From e5b3b2d9ed202697a937c282f9c4d93b1e3e0848 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Antoine=20T=C3=A9nart?= Date: Thu, 10 Apr 2014 15:07:50 +0200 Subject: pinctrl: allows not to define the get_group_pins operation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Linus Walleij --- drivers/pinctrl/pinmux.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) (limited to 'drivers/pinctrl/pinmux.c') diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c index 9248ce4efed4..051e8592990e 100644 --- a/drivers/pinctrl/pinmux.c +++ b/drivers/pinctrl/pinmux.c @@ -391,14 +391,16 @@ int pinmux_enable_setting(struct pinctrl_setting const *setting) struct pinctrl_dev *pctldev = setting->pctldev; const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; const struct pinmux_ops *ops = pctldev->desc->pmxops; - int ret; - const unsigned *pins; - unsigned num_pins; + int ret = 0; + const unsigned *pins = NULL; + unsigned num_pins = 0; int i; struct pin_desc *desc; - ret = pctlops->get_group_pins(pctldev, setting->data.mux.group, - &pins, &num_pins); + if (pctlops->get_group_pins) + ret = pctlops->get_group_pins(pctldev, setting->data.mux.group, + &pins, &num_pins); + if (ret) { const char *gname; @@ -470,14 +472,15 @@ void pinmux_disable_setting(struct pinctrl_setting const *setting) struct pinctrl_dev *pctldev = setting->pctldev; const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; const struct pinmux_ops *ops = pctldev->desc->pmxops; - int ret; - const unsigned *pins; - unsigned num_pins; + int ret = 0; + const unsigned *pins = NULL; + unsigned num_pins = 0; int i; struct pin_desc *desc; - ret = pctlops->get_group_pins(pctldev, setting->data.mux.group, - &pins, &num_pins); + if (pctlops->get_group_pins) + ret = pctlops->get_group_pins(pctldev, setting->data.mux.group, + &pins, &num_pins); if (ret) { const char *gname; -- cgit v1.2.3