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authorLinus Walleij <linus.walleij@linaro.org>2017-01-26 15:27:54 +0100
committerLinus Walleij <linus.walleij@linaro.org>2017-01-26 15:27:54 +0100
commit27a2873617415f7a5b9881a532008efd92334b05 (patch)
tree55e1d83ab16e2cfff45fe09cc12e1cd21cd78fda /drivers/pinctrl/core.c
parentaf81ba3cfdeefcb743e3f82cdbdbac8294ae6779 (diff)
parent2956b5d94a76b596fa5057c2b3ca915cb27d7652 (diff)
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Merge branch 'ib-pinctrl-genprops' into devel
Diffstat (limited to 'drivers/pinctrl/core.c')
-rw-r--r--drivers/pinctrl/core.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index 2f853e03d28d..d69046537b75 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -862,6 +862,35 @@ int pinctrl_gpio_direction_output(unsigned gpio)
}
EXPORT_SYMBOL_GPL(pinctrl_gpio_direction_output);
+/**
+ * pinctrl_gpio_set_config() - Apply config to given GPIO pin
+ * @gpio: the GPIO pin number from the GPIO subsystem number space
+ * @config: the configuration to apply to the GPIO
+ *
+ * This function should *ONLY* be used from gpiolib-based GPIO drivers, if
+ * they need to call the underlying pin controller to change GPIO config
+ * (for example set debounce time).
+ */
+int pinctrl_gpio_set_config(unsigned gpio, unsigned long config)
+{
+ unsigned long configs[] = { config };
+ struct pinctrl_gpio_range *range;
+ struct pinctrl_dev *pctldev;
+ int ret, pin;
+
+ ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range);
+ if (ret)
+ return ret;
+
+ mutex_lock(&pctldev->mutex);
+ pin = gpio_to_pin(range, gpio);
+ ret = pinconf_set_config(pctldev, pin, configs, ARRAY_SIZE(configs));
+ mutex_unlock(&pctldev->mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(pinctrl_gpio_set_config);
+
static struct pinctrl_state *find_state(struct pinctrl *p,
const char *name)
{