diff options
Diffstat (limited to 'drivers/pinctrl/core.c')
| -rw-r--r-- | drivers/pinctrl/core.c | 35 |
1 files changed, 32 insertions, 3 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index 71db586b2afd..5cdee8669ea3 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -345,18 +345,47 @@ void pinctrl_add_gpio_ranges(struct pinctrl_dev *pctldev, } EXPORT_SYMBOL_GPL(pinctrl_add_gpio_ranges); -struct pinctrl_dev *find_pinctrl_and_add_gpio_range(const char *devname, +struct pinctrl_dev *pinctrl_find_and_add_gpio_range(const char *devname, struct pinctrl_gpio_range *range) { struct pinctrl_dev *pctldev = get_pinctrl_dev_from_devname(devname); + /* + * If we can't find this device, let's assume that is because + * it has not probed yet, so the driver trying to register this + * range need to defer probing. + */ if (!pctldev) - return NULL; + return ERR_PTR(-EPROBE_DEFER); pinctrl_add_gpio_range(pctldev, range); return pctldev; } -EXPORT_SYMBOL_GPL(find_pinctrl_and_add_gpio_range); +EXPORT_SYMBOL_GPL(pinctrl_find_and_add_gpio_range); + +/** + * pinctrl_find_gpio_range_from_pin() - locate the GPIO range for a pin + * @pctldev: the pin controller device to look in + * @pin: a controller-local number to find the range for + */ +struct pinctrl_gpio_range * +pinctrl_find_gpio_range_from_pin(struct pinctrl_dev *pctldev, + unsigned int pin) +{ + struct pinctrl_gpio_range *range = NULL; + + /* Loop over the ranges */ + list_for_each_entry(range, &pctldev->gpio_ranges, node) { + /* Check if we're in the valid range */ + if (pin >= range->pin_base && + pin < range->pin_base + range->npins) { + return range; + } + } + + return NULL; +} +EXPORT_SYMBOL_GPL(pinctrl_find_gpio_range_from_pin); /** * pinctrl_remove_gpio_range() - remove a range of GPIOs fro a pin controller |