diff options
| author |   Paul Cercueil <paul@crapouillou.net> | 2018-08-21 18:42:33 +0200 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2018-08-29 13:37:14 +0200 |
| commit | ebd6651418b64ff358e105d611ad993f534b8ea7 (patch) | |
| tree | 1be5acecbbed516b3d646c6d9d9a106fe2ec7507 /drivers/pinctrl/pinctrl-ingenic.c | |
| parent | pinctrl: ingenic: Merge GPIO functionality (diff) | |
| download | linux-dev-ebd6651418b64ff358e105d611ad993f534b8ea7.tar.xz linux-dev-ebd6651418b64ff358e105d611ad993f534b8ea7.zip | |
pinctrl: ingenic: Implement .get_direction for GPIO chips
This allows to read from debugfs whether the GPIOs requested are set as
input or output.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-ingenic.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-ingenic.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-ingenic.c b/drivers/pinctrl/pinctrl-ingenic.c index 75115733144e..f4aa7d4529e8 100644 --- a/drivers/pinctrl/pinctrl-ingenic.c +++ b/drivers/pinctrl/pinctrl-ingenic.c @@ -699,6 +699,21 @@ static inline bool ingenic_get_pin_config(struct ingenic_pinctrl *jzpc, return val & BIT(idx); } +static int ingenic_gpio_get_direction(struct gpio_chip *gc, unsigned int offset) +{ + struct ingenic_gpio_chip *jzgc = gpiochip_get_data(gc); + struct ingenic_pinctrl *jzpc = jzgc->jzpc; + unsigned int pin = gc->base + offset; + + if (jzpc->version >= ID_JZ4770) + return ingenic_get_pin_config(jzpc, pin, JZ4770_GPIO_PAT1); + + if (ingenic_get_pin_config(jzpc, pin, JZ4740_GPIO_SELECT)) + return true; + + return !ingenic_get_pin_config(jzpc, pin, JZ4740_GPIO_DIR); +} + static const struct pinctrl_ops ingenic_pctlops = { .get_groups_count = pinctrl_generic_get_group_count, .get_group_name = pinctrl_generic_get_group_name, @@ -1003,6 +1018,7 @@ static int __init ingenic_gpio_probe(struct ingenic_pinctrl *jzpc, jzgc->gc.get = ingenic_gpio_get; jzgc->gc.direction_input = ingenic_gpio_direction_input; jzgc->gc.direction_output = ingenic_gpio_direction_output; + jzgc->gc.get_direction = ingenic_gpio_get_direction; if (of_property_read_bool(node, "gpio-ranges")) { jzgc->gc.request = gpiochip_generic_request; |