_gpio *cg = to_cg(chip);
if (gpio > CRYSTALCOVE_VGPIO_NUM)
return 0;
return regmap_write(cg->regmap, to_reg(gpio, CTRL_OUT),
CTLO_OUTPUT_SET | value);
}
@ -149,6 +156,9 @@ static int crystalcove_gpio_get(struct gpio_chip *chip, unsigned gpio)
int ret;
unsigned int val;
if (gpio > CRYSTALCOVE_VGPIO_NUM)
return 0;
ret = regmap_read(cg->regmap, to_reg(gpio, CTRL_IN), &val);
if (ret)
return ret;
@ -161,6 +171,9 @@ static void crystalcove_gpio_set(struct gpio_chip *chip,
{
struct crystalcove_gpio *cg = to_cg(chip);
if (gpio > CRYSTALCOVE_VGPIO_NUM)
return;
if (value)
regmap_update_bits(cg->regmap, to_reg(gpio, CTRL_OUT), 1, 1);
else
@ -256,7 +269,7 @@ static irqreturn_t crystalcove_gpio_irq_handler(int irq, void *data)
pending = p0 | p1 << 8;
for (gpio = 0; gpio < cg->chip.ngpio; gpio++) {
for (gpio = 0; gpio < CRYSTALCOVE_GPIO_NUM; gpio++) {
if (pending & BIT(gpio)) {
virq = irq_find_mapping(cg->chip.irqdomain, gpio);
generic_handle_irq(virq);
@ -273,7 +286,7 @@ static void crystalcove_gpio_dbg_show(struct seq_file *s,
int gpio, offset;
unsigned int ctlo, ctli, mirqs0, mirqsx, irq;
for (gpio = 0; gpio < cg->chip.ngpio; gpio++) {
for (gpio = 0; gpio < CRYSTALCOVE_GPIO_NUM; gpio++) {
regmap_read(cg->regmap, to_reg(gpio, CTRL_OUT), &ctlo);
regmap_read(cg->regmap, to_reg(gpio, CTRL_IN), &ctli);
regmap_read(cg->regmap, gpio < 8 ? MGPIO0IRQS0 : MGPIO1IRQS0,
@ -320,7 +333,7 @@ static int crystalcove_gpio_probe(struct platform_device *pdev)
cg->chip.get = crystalcove_gpio_get;
cg->chip.set = crystalcove_gpio_set;
cg->chip.base = -1;
cg->chip.ngpio = CRYSTALCOVE_GPIO_NUM;
cg->chip.ngpio = CRYSTALCOVE_VGPIO_NUM;
cg->chip.can_sleep = true;
cg->chip.dev = dev;
cg->chip.dbg_show = crystalcove_gpio_dbg_show;
@ -346,7 +359,7 @@ static int crystalcove_gpio_probe(struct platform_device *pdev)
return 0;
out_remove_gpio:
WARN_ON(gpiochip_remove(&cg->chip));
gpiochip_remove(&cg->chip);
return retval;
}
@ -354,14 +367,11 @@ static int crystalcove_gpio_remove(struct platform_device *pdev)
{
struct crystalcove_gpio *cg = platform_get_drvdata(pdev);
int irq = platform_get_irq(pdev, 0);
int err;
err = gpiochip_remove(&cg->chip);
gpiochip_remove(&cg->chip);
if (irq >= 0)
free_irq(irq, cg);
return err;
return 0;
}
static struct platform_driver crystalcove_gpio_driver = {

9
drivers/gpio/gpio-cs5535.c
View File

@ -201,7 +201,8 @@ EXPORT_SYMBOL_GPL(cs5535_gpio_setup_event);
static int chip_gpio_request(struct gpio_chip *c, unsigned offset)
{
struct cs5535_gpio_chip *chip = (struct cs5535_gpio_chip *) c;
struct cs5535_gpio_chip *chip =
container_of(c, struct cs5535_gpio_chip, chip);
unsigned long flags;
spin_lock_irqsave(&chip->lock, flags);
@ -241,7 +242,8 @@ static void chip_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
static int chip_direction_input(struct gpio_chip *c, unsigned offset)
{
struct cs5535_gpio_chip *chip = (struct cs5535_gpio_chip *) c;
struct cs5535_gpio_chip *chip =
container_of(c, struct cs5535_gpio_chip, chip);
unsigned long flags;
spin_lock_irqsave(&chip->lock, flags);
@ -254,7 +256,8 @@ static int chip_direction_input(struct gpio_chip *c, unsigned offset)
static int chip_direction_output(struct gpio_chip *c, unsigned offset, int val)
{
struct cs5535_gpio_chip *chip = (struct cs5535_gpio_chip *) c;
struct cs5535_gpio_chip *chip =
container_of(c, struct cs5535_gpio_chip, chip);
unsigned long flags;
spin_lock_irqsave(&chip->lock, flags);

410
drivers/gpio/gpio-dwapb.c
View File

@ -21,6 +21,8 @@
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/platform_data/gpio-dwapb.h>
#include <linux/slab.h>
#define GPIO_SWPORTA_DR 0x00
#define GPIO_SWPORTA_DDR 0x04
@ -35,6 +37,7 @@
#define GPIO_INTTYPE_LEVEL 0x38
#define GPIO_INT_POLARITY 0x3c
#define GPIO_INTSTATUS 0x40
#define GPIO_PORTA_DEBOUNCE 0x48
#define GPIO_PORTA_EOI 0x4c
#define GPIO_EXT_PORTA 0x50
#define GPIO_EXT_PORTB 0x54
@ -48,10 +51,28 @@
struct dwapb_gpio;
#ifdef CONFIG_PM_SLEEP
/* Store GPIO context across system-wide suspend/resume transitions */
struct dwapb_context {
u32 data;
u32 dir;
u32 ext;
u32 int_en;
u32 int_mask;
u32 int_type;
u32 int_pol;
u32 int_deb;
};
#endif
struct dwapb_gpio_port {
struct bgpio_chip bgc;
bool is_registered;
struct dwapb_gpio *gpio;
#ifdef CONFIG_PM_SLEEP
struct dwapb_context *ctx;
#endif
unsigned int idx;
};
struct dwapb_gpio {
@ -62,11 +83,33 @@ struct dwapb_gpio {
struct irq_domain *domain;
};
static inline struct dwapb_gpio_port *
to_dwapb_gpio_port(struct bgpio_chip *bgc)
{
return container_of(bgc, struct dwapb_gpio_port, bgc);
}
static inline u32 dwapb_read(struct dwapb_gpio *gpio, unsigned int offset)
{
struct bgpio_chip *bgc = &gpio->ports[0].bgc;
void __iomem *reg_base = gpio->regs;
return bgc->read_reg(reg_base + offset);
}
static inline void dwapb_write(struct dwapb_gpio *gpio, unsigned int offset,
u32 val)
{
struct bgpio_chip *bgc = &gpio->ports[0].bgc;
void __iomem *reg_base = gpio->regs;
bgc->write_reg(reg_base + offset, val);
}
static int dwapb_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
{
struct bgpio_chip *bgc = to_bgpio_chip(gc);
struct dwapb_gpio_port *port = container_of(bgc, struct
dwapb_gpio_port, bgc);
struct dwapb_gpio_port *port = to_dwapb_gpio_port(bgc);
struct dwapb_gpio *gpio = port->gpio;
return irq_find_mapping(gpio->domain, offset);
@ -74,21 +117,20 @@ static int dwapb_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
static void dwapb_toggle_trigger(struct dwapb_gpio *gpio, unsigned int offs)
{
u32 v = readl(gpio->regs + GPIO_INT_POLARITY);
u32 v = dwapb_read(gpio, GPIO_INT_POLARITY);
if (gpio_get_value(gpio->ports[0].bgc.gc.base + offs))
v &= ~BIT(offs);
else
v |= BIT(offs);
writel(v, gpio->regs + GPIO_INT_POLARITY);
dwapb_write(gpio, GPIO_INT_POLARITY, v);
}
static void dwapb_irq_handler(u32 irq, struct irq_desc *desc)
static u32 dwapb_do_irq(struct dwapb_gpio *gpio)
{
struct dwapb_gpio *gpio = irq_get_handler_data(irq);
struct irq_chip *chip = irq_desc_get_chip(desc);
u32 irq_status = readl_relaxed(gpio->regs + GPIO_INTSTATUS);
u32 ret = irq_status;
while (irq_status) {
int hwirq = fls(irq_status) - 1;
@ -102,6 +144,16 @@ static void dwapb_irq_handler(u32 irq, struct irq_desc *desc)
dwapb_toggle_trigger(gpio, hwirq);
}
return ret;
}
static void dwapb_irq_handler(u32 irq, struct irq_desc *desc)
{
struct dwapb_gpio *gpio = irq_get_handler_data(irq);
struct irq_chip *chip = irq_desc_get_chip(desc);
dwapb_do_irq(gpio);
if (chip->irq_eoi)
chip->irq_eoi(irq_desc_get_irq_data(desc));
}
@ -115,9 +167,9 @@ static void dwapb_irq_enable(struct irq_data *d)
u32 val;
spin_lock_irqsave(&bgc->lock, flags);
val = readl(gpio->regs + GPIO_INTEN);
val = dwapb_read(gpio, GPIO_INTEN);
val |= BIT(d->hwirq);
writel(val, gpio->regs + GPIO_INTEN);
dwapb_write(gpio, GPIO_INTEN, val);
spin_unlock_irqrestore(&bgc->lock, flags);
}
@ -130,9 +182,9 @@ static void dwapb_irq_disable(struct irq_data *d)
u32 val;
spin_lock_irqsave(&bgc->lock, flags);
val = readl(gpio->regs + GPIO_INTEN);
val = dwapb_read(gpio, GPIO_INTEN);
val &= ~BIT(d->hwirq);
writel(val, gpio->regs + GPIO_INTEN);
dwapb_write(gpio, GPIO_INTEN, val);
spin_unlock_irqrestore(&bgc->lock, flags);
}
@ -172,8 +224,8 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type)
return -EINVAL;
spin_lock_irqsave(&bgc->lock, flags);
level = readl(gpio->regs + GPIO_INTTYPE_LEVEL);
polarity = readl(gpio->regs + GPIO_INT_POLARITY);
level = dwapb_read(gpio, GPIO_INTTYPE_LEVEL);
polarity = dwapb_read(gpio, GPIO_INT_POLARITY);
switch (type) {
case IRQ_TYPE_EDGE_BOTH:
@ -200,29 +252,55 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type)
irq_setup_alt_chip(d, type);
writel(level, gpio->regs + GPIO_INTTYPE_LEVEL);
writel(polarity, gpio->regs + GPIO_INT_POLARITY);
dwapb_write(gpio, GPIO_INTTYPE_LEVEL, level);
dwapb_write(gpio, GPIO_INT_POLARITY, polarity);
spin_unlock_irqrestore(&bgc->lock, flags);
return 0;
}
static int dwapb_gpio_set_debounce(struct gpio_chip *gc,
unsigned offset, unsigned debounce)
{
struct bgpio_chip *bgc = to_bgpio_chip(gc);
struct dwapb_gpio_port *port = to_dwapb_gpio_port(bgc);
struct dwapb_gpio *gpio = port->gpio;
unsigned long flags, val_deb;
unsigned long mask = bgc->pin2mask(bgc, offset);
spin_lock_irqsave(&bgc->lock, flags);
val_deb = dwapb_read(gpio, GPIO_PORTA_DEBOUNCE);
if (debounce)
dwapb_write(gpio, GPIO_PORTA_DEBOUNCE, val_deb | mask);
else
dwapb_write(gpio, GPIO_PORTA_DEBOUNCE, val_deb & ~mask);
spin_unlock_irqrestore(&bgc->lock, flags);
return 0;
}
static irqreturn_t dwapb_irq_handler_mfd(int irq, void *dev_id)
{
u32 worked;
struct dwapb_gpio *gpio = dev_id;
worked = dwapb_do_irq(gpio);
return worked ? IRQ_HANDLED : IRQ_NONE;
}
static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
struct dwapb_gpio_port *port)
struct dwapb_gpio_port *port,
struct dwapb_port_property *pp)
{
struct gpio_chip *gc = &port->bgc.gc;
struct device_node *node = gc->of_node;
struct irq_chip_generic *irq_gc;
struct device_node *node = pp->node;
struct irq_chip_generic *irq_gc = NULL;
unsigned int hwirq, ngpio = gc->ngpio;
struct irq_chip_type *ct;
int err, irq, i;
irq = irq_of_parse_and_map(node, 0);
if (!irq) {
dev_warn(gpio->dev, "no irq for bank %s\n",
port->bgc.gc.of_node->full_name);
return;
}
int err, i;
gpio->domain = irq_domain_add_linear(node, ngpio,
&irq_generic_chip_ops, gpio);
@ -269,8 +347,24 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
irq_gc->chip_types[1].type = IRQ_TYPE_EDGE_BOTH;
irq_gc->chip_types[1].handler = handle_edge_irq;
irq_set_chained_handler(irq, dwapb_irq_handler);
irq_set_handler_data(irq, gpio);
if (!pp->irq_shared) {
irq_set_chained_handler(pp->irq, dwapb_irq_handler);
irq_set_handler_data(pp->irq, gpio);
} else {
/*
* Request a shared IRQ since where MFD would have devices
* using the same irq pin
*/
err = devm_request_irq(gpio->dev, pp->irq,
dwapb_irq_handler_mfd,
IRQF_SHARED, "gpio-dwapb-mfd", gpio);
if (err) {
dev_err(gpio->dev, "error requesting IRQ\n");
irq_domain_remove(gpio->domain);
gpio->domain = NULL;
return;
}
}
for (hwirq = 0 ; hwirq < ngpio ; hwirq++)
irq_create_mapping(gpio->domain, hwirq);
@ -296,57 +390,53 @@ static void dwapb_irq_teardown(struct dwapb_gpio *gpio)
}
static int dwapb_gpio_add_port(struct dwapb_gpio *gpio,
struct device_node *port_np,
struct dwapb_port_property *pp,
unsigned int offs)
{
struct dwapb_gpio_port *port;
u32 port_idx, ngpio;
void __iomem *dat, *set, *dirout;
int err;
if (of_property_read_u32(port_np, "reg", &port_idx) ||
port_idx >= DWAPB_MAX_PORTS) {
dev_err(gpio->dev, "missing/invalid port index for %s\n",
port_np->full_name);
return -EINVAL;
}
port = &gpio->ports[offs];
port->gpio = gpio;
port->idx = pp->idx;
if (of_property_read_u32(port_np, "snps,nr-gpios", &ngpio)) {
dev_info(gpio->dev, "failed to get number of gpios for %s\n",
port_np->full_name);
ngpio = 32;
}
#ifdef CONFIG_PM_SLEEP
port->ctx = devm_kzalloc(gpio->dev, sizeof(*port->ctx), GFP_KERNEL);
if (!port->ctx)
return -ENOMEM;
#endif
dat = gpio->regs + GPIO_EXT_PORTA + (port_idx * GPIO_EXT_PORT_SIZE);
set = gpio->regs + GPIO_SWPORTA_DR + (port_idx * GPIO_SWPORT_DR_SIZE);
dat = gpio->regs + GPIO_EXT_PORTA + (pp->idx * GPIO_EXT_PORT_SIZE);
set = gpio->regs + GPIO_SWPORTA_DR + (pp->idx * GPIO_SWPORT_DR_SIZE);
dirout = gpio->regs + GPIO_SWPORTA_DDR +
(port_idx * GPIO_SWPORT_DDR_SIZE);
(pp->idx * GPIO_SWPORT_DDR_SIZE);
err = bgpio_init(&port->bgc, gpio->dev, 4, dat, set, NULL, dirout,
NULL, false);
if (err) {
dev_err(gpio->dev, "failed to init gpio chip for %s\n",
port_np->full_name);
pp->name);
return err;
}
port->bgc.gc.ngpio = ngpio;
port->bgc.gc.of_node = port_np;
#ifdef CONFIG_OF_GPIO
port->bgc.gc.of_node = pp->node;
#endif
port->bgc.gc.ngpio = pp->ngpio;
port->bgc.gc.base = pp->gpio_base;
/*
* Only port A can provide interrupts in all configurations of the IP.
*/
if (port_idx == 0 &&
of_property_read_bool(port_np, "interrupt-controller"))
dwapb_configure_irqs(gpio, port);
/* Only port A support debounce */
if (pp->idx == 0)
port->bgc.gc.set_debounce = dwapb_gpio_set_debounce;
if (pp->irq)
dwapb_configure_irqs(gpio, port, pp);
err = gpiochip_add(&port->bgc.gc);
if (err)
dev_err(gpio->dev, "failed to register gpiochip for %s\n",
port_np->full_name);
pp->name);
else
port->is_registered = true;
@ -362,25 +452,116 @@ static void dwapb_gpio_unregister(struct dwapb_gpio *gpio)
gpiochip_remove(&gpio->ports[m].bgc.gc);
}
static struct dwapb_platform_data *
dwapb_gpio_get_pdata_of(struct device *dev)
{
struct device_node *node, *port_np;
struct dwapb_platform_data *pdata;
struct dwapb_port_property *pp;
int nports;
int i;
node = dev->of_node;
if (!IS_ENABLED(CONFIG_OF_GPIO) || !node)
return ERR_PTR(-ENODEV);
nports = of_get_child_count(node);
if (nports == 0)
return ERR_PTR(-ENODEV);
pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
pdata->properties = kcalloc(nports, sizeof(*pp), GFP_KERNEL);
if (!pdata->properties) {
kfree(pdata);
return ERR_PTR(-ENOMEM);
}
pdata->nports = nports;
i = 0;
for_each_child_of_node(node, port_np) {
pp = &pdata->properties[i++];
pp->node = port_np;
if (of_property_read_u32(port_np, "reg", &pp->idx) ||
pp->idx >= DWAPB_MAX_PORTS) {
dev_err(dev, "missing/invalid port index for %s\n",
port_np->full_name);
kfree(pdata->properties);
kfree(pdata);
return ERR_PTR(-EINVAL);
}
if (of_property_read_u32(port_np, "snps,nr-gpios",
&pp->ngpio)) {
dev_info(dev, "failed to get number of gpios for %s\n",
port_np->full_name);
pp->ngpio = 32;
}
/*
* Only port A can provide interrupts in all configurations of
* the IP.
*/
if (pp->idx == 0 &&
of_property_read_bool(port_np, "interrupt-controller")) {
pp->irq = irq_of_parse_and_map(port_np, 0);
if (!pp->irq) {
dev_warn(dev, "no irq for bank %s\n",
port_np->full_name);
}
}
pp->irq_shared = false;
pp->gpio_base = -1;
pp->name = port_np->full_name;
}
return pdata;
}
static inline void dwapb_free_pdata_of(struct dwapb_platform_data *pdata)
{
if (!IS_ENABLED(CONFIG_OF_GPIO) || !pdata)
return;
kfree(pdata->properties);
kfree(pdata);
}
static int dwapb_gpio_probe(struct platform_device *pdev)
{
unsigned int i;
struct resource *res;
struct dwapb_gpio *gpio;
struct device_node *np;
int err;
unsigned int offs = 0;
struct device *dev = &pdev->dev;
struct dwapb_platform_data *pdata = dev_get_platdata(dev);
bool is_pdata_alloc = !pdata;
gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
if (!gpio)
return -ENOMEM;
gpio->dev = &pdev->dev;
if (is_pdata_alloc) {
pdata = dwapb_gpio_get_pdata_of(dev);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
}
gpio->nr_ports = of_get_child_count(pdev->dev.of_node);
if (!gpio->nr_ports) {
err = -EINVAL;
if (!pdata->nports) {
err = -ENODEV;
goto out_err;
}
gpio->ports = devm_kzalloc(&pdev->dev, gpio->nr_ports *
gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
if (!gpio) {
err = -ENOMEM;
goto out_err;
}
gpio->dev = &pdev->dev;
gpio->nr_ports = pdata->nports;
gpio->ports = devm_kcalloc(&pdev->dev, gpio->nr_ports,
sizeof(*gpio->ports), GFP_KERNEL);
if (!gpio->ports) {
err = -ENOMEM;
@ -394,20 +575,23 @@ static int dwapb_gpio_probe(struct platform_device *pdev)
goto out_err;
}
for_each_child_of_node(pdev->dev.of_node, np) {
err = dwapb_gpio_add_port(gpio, np, offs++);
for (i = 0; i < gpio->nr_ports; i++) {
err = dwapb_gpio_add_port(gpio, &pdata->properties[i], i);
if (err)
goto out_unregister;
}
platform_set_drvdata(pdev, gpio);
return 0;
goto out_err;
out_unregister:
dwapb_gpio_unregister(gpio);
dwapb_irq_teardown(gpio);
out_err:
if (is_pdata_alloc)
dwapb_free_pdata_of(pdata);
return err;
}
@ -427,10 +611,100 @@ static const struct of_device_id dwapb_of_match[] = {
};
MODULE_DEVICE_TABLE(of, dwapb_of_match);
#ifdef CONFIG_PM_SLEEP
static int dwapb_gpio_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct dwapb_gpio *gpio = platform_get_drvdata(pdev);
struct bgpio_chip *bgc = &gpio->ports[0].bgc;
unsigned long flags;
int i;
spin_lock_irqsave(&bgc->lock, flags);
for (i = 0; i < gpio->nr_ports; i++) {
unsigned int offset;
unsigned int idx = gpio->ports[i].idx;
struct dwapb_context *ctx = gpio->ports[i].ctx;
BUG_ON(!ctx);
offset = GPIO_SWPORTA_DDR + idx * GPIO_SWPORT_DDR_SIZE;
ctx->dir = dwapb_read(gpio, offset);
offset = GPIO_SWPORTA_DR + idx * GPIO_SWPORT_DR_SIZE;
ctx->data = dwapb_read(gpio, offset);
offset = GPIO_EXT_PORTA + idx * GPIO_EXT_PORT_SIZE;
ctx->ext = dwapb_read(gpio, offset);
/* Only port A can provide interrupts */
if (idx == 0) {
ctx->int_mask = dwapb_read(gpio, GPIO_INTMASK);
ctx->int_en = dwapb_read(gpio, GPIO_INTEN);
ctx->int_pol = dwapb_read(gpio, GPIO_INT_POLARITY);
ctx->int_type = dwapb_read(gpio, GPIO_INTTYPE_LEVEL);
ctx->int_deb = dwapb_read(gpio, GPIO_PORTA_DEBOUNCE);
/* Mask out interrupts */
dwapb_write(gpio, GPIO_INTMASK, 0xffffffff);
}
}
spin_unlock_irqrestore(&bgc->lock, flags);
return 0;
}
static int dwapb_gpio_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct dwapb_gpio *gpio = platform_get_drvdata(pdev);
struct bgpio_chip *bgc = &gpio->ports[0].bgc;
unsigned long flags;
int i;
spin_lock_irqsave(&bgc->lock, flags);
for (i = 0; i < gpio->nr_ports; i++) {
unsigned int offset;
unsigned int idx = gpio->ports[i].idx;
struct dwapb_context *ctx = gpio->ports[i].ctx;
BUG_ON(!ctx);
offset = GPIO_SWPORTA_DR + idx * GPIO_SWPORT_DR_SIZE;
dwapb_write(gpio, offset, ctx->data);
offset = GPIO_SWPORTA_DDR + idx * GPIO_SWPORT_DDR_SIZE;
dwapb_write(gpio, offset, ctx->dir);
offset = GPIO_EXT_PORTA + idx * GPIO_EXT_PORT_SIZE;
dwapb_write(gpio, offset, ctx->ext);
/* Only port A can provide interrupts */
if (idx == 0) {
dwapb_write(gpio, GPIO_INTTYPE_LEVEL, ctx->int_type);
dwapb_write(gpio, GPIO_INT_POLARITY, ctx->int_pol);
dwapb_write(gpio, GPIO_PORTA_DEBOUNCE, ctx->int_deb);
dwapb_write(gpio, GPIO_INTEN, ctx->int_en);
dwapb_write(gpio, GPIO_INTMASK, ctx->int_mask);
/* Clear out spurious interrupts */
dwapb_write(gpio, GPIO_PORTA_EOI, 0xffffffff);
}
}
spin_unlock_irqrestore(&bgc->lock, flags);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(dwapb_gpio_pm_ops, dwapb_gpio_suspend,
dwapb_gpio_resume);
static struct platform_driver dwapb_gpio_driver = {
.driver = {
.name = "gpio-dwapb",
.owner = THIS_MODULE,
.pm = &dwapb_gpio_pm_ops,
.of_match_table = of_match_ptr(dwapb_of_match),
},
.probe = dwapb_gpio_probe,

30
drivers/gpio/gpio-ks8695.c
View File

@ -265,29 +265,27 @@ static int ks8695_gpio_show(struct seq_file *s, void *unused)
seq_printf(s, "EXT%i ", i);
switch ((ctrl & intmask[i]) >> (4 * i)) {
case IOPC_TM_LOW:
seq_printf(s, "(Low)"); break;
case IOPC_TM_HIGH:
seq_printf(s, "(High)"); break;
case IOPC_TM_RISING:
seq_printf(s, "(Rising)"); break;
case IOPC_TM_FALLING:
seq_printf(s, "(Falling)"); break;
case IOPC_TM_EDGE:
seq_printf(s, "(Edges)"); break;
case IOPC_TM_LOW:
seq_printf(s, "(Low)"); break;
case IOPC_TM_HIGH:
seq_printf(s, "(High)"); break;
case IOPC_TM_RISING:
seq_printf(s, "(Rising)"); break;
case IOPC_TM_FALLING:
seq_printf(s, "(Falling)"); break;
case IOPC_TM_EDGE:
seq_printf(s, "(Edges)"); break;
}
}
else
} else
seq_printf(s, "GPIO\t");
}
else if (i <= KS8695_GPIO_5) {
} else if (i <= KS8695_GPIO_5) {
if (ctrl & enable[i])
seq_printf(s, "TOUT%i\t", i - KS8695_GPIO_4);
else
seq_printf(s, "GPIO\t");
}
else
} else {
seq_printf(s, "GPIO\t");
}
seq_printf(s, "\t");

64
drivers/gpio/gpio-mcp23s08.c
View File

@ -479,7 +479,7 @@ static int mcp23s08_irq_setup(struct mcp23s08 *mcp)
mutex_init(&mcp->irq_lock);
mcp->irq_domain = irq_domain_add_linear(chip->of_node, chip->ngpio,
mcp->irq_domain = irq_domain_add_linear(chip->dev->of_node, chip->ngpio,
&irq_domain_simple_ops, mcp);
if (!mcp->irq_domain)
return -ENODEV;
@ -581,7 +581,7 @@ done:
static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
void *data, unsigned addr, unsigned type,
unsigned base, unsigned pullups)
struct mcp23s08_platform_data *pdata, int cs)
{
int status;
bool mirror = false;
@ -635,7 +635,7 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
return -EINVAL;
}
mcp->chip.base = base;
mcp->chip.base = pdata->base;
mcp->chip.can_sleep = true;
mcp->chip.dev = dev;
mcp->chip.owner = THIS_MODULE;
@ -648,11 +648,9 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
if (status < 0)
goto fail;
mcp->irq_controller = of_property_read_bool(mcp->chip.of_node,
"interrupt-controller");
mcp->irq_controller = pdata->irq_controller;
if (mcp->irq && mcp->irq_controller && (type == MCP_TYPE_017))
mirror = of_property_read_bool(mcp->chip.of_node,
"microchip,irq-mirror");
mirror = pdata->mirror;
if ((status & IOCON_SEQOP) || !(status & IOCON_HAEN) || mirror) {
/* mcp23s17 has IOCON twice, make sure they are in sync */
@ -668,7 +666,7 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
}
/* configure ~100K pullups */
status = mcp->ops->write(mcp, MCP_GPPU, pullups);
status = mcp->ops->write(mcp, MCP_GPPU, pdata->chip[cs].pullups);
if (status < 0)
goto fail;
@ -768,25 +766,29 @@ MODULE_DEVICE_TABLE(of, mcp23s08_i2c_of_match);
static int mcp230xx_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct mcp23s08_platform_data *pdata;
struct mcp23s08_platform_data *pdata, local_pdata;
struct mcp23s08 *mcp;
int status, base, pullups;
int status;
const struct of_device_id *match;
match = of_match_device(of_match_ptr(mcp23s08_i2c_of_match),
&client->dev);
pdata = dev_get_platdata(&client->dev);
if (match || !pdata) {
base = -1;
pullups = 0;
if (match) {
pdata = &local_pdata;
pdata->base = -1;
pdata->chip[0].pullups = 0;
pdata->irq_controller = of_property_read_bool(
client->dev.of_node,
"interrupt-controller");
pdata->mirror = of_property_read_bool(client->dev.of_node,
"microchip,irq-mirror");
client->irq = irq_of_parse_and_map(client->dev.of_node, 0);
} else {
if (!gpio_is_valid(pdata->base)) {
pdata = dev_get_platdata(&client->dev);
if (!pdata || !gpio_is_valid(pdata->base)) {
dev_dbg(&client->dev, "invalid platform data\n");
return -EINVAL;
}
base = pdata->base;
pullups = pdata->chip[0].pullups;
}
mcp = kzalloc(sizeof(*mcp), GFP_KERNEL);
@ -795,7 +797,7 @@ static int mcp230xx_probe(struct i2c_client *client,
mcp->irq = client->irq;
status = mcp23s08_probe_one(mcp, &client->dev, client, client->addr,
id->driver_data, base, pullups);
id->driver_data, pdata, 0);
if (status)
goto fail;
@ -863,14 +865,12 @@ static void mcp23s08_i2c_exit(void) { }
static int mcp23s08_probe(struct spi_device *spi)
{
struct mcp23s08_platform_data *pdata;
struct mcp23s08_platform_data *pdata, local_pdata;
unsigned addr;
int chips = 0;
struct mcp23s08_driver_data *data;
int status, type;
unsigned base = -1,
ngpio = 0,
pullups[ARRAY_SIZE(pdata->chip)];
unsigned ngpio = 0;
const struct of_device_id *match;
u32 spi_present_mask = 0;
@ -893,11 +893,18 @@ static int mcp23s08_probe(struct spi_device *spi)
return -ENODEV;
}
pdata = &local_pdata;
pdata->base = -1;
for (addr = 0; addr < ARRAY_SIZE(pdata->chip); addr++) {
pullups[addr] = 0;
pdata->chip[addr].pullups = 0;
if (spi_present_mask & (1 << addr))
chips++;
}
pdata->irq_controller = of_property_read_bool(
spi->dev.of_node,
"interrupt-controller");
pdata->mirror = of_property_read_bool(spi->dev.of_node,
"microchip,irq-mirror");
} else {
type = spi_get_device_id(spi)->driver_data;
pdata = dev_get_platdata(&spi->dev);
@ -917,10 +924,7 @@ static int mcp23s08_probe(struct spi_device *spi)
return -EINVAL;
}
spi_present_mask |= 1 << addr;
pullups[addr] = pdata->chip[addr].pullups;
}
base = pdata->base;
}
if (!chips)
@ -938,13 +942,13 @@ static int mcp23s08_probe(struct spi_device *spi)
chips--;
data->mcp[addr] = &data->chip[chips];
status = mcp23s08_probe_one(data->mcp[addr], &spi->dev, spi,
0x40 | (addr << 1), type, base,
pullups[addr]);
0x40 | (addr << 1), type, pdata,
addr);
if (status < 0)
goto fail;
if (base != -1)
base += (type == MCP_TYPE_S17) ? 16 : 8;
if (pdata->base != -1)
pdata->base += (type == MCP_TYPE_S17) ? 16 : 8;
ngpio += (type == MCP_TYPE_S17) ? 16 : 8;
}
data->ngpio = ngpio;

33
drivers/gpio/gpio-omap.c
View File

@ -857,16 +857,6 @@ static void omap_gpio_unmask_irq(struct irq_data *d)
spin_unlock_irqrestore(&bank->lock, flags);
}
static struct irq_chip gpio_irq_chip = {
.name = "GPIO",
.irq_shutdown = omap_gpio_irq_shutdown,
.irq_ack = omap_gpio_ack_irq,
.irq_mask = omap_gpio_mask_irq,
.irq_unmask = omap_gpio_unmask_irq,
.irq_set_type = omap_gpio_irq_type,
.irq_set_wake = omap_gpio_wake_enable,
};
/*---------------------------------------------------------------------*/
static int omap_mpuio_suspend_noirq(struct device *dev)
@ -1088,7 +1078,7 @@ omap_mpuio_alloc_gc(struct gpio_bank *bank, unsigned int irq_start,
IRQ_NOREQUEST | IRQ_NOPROBE, 0);
}
static int omap_gpio_chip_init(struct gpio_bank *bank)
static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
{
int j;
static int gpio;
@ -1137,17 +1127,17 @@ static int omap_gpio_chip_init(struct gpio_bank *bank)
}
#endif
ret = gpiochip_irqchip_add(&bank->chip, &gpio_irq_chip,
ret = gpiochip_irqchip_add(&bank->chip, irqc,
irq_base, omap_gpio_irq_handler,
IRQ_TYPE_NONE);
if (ret) {
dev_err(bank->dev, "Couldn't add irqchip to gpiochip %d\n", ret);
ret = gpiochip_remove(&bank->chip);
gpiochip_remove(&bank->chip);
return -ENODEV;
}
gpiochip_set_chained_irqchip(&bank->chip, &gpio_irq_chip,
gpiochip_set_chained_irqchip(&bank->chip, irqc,
bank->irq, omap_gpio_irq_handler);
for (j = 0; j < bank->width; j++) {
@ -1172,6 +1162,7 @@ static int omap_gpio_probe(struct platform_device *pdev)
const struct omap_gpio_platform_data *pdata;
struct resource *res;
struct gpio_bank *bank;
struct irq_chip *irqc;
int ret;
match = of_match_device(of_match_ptr(omap_gpio_match), dev);
@ -1186,6 +1177,18 @@ static int omap_gpio_probe(struct platform_device *pdev)
return -ENOMEM;
}
irqc = devm_kzalloc(dev, sizeof(*irqc), GFP_KERNEL);
if (!irqc)
return -ENOMEM;
irqc->irq_shutdown = omap_gpio_irq_shutdown,
irqc->irq_ack = omap_gpio_ack_irq,
irqc->irq_mask = omap_gpio_mask_irq,
irqc->irq_unmask = omap_gpio_unmask_irq,
irqc->irq_set_type = omap_gpio_irq_type,
irqc->irq_set_wake = omap_gpio_wake_enable,
irqc->name = dev_name(&pdev->dev);
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (unlikely(!res)) {
dev_err(dev, "Invalid IRQ resource\n");
@ -1241,7 +1244,7 @@ static int omap_gpio_probe(struct platform_device *pdev)
omap_gpio_mod_init(bank);
ret = omap_gpio_chip_init(bank);
ret = omap_gpio_chip_init(bank, irqc);
if (ret)
return ret;

54
drivers/gpio/gpio-pca953x.c
View File

@ -520,7 +520,7 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
struct i2c_client *client = chip->client;
int ret, i, offset = 0;
if (irq_base != -1
if (client->irq && irq_base != -1
&& (id->driver_data & PCA_INT)) {
switch (chip->chip_type) {
@ -586,50 +586,6 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
}
#endif
/*
* Handlers for alternative sources of platform_data
*/
#ifdef CONFIG_OF_GPIO
/*
* Translate OpenFirmware node properties into platform_data
* WARNING: This is DEPRECATED and will be removed eventually!
*/
static void
pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, u32 *invert)
{
struct device_node *node;
const __be32 *val;
int size;
*gpio_base = -1;
node = client->dev.of_node;
if (node == NULL)
return;
val = of_get_property(node, "linux,gpio-base", &size);
WARN(val, "%s: device-tree property 'linux,gpio-base' is deprecated!", __func__);
if (val) {
if (size != sizeof(*val))
dev_warn(&client->dev, "%s: wrong linux,gpio-base\n",
node->full_name);
else
*gpio_base = be32_to_cpup(val);
}
val = of_get_property(node, "polarity", NULL);
WARN(val, "%s: device-tree property 'polarity' is deprecated!", __func__);
if (val)
*invert = *val;
}
#else
static void
pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, u32 *invert)
{
*gpio_base = -1;
}
#endif
static int device_pca953x_init(struct pca953x_chip *chip, u32 invert)
{
int ret;
@ -704,12 +660,8 @@ static int pca953x_probe(struct i2c_client *client,
invert = pdata->invert;
chip->names = pdata->names;
} else {
pca953x_get_alt_pdata(client, &chip->gpio_start, &invert);
#ifdef CONFIG_OF_GPIO
/* If I2C node has no interrupts property, disable GPIO interrupts */
if (of_find_property(client->dev.of_node, "interrupts", NULL) == NULL)
irq_base = -1;
#endif
chip->gpio_start = -1;
irq_base = 0;
}
chip->client = client;

2
drivers/gpio/gpio-pch.c
View File

@ -171,6 +171,7 @@ static int pch_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)
return 0;
}
#ifdef CONFIG_PM
/*
* Save register configuration and disable interrupts.
*/
@ -206,6 +207,7 @@ static void pch_gpio_restore_reg_conf(struct pch_gpio *chip)
iowrite32(chip->pch_gpio_reg.gpio_use_sel_reg,
&chip->reg->gpio_use_sel);
}
#endif
static int pch_gpio_to_irq(struct gpio_chip *gpio, unsigned offset)
{

50
drivers/gpio/gpio-samsung.c
View File

@ -1309,56 +1309,6 @@ samsung_gpio_pull_t s3c_gpio_getpull(unsigned int pin)
}
EXPORT_SYMBOL(s3c_gpio_getpull);
#ifdef CONFIG_S5P_GPIO_DRVSTR
s5p_gpio_drvstr_t s5p_gpio_get_drvstr(unsigned int pin)
{
struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin);
unsigned int off;
void __iomem *reg;
int shift;
u32 drvstr;
if (!chip)
return -EINVAL;
off = pin - chip->chip.base;
shift = off * 2;
reg = chip->base + 0x0C;
drvstr = __raw_readl(reg);
drvstr = drvstr >> shift;
drvstr &= 0x3;
return (__force s5p_gpio_drvstr_t)drvstr;
}
EXPORT_SYMBOL(s5p_gpio_get_drvstr);
int s5p_gpio_set_drvstr(unsigned int pin, s5p_gpio_drvstr_t drvstr)
{
struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin);
unsigned int off;
void __iomem *reg;
int shift;
u32 tmp;
if (!chip)
return -EINVAL;
off = pin - chip->chip.base;
shift = off * 2;
reg = chip->base + 0x0C;
tmp = __raw_readl(reg);
tmp &= ~(0x3 << shift);
tmp |= drvstr << shift;
__raw_writel(tmp, reg);
return 0;
}
EXPORT_SYMBOL(s5p_gpio_set_drvstr);
#endif /* CONFIG_S5P_GPIO_DRVSTR */
#ifdef CONFIG_PLAT_S3C24XX
unsigned int s3c2410_modify_misccr(unsigned int clear, unsigned int change)
{

99
drivers/gpio/gpio-stmpe.c
View File

@ -13,6 +13,7 @@
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/mfd/stmpe.h>
#include <linux/seq_file.h>
/*
* These registers are modified under the irq bus lock and cached to avoid
@ -127,19 +128,19 @@ static int stmpe_gpio_irq_set_type(struct irq_data *d, unsigned int type)
int regoffset = offset / 8;
int mask = 1 << (offset % 8);
if (type == IRQ_TYPE_LEVEL_LOW || type == IRQ_TYPE_LEVEL_HIGH)
if (type & IRQ_TYPE_LEVEL_LOW || type & IRQ_TYPE_LEVEL_HIGH)
return -EINVAL;
/* STMPE801 doesn't have RE and FE registers */
if (stmpe_gpio->stmpe->partnum == STMPE801)
return 0;
if (type == IRQ_TYPE_EDGE_RISING)
if (type & IRQ_TYPE_EDGE_RISING)
stmpe_gpio->regs[REG_RE][regoffset] |= mask;
else
stmpe_gpio->regs[REG_RE][regoffset] &= ~mask;
if (type == IRQ_TYPE_EDGE_FALLING)
if (type & IRQ_TYPE_EDGE_FALLING)
stmpe_gpio->regs[REG_FE][regoffset] |= mask;
else
stmpe_gpio->regs[REG_FE][regoffset] &= ~mask;
@ -211,6 +212,77 @@ static void stmpe_gpio_irq_unmask(struct irq_data *d)
stmpe_gpio->regs[REG_IE][regoffset] |= mask;
}
static void stmpe_dbg_show_one(struct seq_file *s,
struct gpio_chip *gc,
unsigned offset, unsigned gpio)
{
struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(gc);
struct stmpe *stmpe = stmpe_gpio->stmpe;
const char *label = gpiochip_is_requested(gc, offset);
int num_banks = DIV_ROUND_UP(stmpe->num_gpios, 8);
bool val = !!stmpe_gpio_get(gc, offset);
u8 dir_reg = stmpe->regs[STMPE_IDX_GPDR_LSB] - (offset / 8);
u8 mask = 1 << (offset % 8);
int ret;
u8 dir;
ret = stmpe_reg_read(stmpe, dir_reg);
if (ret < 0)
return;
dir = !!(ret & mask);
if (dir) {
seq_printf(s, " gpio-%-3d (%-20.20s) out %s",
gpio, label ?: "(none)",
val ? "hi" : "lo");
} else {
u8 edge_det_reg = stmpe->regs[STMPE_IDX_GPEDR_MSB] + num_banks - 1 - (offset / 8);
u8 rise_reg = stmpe->regs[STMPE_IDX_GPRER_LSB] - (offset / 8);
u8 fall_reg = stmpe->regs[STMPE_IDX_GPFER_LSB] - (offset / 8);
u8 irqen_reg = stmpe->regs[STMPE_IDX_IEGPIOR_LSB] - (offset / 8);
bool edge_det;
bool rise;
bool fall;
bool irqen;
ret = stmpe_reg_read(stmpe, edge_det_reg);
if (ret < 0)
return;
edge_det = !!(ret & mask);
ret = stmpe_reg_read(stmpe, rise_reg);
if (ret < 0)
return;
rise = !!(ret & mask);
ret = stmpe_reg_read(stmpe, fall_reg);
if (ret < 0)
return;
fall = !!(ret & mask);
ret = stmpe_reg_read(stmpe, irqen_reg);
if (ret < 0)
return;
irqen = !!(ret & mask);
seq_printf(s, " gpio-%-3d (%-20.20s) in %s %s %s%s%s",
gpio, label ?: "(none)",
val ? "hi" : "lo",
edge_det ? "edge-asserted" : "edge-inactive",
irqen ? "IRQ-enabled" : "",
rise ? " rising-edge-detection" : "",
fall ? " falling-edge-detection" : "");
}
}
static void stmpe_dbg_show(struct seq_file *s, struct gpio_chip *gc)
{
unsigned i;
unsigned gpio = gc->base;
for (i = 0; i < gc->ngpio; i++, gpio++) {
stmpe_dbg_show_one(s, gc, i, gpio);
seq_printf(s, "\n");
}
}
static struct irq_chip stmpe_gpio_irq_chip = {
.name = "stmpe-gpio",
.irq_bus_lock = stmpe_gpio_irq_lock,
@ -293,6 +365,9 @@ static int stmpe_gpio_probe(struct platform_device *pdev)
#endif
stmpe_gpio->chip.base = -1;
if (IS_ENABLED(CONFIG_DEBUG_FS))
stmpe_gpio->chip.dbg_show = stmpe_dbg_show;
if (pdata)
stmpe_gpio->norequest_mask = pdata->norequest_mask;
else if (np)
@ -308,6 +383,12 @@ static int stmpe_gpio_probe(struct platform_device *pdev)
if (ret)
goto out_free;
ret = gpiochip_add(&stmpe_gpio->chip);
if (ret) {
dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret);
goto out_disable;
}
if (irq > 0) {
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
stmpe_gpio_irq, IRQF_ONESHOT,
@ -324,14 +405,13 @@ static int stmpe_gpio_probe(struct platform_device *pdev)
if (ret) {
dev_err(&pdev->dev,
"could not connect irqchip to gpiochip\n");
return ret;
goto out_disable;
}
}
ret = gpiochip_add(&stmpe_gpio->chip);
if (ret) {
dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret);
goto out_disable;
gpiochip_set_chained_irqchip(&stmpe_gpio->chip,
&stmpe_gpio_irq_chip,
irq,
NULL);
}
if (pdata && pdata->setup)
@ -343,6 +423,7 @@ static int stmpe_gpio_probe(struct platform_device *pdev)
out_disable:
stmpe_disable(stmpe, STMPE_BLOCK_GPIO);
gpiochip_remove(&stmpe_gpio->chip);
out_free:
kfree(stmpe_gpio);
return ret;

2
drivers/gpio/gpio-stp-xway.c
View File

@ -292,7 +292,7 @@ static struct platform_driver xway_stp_driver = {
},
};
int __init xway_stp_init(void)
static int __init xway_stp_init(void)
{
return platform_driver_register(&xway_stp_driver);
}

94
drivers/gpio/gpio-syscon.c
View File

@ -37,6 +37,8 @@
* dat_bit_offset: Offset (in bits) to the first GPIO bit.
* dir_bit_offset: Optional offset (in bits) to the first bit to switch
* GPIO direction (Used with GPIO_SYSCON_FEAT_DIR flag).
* set: HW specific callback to assigns output value
* for signal "offset"
*/
struct syscon_gpio_data {
@ -45,12 +47,16 @@ struct syscon_gpio_data {
unsigned int bit_count;
unsigned int dat_bit_offset;
unsigned int dir_bit_offset;
void (*set)(struct gpio_chip *chip,
unsigned offset, int value);
};
struct syscon_gpio_priv {
struct gpio_chip chip;
struct regmap *syscon;
const struct syscon_gpio_data *data;
u32 dreg_offset;
u32 dir_reg_offset;
};
static inline struct syscon_gpio_priv *to_syscon_gpio(struct gpio_chip *chip)
@ -61,9 +67,11 @@ static inline struct syscon_gpio_priv *to_syscon_gpio(struct gpio_chip *chip)
static int syscon_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct syscon_gpio_priv *priv = to_syscon_gpio(chip);
unsigned int val, offs = priv->data->dat_bit_offset + offset;
unsigned int val, offs;
int ret;
offs = priv->dreg_offset + priv->data->dat_bit_offset + offset;
ret = regmap_read(priv->syscon,
(offs / SYSCON_REG_BITS) * SYSCON_REG_SIZE, &val);
if (ret)
@ -75,7 +83,9 @@ static int syscon_gpio_get(struct gpio_chip *chip, unsigned offset)
static void syscon_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
{
struct syscon_gpio_priv *priv = to_syscon_gpio(chip);
unsigned int offs = priv->data->dat_bit_offset + offset;
unsigned int offs;
offs = priv->dreg_offset + priv->data->dat_bit_offset + offset;
regmap_update_bits(priv->syscon,
(offs / SYSCON_REG_BITS) * SYSCON_REG_SIZE,
@ -88,7 +98,10 @@ static int syscon_gpio_dir_in(struct gpio_chip *chip, unsigned offset)
struct syscon_gpio_priv *priv = to_syscon_gpio(chip);
if (priv->data->flags & GPIO_SYSCON_FEAT_DIR) {
unsigned int offs = priv->data->dir_bit_offset + offset;
unsigned int offs;
offs = priv->dir_reg_offset +
priv->data->dir_bit_offset + offset;
regmap_update_bits(priv->syscon,
(offs / SYSCON_REG_BITS) * SYSCON_REG_SIZE,
@ -103,7 +116,10 @@ static int syscon_gpio_dir_out(struct gpio_chip *chip, unsigned offset, int val)
struct syscon_gpio_priv *priv = to_syscon_gpio(chip);
if (priv->data->flags & GPIO_SYSCON_FEAT_DIR) {
unsigned int offs = priv->data->dir_bit_offset + offset;
unsigned int offs;
offs = priv->dir_reg_offset +
priv->data->dir_bit_offset + offset;
regmap_update_bits(priv->syscon,
(offs / SYSCON_REG_BITS) * SYSCON_REG_SIZE,
@ -111,7 +127,7 @@ static int syscon_gpio_dir_out(struct gpio_chip *chip, unsigned offset, int val)
BIT(offs % SYSCON_REG_BITS));
}
syscon_gpio_set(chip, offset, val);
priv->data->set(chip, offset, val);
return 0;
}
@ -124,11 +140,46 @@ static const struct syscon_gpio_data clps711x_mctrl_gpio = {
.dat_bit_offset = 0x40 * 8 + 8,
};
#define KEYSTONE_LOCK_BIT BIT(0)
static void keystone_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
{
struct syscon_gpio_priv *priv = to_syscon_gpio(chip);
unsigned int offs;
int ret;
offs = priv->dreg_offset + priv->data->dat_bit_offset + offset;
if (!val)
return;
ret = regmap_update_bits(
priv->syscon,
(offs / SYSCON_REG_BITS) * SYSCON_REG_SIZE,
BIT(offs % SYSCON_REG_BITS) | KEYSTONE_LOCK_BIT,
BIT(offs % SYSCON_REG_BITS) | KEYSTONE_LOCK_BIT);
if (ret < 0)
dev_err(chip->dev, "gpio write failed ret(%d)\n", ret);
}
static const struct syscon_gpio_data keystone_dsp_gpio = {
/* ARM Keystone 2 */
.compatible = NULL,
.flags = GPIO_SYSCON_FEAT_OUT,
.bit_count = 28,
.dat_bit_offset = 4,
.set = keystone_gpio_set,
};
static const struct of_device_id syscon_gpio_ids[] = {
{
.compatible = "cirrus,clps711x-mctrl-gpio",
.data = &clps711x_mctrl_gpio,
},
{
.compatible = "ti,keystone-dsp-gpio",
.data = &keystone_dsp_gpio,
},
{ }
};
MODULE_DEVICE_TABLE(of, syscon_gpio_ids);
@ -138,6 +189,8 @@ static int syscon_gpio_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
const struct of_device_id *of_id = of_match_device(syscon_gpio_ids, dev);
struct syscon_gpio_priv *priv;
struct device_node *np = dev->of_node;
int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
@ -145,10 +198,31 @@ static int syscon_gpio_probe(struct platform_device *pdev)
priv->data = of_id->data;
priv->syscon =
syscon_regmap_lookup_by_compatible(priv->data->compatible);
if (IS_ERR(priv->syscon))
return PTR_ERR(priv->syscon);
if (priv->data->compatible) {
priv->syscon = syscon_regmap_lookup_by_compatible(
priv->data->compatible);
if (IS_ERR(priv->syscon))
return PTR_ERR(priv->syscon);
} else {
priv->syscon =
syscon_regmap_lookup_by_phandle(np, "gpio,syscon-dev");
if (IS_ERR(priv->syscon))
return PTR_ERR(priv->syscon);
ret = of_property_read_u32_index(np, "gpio,syscon-dev", 1,
&priv->dreg_offset);
if (ret)
dev_err(dev, "can't read the data register offset!\n");
priv->dreg_offset <<= 3;
ret = of_property_read_u32_index(np, "gpio,syscon-dev", 2,
&priv->dir_reg_offset);
if (ret)
dev_err(dev, "can't read the dir register offset!\n");
priv->dir_reg_offset <<= 3;
}
priv->chip.dev = dev;
priv->chip.owner = THIS_MODULE;
@ -159,7 +233,7 @@ static int syscon_gpio_probe(struct platform_device *pdev)
if (priv->data->flags & GPIO_SYSCON_FEAT_IN)
priv->chip.direction_input = syscon_gpio_dir_in;
if (priv->data->flags & GPIO_SYSCON_FEAT_OUT) {
priv->chip.set = syscon_gpio_set;
priv->chip.set = priv->data->set ? : syscon_gpio_set;
priv->chip.direction_output = syscon_gpio_dir_out;
}

5
drivers/gpio/gpio-tc3589x.c
View File

@ -300,6 +300,11 @@ static int tc3589x_gpio_probe(struct platform_device *pdev)
return ret;
}
gpiochip_set_chained_irqchip(&tc3589x_gpio->chip,
&tc3589x_gpio_irq_chip,
irq,
NULL);
if (pdata && pdata->setup)
pdata->setup(tc3589x, tc3589x_gpio->chip.base);

244
drivers/gpio/gpio-xgene.c Normal file
View File

@ -0,0 +1,244 @@
/*
* AppliedMicro X-Gene SoC GPIO Driver
*
* Copyright (c) 2014, Applied Micro Circuits Corporation
* Author: Feng Kan <fkan@apm.com>.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/gpio/driver.h>
#include <linux/types.h>
#include <linux/bitops.h>
#define GPIO_SET_DR_OFFSET 0x0C
#define GPIO_DATA_OFFSET 0x14
#define GPIO_BANK_STRIDE 0x0C
#define XGENE_GPIOS_PER_BANK 16
#define XGENE_MAX_GPIO_BANKS 3
#define XGENE_MAX_GPIOS (XGENE_GPIOS_PER_BANK * XGENE_MAX_GPIO_BANKS)
#define GPIO_BIT_OFFSET(x) (x % XGENE_GPIOS_PER_BANK)
#define GPIO_BANK_OFFSET(x) ((x / XGENE_GPIOS_PER_BANK) * GPIO_BANK_STRIDE)
struct xgene_gpio {
struct gpio_chip chip;
void __iomem *base;
spinlock_t lock;
#ifdef CONFIG_PM
u32 set_dr_val[XGENE_MAX_GPIO_BANKS];
#endif
};
static inline struct xgene_gpio *to_xgene_gpio(struct gpio_chip *chip)
{
return container_of(chip, struct xgene_gpio, chip);
}
static int xgene_gpio_get(struct gpio_chip *gc, unsigned int offset)
{
struct xgene_gpio *chip = to_xgene_gpio(gc);
unsigned long bank_offset;
u32 bit_offset;
bank_offset = GPIO_DATA_OFFSET + GPIO_BANK_OFFSET(offset);
bit_offset = GPIO_BIT_OFFSET(offset);
return !!(ioread32(chip->base + bank_offset) & BIT(bit_offset));
}
static void __xgene_gpio_set(struct gpio_chip *gc, unsigned int offset, int val)
{
struct xgene_gpio *chip = to_xgene_gpio(gc);
unsigned long bank_offset;
u32 setval, bit_offset;
bank_offset = GPIO_SET_DR_OFFSET + GPIO_BANK_OFFSET(offset);
bit_offset = GPIO_BIT_OFFSET(offset) + XGENE_GPIOS_PER_BANK;
setval = ioread32(chip->base + bank_offset);
if (val)
setval |= BIT(bit_offset);
else
setval &= ~BIT(bit_offset);
iowrite32(setval, chip->base + bank_offset);
}
static void xgene_gpio_set(struct gpio_chip *gc, unsigned int offset, int val)
{
struct xgene_gpio *chip = to_xgene_gpio(gc);
unsigned long flags;
spin_lock_irqsave(&chip->lock, flags);
__xgene_gpio_set(gc, offset, val);
spin_unlock_irqrestore(&chip->lock, flags);
}
static int xgene_gpio_dir_in(struct gpio_chip *gc, unsigned int offset)
{
struct xgene_gpio *chip = to_xgene_gpio(gc);
unsigned long flags, bank_offset;
u32 dirval, bit_offset;
bank_offset = GPIO_SET_DR_OFFSET + GPIO_BANK_OFFSET(offset);
bit_offset = GPIO_BIT_OFFSET(offset);
spin_lock_irqsave(&chip->lock, flags);
dirval = ioread32(chip->base + bank_offset);
dirval |= BIT(bit_offset);
iowrite32(dirval, chip->base + bank_offset);
spin_unlock_irqrestore(&chip->lock, flags);
return 0;
}
static int xgene_gpio_dir_out(struct gpio_chip *gc,
unsigned int offset, int val)
{
struct xgene_gpio *chip = to_xgene_gpio(gc);
unsigned long flags, bank_offset;
u32 dirval, bit_offset;
bank_offset = GPIO_SET_DR_OFFSET + GPIO_BANK_OFFSET(offset);
bit_offset = GPIO_BIT_OFFSET(offset);
spin_lock_irqsave(&chip->lock, flags);
dirval = ioread32(chip->base + bank_offset);
dirval &= ~BIT(bit_offset);
iowrite32(dirval, chip->base + bank_offset);
__xgene_gpio_set(gc, offset, val);
spin_unlock_irqrestore(&chip->lock, flags);
return 0;
}
#ifdef CONFIG_PM
static int xgene_gpio_suspend(struct device *dev)
{
struct xgene_gpio *gpio = dev_get_drvdata(dev);
unsigned long bank_offset;
unsigned int bank;
for (bank = 0; bank < XGENE_MAX_GPIO_BANKS; bank++) {
bank_offset = GPIO_SET_DR_OFFSET + bank * GPIO_BANK_STRIDE;
gpio->set_dr_val[bank] = ioread32(gpio->base + bank_offset);
}
return 0;
}
static int xgene_gpio_resume(struct device *dev)
{
struct xgene_gpio *gpio = dev_get_drvdata(dev);
unsigned long bank_offset;
unsigned int bank;
for (bank = 0; bank < XGENE_MAX_GPIO_BANKS; bank++) {
bank_offset = GPIO_SET_DR_OFFSET + bank * GPIO_BANK_STRIDE;
iowrite32(gpio->set_dr_val[bank], gpio->base + bank_offset);
}
return 0;
}
static SIMPLE_DEV_PM_OPS(xgene_gpio_pm, xgene_gpio_suspend, xgene_gpio_resume);
#define XGENE_GPIO_PM_OPS (&xgene_gpio_pm)
#else
#define XGENE_GPIO_PM_OPS NULL
#endif
static int xgene_gpio_probe(struct platform_device *pdev)
{
struct resource *res;
struct xgene_gpio *gpio;
int err = 0;
gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
if (!gpio) {
err = -ENOMEM;
goto err;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
gpio->base = devm_ioremap_nocache(&pdev->dev, res->start,
resource_size(res));
if (!gpio->base) {
err = -ENOMEM;
goto err;
}
gpio->chip.ngpio = XGENE_MAX_GPIOS;
spin_lock_init(&gpio->lock);
gpio->chip.dev = &pdev->dev;
gpio->chip.direction_input = xgene_gpio_dir_in;
gpio->chip.direction_output = xgene_gpio_dir_out;
gpio->chip.get = xgene_gpio_get;
gpio->chip.set = xgene_gpio_set;
gpio->chip.label = dev_name(&pdev->dev);
gpio->chip.base = -1;
platform_set_drvdata(pdev, gpio);
err = gpiochip_add(&gpio->chip);
if (err) {
dev_err(&pdev->dev,
"failed to register gpiochip.\n");
goto err;
}
dev_info(&pdev->dev, "X-Gene GPIO driver registered.\n");
return 0;
err:
dev_err(&pdev->dev, "X-Gene GPIO driver registration failed.\n");
return err;
}
static int xgene_gpio_remove(struct platform_device *pdev)
{
struct xgene_gpio *gpio = platform_get_drvdata(pdev);
gpiochip_remove(&gpio->chip);
return 0;
}
static const struct of_device_id xgene_gpio_of_match[] = {
{ .compatible = "apm,xgene-gpio", },
{},
};
MODULE_DEVICE_TABLE(of, xgene_gpio_of_match);
static struct platform_driver xgene_gpio_driver = {
.driver = {
.name = "xgene-gpio",
.owner = THIS_MODULE,
.of_match_table = xgene_gpio_of_match,
.pm = XGENE_GPIO_PM_OPS,
},
.probe = xgene_gpio_probe,
.remove = xgene_gpio_remove,
};
module_platform_driver(xgene_gpio_driver);
MODULE_AUTHOR("Feng Kan <fkan@apm.com>");
MODULE_DESCRIPTION("APM X-Gene GPIO driver");
MODULE_LICENSE("GPL");

27
drivers/gpio/gpio-xilinx.c
View File

@ -197,6 +197,7 @@ static int xgpio_of_probe(struct device_node *np)
struct xgpio_instance *chip;
int status = 0;
const u32 *tree_info;
u32 ngpio;
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
if (!chip)
@ -211,12 +212,13 @@ static int xgpio_of_probe(struct device_node *np)
/* Update GPIO direction shadow register with default value */
of_property_read_u32(np, "xlnx,tri-default", &chip->gpio_dir);
/* By default assume full GPIO controller */
chip->mmchip.gc.ngpio = 32;
/* Check device node and parent device node for device width */
of_property_read_u32(np, "xlnx,gpio-width",
(u32 *)&chip->mmchip.gc.ngpio);
/*
* Check device node and parent device node for device width
* and assume default width of 32
*/
if (of_property_read_u32(np, "xlnx,gpio-width", &ngpio))
ngpio = 32;
chip->mmchip.gc.ngpio = (u16)ngpio;
spin_lock_init(&chip->gpio_lock);
@ -258,12 +260,13 @@ static int xgpio_of_probe(struct device_node *np)
/* Update GPIO direction shadow register with default value */
of_property_read_u32(np, "xlnx,tri-default-2", &chip->gpio_dir);
/* By default assume full GPIO controller */
chip->mmchip.gc.ngpio = 32;
/* Check device node and parent device node for device width */
of_property_read_u32(np, "xlnx,gpio2-width",
(u32 *)&chip->mmchip.gc.ngpio);
/*
* Check device node and parent device node for device width
* and assume default width of 32
*/
if (of_property_read_u32(np, "xlnx,gpio2-width", &ngpio))
ngpio = 32;
chip->mmchip.gc.ngpio = (u16)ngpio;
spin_lock_init(&chip->gpio_lock);

89
drivers/gpio/gpio-zynq.c
View File

@ -88,16 +88,17 @@
* @chip: instance of the gpio_chip
* @base_addr: base address of the GPIO device
* @clk: clock resource for this controller
* @irq: interrupt for the GPIO device
*/
struct zynq_gpio {
struct gpio_chip chip;
void __iomem *base_addr;
struct clk *clk;
int irq;
};
static struct irq_chip zynq_gpio_level_irqchip;
static struct irq_chip zynq_gpio_edge_irqchip;
/**
* zynq_gpio_get_bank_pin - Get the bank number and pin number within that bank
* for a given pin in the GPIO device
@ -138,6 +139,13 @@ static inline void zynq_gpio_get_bank_pin(unsigned int pin_num,
}
}
static const unsigned int zynq_gpio_bank_offset[] = {
ZYNQ_GPIO_BANK0_PIN_MIN,
ZYNQ_GPIO_BANK1_PIN_MIN,
ZYNQ_GPIO_BANK2_PIN_MIN,
ZYNQ_GPIO_BANK3_PIN_MIN,
};
/**
* zynq_gpio_get_value - Get the state of the specified pin of GPIO device
* @chip: gpio_chip instance to be worked on
@ -427,10 +435,9 @@ static int zynq_gpio_set_irq_type(struct irq_data *irq_data, unsigned int type)
static int zynq_gpio_set_wake(struct irq_data *data, unsigned int on)
{
if (on)
zynq_gpio_irq_unmask(data);
else
zynq_gpio_irq_mask(data);
struct zynq_gpio *gpio = irq_data_get_irq_chip_data(data);
irq_set_irq_wake(gpio->irq, on);
return 0;
}
@ -444,7 +451,8 @@ static struct irq_chip zynq_gpio_level_irqchip = {
.irq_unmask = zynq_gpio_irq_unmask,
.irq_set_type = zynq_gpio_set_irq_type,
.irq_set_wake = zynq_gpio_set_wake,
.flags = IRQCHIP_EOI_THREADED | IRQCHIP_EOI_IF_HANDLED,
.flags = IRQCHIP_EOI_THREADED | IRQCHIP_EOI_IF_HANDLED |
IRQCHIP_MASK_ON_SUSPEND,
};
static struct irq_chip zynq_gpio_edge_irqchip = {
@ -455,8 +463,28 @@ static struct irq_chip zynq_gpio_edge_irqchip = {
.irq_unmask = zynq_gpio_irq_unmask,
.irq_set_type = zynq_gpio_set_irq_type,
.irq_set_wake = zynq_gpio_set_wake,
.flags = IRQCHIP_MASK_ON_SUSPEND,
};
static void zynq_gpio_handle_bank_irq(struct zynq_gpio *gpio,
unsigned int bank_num,
unsigned long pending)
{
unsigned int bank_offset = zynq_gpio_bank_offset[bank_num];
struct irq_domain *irqdomain = gpio->chip.irqdomain;
int offset;
if (!pending)
return;
for_each_set_bit(offset, &pending, 32) {
unsigned int gpio_irq;
gpio_irq = irq_find_mapping(irqdomain, offset + bank_offset);
generic_handle_irq(gpio_irq);
}
}
/**
* zynq_gpio_irqhandler - IRQ handler for the gpio banks of a gpio device
* @irq: irq number of the gpio bank where interrupt has occurred
@ -482,18 +510,7 @@ static void zynq_gpio_irqhandler(unsigned int irq, struct irq_desc *desc)
ZYNQ_GPIO_INTSTS_OFFSET(bank_num));
int_enb = readl_relaxed(gpio->base_addr +
ZYNQ_GPIO_INTMASK_OFFSET(bank_num));
int_sts &= ~int_enb;
if (int_sts) {
int offset;
unsigned long pending = int_sts;
for_each_set_bit(offset, &pending, 32) {
unsigned int gpio_irq =
irq_find_mapping(gpio->chip.irqdomain,
offset);
generic_handle_irq(gpio_irq);
}
}
zynq_gpio_handle_bank_irq(gpio, bank_num, int_sts & ~int_enb);
}
chained_irq_exit(irqchip, desc);
@ -501,7 +518,11 @@ static void zynq_gpio_irqhandler(unsigned int irq, struct irq_desc *desc)
static int __maybe_unused zynq_gpio_suspend(struct device *dev)
{
if (!device_may_wakeup(dev))
struct platform_device *pdev = to_platform_device(dev);
int irq = platform_get_irq(pdev, 0);
struct irq_data *data = irq_get_irq_data(irq);
if (!irqd_is_wakeup_set(data))
return pm_runtime_force_suspend(dev);
return 0;
@ -509,7 +530,11 @@ static int __maybe_unused zynq_gpio_suspend(struct device *dev)
static int __maybe_unused zynq_gpio_resume(struct device *dev)
{
if (!device_may_wakeup(dev))
struct platform_device *pdev = to_platform_device(dev);
int irq = platform_get_irq(pdev, 0);
struct irq_data *data = irq_get_irq_data(irq);
if (!irqd_is_wakeup_set(data))
return pm_runtime_force_resume(dev);
return 0;
@ -570,7 +595,7 @@ static const struct dev_pm_ops zynq_gpio_dev_pm_ops = {
*/
static int zynq_gpio_probe(struct platform_device *pdev)
{
int ret, bank_num, irq;
int ret, bank_num;
struct zynq_gpio *gpio;
struct gpio_chip *chip;
struct resource *res;
@ -586,10 +611,10 @@ static int zynq_gpio_probe(struct platform_device *pdev)
if (IS_ERR(gpio->base_addr))
return PTR_ERR(gpio->base_addr);
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
gpio->irq = platform_get_irq(pdev, 0);
if (gpio->irq < 0) {
dev_err(&pdev->dev, "invalid IRQ\n");
return irq;
return gpio->irq;
}
/* configure the gpio chip */
@ -637,19 +662,16 @@ static int zynq_gpio_probe(struct platform_device *pdev)
goto err_rm_gpiochip;
}
gpiochip_set_chained_irqchip(chip, &zynq_gpio_edge_irqchip, irq,
gpiochip_set_chained_irqchip(chip, &zynq_gpio_edge_irqchip, gpio->irq,
zynq_gpio_irqhandler);
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
device_set_wakeup_capable(&pdev->dev, 1);
return 0;
err_rm_gpiochip:
if (gpiochip_remove(chip))
dev_err(&pdev->dev, "Failed to remove gpio chip\n");
gpiochip_remove(chip);
err_disable_clk:
clk_disable_unprepare(gpio->clk);
@ -664,16 +686,10 @@ err_disable_clk:
*/
static int zynq_gpio_remove(struct platform_device *pdev)
{
int ret;
struct zynq_gpio *gpio = platform_get_drvdata(pdev);
pm_runtime_get_sync(&pdev->dev);
ret = gpiochip_remove(&gpio->chip);
if (ret) {
dev_err(&pdev->dev, "Failed to remove gpio chip\n");
return ret;
}
gpiochip_remove(&gpio->chip);
clk_disable_unprepare(gpio->clk);
device_set_wakeup_capable(&pdev->dev, 0);
return 0;
@ -688,7 +704,6 @@ MODULE_DEVICE_TABLE(of, zynq_gpio_of_match);
static struct platform_driver zynq_gpio_driver = {
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
.pm = &zynq_gpio_dev_pm_ops,
.of_match_table = zynq_gpio_of_match,
},

30
drivers/gpio/gpiolib-acpi.c
View File

@ -25,10 +25,12 @@ struct acpi_gpio_event {
acpi_handle handle;
unsigned int pin;
unsigned int irq;
struct gpio_desc *desc;
};
struct acpi_gpio_connection {
struct list_head node;
unsigned int pin;
struct gpio_desc *desc;
};
@ -143,14 +145,8 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares,
if (!handler)
return AE_BAD_PARAMETER;
desc = gpiochip_get_desc(chip, pin);
desc = gpiochip_request_own_desc(chip, pin, "ACPI:Event");
if (IS_ERR(desc)) {
dev_err(chip->dev, "Failed to get GPIO descriptor\n");
return AE_ERROR;
}
ret = gpiochip_request_own_desc(desc, "ACPI:Event");
if (ret) {
dev_err(chip->dev, "Failed to request GPIO\n");
return AE_ERROR;
}
@ -197,6 +193,7 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares,
event->handle = evt_handle;
event->irq = irq;
event->pin = pin;
event->desc = desc;
ret = request_threaded_irq(event->irq, NULL, handler, irqflags,
"ACPI:Event", event);
@ -280,7 +277,7 @@ void acpi_gpiochip_free_interrupts(struct gpio_chip *chip)
struct gpio_desc *desc;
free_irq(event->irq, event);
desc = gpiochip_get_desc(chip, event->pin);
desc = event->desc;
if (WARN_ON(IS_ERR(desc)))
continue;
gpio_unlock_as_irq(chip, event->pin);
@ -409,26 +406,20 @@ acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
struct gpio_desc *desc;
bool found;
desc = gpiochip_get_desc(chip, pin);
if (IS_ERR(desc)) {
status = AE_ERROR;
goto out;
}
mutex_lock(&achip->conn_lock);
found = false;
list_for_each_entry(conn, &achip->conns, node) {
if (conn->desc == desc) {
if (conn->pin == pin) {
found = true;
desc = conn->desc;
break;
}
}
if (!found) {
int ret;
ret = gpiochip_request_own_desc(desc, "ACPI:OpRegion");
if (ret) {
desc = gpiochip_request_own_desc(chip, pin,
"ACPI:OpRegion");
if (IS_ERR(desc)) {
status = AE_ERROR;
mutex_unlock(&achip->conn_lock);
goto out;
@ -465,6 +456,7 @@ acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
goto out;
}
conn->pin = pin;
conn->desc = desc;
list_add_tail(&conn->node, &achip->conns);
}

90
drivers/gpio/gpiolib.c
View File

@ -308,10 +308,9 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip);
*
* A gpio_chip with any GPIOs still requested may not be removed.
*/
int gpiochip_remove(struct gpio_chip *chip)
void gpiochip_remove(struct gpio_chip *chip)
{
unsigned long flags;
int status = 0;
unsigned id;
acpi_gpiochip_remove(chip);
@ -323,24 +322,15 @@ int gpiochip_remove(struct gpio_chip *chip)
of_gpiochip_remove(chip);
for (id = 0; id < chip->ngpio; id++) {
if (test_bit(FLAG_REQUESTED, &chip->desc[id].flags)) {
status = -EBUSY;
break;
}
}
if (status == 0) {
for (id = 0; id < chip->ngpio; id++)
chip->desc[id].chip = NULL;
list_del(&chip->list);
if (test_bit(FLAG_REQUESTED, &chip->desc[id].flags))
dev_crit(chip->dev, "REMOVING GPIOCHIP WITH GPIOS STILL REQUESTED\n");
}
for (id = 0; id < chip->ngpio; id++)
chip->desc[id].chip = NULL;
list_del(&chip->list);
spin_unlock_irqrestore(&gpio_lock, flags);
if (status == 0)
gpiochip_unexport(chip);
return status;
gpiochip_unexport(chip);
}
EXPORT_SYMBOL_GPL(gpiochip_remove);
@ -395,30 +385,47 @@ static struct gpio_chip *find_chip_by_name(const char *name)
*/
/**
* gpiochip_add_chained_irqchip() - adds a chained irqchip to a gpiochip
* @gpiochip: the gpiochip to add the irqchip to
* @irqchip: the irqchip to add to the gpiochip
* gpiochip_set_chained_irqchip() - sets a chained irqchip to a gpiochip
* @gpiochip: the gpiochip to set the irqchip chain to
* @irqchip: the irqchip to chain to the gpiochip
* @parent_irq: the irq number corresponding to the parent IRQ for this
* chained irqchip
* @parent_handler: the parent interrupt handler for the accumulated IRQ
* coming out of the gpiochip
* coming out of the gpiochip. If the interrupt is nested rather than
* cascaded, pass NULL in this handler argument
*/
void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
struct irq_chip *irqchip,
int parent_irq,
irq_flow_handler_t parent_handler)
{
if (gpiochip->can_sleep) {
chip_err(gpiochip, "you cannot have chained interrupts on a chip that may sleep\n");
unsigned int offset;
if (!gpiochip->irqdomain) {
chip_err(gpiochip, "called %s before setting up irqchip\n",
__func__);
return;
}
/*
* The parent irqchip is already using the chip_data for this
* irqchip, so our callbacks simply use the handler_data.
*/
irq_set_handler_data(parent_irq, gpiochip);
irq_set_chained_handler(parent_irq, parent_handler);
if (parent_handler) {
if (gpiochip->can_sleep) {
chip_err(gpiochip,
"you cannot have chained interrupts on a "
"chip that may sleep\n");
return;
}
/*
* The parent irqchip is already using the chip_data for this
* irqchip, so our callbacks simply use the handler_data.
*/
irq_set_handler_data(parent_irq, gpiochip);
irq_set_chained_handler(parent_irq, parent_handler);
}
/* Set the parent IRQ for all affected IRQs */
for (offset = 0; offset < gpiochip->ngpio; offset++)
irq_set_parent(irq_find_mapping(gpiochip->irqdomain, offset),
parent_irq);
}
EXPORT_SYMBOL_GPL(gpiochip_set_chained_irqchip);
@ -447,7 +454,7 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq,
irq_set_lockdep_class(irq, &gpiochip_irq_lock_class);
irq_set_chip_and_handler(irq, chip->irqchip, chip->irq_handler);
/* Chips that can sleep need nested thread handlers */
if (chip->can_sleep)
if (chip->can_sleep && !chip->irq_not_threaded)
irq_set_nested_thread(irq, 1);
#ifdef CONFIG_ARM
set_irq_flags(irq, IRQF_VALID);
@ -524,7 +531,8 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip)
/* Remove all IRQ mappings and delete the domain */
if (gpiochip->irqdomain) {
for (offset = 0; offset < gpiochip->ngpio; offset++)
irq_dispose_mapping(gpiochip->irq_base + offset);
irq_dispose_mapping(
irq_find_mapping(gpiochip->irqdomain, offset));
irq_domain_remove(gpiochip->irqdomain);
}
@ -895,12 +903,22 @@ EXPORT_SYMBOL_GPL(gpiochip_is_requested);
* allows the GPIO chip module to be unloaded as needed (we assume that the
* GPIO chip driver handles freeing the GPIOs it has requested).
*/
int gpiochip_request_own_desc(struct gpio_desc *desc, const char *label)
struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *chip, u16 hwnum,
const char *label)
{
if (!desc || !desc->chip)
return -EINVAL;
struct gpio_desc *desc = gpiochip_get_desc(chip, hwnum);
int err;
return __gpiod_request(desc, label);
if (IS_ERR(desc)) {
chip_err(chip, "failed to get GPIO descriptor\n");
return desc;
}
err = __gpiod_request(desc, label);
if (err < 0)
return ERR_PTR(err);
return desc;
}
EXPORT_SYMBOL_GPL(gpiochip_request_own_desc);
@ -1652,7 +1670,7 @@ struct gpio_desc *__must_check __gpiod_get_index(struct device *dev,
* a result. In that case, use platform lookup as a fallback.
*/
if (!desc || desc == ERR_PTR(-ENOENT)) {
dev_dbg(dev, "using lookup tables for GPIO lookup");
dev_dbg(dev, "using lookup tables for GPIO lookup\n");
desc = gpiod_find(dev, con_id, idx, &lookupflags);
}

6
drivers/hid/hid-cp2112.c
View File

@ -1069,8 +1069,7 @@ static int cp2112_probe(struct hid_device *hdev, const struct hid_device_id *id)
return ret;
err_gpiochip_remove:
if (gpiochip_remove(&dev->gc) < 0)
hid_err(hdev, "error removing gpio chip\n");
gpiochip_remove(&dev->gc);
err_free_i2c:
i2c_del_adapter(&dev->adap);
err_free_dev:
@ -1089,8 +1088,7 @@ static void cp2112_remove(struct hid_device *hdev)
struct cp2112_device *dev = hid_get_drvdata(hdev);
sysfs_remove_group(&hdev->dev.kobj, &cp2112_attr_group);
if (gpiochip_remove(&dev->gc))
hid_err(hdev, "unable to remove gpio chip\n");
gpiochip_remove(&dev->gc);
i2c_del_adapter(&dev->adap);
/* i2c_del_adapter has finished removing all i2c devices from our
* adapter. Well behaved devices should no longer call our cp2112_xfer

4
drivers/input/keyboard/adp5588-keys.c
View File

@ -251,9 +251,7 @@ static void adp5588_gpio_remove(struct adp5588_kpad *kpad)
dev_warn(dev, "teardown failed %d\n", error);
}
error = gpiochip_remove(&kpad->gc);
if (error)
dev_warn(dev, "gpiochip_remove failed %d\n", error);
gpiochip_remove(&kpad->gc);
}
#else
static inline int adp5588_gpio_add(struct adp5588_kpad *kpad)

4
drivers/input/keyboard/adp5589-keys.c
View File

@ -567,9 +567,7 @@ static void adp5589_gpio_remove(struct adp5589_kpad *kpad)
dev_warn(dev, "teardown failed %d\n", error);
}
error = gpiochip_remove(&kpad->gc);
if (error)
dev_warn(dev, "gpiochip_remove failed %d\n", error);
gpiochip_remove(&kpad->gc);
}
#else
static inline int adp5589_gpio_add(struct adp5589_kpad *kpad)

10
drivers/input/touchscreen/ad7879.c
View File

@ -470,14 +470,10 @@ static int ad7879_gpio_add(struct ad7879 *ts,
static void ad7879_gpio_remove(struct ad7879 *ts)
{
const struct ad7879_platform_data *pdata = dev_get_platdata(ts->dev);
int ret;
if (pdata->gpio_export) {
ret = gpiochip_remove(&ts->gc);
if (ret)
dev_err(ts->dev, "failed to remove gpio %d\n",
ts->gc.base);
}
if (pdata->gpio_export)
gpiochip_remove(&ts->gc);
}
#else
static inline int ad7879_gpio_add(struct ad7879 *ts,

10
drivers/leds/leds-pca9532.c
View File

@ -319,14 +319,8 @@ static int pca9532_destroy_devices(struct pca9532_data *data, int n_devs)
}
#ifdef CONFIG_LEDS_PCA9532_GPIO
if (data->gpio.dev) {
int err = gpiochip_remove(&data->gpio);
if (err) {
dev_err(&data->client->dev, "%s failed, %d\n",
"gpiochip_remove()", err);
return err;
}
}
if (data->gpio.dev)
gpiochip_remove(&data->gpio);
#endif
return 0;

7
drivers/leds/leds-tca6507.c
View File

@ -667,11 +667,8 @@ static int tca6507_probe_gpios(struct i2c_client *client,
static void tca6507_remove_gpio(struct tca6507_chip *tca)
{
if (tca->gpio.ngpio) {
int err = gpiochip_remove(&tca->gpio);
dev_err(&tca->client->dev, "%s failed, %d\n",
"gpiochip_remove()", err);
}
if (tca->gpio.ngpio)
gpiochip_remove(&tca->gpio);
}
#else /* CONFIG_GPIOLIB */
static int tca6507_probe_gpios(struct i2c_client *client,

10
drivers/media/dvb-frontends/cxd2820r_core.c
View File

@ -584,18 +584,14 @@ static int cxd2820r_get_frontend_algo(struct dvb_frontend *fe)
static void cxd2820r_release(struct dvb_frontend *fe)
{
struct cxd2820r_priv *priv = fe->demodulator_priv;
int uninitialized_var(ret); /* silence compiler warning */
dev_dbg(&priv->i2c->dev, "%s\n", __func__);
#ifdef CONFIG_GPIOLIB
/* remove GPIOs */
if (priv->gpio_chip.label) {
ret = gpiochip_remove(&priv->gpio_chip);
if (ret)
dev_err(&priv->i2c->dev, "%s: gpiochip_remove() " \
"failed=%d\n", KBUILD_MODNAME, ret);
}
if (priv->gpio_chip.label)
gpiochip_remove(&priv->gpio_chip);
#endif
kfree(priv);
return;

3
drivers/mfd/asic3.c
View File

@ -605,7 +605,8 @@ static int asic3_gpio_remove(struct platform_device *pdev)
{
struct asic3 *asic = platform_get_drvdata(pdev);
return gpiochip_remove(&asic->gpio);
gpiochip_remove(&asic->gpio);
return 0;
}
static void asic3_clk_enable(struct asic3 *asic, struct asic3_clk *clk)

8
drivers/mfd/htc-i2cpld.c
View File

@ -481,15 +481,9 @@ static int htcpld_register_chip_gpio(
ret = gpiochip_add(&(chip->chip_in));
if (ret) {
int error;
dev_warn(dev, "Unable to register input GPIOs for 0x%x: %d\n",
plat_chip_data->addr, ret);
error = gpiochip_remove(&(chip->chip_out));
if (error)
dev_warn(dev, "Error while trying to unregister gpio chip: %d\n", error);
gpiochip_remove(&(chip->chip_out));
return ret;
}

17
drivers/mfd/sm501.c
View File

@ -1047,7 +1047,6 @@ static int sm501_register_gpio(struct sm501_devdata *sm)
struct sm501_gpio *gpio = &sm->gpio;
resource_size_t iobase = sm->io_res->start + SM501_GPIO;
int ret;
int tmp;
dev_dbg(sm->dev, "registering gpio block %08llx\n",
(unsigned long long)iobase);
@ -1086,11 +1085,7 @@ static int sm501_register_gpio(struct sm501_devdata *sm)
return 0;
err_low_chip:
tmp = gpiochip_remove(&gpio->low.gpio);
if (tmp) {
dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n");
return ret;
}
gpiochip_remove(&gpio->low.gpio);
err_mapped:
iounmap(gpio->regs);
@ -1105,18 +1100,12 @@ static int sm501_register_gpio(struct sm501_devdata *sm)
static void sm501_gpio_remove(struct sm501_devdata *sm)
{
struct sm501_gpio *gpio = &sm->gpio;
int ret;
if (!sm->gpio.registered)
return;
ret = gpiochip_remove(&gpio->low.gpio);
if (ret)
dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n");
ret = gpiochip_remove(&gpio->high.gpio);
if (ret)
dev_err(sm->dev, "cannot remove high chip, cannot tidy up\n");
gpiochip_remove(&gpio->low.gpio);
gpiochip_remove(&gpio->high.gpio);
iounmap(gpio->regs);
release_resource(gpio->regs_res);

13
drivers/mfd/tc6393xb.c
View File

@ -607,7 +607,7 @@ static int tc6393xb_probe(struct platform_device *dev)
struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
struct tc6393xb *tc6393xb;
struct resource *iomem, *rscr;
int ret, temp;
int ret;
iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (!iomem)
@ -714,7 +714,7 @@ err_setup:
err_gpio_add:
if (tc6393xb->gpio.base != -1)
temp = gpiochip_remove(&tc6393xb->gpio);
gpiochip_remove(&tc6393xb->gpio);
tcpd->disable(dev);
err_enable:
clk_disable(tc6393xb->clk);
@ -744,13 +744,8 @@ static int tc6393xb_remove(struct platform_device *dev)
tc6393xb_detach_irq(dev);
if (tc6393xb->gpio.base != -1) {
ret = gpiochip_remove(&tc6393xb->gpio);
if (ret) {
dev_err(&dev->dev, "Can't remove gpio chip: %d\n", ret);
return ret;
}
}
if (tc6393xb->gpio.base != -1)
gpiochip_remove(&tc6393xb->gpio);
ret = tcpd->disable(dev);
clk_disable(tc6393xb->clk);

8
drivers/mfd/ucb1x00-core.c
View File

@ -621,7 +621,6 @@ static void ucb1x00_remove(struct mcp *mcp)
struct ucb1x00_plat_data *pdata = mcp->attached_device.platform_data;
struct ucb1x00 *ucb = mcp_get_drvdata(mcp);
struct list_head *l, *n;
int ret;
mutex_lock(&ucb1x00_mutex);
list_del(&ucb->node);
@ -631,11 +630,8 @@ static void ucb1x00_remove(struct mcp *mcp)
}
mutex_unlock(&ucb1x00_mutex);
if (ucb->gpio.base != -1) {
ret = gpiochip_remove(&ucb->gpio);
if (ret)
dev_err(&ucb->dev, "Can't remove gpio chip: %d\n", ret);
}
if (ucb->gpio.base != -1)
gpiochip_remove(&ucb->gpio);
irq_set_chained_handler(ucb->irq, NULL);
irq_free_descs(ucb->irq_base, 16);

2
drivers/pinctrl/Kconfig
View File

@ -86,7 +86,7 @@ config PINCTRL_BCM2835
config PINCTRL_BCM281XX
bool "Broadcom BCM281xx pinctrl driver"
depends on OF
depends on OF && (ARCH_BCM_MOBILE || COMPILE_TEST)
select PINMUX
select PINCONF
select GENERIC_PINCONF

16
drivers/pinctrl/nomadik/pinctrl-abx500.c
View File

@ -1174,7 +1174,7 @@ static int abx500_gpio_probe(struct platform_device *pdev)
const struct of_device_id *match;
struct abx500_pinctrl *pct;
unsigned int id = -1;
int ret, err;
int ret;
int i;
if (!np) {
@ -1266,10 +1266,7 @@ static int abx500_gpio_probe(struct platform_device *pdev)
return 0;
out_rem_chip:
err = gpiochip_remove(&pct->chip);
if (err)
dev_info(&pdev->dev, "failed to remove gpiochip\n");
gpiochip_remove(&pct->chip);
return ret;
}
@ -1280,15 +1277,8 @@ out_rem_chip:
static int abx500_gpio_remove(struct platform_device *pdev)
{
struct abx500_pinctrl *pct = platform_get_drvdata(pdev);
int ret;
ret = gpiochip_remove(&pct->chip);
if (ret < 0) {
dev_err(pct->dev, "unable to remove gpiochip: %d\n",
ret);
return ret;
}
gpiochip_remove(&pct->chip);
return 0;
}

2
drivers/pinctrl/nomadik/pinctrl-nomadik.c
View File

@ -1276,7 +1276,7 @@ static int nmk_gpio_probe(struct platform_device *dev)
IRQ_TYPE_EDGE_FALLING);
if (ret) {
dev_err(&dev->dev, "could not add irqchip\n");
ret = gpiochip_remove(&nmk_chip->chip);
gpiochip_remove(&nmk_chip->chip);
return -ENODEV;
}
/* Then register the chain on the parent IRQ */

8
drivers/pinctrl/qcom/pinctrl-msm.c
View File

@ -936,14 +936,8 @@ EXPORT_SYMBOL(msm_pinctrl_probe);
int msm_pinctrl_remove(struct platform_device *pdev)
{
struct msm_pinctrl *pctrl = platform_get_drvdata(pdev);
int ret;
ret = gpiochip_remove(&pctrl->chip);
if (ret) {
dev_err(&pdev->dev, "Failed to remove gpiochip\n");
return ret;
}
gpiochip_remove(&pctrl->chip);
pinctrl_unregister(pctrl->pctrl);
unregister_restart_handler(&pctrl->restart_nb);

6
drivers/pinctrl/samsung/pinctrl-exynos5440.c
View File

@ -874,11 +874,7 @@ static int exynos5440_gpiolib_register(struct platform_device *pdev,
static int exynos5440_gpiolib_unregister(struct platform_device *pdev,
struct exynos5440_pinctrl_priv_data *priv)
{
int ret = gpiochip_remove(priv->gc);
if (ret) {
dev_err(&pdev->dev, "gpio chip remove failed\n");
return ret;
}
gpiochip_remove(priv->gc);
return 0;
}

15
drivers/pinctrl/samsung/pinctrl-samsung.c
View File

@ -946,9 +946,7 @@ static int samsung_gpiolib_register(struct platform_device *pdev,
fail:
for (--i, --bank; i >= 0; --i, --bank)
if (gpiochip_remove(&bank->gpio_chip))
dev_err(&pdev->dev, "gpio chip %s remove failed\n",
bank->gpio_chip.label);
gpiochip_remove(&bank->gpio_chip);
return ret;
}
@ -958,16 +956,11 @@ static int samsung_gpiolib_unregister(struct platform_device *pdev,
{
struct samsung_pin_ctrl *ctrl = drvdata->ctrl;
struct samsung_pin_bank *bank = ctrl->pin_banks;
int ret = 0;
int i;
for (i = 0; !ret && i < ctrl->nr_banks; ++i, ++bank)
ret = gpiochip_remove(&bank->gpio_chip);
if (ret)
dev_err(&pdev->dev, "gpio chip remove failed\n");
return ret;
for (i = 0; i < ctrl->nr_banks; ++i, ++bank)
gpiochip_remove(&bank->gpio_chip);
return 0;
}
static const struct of_device_id samsung_pinctrl_dt_match[];

3
drivers/pinctrl/sirf/pinctrl-sirf.c
View File

@ -891,8 +891,7 @@ static int sirfsoc_gpio_probe(struct device_node *np)
out_no_range:
out_banks:
if (gpiochip_remove(&sgpio->chip.gc))
dev_err(&pdev->dev, "could not remove gpio chip\n");
gpiochip_remove(&sgpio->chip.gc);
out:
iounmap(regs);
return err;

3
drivers/platform/x86/intel_pmic_gpio.c
View File

@ -301,8 +301,7 @@ static int platform_pmic_gpio_probe(struct platform_device *pdev)
return 0;
fail_request_irq:
if (gpiochip_remove(&pg->chip))
pr_err("gpiochip_remove failed\n");
gpiochip_remove(&pg->chip);
err:
iounmap(pg->gpiointr);
err2:

3
drivers/ssb/driver_gpio.c
View File

@ -475,7 +475,8 @@ int ssb_gpio_unregister(struct ssb_bus *bus)
{
if (ssb_chipco_available(&bus->chipco) ||
ssb_extif_available(&bus->extif)) {
return gpiochip_remove(&bus->gpio);
gpiochip_remove(&bus->gpio);
return 0;
} else {
SSB_WARN_ON(1);
}

4
drivers/staging/vme/devices/vme_pio2_gpio.c
View File

@ -221,9 +221,7 @@ void pio2_gpio_exit(struct pio2_card *card)
{
const char *label = card->gc.label;
if (gpiochip_remove(&(card->gc)))
dev_err(&card->vdev->dev, "Failed to remove GPIO\n");
gpiochip_remove(&(card->gc));
kfree(label);
}

10
drivers/tty/serial/max310x.c
View File

@ -1248,7 +1248,7 @@ static int max310x_probe(struct device *dev, struct max310x_devtype *devtype,
mutex_destroy(&s->mutex);
#ifdef CONFIG_GPIOLIB
WARN_ON(gpiochip_remove(&s->gpio));
gpiochip_remove(&s->gpio);
out_uart:
#endif
@ -1263,12 +1263,10 @@ out_clk:
static int max310x_remove(struct device *dev)
{
struct max310x_port *s = dev_get_drvdata(dev);
int i, ret = 0;
int i;
#ifdef CONFIG_GPIOLIB
ret = gpiochip_remove(&s->gpio);
if (ret)
return ret;
gpiochip_remove(&s->gpio);
#endif
for (i = 0; i < s->uart.nr; i++) {
@ -1282,7 +1280,7 @@ static int max310x_remove(struct device *dev)
uart_unregister_driver(&s->uart);
clk_disable_unprepare(s->clk);
return ret;
return 0;
}
static const struct of_device_id __maybe_unused max310x_dt_ids[] = {

13
drivers/tty/serial/sc16is7xx.c
View File

@ -1157,7 +1157,7 @@ static int sc16is7xx_probe(struct device *dev,
#ifdef CONFIG_GPIOLIB
if (devtype->nr_gpio)
WARN_ON(gpiochip_remove(&s->gpio));
gpiochip_remove(&s->gpio);
out_uart:
#endif
@ -1173,14 +1173,11 @@ out_clk:
static int sc16is7xx_remove(struct device *dev)
{
struct sc16is7xx_port *s = dev_get_drvdata(dev);
int i, ret = 0;
int i;
#ifdef CONFIG_GPIOLIB
if (s->devtype->nr_gpio) {
ret = gpiochip_remove(&s->gpio);
if (ret)
return ret;
}
if (s->devtype->nr_gpio)
gpiochip_remove(&s->gpio);
#endif
for (i = 0; i < s->uart.nr; i++) {
@ -1195,7 +1192,7 @@ static int sc16is7xx_remove(struct device *dev)
if (!IS_ERR(s->clk))
clk_disable_unprepare(s->clk);
return ret;
return 0;
}
static const struct of_device_id __maybe_unused sc16is7xx_dt_ids[] = {

10
drivers/video/fbdev/via/via-gpio.c
View File

@ -270,7 +270,7 @@ static int viafb_gpio_probe(struct platform_device *platdev)
static int viafb_gpio_remove(struct platform_device *platdev)
{
unsigned long flags;
int ret = 0, i;
int i;
#ifdef CONFIG_PM
viafb_pm_unregister(&viafb_gpio_pm_hooks);
@ -280,11 +280,7 @@ static int viafb_gpio_remove(struct platform_device *platdev)
* Get unregistered.
*/
if (viafb_gpio_config.gpio_chip.ngpio > 0) {
ret = gpiochip_remove(&viafb_gpio_config.gpio_chip);
if (ret) { /* Somebody still using it? */
printk(KERN_ERR "Viafb: GPIO remove failed\n");
return ret;
}
gpiochip_remove(&viafb_gpio_config.gpio_chip);
}
/*
* Disable the ports.
@ -294,7 +290,7 @@ static int viafb_gpio_remove(struct platform_device *platdev)
viafb_gpio_disable(viafb_gpio_config.active_gpios[i]);
viafb_gpio_config.gpio_chip.ngpio = 0;
spin_unlock_irqrestore(&viafb_gpio_config.vdev->reg_lock, flags);
return ret;
return 0;
}
static struct platform_driver via_gpio_driver = {

2
include/asm-generic/gpio.h
View File

@ -27,7 +27,7 @@
*/
#ifndef ARCH_NR_GPIOS
#define ARCH_NR_GPIOS 256
#define ARCH_NR_GPIOS 512
#endif
/*

8
include/linux/gpio/driver.h
View File

@ -56,6 +56,8 @@ struct seq_file;
* as the chip access may sleep when e.g. reading out the IRQ status
* registers.
* @exported: flags if the gpiochip is exported for use from sysfs. Private.
* @irq_not_threaded: flag must be set if @can_sleep is set but the
* IRQs don't need to be threaded
*
* A gpio_chip can help platforms abstract various sources of GPIOs so
* they can all be accessed through a common programing interface.
@ -101,6 +103,7 @@ struct gpio_chip {
struct gpio_desc *desc;
const char *const *names;
bool can_sleep;
bool irq_not_threaded;
bool exported;
#ifdef CONFIG_GPIOLIB_IRQCHIP
@ -141,7 +144,7 @@ extern const char *gpiochip_is_requested(struct gpio_chip *chip,
/* add/remove chips */
extern int gpiochip_add(struct gpio_chip *chip);
extern int gpiochip_remove(struct gpio_chip *chip);
extern void gpiochip_remove(struct gpio_chip *chip);
extern struct gpio_chip *gpiochip_find(void *data,
int (*match)(struct gpio_chip *chip, void *data));
@ -166,7 +169,8 @@ int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
#endif /* CONFIG_GPIOLIB_IRQCHIP */
int gpiochip_request_own_desc(struct gpio_desc *desc, const char *label);
struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *chip, u16 hwnum,
const char *label);
void gpiochip_free_own_desc(struct gpio_desc *desc);
#else /* CONFIG_GPIOLIB */

32
include/linux/platform_data/gpio-dwapb.h Normal file
View File

@ -0,0 +1,32 @@
/*
* Copyright(c) 2014 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#ifndef GPIO_DW_APB_H
#define GPIO_DW_APB_H
struct dwapb_port_property {
struct device_node *node;
const char *name;
unsigned int idx;
unsigned int ngpio;
unsigned int gpio_base;
unsigned int irq;
bool irq_shared;
};
struct dwapb_platform_data {
struct dwapb_port_property *properties;
unsigned int nports;
};
#endif

18
include/linux/spi/mcp23s08.h
View File

@ -22,4 +22,22 @@ struct mcp23s08_platform_data {
* base to base+15 (or base+31 for s17 variant).
*/
unsigned base;
/* Marks the device as a interrupt controller.
* NOTE: The interrupt functionality is only supported for i2c
* versions of the chips. The spi chips can also do the interrupts,
* but this is not supported by the linux driver yet.
*/
bool irq_controller;
/* Sets the mirror flag in the IOCON register. Devices
* with two interrupt outputs (these are the devices ending with 17 and
* those that have 16 IOs) have two IO banks: IO 0-7 form bank 1 and
* IO 8-15 are bank 2. These chips have two different interrupt outputs:
* One for bank 1 and another for bank 2. If irq-mirror is set, both
* interrupts are generated regardless of the bank that an input change
* occurred on. If it is not set, the interrupt are only generated for
* the bank they belong to.
* On devices with only one interrupt output this property is useless.
*/
bool mirror;
};

5
sound/soc/codecs/wm5100.c
View File

@ -2319,11 +2319,8 @@ static void wm5100_init_gpio(struct i2c_client *i2c)
static void wm5100_free_gpio(struct i2c_client *i2c)
{
struct wm5100_priv *wm5100 = i2c_get_clientdata(i2c);
int ret;
ret = gpiochip_remove(&wm5100->gpio_chip);
if (ret != 0)
dev_err(&i2c->dev, "Failed to remove GPIOs: %d\n", ret);
gpiochip_remove(&wm5100->gpio_chip);
}
#else
static void wm5100_init_gpio(struct i2c_client *i2c)

6
sound/soc/codecs/wm8903.c
View File

@ -1877,11 +1877,7 @@ static void wm8903_init_gpio(struct wm8903_priv *wm8903)
static void wm8903_free_gpio(struct wm8903_priv *wm8903)
{
int ret;
ret = gpiochip_remove(&wm8903->gpio_chip);
if (ret != 0)
dev_err(wm8903->dev, "Failed to remove GPIOs: %d\n", ret);
gpiochip_remove(&wm8903->gpio_chip);
}
#else
static void wm8903_init_gpio(struct wm8903_priv *wm8903)

5
sound/soc/codecs/wm8962.c
View File

@ -3398,11 +3398,8 @@ static void wm8962_init_gpio(struct snd_soc_codec *codec)
static void wm8962_free_gpio(struct snd_soc_codec *codec)
{
struct wm8962_priv *wm8962 = snd_soc_codec_get_drvdata(codec);
int ret;
ret = gpiochip_remove(&wm8962->gpio_chip);
if (ret != 0)
dev_err(codec->dev, "Failed to remove GPIOs: %d\n", ret);
gpiochip_remove(&wm8962->gpio_chip);
}
#else
static void wm8962_init_gpio(struct snd_soc_codec *codec)

6
sound/soc/codecs/wm8996.c
View File

@ -2216,11 +2216,7 @@ static void wm8996_init_gpio(struct wm8996_priv *wm8996)
static void wm8996_free_gpio(struct wm8996_priv *wm8996)
{
int ret;
ret = gpiochip_remove(&wm8996->gpio_chip);
if (ret != 0)
dev_err(wm8996->dev, "Failed to remove GPIOs: %d\n", ret);
gpiochip_remove(&wm8996->gpio_chip);
}
#else
static void wm8996_init_gpio(struct wm8996_priv *wm8996)