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authorLaxman Dewangan <ldewangan@nvidia.com>2012-05-11 21:48:27 +0530
committerSimone Willett <swillett@nvidia.com>2012-06-04 14:21:26 -0700
commitc9f9f32995b99df37f804577d7b6f565ce882253 (patch)
treeae397cbcf8cad82af9a7af198185ae248b5dadcd /drivers
parent2dbbe1fe96871cffbc1b734b67d54385eb522ff8 (diff)
gpio: Convert tps65910 to a platform driver
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> (cherry picked from commit 10bbc48d7a045c022a54f637c0c6b72f0e38b519) Change-Id: Ib9419107acdaaa95052cc0fbe2efffb22c85e68d Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/105928 Reviewed-by: Automatic_Commit_Validation_User GVS: Gerrit_Virtual_Submit
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpio/gpio-tps65910.c140
1 files changed, 102 insertions, 38 deletions
diff --git a/drivers/gpio/gpio-tps65910.c b/drivers/gpio/gpio-tps65910.c
index bc155f2509ba..af6dc837ffca 100644
--- a/drivers/gpio/gpio-tps65910.c
+++ b/drivers/gpio/gpio-tps65910.c
@@ -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);
@@ -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,
@@ -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);
@@ -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");