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pinctrl / gpio: Introduce .set_config() callback for GPIO chips

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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>
This commit is contained in:
Mika Westerberg
2017-01-23 15:34:34 +03:00
committed by Linus Walleij
parent 15381bc7c7
commit 2956b5d94a
26 changed files with 297 additions and 218 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/gpio/gpio-omap.c
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@@ -974,6 +974,18 @@ static int omap_gpio_debounce(struct gpio_chip *chip, unsigned offset,
return 0;
}
static int omap_gpio_set_config(struct gpio_chip *chip, unsigned offset,
unsigned long config)
{
u32 debounce;
if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
return -ENOTSUPP;
debounce = pinconf_to_config_argument(config);
return omap_gpio_debounce(chip, offset, debounce);
}
static void omap_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
struct gpio_bank *bank;
@@ -1045,7 +1057,7 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
bank->chip.direction_input = omap_gpio_input;
bank->chip.get = omap_gpio_get;
bank->chip.direction_output = omap_gpio_output;
bank->chip.set_debounce = omap_gpio_debounce;
bank->chip.set_config = omap_gpio_set_config;
bank->chip.set = omap_gpio_set;
if (bank->is_mpuio) {
bank->chip.label = "mpuio";