Skip to content

Commit

Permalink
gpio: Convert tps65910 to a platform driver
Browse files Browse the repository at this point in the history 
Make the gpio-tps65910 as platform driver and register
this from tps65910 core driver as mfd sub device.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
  • Loading branch information
Laxman Dewangan authored and Samuel Ortiz committed May 20, 2012
1 parent aa4603a commit 10bbc48
Showing 1 changed file with 102 additions and 38 deletions.
140 changes: 102 additions & 38 deletions drivers/gpio/gpio-tps65910.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -18,11 +18,23 @@
#include <linux/errno.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/mfd/tps65910.h>

struct tps65910_gpio {
struct gpio_chip gpio_chip;
struct tps65910 *tps65910;
};

static inline struct tps65910_gpio *to_tps65910_gpio(struct gpio_chip *chip)
{
return container_of(chip, struct tps65910_gpio, gpio_chip);
}

static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset)
{
struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc);
struct tps65910 *tps65910 = tps65910_gpio->tps65910;
unsigned int val;

tps65910_reg_read(tps65910, TPS65910_GPIO0 + offset, &val);
Expand All @@ -36,7 +48,8 @@ static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset)
static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset,
int value)
{
struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc);
struct tps65910 *tps65910 = tps65910_gpio->tps65910;

if (value)
tps65910_reg_set_bits(tps65910, TPS65910_GPIO0 + offset,
Expand All @@ -49,7 +62,8 @@ static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset,
static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset,
int value)
{
struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc);
struct tps65910 *tps65910 = tps65910_gpio->tps65910;

/* Set the initial value */
tps65910_gpio_set(gc, offset, value);
Expand All @@ -60,59 +74,109 @@ static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset,

static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset)
{
struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc);
struct tps65910 *tps65910 = tps65910_gpio->tps65910;

return tps65910_reg_clear_bits(tps65910, TPS65910_GPIO0 + offset,
GPIO_CFG_MASK);
}

void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base)
static int __devinit tps65910_gpio_probe(struct platform_device *pdev)
{
struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent);
struct tps65910_board *pdata = dev_get_platdata(tps65910->dev);
struct tps65910_gpio *tps65910_gpio;
int ret;
struct tps65910_board *board_data;
int i;

tps65910_gpio = devm_kzalloc(&pdev->dev,
sizeof(*tps65910_gpio), GFP_KERNEL);
if (!tps65910_gpio) {
dev_err(&pdev->dev, "Could not allocate tps65910_gpio\n");
return -ENOMEM;
}

if (!gpio_base)
return;
tps65910_gpio->tps65910 = tps65910;

tps65910->gpio.owner = THIS_MODULE;
tps65910->gpio.label = tps65910->i2c_client->name;
tps65910->gpio.dev = tps65910->dev;
tps65910->gpio.base = gpio_base;
tps65910_gpio->gpio_chip.owner = THIS_MODULE;
tps65910_gpio->gpio_chip.label = tps65910->i2c_client->name;

switch(tps65910_chip_id(tps65910)) {
case TPS65910:
tps65910->gpio.ngpio = TPS65910_NUM_GPIO;
tps65910_gpio->gpio_chip.ngpio = TPS65910_NUM_GPIO;
break;
case TPS65911:
tps65910->gpio.ngpio = TPS65911_NUM_GPIO;
tps65910_gpio->gpio_chip.ngpio = TPS65911_NUM_GPIO;
break;
default:
return;
return -EINVAL;
}
tps65910->gpio.can_sleep = 1;

tps65910->gpio.direction_input = tps65910_gpio_input;
tps65910->gpio.direction_output = tps65910_gpio_output;
tps65910->gpio.set = tps65910_gpio_set;
tps65910->gpio.get = tps65910_gpio_get;

/* Configure sleep control for gpios */
board_data = dev_get_platdata(tps65910->dev);
if (board_data) {
int i;
for (i = 0; i < tps65910->gpio.ngpio; ++i) {
if (board_data->en_gpio_sleep[i]) {
ret = tps65910_reg_set_bits(tps65910,
TPS65910_GPIO0 + i, GPIO_SLEEP_MASK);
if (ret < 0)
dev_warn(tps65910->dev,
"GPIO Sleep setting failed\n");
}
}
tps65910_gpio->gpio_chip.can_sleep = 1;
tps65910_gpio->gpio_chip.direction_input = tps65910_gpio_input;
tps65910_gpio->gpio_chip.direction_output = tps65910_gpio_output;
tps65910_gpio->gpio_chip.set = tps65910_gpio_set;
tps65910_gpio->gpio_chip.get = tps65910_gpio_get;
tps65910_gpio->gpio_chip.dev = &pdev->dev;
if (pdata && pdata->gpio_base)
tps65910_gpio->gpio_chip.base = pdata->gpio_base;
else
tps65910_gpio->gpio_chip.base = -1;

if (!pdata)
goto skip_init;

/* Configure sleep control for gpios if provided */
for (i = 0; i < tps65910_gpio->gpio_chip.ngpio; ++i) {
if (!pdata->en_gpio_sleep[i])
continue;

ret = tps65910_reg_set_bits(tps65910,
TPS65910_GPIO0 + i, GPIO_SLEEP_MASK);
if (ret < 0)
dev_warn(tps65910->dev,
"GPIO Sleep setting failed with err %d\n", ret);
}

skip_init:
ret = gpiochip_add(&tps65910_gpio->gpio_chip);
if (ret < 0) {
dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
return ret;
}

ret = gpiochip_add(&tps65910->gpio);
platform_set_drvdata(pdev, tps65910_gpio);

if (ret)
dev_warn(tps65910->dev, "GPIO registration failed: %d\n", ret);
return ret;
}

static int __devexit tps65910_gpio_remove(struct platform_device *pdev)
{
struct tps65910_gpio *tps65910_gpio = platform_get_drvdata(pdev);

return gpiochip_remove(&tps65910_gpio->gpio_chip);
}

static struct platform_driver tps65910_gpio_driver = {
.driver.name = "tps65910-gpio",
.driver.owner = THIS_MODULE,
.probe = tps65910_gpio_probe,
.remove = __devexit_p(tps65910_gpio_remove),
};

static int __init tps65910_gpio_init(void)
{
return platform_driver_register(&tps65910_gpio_driver);
}
subsys_initcall(tps65910_gpio_init);

static void __exit tps65910_gpio_exit(void)
{
platform_driver_unregister(&tps65910_gpio_driver);
}
module_exit(tps65910_gpio_exit);

MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
MODULE_AUTHOR("Jorge Eduardo Candelaria jedu@slimlogic.co.uk>");
MODULE_DESCRIPTION("GPIO interface for TPS65910/TPS6511 PMICs");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:tps65910-gpio");

0 comments on commit 10bbc48

Please sign in to comment.