pinctrl: add function to retrieve range from pin
This adds a function to the pinctrl core to retrieve the GPIO
range associated with a certain pin for a certain controller.
This is needed when a pinctrl driver want to look up the
corresponding struct gpio_chip for a certain pin. As the
GPIO drivers can now create these ranges themselves, the
pinctrl driver no longer knows about all its associated GPIO
chips.
Change-Id: Ib89718d6bc8d2e4a4b6dab25da1a4e287d1fe9ec
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Git-commit: 9afbefb227792a3c195085d662050dcca748f521
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Signed-off-by: Hanumant Singh <hanumant@codeaurora.org>
diff --git a/include/linux/pinctrl/pinctrl.h b/include/linux/pinctrl/pinctrl.h
index 2abb92e..cad6414 100644
--- a/include/linux/pinctrl/pinctrl.h
+++ b/include/linux/pinctrl/pinctrl.h
@@ -139,6 +139,9 @@
extern struct pinctrl_dev *pinctrl_find_and_add_gpio_range(const char *devname,
struct pinctrl_gpio_range *range);
+extern struct pinctrl_gpio_range *
+pinctrl_find_gpio_range_from_pin(struct pinctrl_dev *pctldev,
+ unsigned int pin);
#ifdef CONFIG_OF
extern struct pinctrl_dev *of_pinctrl_get(struct device_node *np);