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58cf279aca
linux/drivers/mfd/tps65010.c
Linus Torvalds 58cf279aca GPIO bulk updates for the v4.5 kernel cycle: 
Infrastructural changes:
 
 - In struct gpio_chip, rename the .dev node to .parent to better reflect
   the fact that this is not the GPIO struct device abstraction. We will
   add that soon so this would be totallt confusing.
 
 - It was noted that the driver .get_value() callbacks was
   sometimes reporting negative -ERR values to the gpiolib core, expecting
   them to be propagated to consumer gpiod_get_value() and gpio_get_value()
   calls. This was not happening, so as there was a mess of drivers
   returning negative errors and some returning "anything else than zero"
   to indicate that a line was active. As some would have bit 31 set to
   indicate "line active" it clashed with negative error codes. This is
   fixed by the largeish series clamping values in all drivers with
   !!value to [0,1] and then augmenting the code to propagate error codes
   to consumers. (Includes some ACKed patches in other subsystems.)
 
 - Add a void *data pointer to struct gpio_chip. The container_of() design
   pattern is indeed very nice, but we want to reform the struct gpio_chip
   to be a non-volative, stateless business, and keep states internal to
   the gpiolib to be able to hold on to the state when adding a proper
   userspace ABI (character device) further down the road. To achieve this,
   drivers need a handle at the internal state that is not dependent on
   their struct gpio_chip() so we add gpiochip_add_data() and
   gpiochip_get_data() following the pattern of many other subsystems.
   All the "use gpiochip data pointer" patches transforms drivers to this
   scheme.
 
 - The Generic GPIO chip header has been merged into the general
   <linux/gpio/driver.h> header, and the custom header for that removed.
   Instead of having a separate mm_gpio_chip struct for these generic
   drivers, merge that into struct gpio_chip, simplifying the code and
   removing the need for separate and confusing includes.
 
 Misc improvements:
 
 - Stabilize the way GPIOs are looked up from the ACPI legacy
   specification.
 
 - Incremental driver features for PXA, PCA953X, Lantiq (patches from the
   OpenWRT community), RCAR, Zynq, PL061, 104-idi-48
 
 New drivers:
 
 - Add a GPIO chip to the ALSA SoC AC97 driver.
 
 - Add a new Broadcom NSP SoC driver (this lands in the pinctrl dir, but
   the branch is merged here too to account for infrastructural changes).
 
 - The sx150x driver now supports the sx1502.
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Merge tag 'gpio-v4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "Here is the bulk of GPIO changes for v4.5.

  Notably there are big refactorings mostly by myself, aimed at getting
  the gpio_chip into a shape that makes me believe I can proceed to
  preserve state for a proper userspace ABI (character device) that has
  already been proposed once, but resulted in the feedback that I need
  to go back and restructure stuff.  So I've been restructuring stuff.
  On the way I ran into brokenness (return code from the get_value()
  callback) and had to fix it.  Also, refactored generic GPIO to be
  simpler.

  Some of that is still waiting to trickle down from the subsystems all
  over the kernel that provide random gpio_chips, I've touched every
  single GPIO driver in the kernel now, oh man I didn't know I was
  responsible for so much...

  Apart from that we're churning along as usual.

  I took some effort to test and retest so it should merge nicely and we
  shook out a couple of bugs in -next.

  Infrastructural changes:

   - In struct gpio_chip, rename the .dev node to .parent to better
     reflect the fact that this is not the GPIO struct device
     abstraction.  We will add that soon so this would be totallt
     confusing.

   - It was noted that the driver .get_value() callbacks was sometimes
     reporting negative -ERR values to the gpiolib core, expecting them
     to be propagated to consumer gpiod_get_value() and gpio_get_value()
     calls.  This was not happening, so as there was a mess of drivers
     returning negative errors and some returning "anything else than
     zero" to indicate that a line was active.  As some would have bit
     31 set to indicate "line active" it clashed with negative error
     codes.  This is fixed by the largeish series clamping values in all
     drivers with !!value to [0,1] and then augmenting the code to
     propagate error codes to consumers.  (Includes some ACKed patches
     in other subsystems.)

   - Add a void *data pointer to struct gpio_chip.  The container_of()
     design pattern is indeed very nice, but we want to reform the
     struct gpio_chip to be a non-volative, stateless business, and keep
     states internal to the gpiolib to be able to hold on to the state
     when adding a proper userspace ABI (character device) further down
     the road.  To achieve this, drivers need a handle at the internal
     state that is not dependent on their struct gpio_chip() so we add
     gpiochip_add_data() and gpiochip_get_data() following the pattern
     of many other subsystems.  All the "use gpiochip data pointer"
     patches transforms drivers to this scheme.

   - The Generic GPIO chip header has been merged into the general
     <linux/gpio/driver.h> header, and the custom header for that
     removed.  Instead of having a separate mm_gpio_chip struct for
     these generic drivers, merge that into struct gpio_chip,
     simplifying the code and removing the need for separate and
     confusing includes.

  Misc improvements:

   - Stabilize the way GPIOs are looked up from the ACPI legacy
     specification.

   - Incremental driver features for PXA, PCA953X, Lantiq (patches from
     the OpenWRT community), RCAR, Zynq, PL061, 104-idi-48

  New drivers:

   - Add a GPIO chip to the ALSA SoC AC97 driver.

   - Add a new Broadcom NSP SoC driver (this lands in the pinctrl dir,
     but the branch is merged here too to account for infrastructural
     changes).

   - The sx150x driver now supports the sx1502"

* tag 'gpio-v4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (220 commits)
  gpio: generic: make bgpio_pdata always visible
  gpiolib: fix chip order in gpio list
  gpio: mpc8xxx: Do not use gpiochip_get_data() in mpc8xxx_gpio_save_regs()
  gpio: mm-lantiq: Do not use gpiochip_get_data() in ltq_mm_save_regs()
  gpio: brcmstb: Allow building driver for BMIPS_GENERIC
  gpio: brcmstb: Set endian flags for big-endian MIPS
  gpio: moxart: fix build regression
  gpio: xilinx: Do not use gpiochip_get_data() in xgpio_save_regs()
  leds: pca9532: use gpiochip data pointer
  leds: tca6507: use gpiochip data pointer
  hid: cp2112: use gpiochip data pointer
  bcma: gpio: use gpiochip data pointer
  avr32: gpio: use gpiochip data pointer
  video: fbdev: via: use gpiochip data pointer
  gpio: pch: Optimize pch_gpio_get()
  Revert "pinctrl: lantiq: Implement gpio_chip.to_irq"
  pinctrl: nsp-gpio: use gpiochip data pointer
  pinctrl: vt8500-wmt: use gpiochip data pointer
  pinctrl: exynos5440: use gpiochip data pointer
  pinctrl: at91-pio4: use gpiochip data pointer
  ...
2016-01-17 12:32:01 -08:00

1096 lines
28 KiB
C
Raw Blame History

/*
* tps65010 - driver for tps6501x power management chips
*
* Copyright (C) 2004 Texas Instruments
* Copyright (C) 2004-2005 David Brownell
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/i2c/tps65010.h>
#include <linux/gpio.h>
/*-------------------------------------------------------------------------*/
#define DRIVER_VERSION "2 May 2005"
#define DRIVER_NAME (tps65010_driver.driver.name)
MODULE_DESCRIPTION("TPS6501x Power Management Driver");
MODULE_LICENSE("GPL");
static struct i2c_driver tps65010_driver;
/*-------------------------------------------------------------------------*/
/* This driver handles a family of multipurpose chips, which incorporate
* voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
* and other features often needed in portable devices like cell phones
* or digital cameras.
*
* The tps65011 and tps65013 have different voltage settings compared
* to tps65010 and tps65012. The tps65013 has a NO_CHG status/irq.
* All except tps65010 have "wait" mode, possibly defaulted so that
* battery-insert != device-on.
*
* We could distinguish between some models by checking VDCDC1.UVLO or
* other registers, unless they've been changed already after powerup
* as part of board setup by a bootloader.
*/
enum tps_model {
TPS65010,
TPS65011,
TPS65012,
TPS65013,
};
struct tps65010 {
struct i2c_client *client;
struct mutex lock;
struct delayed_work work;
struct dentry *file;
unsigned charging:1;
unsigned por:1;
unsigned model:8;
u16 vbus;
unsigned long flags;
#define FLAG_VBUS_CHANGED 0
#define FLAG_IRQ_ENABLE 1
/* copies of last register state */
u8 chgstatus, regstatus, chgconf;
u8 nmask1, nmask2;
u8 outmask;
struct gpio_chip chip;
struct platform_device *leds;
};
#define POWER_POLL_DELAY msecs_to_jiffies(5000)
/*-------------------------------------------------------------------------*/
#if defined(DEBUG) || defined(CONFIG_DEBUG_FS)
static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
{
snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
chgstatus,
(chgstatus & TPS_CHG_USB) ? " USB" : "",
(chgstatus & TPS_CHG_AC) ? " AC" : "",
(chgstatus & TPS_CHG_THERM) ? " therm" : "",
(chgstatus & TPS_CHG_TERM) ? " done" :
((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
? " (charging)" : ""),
(chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
(chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
(chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
(chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
}
static void dbg_regstat(char *buf, size_t len, u8 regstatus)
{
snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
regstatus,
(regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
(regstatus & TPS_REG_COVER) ? " uncover" : "",
(regstatus & TPS_REG_UVLO) ? " UVLO" : "",
(regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
(regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
(regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
(regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
(regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
}
static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
{
const char *hibit;
if (por)
hibit = (chgconfig & TPS_CHARGE_POR)
? "POR=69ms" : "POR=1sec";
else
hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
chgconfig, hibit,
(chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
(chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
({int p; switch ((chgconfig >> 3) & 3) {
case 3: p = 100; break;
case 2: p = 75; break;
case 1: p = 50; break;
default: p = 25; break;
}; p; }),
(chgconfig & TPS_VBUS_CHARGING)
? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
: 0,
(chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
}
#endif
#ifdef DEBUG
static void show_chgstatus(const char *label, u8 chgstatus)
{
char buf [100];
dbg_chgstat(buf, sizeof buf, chgstatus);
pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
}
static void show_regstatus(const char *label, u8 regstatus)
{
char buf [100];
dbg_regstat(buf, sizeof buf, regstatus);
pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
}
static void show_chgconfig(int por, const char *label, u8 chgconfig)
{
char buf [100];
dbg_chgconf(por, buf, sizeof buf, chgconfig);
pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
}
#else
static inline void show_chgstatus(const char *label, u8 chgstatus) { }
static inline void show_regstatus(const char *label, u8 chgstatus) { }
static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
#endif
#ifdef CONFIG_DEBUG_FS
static int dbg_show(struct seq_file *s, void *_)
{
struct tps65010 *tps = s->private;
u8 value, v2;
unsigned i;
char buf[100];
const char *chip;
switch (tps->model) {
case TPS65010: chip = "tps65010"; break;
case TPS65011: chip = "tps65011"; break;
case TPS65012: chip = "tps65012"; break;
case TPS65013: chip = "tps65013"; break;
default: chip = NULL; break;
}
seq_printf(s, "driver %s\nversion %s\nchip %s\n\n",
DRIVER_NAME, DRIVER_VERSION, chip);
mutex_lock(&tps->lock);
/* FIXME how can we tell whether a battery is present?
* likely involves a charge gauging chip (like BQ26501).
*/
seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
/* registers for monitoring battery charging and status; note
* that reading chgstat and regstat may ack IRQs...
*/
value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
dbg_chgconf(tps->por, buf, sizeof buf, value);
seq_printf(s, "chgconfig %s", buf);
value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
dbg_chgstat(buf, sizeof buf, value);
seq_printf(s, "chgstat %s", buf);
value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1);
dbg_chgstat(buf, sizeof buf, value);
seq_printf(s, "mask1 %s", buf);
/* ignore ackint1 */
value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
dbg_regstat(buf, sizeof buf, value);
seq_printf(s, "regstat %s", buf);
value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2);
dbg_regstat(buf, sizeof buf, value);
seq_printf(s, "mask2 %s\n", buf);
/* ignore ackint2 */
queue_delayed_work(system_power_efficient_wq, &tps->work,
POWER_POLL_DELAY);
/* VMAIN voltage, enable lowpower, etc */
value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1);
seq_printf(s, "vdcdc1 %02x\n", value);
/* VCORE voltage, vibrator on/off */
value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2);
seq_printf(s, "vdcdc2 %02x\n", value);
/* both LD0s, and their lowpower behavior */
value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1);
seq_printf(s, "vregs1 %02x\n\n", value);
/* LEDs and GPIOs */
value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON);
v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER);
seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
(value & 0x80)
? ((v2 & 0x80) ? "on" : "off")
: ((v2 & 0x80) ? "blink" : "(nPG)"),
value, v2,
(value & 0x7f) * 10, (v2 & 0x7f) * 100);
value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON);
v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER);
seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
(value & 0x80)
? ((v2 & 0x80) ? "on" : "off")
: ((v2 & 0x80) ? "blink" : "off"),
value, v2,
(value & 0x7f) * 10, (v2 & 0x7f) * 100);
value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3);
seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
for (i = 0; i < 4; i++) {
if (value & (1 << (4 + i)))
seq_printf(s, " gpio%d-out %s\n", i + 1,
(value & (1 << i)) ? "low" : "hi ");
else
seq_printf(s, " gpio%d-in %s %s %s\n", i + 1,
(value & (1 << i)) ? "hi " : "low",
(v2 & (1 << i)) ? "no-irq" : "irq",
(v2 & (1 << (4 + i))) ? "rising" : "falling");
}
mutex_unlock(&tps->lock);
return 0;
}
static int dbg_tps_open(struct inode *inode, struct file *file)
{
return single_open(file, dbg_show, inode->i_private);
}
static const struct file_operations debug_fops = {
.open = dbg_tps_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
#define DEBUG_FOPS &debug_fops
#else
#define DEBUG_FOPS NULL
#endif
/*-------------------------------------------------------------------------*/
/* handle IRQS in a task context, so we can use I2C calls */
static void tps65010_interrupt(struct tps65010 *tps)
{
u8 tmp = 0, mask, poll;
/* IRQs won't trigger for certain events, but we can get
* others by polling (normally, with external power applied).
*/
poll = 0;
/* regstatus irqs */
if (tps->nmask2) {
tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
mask = tmp ^ tps->regstatus;
tps->regstatus = tmp;
mask &= tps->nmask2;
} else
mask = 0;
if (mask) {
tps->regstatus = tmp;
/* may need to shut something down ... */
/* "off" usually means deep sleep */
if (tmp & TPS_REG_ONOFF) {
pr_info("%s: power off button\n", DRIVER_NAME);
#if 0
/* REVISIT: this might need its own workqueue
* plus tweaks including deadlock avoidance ...
* also needs to get error handling and probably
* an #ifdef CONFIG_HIBERNATION
*/
hibernate();
#endif
poll = 1;
}
}
/* chgstatus irqs */
if (tps->nmask1) {
tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
mask = tmp ^ tps->chgstatus;
tps->chgstatus = tmp;
mask &= tps->nmask1;
} else
mask = 0;
if (mask) {
unsigned charging = 0;
show_chgstatus("chg/irq", tmp);
if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
show_chgconfig(tps->por, "conf", tps->chgconf);
/* Unless it was turned off or disabled, we charge any
* battery whenever there's power available for it
* and the charger hasn't been disabled.
*/
if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
&& (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
&& (tps->chgconf & TPS_CHARGE_ENABLE)
) {
if (tps->chgstatus & TPS_CHG_USB) {
/* VBUS options are readonly until reconnect */
if (mask & TPS_CHG_USB)
set_bit(FLAG_VBUS_CHANGED, &tps->flags);
charging = 1;
} else if (tps->chgstatus & TPS_CHG_AC)
charging = 1;
}
if (charging != tps->charging) {
tps->charging = charging;
pr_info("%s: battery %scharging\n",
DRIVER_NAME, charging ? "" :
((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
? "NOT " : "dis"));
}
}
/* always poll to detect (a) power removal, without tps65013
* NO_CHG IRQ; or (b) restart of charging after stop.
*/
if ((tps->model != TPS65013 || !tps->charging)
&& (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
poll = 1;
if (poll)
queue_delayed_work(system_power_efficient_wq, &tps->work,
POWER_POLL_DELAY);
/* also potentially gpio-in rise or fall */
}
/* handle IRQs and polling using keventd for now */
static void tps65010_work(struct work_struct *work)
{
struct tps65010 *tps;
tps = container_of(to_delayed_work(work), struct tps65010, work);
mutex_lock(&tps->lock);
tps65010_interrupt(tps);
if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
int status;
u8 chgconfig, tmp;
chgconfig = i2c_smbus_read_byte_data(tps->client,
TPS_CHGCONFIG);
chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
if (tps->vbus == 500)
chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
else if (tps->vbus >= 100)
chgconfig |= TPS_VBUS_CHARGING;
status = i2c_smbus_write_byte_data(tps->client,
TPS_CHGCONFIG, chgconfig);
/* vbus update fails unless VBUS is connected! */
tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
tps->chgconf = tmp;
show_chgconfig(tps->por, "update vbus", tmp);
}
if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
enable_irq(tps->client->irq);
mutex_unlock(&tps->lock);
}
static irqreturn_t tps65010_irq(int irq, void *_tps)
{
struct tps65010 *tps = _tps;
disable_irq_nosync(irq);
set_bit(FLAG_IRQ_ENABLE, &tps->flags);
queue_delayed_work(system_power_efficient_wq, &tps->work, 0);
return IRQ_HANDLED;
}
/*-------------------------------------------------------------------------*/
/* offsets 0..3 == GPIO1..GPIO4
* offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes)
* offset 6 == vibrator motor driver
*/
static void
tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
if (offset < 4)
tps65010_set_gpio_out_value(offset + 1, value);
else if (offset < 6)
tps65010_set_led(offset - 3, value ? ON : OFF);
else
tps65010_set_vib(value);
}
static int
tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
{
/* GPIOs may be input-only */
if (offset < 4) {
struct tps65010 *tps;
tps = container_of(chip, struct tps65010, chip);
if (!(tps->outmask & (1 << offset)))
return -EINVAL;
tps65010_set_gpio_out_value(offset + 1, value);
} else if (offset < 6)
tps65010_set_led(offset - 3, value ? ON : OFF);
else
tps65010_set_vib(value);
return 0;
}
static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset)
{
int value;
struct tps65010 *tps;
tps = container_of(chip, struct tps65010, chip);
if (offset < 4) {
value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
if (value < 0)
return value;
if (value & (1 << (offset + 4))) /* output */
return !(value & (1 << offset));
else /* input */
return !!(value & (1 << offset));
}
/* REVISIT we *could* report LED1/nPG and LED2 state ... */
return 0;
}
/*-------------------------------------------------------------------------*/
static struct tps65010 *the_tps;
static int tps65010_remove(struct i2c_client *client)
{
struct tps65010 *tps = i2c_get_clientdata(client);
struct tps65010_board *board = dev_get_platdata(&client->dev);
if (board && board->teardown) {
int status = board->teardown(client, board->context);
if (status < 0)
dev_dbg(&client->dev, "board %s %s err %d\n",
"teardown", client->name, status);
}
if (client->irq > 0)
free_irq(client->irq, tps);
cancel_delayed_work_sync(&tps->work);
debugfs_remove(tps->file);
the_tps = NULL;
return 0;
}
static int tps65010_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct tps65010 *tps;
int status;
struct tps65010_board *board = dev_get_platdata(&client->dev);
if (the_tps) {
dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
return -ENODEV;
}
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -EINVAL;
tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
if (!tps)
return -ENOMEM;
mutex_init(&tps->lock);
INIT_DELAYED_WORK(&tps->work, tps65010_work);
tps->client = client;
tps->model = id->driver_data;
/* the IRQ is active low, but many gpio lines can't support that
* so this driver uses falling-edge triggers instead.
*/
if (client->irq > 0) {
status = request_irq(client->irq, tps65010_irq,
IRQF_TRIGGER_FALLING, DRIVER_NAME, tps);
if (status < 0) {
dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
client->irq, status);
return status;
}
/* annoying race here, ideally we'd have an option
* to claim the irq now and enable it later.
* FIXME genirq IRQF_NOAUTOEN now solves that ...
*/
disable_irq(client->irq);
set_bit(FLAG_IRQ_ENABLE, &tps->flags);
} else
dev_warn(&client->dev, "IRQ not configured!\n");
switch (tps->model) {
case TPS65010:
case TPS65012:
tps->por = 1;
break;
/* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
}
tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
show_chgconfig(tps->por, "conf/init", tps->chgconf);
show_chgstatus("chg/init",
i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
show_regstatus("reg/init",
i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
i2c_smbus_read_byte_data(client, TPS_VDCDC1),
i2c_smbus_read_byte_data(client, TPS_VDCDC2),
i2c_smbus_read_byte_data(client, TPS_VREGS1));
pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
i2c_smbus_read_byte_data(client, TPS_MASK3));
i2c_set_clientdata(client, tps);
the_tps = tps;
#if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
/* USB hosts can't draw VBUS. OTG devices could, later
* when OTG infrastructure enables it. USB peripherals
* could be relying on VBUS while booting, though.
*/
tps->vbus = 100;
#endif
/* unmask the "interesting" irqs, then poll once to
* kickstart monitoring, initialize shadowed status
* registers, and maybe disable VBUS draw.
*/
tps->nmask1 = ~0;
(void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
tps->nmask2 = TPS_REG_ONOFF;
if (tps->model == TPS65013)
tps->nmask2 |= TPS_REG_NO_CHG;
(void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
(void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
| i2c_smbus_read_byte_data(client, TPS_MASK3));
tps65010_work(&tps->work.work);
tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
tps, DEBUG_FOPS);
/* optionally register GPIOs */
if (board && board->base != 0) {
tps->outmask = board->outmask;
tps->chip.label = client->name;
tps->chip.parent = &client->dev;
tps->chip.owner = THIS_MODULE;
tps->chip.set = tps65010_gpio_set;
tps->chip.direction_output = tps65010_output;
/* NOTE: only partial support for inputs; nyet IRQs */
tps->chip.get = tps65010_gpio_get;
tps->chip.base = board->base;
tps->chip.ngpio = 7;
tps->chip.can_sleep = 1;
status = gpiochip_add(&tps->chip);
if (status < 0)
dev_err(&client->dev, "can't add gpiochip, err %d\n",
status);
else if (board->setup) {
status = board->setup(client, board->context);
if (status < 0) {
dev_dbg(&client->dev,
"board %s %s err %d\n",
"setup", client->name, status);
status = 0;
}
}
}
return 0;
}
static const struct i2c_device_id tps65010_id[] = {
{ "tps65010", TPS65010 },
{ "tps65011", TPS65011 },
{ "tps65012", TPS65012 },
{ "tps65013", TPS65013 },
{ "tps65014", TPS65011 }, /* tps65011 charging at 6.5V max */
{ }
};
MODULE_DEVICE_TABLE(i2c, tps65010_id);
static struct i2c_driver tps65010_driver = {
.driver = {
.name = "tps65010",
},
.probe = tps65010_probe,
.remove = tps65010_remove,
.id_table = tps65010_id,
};
/*-------------------------------------------------------------------------*/
/* Draw from VBUS:
* 0 mA -- DON'T DRAW (might supply power instead)
* 100 mA -- usb unit load (slowest charge rate)
* 500 mA -- usb high power (fast battery charge)
*/
int tps65010_set_vbus_draw(unsigned mA)
{
unsigned long flags;
if (!the_tps)
return -ENODEV;
/* assumes non-SMP */
local_irq_save(flags);
if (mA >= 500)
mA = 500;
else if (mA >= 100)
mA = 100;
else
mA = 0;
the_tps->vbus = mA;
if ((the_tps->chgstatus & TPS_CHG_USB)
&& test_and_set_bit(
FLAG_VBUS_CHANGED, &the_tps->flags)) {
/* gadget drivers call this in_irq() */
queue_delayed_work(system_power_efficient_wq, &the_tps->work,
0);
}
local_irq_restore(flags);
return 0;
}
EXPORT_SYMBOL(tps65010_set_vbus_draw);
/*-------------------------------------------------------------------------*/
/* tps65010_set_gpio_out_value parameter:
* gpio: GPIO1, GPIO2, GPIO3 or GPIO4
* value: LOW or HIGH
*/
int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
{
int status;
unsigned defgpio;
if (!the_tps)
return -ENODEV;
if ((gpio < GPIO1) || (gpio > GPIO4))
return -EINVAL;
mutex_lock(&the_tps->lock);
defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
/* Configure GPIO for output */
defgpio |= 1 << (gpio + 3);
/* Writing 1 forces a logic 0 on that GPIO and vice versa */
switch (value) {
case LOW:
defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */
break;
/* case HIGH: */
default:
defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
break;
}
status = i2c_smbus_write_byte_data(the_tps->client,
TPS_DEFGPIO, defgpio);
pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
gpio, value ? "high" : "low",
i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
mutex_unlock(&the_tps->lock);
return status;
}
EXPORT_SYMBOL(tps65010_set_gpio_out_value);
/*-------------------------------------------------------------------------*/
/* tps65010_set_led parameter:
* led: LED1 or LED2
* mode: ON, OFF or BLINK
*/
int tps65010_set_led(unsigned led, unsigned mode)
{
int status;
unsigned led_on, led_per, offs;
if (!the_tps)
return -ENODEV;
if (led == LED1)
offs = 0;
else {
offs = 2;
led = LED2;
}
mutex_lock(&the_tps->lock);
pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
i2c_smbus_read_byte_data(the_tps->client,
TPS_LED1_ON + offs));
pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
i2c_smbus_read_byte_data(the_tps->client,
TPS_LED1_PER + offs));
switch (mode) {
case OFF:
led_on = 1 << 7;
led_per = 0 << 7;
break;
case ON:
led_on = 1 << 7;
led_per = 1 << 7;
break;
case BLINK:
led_on = 0x30 | (0 << 7);
led_per = 0x08 | (1 << 7);
break;
default:
printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
DRIVER_NAME);
mutex_unlock(&the_tps->lock);
return -EINVAL;
}
status = i2c_smbus_write_byte_data(the_tps->client,
TPS_LED1_ON + offs, led_on);
if (status != 0) {
printk(KERN_ERR "%s: Failed to write led%i_on register\n",
DRIVER_NAME, led);
mutex_unlock(&the_tps->lock);
return status;
}
pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
status = i2c_smbus_write_byte_data(the_tps->client,
TPS_LED1_PER + offs, led_per);
if (status != 0) {
printk(KERN_ERR "%s: Failed to write led%i_per register\n",
DRIVER_NAME, led);
mutex_unlock(&the_tps->lock);
return status;
}
pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
i2c_smbus_read_byte_data(the_tps->client,
TPS_LED1_PER + offs));
mutex_unlock(&the_tps->lock);
return status;
}
EXPORT_SYMBOL(tps65010_set_led);
/*-------------------------------------------------------------------------*/
/* tps65010_set_vib parameter:
* value: ON or OFF
*/
int tps65010_set_vib(unsigned value)
{
int status;
unsigned vdcdc2;
if (!the_tps)
return -ENODEV;
mutex_lock(&the_tps->lock);
vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
vdcdc2 &= ~(1 << 1);
if (value)
vdcdc2 |= (1 << 1);
status = i2c_smbus_write_byte_data(the_tps->client,
TPS_VDCDC2, vdcdc2);
pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
mutex_unlock(&the_tps->lock);
return status;
}
EXPORT_SYMBOL(tps65010_set_vib);
/*-------------------------------------------------------------------------*/
/* tps65010_set_low_pwr parameter:
* mode: ON or OFF
*/
int tps65010_set_low_pwr(unsigned mode)
{
int status;
unsigned vdcdc1;
if (!the_tps)
return -ENODEV;
mutex_lock(&the_tps->lock);
pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
mode ? "enable" : "disable",
i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
switch (mode) {
case OFF:
vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
break;
/* case ON: */
default:
vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
break;
}
status = i2c_smbus_write_byte_data(the_tps->client,
TPS_VDCDC1, vdcdc1);
if (status != 0)
printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
DRIVER_NAME);
else
pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
mutex_unlock(&the_tps->lock);
return status;
}
EXPORT_SYMBOL(tps65010_set_low_pwr);
/*-------------------------------------------------------------------------*/
/* tps65010_config_vregs1 parameter:
* value to be written to VREGS1 register
* Note: The complete register is written, set all bits you need
*/
int tps65010_config_vregs1(unsigned value)
{
int status;
if (!the_tps)
return -ENODEV;
mutex_lock(&the_tps->lock);
pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
status = i2c_smbus_write_byte_data(the_tps->client,
TPS_VREGS1, value);
if (status != 0)
printk(KERN_ERR "%s: Failed to write vregs1 register\n",
DRIVER_NAME);
else
pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
mutex_unlock(&the_tps->lock);
return status;
}
EXPORT_SYMBOL(tps65010_config_vregs1);
int tps65010_config_vdcdc2(unsigned value)
{
struct i2c_client *c;
int status;
if (!the_tps)
return -ENODEV;
c = the_tps->client;
mutex_lock(&the_tps->lock);
pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,
i2c_smbus_read_byte_data(c, TPS_VDCDC2));
status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);
if (status != 0)
printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",
DRIVER_NAME);
else
pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
i2c_smbus_read_byte_data(c, TPS_VDCDC2));
mutex_unlock(&the_tps->lock);
return status;
}
EXPORT_SYMBOL(tps65010_config_vdcdc2);
/*-------------------------------------------------------------------------*/
/* tps65013_set_low_pwr parameter:
* mode: ON or OFF
*/
/* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
required if power supply is through a battery */
int tps65013_set_low_pwr(unsigned mode)
{
int status;
unsigned vdcdc1, chgconfig;
if (!the_tps || the_tps->por)
return -ENODEV;
mutex_lock(&the_tps->lock);
pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
DRIVER_NAME,
mode ? "enable" : "disable",
i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
switch (mode) {
case OFF:
chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
break;
/* case ON: */
default:
chgconfig |= TPS65013_AUA; /* enable AUA bit */
vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
break;
}
status = i2c_smbus_write_byte_data(the_tps->client,
TPS_CHGCONFIG, chgconfig);
if (status != 0) {
printk(KERN_ERR "%s: Failed to write chconfig register\n",
DRIVER_NAME);
mutex_unlock(&the_tps->lock);
return status;
}
chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
the_tps->chgconf = chgconfig;
show_chgconfig(0, "chgconf", chgconfig);
status = i2c_smbus_write_byte_data(the_tps->client,
TPS_VDCDC1, vdcdc1);
if (status != 0)
printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
DRIVER_NAME);
else
pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
mutex_unlock(&the_tps->lock);
return status;
}
EXPORT_SYMBOL(tps65013_set_low_pwr);
/*-------------------------------------------------------------------------*/
static int __init tps_init(void)
{
u32 tries = 3;
int status = -ENODEV;
printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
/* some boards have startup glitches */
while (tries--) {
status = i2c_add_driver(&tps65010_driver);
if (the_tps)
break;
i2c_del_driver(&tps65010_driver);
if (!tries) {
printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
return -ENODEV;
}
pr_debug("%s: re-probe ...\n", DRIVER_NAME);
msleep(10);
}
return status;
}
/* NOTE: this MUST be initialized before the other parts of the system
* that rely on it ... but after the i2c bus on which this relies.
* That is, much earlier than on PC-type systems, which don't often use
* I2C as a core system bus.
*/
subsys_initcall(tps_init);
static void __exit tps_exit(void)
{
i2c_del_driver(&tps65010_driver);
}
module_exit(tps_exit);
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