shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-05 18:41:58 +09:00
Code Issues Packages Projects Releases Wiki Activity

gpio: rockchip: Update debounce config function

Browse Source 
GPIO_TYPE_V2 supports debounce configuration.

Signed-off-by: Ye Zhang <ye.zhang@rock-chips.com>
Change-Id: I52bae10669e2d10d4deabe775b660d09ce380481
This commit is contained in:
Ye Zhang
2024-08-22 09:45:22 +08:00
committed by Tao Huang
parent 51a075438d
commit 2af76b3213
1 changed files with 3 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/gpio/gpio-rockchip.c
View File

@@ -262,6 +262,8 @@ static int rockchip_gpio_set_debounce(struct gpio_chip *gc,
clk_prepare_enable(bank->db_clk); clk_prepare_enable(bank->db_clk);
else else
clk_disable_unprepare(bank->db_clk); clk_disable_unprepare(bank->db_clk);
} else {
return -ENOTSUPP;
} }
return 0; return 0;
@@ -294,19 +296,7 @@ static int rockchip_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
switch (param) { switch (param) {
case PIN_CONFIG_INPUT_DEBOUNCE: case PIN_CONFIG_INPUT_DEBOUNCE:
rockchip_gpio_set_debounce(gc, offset, debounce); return rockchip_gpio_set_debounce(gc, offset, debounce);
/*
* Rockchip's gpio could only support up to one period
* of the debounce clock(pclk), which is far away from
* satisftying the requirement, as pclk is usually near
* 100MHz shared by all peripherals. So the fact is it
* has crippled debounce capability could only be useful
* to prevent any spurious glitches from waking up the system
* if the gpio is conguired as wakeup interrupt source. Let's
* still return -ENOTSUPP as before, to make sure the caller
* of gpiod_set_debounce won't change its behaviour.
*/
return -ENOTSUPP;
default: default:
return -ENOTSUPP; return -ENOTSUPP;
} }