[PATCH] pinctrl: rockchip: fix reading pull type on rk3568

[jay.xu at rock-chips.com]

Hi Jonas

--------------
jay.xu at rock-chips.com
>When reading pinconf-pins from debugfs it fails to get the configured pull
>type on RK3568, "unsupported pinctrl type" error messages is also reported.
>
>Fix this by adding support for RK3568 in rockchip_get_pull, including a
>reverse of the pull-up value swap applied in rockchip_set_pull so that
>pull-up is correctly reported in pinconf-pins.
>Also update the workaround comment to reflect affected pins, GPIO0_D3-D6.
>
>Fixes: c0dadc0e47a8 ("pinctrl: rockchip: add support for rk3568")
>Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
>--- 

Signed-off-by: Jianqun Xu <jay.xu at rock-chips.com>

> drivers/pinctrl/pinctrl-rockchip.c | 11 ++++++++++-
> 1 file changed, 10 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
>index 849d5fa2a362..5eeac92f610a 100644
>--- a/drivers/pinctrl/pinctrl-rockchip.c
>+++ b/drivers/pinctrl/pinctrl-rockchip.c
>@@ -2436,10 +2436,19 @@ static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
> case RK3308:
> case RK3368:
> case RK3399:
>+	case RK3568:
> case RK3588:
> pull_type = bank->pull_type[pin_num / 8];
> data >>= bit;
> data &= (1 << RK3188_PULL_BITS_PER_PIN) - 1;
>+	/*
>+	* In the TRM, pull-up being 1 for everything except the GPIO0_D3-D6,
>+	* where that pull up value becomes 3.
>+	*/
>+	if (ctrl->type == RK3568 && bank->bank_num == 0 && pin_num >= 27 && pin_num <= 30) {
>+	if (data == 3)
>+	data = 1;
>+	}
>
> return rockchip_pull_list[pull_type][data];
> default:
>@@ -2497,7 +2506,7 @@ static int rockchip_set_pull(struct rockchip_pin_bank *bank,
> }
> }
> /*
>-	* In the TRM, pull-up being 1 for everything except the GPIO0_D0-D6,
>+	* In the TRM, pull-up being 1 for everything except the GPIO0_D3-D6,
> * where that pull up value becomes 3.
> */
> if (ctrl->type == RK3568 && bank->bank_num == 0 && pin_num >= 27 && pin_num <= 30) {
>--
>2.39.0
>