5.4-stable review patch. If anyone has any objections, please let me know.
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From: Chen-Yu Tsai wenst@chromium.org
commit 08f66a8edd08f6f7cfa769c81634b29a2b123908 upstream.
In the generic pin config library, readback of some options are handled differently compared to the setting of those options: the argument value is used to convey enable/disable of an option in the set path, but success or -EINVAL is used to convey if an option is enabled or disabled in the debugfs readback path.
PIN_CONFIG_INPUT_SCHMITT_ENABLE is one such option. Fix the readback of the option in the mediatek-paris library, so that the debugfs dump is not showing "input schmitt enabled" for pins that don't have it enabled.
Fixes: 1bea6afbc842 ("pinctrl: mediatek: Refine mtk_pinconf_get()") Signed-off-by: Chen-Yu Tsai wenst@chromium.org Reviewed-by: AngeloGioacchino Del Regno angelogioacchino.delregno@collabora.com Message-ID: 20240327091336.3434141-2-wenst@chromium.org Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pinctrl/mediatek/pinctrl-paris.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/pinctrl/mediatek/pinctrl-paris.c +++ b/drivers/pinctrl/mediatek/pinctrl-paris.c @@ -141,6 +141,8 @@ static int mtk_pinconf_get(struct pinctr }
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SMT, &ret); + if (!ret) + err = -EINVAL; break; case PIN_CONFIG_DRIVE_STRENGTH: if (!hw->soc->drive_get)