• Antoine Ténart's avatar
    pinctrl: allows not to define the get_group_pins operation · e5b3b2d9
    Antoine Ténart authored
    When using a group only pinctrl driver, which does not have any
    information on the pins it is useless to define a get_group_pins
    always returning an empty list of pins.
    
    When not using get_group_pin[1], a driver must implement it so
    pins = NULL and num_pins = 0. This patch makes it the default
    behaviour if not defined in the pinctrl driver when used in
    pinmux enable and disable funtions and in pinctrl_groups_show.
    
    It also adds a check in pinctrl_get_group_pins and return -EINVAL if
    not defined. This function is called in the gpiolib when adding when
    pingroup range. It cannot be used if no group is defined, so this seams
    reasonable.
    
    [1] get_group_pin(struct pinctrl_dev *pctldev,
    		  unsigned selector,
    		  const unsigned **pins,
    		  unsigned *num_pins);
    
    Signed-off-by: Antoine Ténart <antoine.tenart@free-electrons.com>
    Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
    e5b3b2d9
core.c 45.8 KB