gpio/rockchip: extended debounce support is only available on v2

The gpio driver runs into issues on v1 gpio blocks, as the db_clk
and the whole extended debounce support is only ever defined on v2.
So checking for the IS_ERR on the db_clk is not enough, as it will
be NULL on v1.

Fix this by adding the needed condition for v2 first before checking
the existence of the db_clk.

This caused my rk3288-veyron-pinky to enter a reboot loop when it
tried to enable the power-key as adc-key device.

Fixes: 3bcbd1a85b ("gpio/rockchip: support next version gpio controller")
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
This commit is contained in:
Heiko Stuebner 2021-09-14 00:49:23 +02:00 коммит произвёл Bartosz Golaszewski
Родитель f6c35df227
Коммит 0f562b7de9
1 изменённых файлов: 1 добавлений и 1 удалений

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@ -195,7 +195,7 @@ static int rockchip_gpio_set_debounce(struct gpio_chip *gc,
unsigned int cur_div_reg;
u64 div;
if (!IS_ERR(bank->db_clk)) {
if (bank->gpio_type == GPIO_TYPE_V2 && !IS_ERR(bank->db_clk)) {
div_debounce_support = true;
freq = clk_get_rate(bank->db_clk);
max_debounce = (GENMASK(23, 0) + 1) * 2 * 1000000 / freq;