diff options
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r-- | drivers/pinctrl/core.c | 59 |
1 files changed, 49 insertions, 10 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index dca9208..33710b5 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -283,6 +283,29 @@ static int pinctrl_register_pins(struct pinctrl_dev *pctldev, } /** + * gpio_to_pin() - GPIO range GPIO number to pin number translation + * @range: GPIO range used for the translation + * @gpio: gpio pin to translate to a pin number + * + * Finds the pin number for a given GPIO using the specified GPIO range + * as a base for translation. The distinction between linear GPIO ranges + * and pin list based GPIO ranges is managed correctly by this function. + * + * This function assumes the gpio is part of the specified GPIO range, use + * only after making sure this is the case (e.g. by calling it on the + * result of successful pinctrl_get_device_gpio_range calls)! + */ +static inline int gpio_to_pin(struct pinctrl_gpio_range *range, + unsigned int gpio) +{ + unsigned int offset = gpio - range->base; + if (range->pins) + return range->pins[offset]; + else + return range->pin_base + offset; +} + +/** * pinctrl_match_gpio_range() - check if a certain GPIO pin is in range * @pctldev: pin controller device to check * @gpio: gpio pin to check taken from the global GPIO pin space @@ -448,8 +471,14 @@ pinctrl_find_gpio_range_from_pin(struct pinctrl_dev *pctldev, /* 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) { + if (range->pins) { + int a; + for (a = 0; a < range->npins; a++) { + if (range->pins[a] == pin) + return range; + } + } else if (pin >= range->pin_base && + pin < range->pin_base + range->npins) { mutex_unlock(&pctldev->mutex); return range; } @@ -529,7 +558,7 @@ int pinctrl_request_gpio(unsigned gpio) } /* Convert to the pin controllers number space */ - pin = gpio - range->base + range->pin_base; + pin = gpio_to_pin(range, gpio); ret = pinmux_request_gpio(pctldev, range, pin, gpio); @@ -559,7 +588,7 @@ void pinctrl_free_gpio(unsigned gpio) mutex_lock(&pctldev->mutex); /* Convert to the pin controllers number space */ - pin = gpio - range->base + range->pin_base; + pin = gpio_to_pin(range, gpio); pinmux_free_gpio(pctldev, pin, range); @@ -582,7 +611,7 @@ static int pinctrl_gpio_direction(unsigned gpio, bool input) mutex_lock(&pctldev->mutex); /* Convert to the pin controllers number space */ - pin = gpio - range->base + range->pin_base; + pin = gpio_to_pin(range, gpio); ret = pinmux_gpio_direction(pctldev, range, pin, input); mutex_unlock(&pctldev->mutex); @@ -1349,11 +1378,21 @@ static int pinctrl_gpioranges_show(struct seq_file *s, void *what) /* Loop over the ranges */ list_for_each_entry(range, &pctldev->gpio_ranges, node) { - seq_printf(s, "%u: %s GPIOS [%u - %u] PINS [%u - %u]\n", - range->id, range->name, - range->base, (range->base + range->npins - 1), - range->pin_base, - (range->pin_base + range->npins - 1)); + if (range->pins) { + int a; + seq_printf(s, "%u: %s GPIOS [%u - %u] PINS {", + range->id, range->name, + range->base, (range->base + range->npins - 1)); + for (a = 0; a < range->npins - 1; a++) + seq_printf(s, "%u, ", range->pins[a]); + seq_printf(s, "%u}\n", range->pins[a]); + } + else + seq_printf(s, "%u: %s GPIOS [%u - %u] PINS [%u - %u]\n", + range->id, range->name, + range->base, (range->base + range->npins - 1), + range->pin_base, + (range->pin_base + range->npins - 1)); } mutex_unlock(&pctldev->mutex); |