• Mika Westerberg's avatar
    pinctrl / gpio: Introduce .set_config() callback for GPIO chips · 2956b5d9
    Mika Westerberg authored
    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: 's avatarLinus Walleij <linus.walleij@linaro.org>
    Signed-off-by: 's avatarMika Westerberg <mika.westerberg@linux.intel.com>
    Reviewed-by: 's avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
    Signed-off-by: 's avatarLinus Walleij <linus.walleij@linaro.org>
    2956b5d9