Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-18 10:01:43 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge branch 'pl061' into devel

Browse Source
This commit is contained in:
Linus Walleij 2016-12-07 15:23:45 +01:00
commit eb485c7d9e
3 changed files with 93 additions and 130 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/mach-integrator/impd1.c
View File

@ -21,7 +21,6 @@
#include <linux/amba/bus.h>
#include <linux/amba/clcd.h>
#include <linux/amba/mmci.h>
#include <linux/amba/pl061.h>
#include <linux/io.h>
#include <linux/platform_data/clk-integrator.h>
#include <linux/slab.h>

206
drivers/gpio/gpio-pl061.c
View File

@ -23,7 +23,6 @@
#include <linux/gpio.h>
#include <linux/device.h>
#include <linux/amba/bus.h>
#include <linux/amba/pl061.h>
#include <linux/slab.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pm.h>
@ -50,11 +49,12 @@ struct pl061_context_save_regs {
};
#endif
struct pl061_gpio {
struct pl061 {
spinlock_t lock;
void __iomem *base;
struct gpio_chip gc;
int parent_irq;
#ifdef CONFIG_PM
struct pl061_context_save_regs csave_regs;
@ -63,22 +63,22 @@ struct pl061_gpio {
static int pl061_get_direction(struct gpio_chip *gc, unsigned offset)
{
struct pl061_gpio *chip = gpiochip_get_data(gc);
struct pl061 *pl061 = gpiochip_get_data(gc);
return !(readb(chip->base + GPIODIR) & BIT(offset));
return !(readb(pl061->base + GPIODIR) & BIT(offset));
}
static int pl061_direction_input(struct gpio_chip *gc, unsigned offset)
{
struct pl061_gpio *chip = gpiochip_get_data(gc);
struct pl061 *pl061 = gpiochip_get_data(gc);
unsigned long flags;
unsigned char gpiodir;
spin_lock_irqsave(&chip->lock, flags);
gpiodir = readb(chip->base + GPIODIR);
spin_lock_irqsave(&pl061->lock, flags);
gpiodir = readb(pl061->base + GPIODIR);
gpiodir &= ~(BIT(offset));
writeb(gpiodir, chip->base + GPIODIR);
spin_unlock_irqrestore(&chip->lock, flags);
writeb(gpiodir, pl061->base + GPIODIR);
spin_unlock_irqrestore(&pl061->lock, flags);
return 0;
}
@ -86,44 +86,44 @@ static int pl061_direction_input(struct gpio_chip *gc, unsigned offset)
static int pl061_direction_output(struct gpio_chip *gc, unsigned offset,
int value)
{
struct pl061_gpio *chip = gpiochip_get_data(gc);
struct pl061 *pl061 = gpiochip_get_data(gc);
unsigned long flags;
unsigned char gpiodir;
spin_lock_irqsave(&chip->lock, flags);
writeb(!!value << offset, chip->base + (BIT(offset + 2)));
gpiodir = readb(chip->base + GPIODIR);
spin_lock_irqsave(&pl061->lock, flags);
writeb(!!value << offset, pl061->base + (BIT(offset + 2)));
gpiodir = readb(pl061->base + GPIODIR);
gpiodir |= BIT(offset);
writeb(gpiodir, chip->base + GPIODIR);
writeb(gpiodir, pl061->base + GPIODIR);
/*
* gpio value is set again, because pl061 doesn't allow to set value of
* a gpio pin before configuring it in OUT mode.
*/
writeb(!!value << offset, chip->base + (BIT(offset + 2)));
spin_unlock_irqrestore(&chip->lock, flags);
writeb(!!value << offset, pl061->base + (BIT(offset + 2)));
spin_unlock_irqrestore(&pl061->lock, flags);
return 0;
}
static int pl061_get_value(struct gpio_chip *gc, unsigned offset)
{
struct pl061_gpio *chip = gpiochip_get_data(gc);
struct pl061 *pl061 = gpiochip_get_data(gc);
return !!readb(chip->base + (BIT(offset + 2)));
return !!readb(pl061->base + (BIT(offset + 2)));
}
static void pl061_set_value(struct gpio_chip *gc, unsigned offset, int value)
{
struct pl061_gpio *chip = gpiochip_get_data(gc);
struct pl061 *pl061 = gpiochip_get_data(gc);
writeb(!!value << offset, chip->base + (BIT(offset + 2)));
writeb(!!value << offset, pl061->base + (BIT(offset + 2)));
}
static int pl061_irq_type(struct irq_data *d, unsigned trigger)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct pl061_gpio *chip = gpiochip_get_data(gc);
struct pl061 *pl061 = gpiochip_get_data(gc);
int offset = irqd_to_hwirq(d);
unsigned long flags;
u8 gpiois, gpioibe, gpioiev;
@ -143,11 +143,11 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
}
spin_lock_irqsave(&chip->lock, flags);
spin_lock_irqsave(&pl061->lock, flags);
gpioiev = readb(chip->base + GPIOIEV);
gpiois = readb(chip->base + GPIOIS);
gpioibe = readb(chip->base + GPIOIBE);
gpioiev = readb(pl061->base + GPIOIEV);
gpiois = readb(pl061->base + GPIOIS);
gpioibe = readb(pl061->base + GPIOIBE);
if (trigger & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
bool polarity = trigger & IRQ_TYPE_LEVEL_HIGH;
@ -199,11 +199,11 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
offset);
}
writeb(gpiois, chip->base + GPIOIS);
writeb(gpioibe, chip->base + GPIOIBE);
writeb(gpioiev, chip->base + GPIOIEV);
writeb(gpiois, pl061->base + GPIOIS);
writeb(gpioibe, pl061->base + GPIOIBE);
writeb(gpioiev, pl061->base + GPIOIEV);
spin_unlock_irqrestore(&chip->lock, flags);
spin_unlock_irqrestore(&pl061->lock, flags);
return 0;
}
@ -213,12 +213,12 @@ static void pl061_irq_handler(struct irq_desc *desc)
unsigned long pending;
int offset;
struct gpio_chip *gc = irq_desc_get_handler_data(desc);
struct pl061_gpio *chip = gpiochip_get_data(gc);
struct pl061 *pl061 = gpiochip_get_data(gc);
struct irq_chip *irqchip = irq_desc_get_chip(desc);
chained_irq_enter(irqchip, desc);
pending = readb(chip->base + GPIOMIS);
pending = readb(pl061->base + GPIOMIS);
if (pending) {
for_each_set_bit(offset, &pending, PL061_GPIO_NR)
generic_handle_irq(irq_find_mapping(gc->irqdomain,
@ -231,27 +231,27 @@ static void pl061_irq_handler(struct irq_desc *desc)
static void pl061_irq_mask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct pl061_gpio *chip = gpiochip_get_data(gc);
struct pl061 *pl061 = gpiochip_get_data(gc);
u8 mask = BIT(irqd_to_hwirq(d) % PL061_GPIO_NR);
u8 gpioie;
spin_lock(&chip->lock);
gpioie = readb(chip->base + GPIOIE) & ~mask;
writeb(gpioie, chip->base + GPIOIE);
spin_unlock(&chip->lock);
spin_lock(&pl061->lock);
gpioie = readb(pl061->base + GPIOIE) & ~mask;
writeb(gpioie, pl061->base + GPIOIE);
spin_unlock(&pl061->lock);
}
static void pl061_irq_unmask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct pl061_gpio *chip = gpiochip_get_data(gc);
struct pl061 *pl061 = gpiochip_get_data(gc);
u8 mask = BIT(irqd_to_hwirq(d) % PL061_GPIO_NR);
u8 gpioie;
spin_lock(&chip->lock);
gpioie = readb(chip->base + GPIOIE) | mask;
writeb(gpioie, chip->base + GPIOIE);
spin_unlock(&chip->lock);
spin_lock(&pl061->lock);
gpioie = readb(pl061->base + GPIOIE) | mask;
writeb(gpioie, pl061->base + GPIOIE);
spin_unlock(&pl061->lock);
}
/**
@ -265,19 +265,20 @@ static void pl061_irq_unmask(struct irq_data *d)
static void pl061_irq_ack(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct pl061_gpio *chip = gpiochip_get_data(gc);
struct pl061 *pl061 = gpiochip_get_data(gc);
u8 mask = BIT(irqd_to_hwirq(d) % PL061_GPIO_NR);
spin_lock(&chip->lock);
writeb(mask, chip->base + GPIOIC);
spin_unlock(&chip->lock);
spin_lock(&pl061->lock);
writeb(mask, pl061->base + GPIOIC);
spin_unlock(&pl061->lock);
}
static int pl061_irq_set_wake(struct irq_data *d, unsigned int state)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct pl061 *pl061 = gpiochip_get_data(gc);
return irq_set_irq_wake(gc->irq_parent, state);
return irq_set_irq_wake(pl061->parent_irq, state);
}
static struct irq_chip pl061_irqchip = {
@ -292,81 +293,60 @@ static struct irq_chip pl061_irqchip = {
static int pl061_probe(struct amba_device *adev, const struct amba_id *id)
{
struct device *dev = &adev->dev;
struct pl061_platform_data *pdata = dev_get_platdata(dev);
struct pl061_gpio *chip;
int ret, irq, i, irq_base;
struct pl061 *pl061;
int ret, irq;
chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
if (chip == NULL)
pl061 = devm_kzalloc(dev, sizeof(*pl061), GFP_KERNEL);
if (pl061 == NULL)
return -ENOMEM;
if (pdata) {
chip->gc.base = pdata->gpio_base;
irq_base = pdata->irq_base;
if (irq_base <= 0) {
dev_err(&adev->dev, "invalid IRQ base in pdata\n");
return -ENODEV;
}
} else {
chip->gc.base = -1;
irq_base = 0;
}
pl061->base = devm_ioremap_resource(dev, &adev->res);
if (IS_ERR(pl061->base))
return PTR_ERR(pl061->base);
chip->base = devm_ioremap_resource(dev, &adev->res);
if (IS_ERR(chip->base))
return PTR_ERR(chip->base);
spin_lock_init(&chip->lock);
spin_lock_init(&pl061->lock);
if (of_property_read_bool(dev->of_node, "gpio-ranges")) {
chip->gc.request = gpiochip_generic_request;
chip->gc.free = gpiochip_generic_free;
pl061->gc.request = gpiochip_generic_request;
pl061->gc.free = gpiochip_generic_free;
}
chip->gc.get_direction = pl061_get_direction;
chip->gc.direction_input = pl061_direction_input;
chip->gc.direction_output = pl061_direction_output;
chip->gc.get = pl061_get_value;
chip->gc.set = pl061_set_value;
chip->gc.ngpio = PL061_GPIO_NR;
chip->gc.label = dev_name(dev);
chip->gc.parent = dev;
chip->gc.owner = THIS_MODULE;
pl061->gc.base = -1;
pl061->gc.get_direction = pl061_get_direction;
pl061->gc.direction_input = pl061_direction_input;
pl061->gc.direction_output = pl061_direction_output;
pl061->gc.get = pl061_get_value;
pl061->gc.set = pl061_set_value;
pl061->gc.ngpio = PL061_GPIO_NR;
pl061->gc.label = dev_name(dev);
pl061->gc.parent = dev;
pl061->gc.owner = THIS_MODULE;
ret = gpiochip_add_data(&chip->gc, chip);
ret = gpiochip_add_data(&pl061->gc, pl061);
if (ret)
return ret;
/*
* irq_chip support
*/
writeb(0, chip->base + GPIOIE); /* disable irqs */
writeb(0, pl061->base + GPIOIE); /* disable irqs */
irq = adev->irq[0];
if (irq < 0) {
dev_err(&adev->dev, "invalid IRQ\n");
return -ENODEV;
}
pl061->parent_irq = irq;
ret = gpiochip_irqchip_add(&chip->gc, &pl061_irqchip,
irq_base, handle_bad_irq,
ret = gpiochip_irqchip_add(&pl061->gc, &pl061_irqchip,
0, handle_bad_irq,
IRQ_TYPE_NONE);
if (ret) {
dev_info(&adev->dev, "could not add irqchip\n");
return ret;
}
gpiochip_set_chained_irqchip(&chip->gc, &pl061_irqchip,
gpiochip_set_chained_irqchip(&pl061->gc, &pl061_irqchip,
irq, pl061_irq_handler);
for (i = 0; i < PL061_GPIO_NR; i++) {
if (pdata) {
if (pdata->directions & (BIT(i)))
pl061_direction_output(&chip->gc, i,
pdata->values & (BIT(i)));
else
pl061_direction_input(&chip->gc, i);
}
}
amba_set_drvdata(adev, chip);
amba_set_drvdata(adev, pl061);
dev_info(&adev->dev, "PL061 GPIO chip @%pa registered\n",
&adev->res.start);
@ -376,20 +356,20 @@ static int pl061_probe(struct amba_device *adev, const struct amba_id *id)
#ifdef CONFIG_PM
static int pl061_suspend(struct device *dev)
{
struct pl061_gpio *chip = dev_get_drvdata(dev);
struct pl061 *pl061 = dev_get_drvdata(dev);
int offset;
chip->csave_regs.gpio_data = 0;
chip->csave_regs.gpio_dir = readb(chip->base + GPIODIR);
chip->csave_regs.gpio_is = readb(chip->base + GPIOIS);
chip->csave_regs.gpio_ibe = readb(chip->base + GPIOIBE);
chip->csave_regs.gpio_iev = readb(chip->base + GPIOIEV);
chip->csave_regs.gpio_ie = readb(chip->base + GPIOIE);
pl061->csave_regs.gpio_data = 0;
pl061->csave_regs.gpio_dir = readb(pl061->base + GPIODIR);
pl061->csave_regs.gpio_is = readb(pl061->base + GPIOIS);
pl061->csave_regs.gpio_ibe = readb(pl061->base + GPIOIBE);
pl061->csave_regs.gpio_iev = readb(pl061->base + GPIOIEV);
pl061->csave_regs.gpio_ie = readb(pl061->base + GPIOIE);
for (offset = 0; offset < PL061_GPIO_NR; offset++) {
if (chip->csave_regs.gpio_dir & (BIT(offset)))
chip->csave_regs.gpio_data |=
pl061_get_value(&chip->gc, offset) << offset;
if (pl061->csave_regs.gpio_dir & (BIT(offset)))
pl061->csave_regs.gpio_data |=
pl061_get_value(&pl061->gc, offset) << offset;
}
return 0;
@ -397,22 +377,22 @@ static int pl061_suspend(struct device *dev)
static int pl061_resume(struct device *dev)
{
struct pl061_gpio *chip = dev_get_drvdata(dev);
struct pl061 *pl061 = dev_get_drvdata(dev);
int offset;
for (offset = 0; offset < PL061_GPIO_NR; offset++) {
if (chip->csave_regs.gpio_dir & (BIT(offset)))
pl061_direction_output(&chip->gc, offset,
chip->csave_regs.gpio_data &
if (pl061->csave_regs.gpio_dir & (BIT(offset)))
pl061_direction_output(&pl061->gc, offset,
pl061->csave_regs.gpio_data &
(BIT(offset)));
else
pl061_direction_input(&chip->gc, offset);
pl061_direction_input(&pl061->gc, offset);
}
writeb(chip->csave_regs.gpio_is, chip->base + GPIOIS);
writeb(chip->csave_regs.gpio_ibe, chip->base + GPIOIBE);
writeb(chip->csave_regs.gpio_iev, chip->base + GPIOIEV);
writeb(chip->csave_regs.gpio_ie, chip->base + GPIOIE);
writeb(pl061->csave_regs.gpio_is, pl061->base + GPIOIS);
writeb(pl061->csave_regs.gpio_ibe, pl061->base + GPIOIBE);
writeb(pl061->csave_regs.gpio_iev, pl061->base + GPIOIEV);
writeb(pl061->csave_regs.gpio_ie, pl061->base + GPIOIE);
return 0;
}

16
include/linux/amba/pl061.h
View File

@ -1,16 +0,0 @@
#include <linux/types.h>
/* platform data for the PL061 GPIO driver */
struct pl061_platform_data {
/* number of the first GPIO */
unsigned gpio_base;
/* number of the first IRQ.
* If the IRQ functionality in not desired this must be set to 0.
*/
unsigned irq_base;
u8 directions; /* startup directions, 1: out, 0: in */
u8 values; /* startup values */
};