diff options
| author | Hanks Chen <hanks.chen@mediatek.com> | 2020-07-23 19:19:53 +0800 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2020-08-04 01:29:09 +0200 |
| commit | edd546465002621665a3a275abe908a30efdce5b (patch) | |
| tree | df9c402f5e01442998b4a720be5927c0a8ebfd47 /drivers/pinctrl | |
| parent | b07b616214857c9db01e2807cde2f6bba8019fc3 (diff) | |
pinctrl: mediatek: avoid virtual gpio trying to set reg
for virtual gpios, they should not do reg setting and
should behave as expected for eint function.
Signed-off-by: Mars Cheng <mars.cheng@mediatek.com>
Signed-off-by: Hanks Chen <hanks.chen@mediatek.com>
Acked-by: Sean Wang <sean.wang@kernel.org>
Link: https://lore.kernel.org/r/1595503197-15246-4-git-send-email-hanks.chen@mediatek.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c | 25 | ||||
| -rw-r--r-- | drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h | 1 | ||||
| -rw-r--r-- | drivers/pinctrl/mediatek/pinctrl-paris.c | 7 |
3 files changed, 33 insertions, 0 deletions
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c index b77b18fe5adc..c53e2c391e32 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c @@ -243,6 +243,28 @@ static int mtk_xt_find_eint_num(struct mtk_pinctrl *hw, unsigned long eint_n) return EINT_NA; } +/* + * Virtual GPIO only used inside SOC and not being exported to outside SOC. + * Some modules use virtual GPIO as eint (e.g. pmif or usb). + * In MTK platform, external interrupt (EINT) and GPIO is 1-1 mapping + * and we can set GPIO as eint. + * But some modules use specific eint which doesn't have real GPIO pin. + * So we use virtual GPIO to map it. + */ + +bool mtk_is_virt_gpio(struct mtk_pinctrl *hw, unsigned int gpio_n) +{ + const struct mtk_pin_desc *desc; + bool virt_gpio = false; + + desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio_n]; + + if (desc->funcs && !desc->funcs[desc->eint.eint_m].name) + virt_gpio = true; + + return virt_gpio; +} + static int mtk_xt_get_gpio_n(void *data, unsigned long eint_n, unsigned int *gpio_n, struct gpio_chip **gpio_chip) @@ -295,6 +317,9 @@ static int mtk_xt_set_gpio_as_eint(void *data, unsigned long eint_n) if (err) return err; + if (mtk_is_virt_gpio(hw, gpio_n)) + return 0; + desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio_n]; err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE, diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h index 45aa0fdbe330..e2aae285b5fc 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h @@ -315,4 +315,5 @@ int mtk_pinconf_adv_drive_set(struct mtk_pinctrl *hw, int mtk_pinconf_adv_drive_get(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc, u32 *val); +bool mtk_is_virt_gpio(struct mtk_pinctrl *hw, unsigned int gpio_n); #endif /* __PINCTRL_MTK_COMMON_V2_H */ diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c index 90a432bf9fed..a23c18251965 100644 --- a/drivers/pinctrl/mediatek/pinctrl-paris.c +++ b/drivers/pinctrl/mediatek/pinctrl-paris.c @@ -769,6 +769,13 @@ static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned int gpio) if (gpio >= hw->soc->npins) return -EINVAL; + /* + * "Virtual" GPIOs are always and only used for interrupts + * Since they are only used for interrupts, they are always inputs + */ + if (mtk_is_virt_gpio(hw, gpio)) + return 1; + desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &value); |