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authorAntoine Ténart <antoine.tenart@free-electrons.com>2014-04-10 17:07:50 +0400
committerLinus Walleij <linus.walleij@linaro.org>2014-04-22 16:47:02 +0400
commite5b3b2d9ed202697a937c282f9c4d93b1e3e0848 (patch)
tree787cdc0ff48a468a7a1f466c4bf60019eb99a30e /drivers/pinctrl/pinmux.c
parenteb171a997de8b746f4d52b23108d64e9f88f0a09 (diff)
downloadlinux-e5b3b2d9ed202697a937c282f9c4d93b1e3e0848.tar.xz
pinctrl: allows not to define the get_group_pins operation
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: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinmux.c')
-rw-r--r--drivers/pinctrl/pinmux.c23
1 files changed, 13 insertions, 10 deletions
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;