[PATCH v2 5/6] gpio: pca953x: Make platform teardown callback return void

Uwe Kleine-König
2022-08-15T08:03:08Z

All platforms that provide a teardown callback return 0. New users are
supposed to not make use of platform support, so there is no
functionality lost.

This patch is a preparation for making i2c remove callbacks return void.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
arch/arm/mach-davinci/board-da850-evm.c | 12 ++++--------
drivers/gpio/gpio-pca953x.c | 11 +++--------
include/linux/platform_data/pca953x.h | 2 +-
3 files changed, 8 insertions(+), 17 deletions(-)

diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index 92d74bc71967..d752ee2b30ff 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -516,8 +516,8 @@ static int da850_evm_ui_expander_setup(struct i2c_client *client, unsigned gpio,
return ret;
}

-static int da850_evm_ui_expander_teardown(struct i2c_client *client,
- unsigned gpio, unsigned ngpio, void *c)
+static void da850_evm_ui_expander_teardown(struct i2c_client *client,
+ unsigned gpio, unsigned ngpio, void *c)
{
platform_device_unregister(&da850_evm_ui_keys_device);

@@ -529,8 +529,6 @@ static int da850_evm_ui_expander_teardown(struct i2c_client *client,
gpio_free(gpio + DA850_EVM_UI_EXP_SEL_C);
gpio_free(gpio + DA850_EVM_UI_EXP_SEL_B);
gpio_free(gpio + DA850_EVM_UI_EXP_SEL_A);
-
- return 0;
}

/* assign the baseboard expander's GPIOs after the UI board's */
@@ -697,13 +695,11 @@ static int da850_evm_bb_expander_setup(struct i2c_client *client,
return ret;
}

-static int da850_evm_bb_expander_teardown(struct i2c_client *client,
- unsigned gpio, unsigned ngpio, void *c)
+static void da850_evm_bb_expander_teardown(struct i2c_client *client,
+ unsigned gpio, unsigned ngpio, void *c)
{
platform_device_unregister(&da850_evm_bb_leds_device);
platform_device_unregister(&da850_evm_bb_keys_device);
-
- return 0;
}

static struct pca953x_platform_data da850_evm_ui_expander_info = {
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index ecd7d169470b..1860e566eb94 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -1105,20 +1105,15 @@ static int pca953x_remove(struct i2c_client *client)
{
struct pca953x_platform_data *pdata = dev_get_platdata(&client->dev);
struct pca953x_chip *chip = i2c_get_clientdata(client);
- int ret;

if (pdata && pdata->teardown) {
- ret = pdata->teardown(client, chip->gpio_chip.base,
- chip->gpio_chip.ngpio, pdata->context);
- if (ret < 0)
- dev_err(&client->dev, "teardown failed, %d\n", ret);
- } else {
- ret = 0;
+ pdata->teardown(client, chip->gpio_chip.base,
+ chip->gpio_chip.ngpio, pdata->context);
}

regulator_disable(chip->regulator);

- return ret;
+ return 0;
}

#ifdef CONFIG_PM_SLEEP
diff --git a/include/linux/platform_data/pca953x.h b/include/linux/platform_data/pca953x.h
index 4eb53e023997..96c1a14ab365 100644
--- a/include/linux/platform_data/pca953x.h
+++ b/include/linux/platform_data/pca953x.h
@@ -22,7 +22,7 @@ struct pca953x_platform_data {
int (*setup)(struct i2c_client *client,
unsigned gpio, unsigned ngpio,
void *context);
- int (*teardown)(struct i2c_client *client,
+ void (*teardown)(struct i2c_client *client,
unsigned gpio, unsigned ngpio,
void *context);
const char *const *names;
--
2.36.1