leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

pinctrl: ingenic: Implement .get_direction for GPIO chips

Browse Source 
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>
This commit is contained in:
Paul Cercueil 2018-08-21 18:42:33 +02:00 committed by Linus Walleij
parent e72394e2ea
commit ebd6651418
1 changed files with 16 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/pinctrl/pinctrl-ingenic.c
View File

@ -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;