diff options
Diffstat (limited to 'drivers/pinctrl/pinmux.c')
| -rw-r--r-- | drivers/pinctrl/pinmux.c | 39 |
1 files changed, 25 insertions, 14 deletions
diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c index 17c3931d5ef0..c77aee5508fb 100644 --- a/drivers/pinctrl/pinmux.c +++ b/drivers/pinctrl/pinmux.c @@ -94,12 +94,11 @@ struct pinmux_hog { * @function: a functional name to give to this pin, passed to the driver * so it knows what function to mux in, e.g. the string "gpioNN" * means that you want to mux in the pin for use as GPIO number NN - * @gpio: if this request concerns a single GPIO pin * @gpio_range: the range matching the GPIO pin if this is a request for a * single GPIO pin */ static int pin_request(struct pinctrl_dev *pctldev, - int pin, const char *function, bool gpio, + int pin, const char *function, struct pinctrl_gpio_range *gpio_range) { struct pin_desc *desc; @@ -143,7 +142,7 @@ static int pin_request(struct pinctrl_dev *pctldev, * If there is no kind of request function for the pin we just assume * we got it by default and proceed. */ - if (gpio && ops->gpio_request_enable) + if (gpio_range && ops->gpio_request_enable) /* This requests and enables a single GPIO pin */ status = ops->gpio_request_enable(pctldev, gpio_range, pin); else if (ops->request) @@ -173,29 +172,39 @@ out: * pin_free() - release a single muxed in pin so something else can be muxed * @pctldev: pin controller device handling this pin * @pin: the pin to free - * @free_func: whether to free the pin's assigned function name string + * @gpio_range: the range matching the GPIO pin if this is a request for a + * single GPIO pin */ -static void pin_free(struct pinctrl_dev *pctldev, int pin, int free_func) +static const char *pin_free(struct pinctrl_dev *pctldev, int pin, + struct pinctrl_gpio_range *gpio_range) { const struct pinmux_ops *ops = pctldev->desc->pmxops; struct pin_desc *desc; + const char *func; desc = pin_desc_get(pctldev, pin); if (desc == NULL) { dev_err(&pctldev->dev, "pin is not registered so it cannot be freed\n"); - return; + return NULL; } - if (ops->free) + /* + * If there is no kind of request function for the pin we just assume + * we got it by default and proceed. + */ + if (gpio_range && ops->gpio_disable_free) + ops->gpio_disable_free(pctldev, gpio_range, pin); + else if (ops->free) ops->free(pctldev, pin); spin_lock(&desc->lock); - if (free_func) - kfree(desc->mux_function); + func = desc->mux_function; desc->mux_function = NULL; spin_unlock(&desc->lock); module_put(pctldev->owner); + + return func; } /** @@ -225,7 +234,7 @@ int pinmux_request_gpio(unsigned gpio) if (!function) return -EINVAL; - ret = pin_request(pctldev, pin, function, true, range); + ret = pin_request(pctldev, pin, function, range); if (ret < 0) kfree(function); @@ -243,6 +252,7 @@ void pinmux_free_gpio(unsigned gpio) struct pinctrl_gpio_range *range; int ret; int pin; + const char *func; ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range); if (ret) @@ -251,7 +261,8 @@ void pinmux_free_gpio(unsigned gpio) /* Convert to the pin controllers number space */ pin = gpio - range->base; - pin_free(pctldev, pin, true); + func = pin_free(pctldev, pin, range); + kfree(func); } EXPORT_SYMBOL_GPL(pinmux_free_gpio); @@ -341,7 +352,7 @@ static int acquire_pins(struct pinctrl_dev *pctldev, /* Try to allocate all pins in this group, one by one */ for (i = 0; i < num_pins; i++) { - ret = pin_request(pctldev, pins[i], func, false, NULL); + ret = pin_request(pctldev, pins[i], func, NULL); if (ret) { dev_err(&pctldev->dev, "could not get pin %d for function %s " @@ -351,7 +362,7 @@ static int acquire_pins(struct pinctrl_dev *pctldev, /* On error release all taken pins */ i--; /* this pin just failed */ for (; i >= 0; i--) - pin_free(pctldev, pins[i], false); + pin_free(pctldev, pins[i], NULL); return -ENODEV; } } @@ -381,7 +392,7 @@ static void release_pins(struct pinctrl_dev *pctldev, return; } for (i = 0; i < num_pins; i++) - pin_free(pctldev, pins[i], false); + pin_free(pctldev, pins[i], NULL); } /** |