[PATCH v4 02/13] gpiolib: have a single place of calling set_config()

Bartosz Golaszewski
2019-12-24T12:07:28Z

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Instead of calling the gpiochip's set_config() callback directly and
checking its existence every time - just add a new routine that performs
this check internally. Call it in gpio_set_config() and
gpiod_set_transitory(). Also call it in gpiod_set_debounce() and drop
the check for chip->set() as it's irrelevant to this config option.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
---
drivers/gpio/gpiolib.c | 21 ++++++++++++---------
1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index e5d101ee9ada..616e431039fc 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -3042,6 +3042,15 @@ EXPORT_SYMBOL_GPL(gpiochip_free_own_desc);
* rely on gpio_request() having been called beforehand.
*/

+static int gpio_do_set_config(struct gpio_chip *gc, unsigned int offset,
+ enum pin_config_param mode)
+{
+ if (!gc->set_config)
+ return -ENOTSUPP;
+
+ return gc->set_config(gc, offset, mode);
+}
+
static int gpio_set_config(struct gpio_chip *gc, unsigned int offset,
enum pin_config_param mode)
{
@@ -3060,7 +3069,7 @@ static int gpio_set_config(struct gpio_chip *gc, unsigned int offset,
}

config = PIN_CONF_PACKED(mode, arg);
- return gc->set_config ? gc->set_config(gc, offset, config) : -ENOTSUPP;
+ return gpio_do_set_config(gc, offset, mode);
}

static int gpio_set_bias(struct gpio_chip *chip, struct gpio_desc *desc)
@@ -3294,15 +3303,9 @@ int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce)

VALIDATE_DESC(desc);
chip = desc->gdev->chip;
- if (!chip->set || !chip->set_config) {
- gpiod_dbg(desc,
- "%s: missing set() or set_config() operations\n",
- __func__);
- return -ENOTSUPP;
- }

config = pinconf_to_config_packed(PIN_CONFIG_INPUT_DEBOUNCE, debounce);
- return chip->set_config(chip, gpio_chip_hwgpio(desc), config);
+ return gpio_do_set_config(chip, gpio_chip_hwgpio(desc), config);
}
EXPORT_SYMBOL_GPL(gpiod_set_debounce);

@@ -3339,7 +3342,7 @@ int gpiod_set_transitory(struct gpio_desc *desc, bool transitory)
packed = pinconf_to_config_packed(PIN_CONFIG_PERSIST_STATE,
!transitory);
gpio = gpio_chip_hwgpio(desc);
- rc = chip->set_config(chip, gpio, packed);
+ rc = gpio_do_set_config(chip, gpio, packed);
if (rc == -ENOTSUPP) {
dev_dbg(&desc->gdev->dev, "Persistence not supported for GPIO %d\n",
gpio);
--
2.23.0