From: Quentin Schulz quentin.schulz@theobroma-systems.com
commit 4635c0e2a7f7f3568cbfccae70121f9835efa62c upstream.
Before the split of gpio and pinctrl sections in their own driver, rockchip_set_mux was called in pinmux_ops.gpio_set_direction for configuring a pin in its GPIO function.
This is essential for cases where pinctrl is "bypassed" by gpio consumers otherwise the GPIO function is not configured for the pin and it does not work. Such was the case for the sysfs/libgpiod userspace GPIO handling.
Let's re-implement the pinmux_ops.gpio_set_direction callback so that the gpio subsystem can request from the pinctrl driver to put the pin in its GPIO function.
Fixes: 9ce9a02039de ("pinctrl/rockchip: drop the gpio related codes") Cc: stable@vger.kernel.org Reviewed-by: Heiko Stuebner heiko@sntech.de Signed-off-by: Quentin Schulz quentin.schulz@theobroma-systems.com Link: https://lore.kernel.org/r/20220930132033.4003377-2-foss+kernel@0leil.net Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pinctrl/pinctrl-rockchip.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
--- a/drivers/pinctrl/pinctrl-rockchip.c +++ b/drivers/pinctrl/pinctrl-rockchip.c @@ -2393,11 +2393,24 @@ static int rockchip_pmx_set(struct pinct return 0; }
+static int rockchip_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned offset, + bool input) +{ + struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + struct rockchip_pin_bank *bank; + + bank = pin_to_bank(info, offset); + return rockchip_set_mux(bank, offset - bank->pin_base, RK_FUNC_GPIO); +} + static const struct pinmux_ops rockchip_pmx_ops = { .get_functions_count = rockchip_pmx_get_funcs_count, .get_function_name = rockchip_pmx_get_func_name, .get_function_groups = rockchip_pmx_get_groups, .set_mux = rockchip_pmx_set, + .gpio_set_direction = rockchip_pmx_gpio_set_direction, };
/*