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| author | Arnaud Ferraris <arnaud.ferraris@collabora.com> | 2022-12-15 11:19:47 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-02-14 19:11:49 +0100 |
| commit | 10150d35091778beb5840b6a6ecf371e127f4e69 (patch) | |
| tree | 0b010c8f71e0a51f8fadfc2c7352bb9102cccaa6 /arch | |
| parent | 81685c59dc4b8a790955b560fe47eec4f4f2d694 (diff) | |
| download | linux-riscv-10150d35091778beb5840b6a6ecf371e127f4e69.tar.gz linux-riscv-10150d35091778beb5840b6a6ecf371e127f4e69.tar.bz2 linux-riscv-10150d35091778beb5840b6a6ecf371e127f4e69.zip | |
arm64: dts: rockchip: fix input enable pinconf on rk3399
[ Upstream commit 6f515b663d49a14fb63f8c5d0a2a4ae53d44790a ]
When the input enable pinconf was introduced, a default drive-strength
value of 2 was set for the pull up/down configs. However, this parameter
is unneeded when configuring the pin as input, and having a single
hardcoded value here is actually harmful: GPIOs on the RK3399 have
various same drive-strength capabilities depending on the bank and port
they belong to.
As an example, trying to configure the GPIO4_PD3 pin as an input with
pull-up enabled fails with the following output:
[ 10.706542] rockchip-pinctrl pinctrl: unsupported driver strength 2
[ 10.713661] rockchip-pinctrl pinctrl: pin_config_set op failed for pin 155
(acceptable drive-strength values for this pin being 3, 6, 9 and 12)
Let's drop the drive-strength property from all input pinconfs in order
to solve this issue.
Fixes: ec48c3e82ca3 ("arm64: dts: rockchip: add an input enable pinconf to rk3399")
Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
Reviewed-by: Caleb Connolly <kc@postmarketos.org>
Link: https://lore.kernel.org/r/20221215101947.254896-1-arnaud.ferraris@collabora.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/boot/dts/rockchip/rk3399.dtsi | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi index 92c2207e686c..59858f2dc8b9 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi @@ -2221,13 +2221,11 @@ pcfg_input_pull_up: pcfg-input-pull-up { input-enable; bias-pull-up; - drive-strength = <2>; }; pcfg_input_pull_down: pcfg-input-pull-down { input-enable; bias-pull-down; - drive-strength = <2>; }; clock { |