pinctrl: core: create nolock version of pinctrl_find_gpio_range_from_pin
pinctrl_find_gpio_range_from_pin takes the pctldev->mutex but so
does pinconf_pins_show and this will cause a deadlock if
pinctrl_find_gpio_range_from_pin is used in .pin_config_get
callback.
Create a nolock version of pinctrl_find_gpio_range_from_pin to
allow pin to gpio lookup to be used from pinconf_pins_show.
Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/core.h b/drivers/pinctrl/core.h
index b24ea84..ca08723 100644
--- a/drivers/pinctrl/core.h
+++ b/drivers/pinctrl/core.h
@@ -182,6 +182,10 @@
return radix_tree_lookup(&pctldev->pin_desc_tree, pin);
}
+extern struct pinctrl_gpio_range *
+pinctrl_find_gpio_range_from_pin_nolock(struct pinctrl_dev *pctldev,
+ unsigned int pin);
+
int pinctrl_register_map(struct pinctrl_map const *maps, unsigned num_maps,
bool dup);
void pinctrl_unregister_map(struct pinctrl_map const *map);