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authorMika Westerberg <mika.westerberg@linux.intel.com>2017-01-23 15:34:34 +0300
committerLinus Walleij <linus.walleij@linaro.org>2017-01-26 15:27:37 +0100
commit2956b5d94a76b596fa5057c2b3ca915cb27d7652 (patch)
tree3a1dbce1201ef4923a4124f63eb209026e8fba7e /drivers/gpio/gpio-dln2.c
parent15381bc7c7f52d56f87c56dd7c948ad78704b852 (diff)
pinctrl / gpio: Introduce .set_config() callback for GPIO chips
Currently we already have two pin configuration related callbacks available for GPIO chips .set_single_ended() and .set_debounce(). In future we expect to have even more, which does not scale well if we need to add yet another callback to the GPIO chip structure for each possible configuration parameter. Better solution is to reuse what we already have available in the generic pinconf. To support this, we introduce a new .set_config() callback for GPIO chips. The callback takes a single packed pin configuration value as parameter. This can then be extended easily beyond what is currently supported by just adding new types to the generic pinconf enum. If the GPIO driver is backed up by a pinctrl driver the GPIO driver can just assign gpiochip_generic_config() (introduced in this patch) to .set_config and that will take care configuration requests are directed to the pinctrl driver. We then convert the existing drivers over .set_config() and finally remove the .set_single_ended() and .set_debounce() callbacks. Suggested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-dln2.c')
-rw-r--r--drivers/gpio/gpio-dln2.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/gpio/gpio-dln2.c b/drivers/gpio/gpio-dln2.c
index 5d38b08d1ee2..aecb847166f5 100644
--- a/drivers/gpio/gpio-dln2.c
+++ b/drivers/gpio/gpio-dln2.c
@@ -272,12 +272,16 @@ static int dln2_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
return dln2_gpio_set_direction(chip, offset, DLN2_GPIO_DIRECTION_OUT);
}
-static int dln2_gpio_set_debounce(struct gpio_chip *chip, unsigned offset,
- unsigned debounce)
+static int dln2_gpio_set_config(struct gpio_chip *chip, unsigned offset,
+ unsigned long config)
{
struct dln2_gpio *dln2 = gpiochip_get_data(chip);
- __le32 duration = cpu_to_le32(debounce);
+ __le32 duration;
+ if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
+ return -ENOTSUPP;
+
+ duration = cpu_to_le32(pinconf_to_config_argument(config));
return dln2_transfer_tx(dln2->pdev, DLN2_GPIO_SET_DEBOUNCE,
&duration, sizeof(duration));
}
@@ -474,7 +478,7 @@ static int dln2_gpio_probe(struct platform_device *pdev)
dln2->gpio.get_direction = dln2_gpio_get_direction;
dln2->gpio.direction_input = dln2_gpio_direction_input;
dln2->gpio.direction_output = dln2_gpio_direction_output;
- dln2->gpio.set_debounce = dln2_gpio_set_debounce;
+ dln2->gpio.set_config = dln2_gpio_set_config;
platform_set_drvdata(pdev, dln2);