diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c index 8cac73d9c382..b752f5aee6a4 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c @@ -43,6 +43,7 @@ #define MAX_GPIO_MODE_PER_REG 5 #define GPIO_MODE_BITS 3 +#define GPIO_MODE_PREFIX "GPIO" static const char * const mtk_gpio_functions[] = { "func0", "func1", "func2", "func3", @@ -733,12 +734,47 @@ static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev, return 0; } +static int mtk_pmx_find_gpio_mode(struct mtk_pinctrl *pctl, + unsigned offset) +{ + const struct mtk_desc_pin *pin = pctl->devdata->pins + offset; + const struct mtk_desc_function *func = pin->functions; + + while (func && func->name) { + if (!strncmp(func->name, GPIO_MODE_PREFIX, + sizeof(GPIO_MODE_PREFIX)-1)) + return func->muxval; + func++; + } + return -EINVAL; +} + +static int mtk_pmx_gpio_request_enable(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned offset) +{ + unsigned long muxval; + struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + + muxval = mtk_pmx_find_gpio_mode(pctl, offset); + + if (muxval < 0) { + dev_err(pctl->dev, "invalid gpio pin %d.\n", offset); + return -EINVAL; + } + + mtk_pmx_set_mode(pctldev, offset, muxval); + + return 0; +} + static const struct pinmux_ops mtk_pmx_ops = { .get_functions_count = mtk_pmx_get_funcs_cnt, .get_function_name = mtk_pmx_get_func_name, .get_function_groups = mtk_pmx_get_func_groups, .set_mux = mtk_pmx_set_mux, .gpio_set_direction = mtk_pmx_gpio_set_direction, + .gpio_request_enable = mtk_pmx_gpio_request_enable, }; static int mtk_gpio_direction_input(struct gpio_chip *chip, |