From: Geert Uytterhoeven <geert+renesas@glider.be> To: Magnus Damm <magnus.damm@gmail.com> Cc: Ulrich Hecht <uli+renesas@fpond.eu>, Linus Walleij <linus.walleij@linaro.org>, linux-renesas-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Geert Uytterhoeven <geert+renesas@glider.be> Subject: [PATCH] ARM: dts: koelsch: Configure pull-up for SOFT_SW GPIO keys Date: Wed, 3 Mar 2021 14:29:41 +0100 [thread overview] Message-ID: <20210303132941.3938516-1-geert+renesas@glider.be> (raw) The GPIO pins connected to the 4 Software Switches ("SOFT_SW", SW2) do not have external pull-up resistors, but rely on internal pull-ups being enabled. Fortunately this is satisfied by the initial state of these pins. Make this explicit by enabling bias-pull-up, to remove the dependency on initial state and/or boot loader configuration. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- To be queued in renesas-devel for v5.13. It is safe to apply this before R-Car M2-W bias support[1] has landed, as pinctrl_bind_pins() does not consider -ENOTSUPP a fatal error. [1] https://lore.kernel.org/r/20210303132619.3938128-1-geert+renesas@glider.be --- arch/arm/boot/dts/r8a7791-koelsch.dts | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm/boot/dts/r8a7791-koelsch.dts b/arch/arm/boot/dts/r8a7791-koelsch.dts index 751e07fb102cf454..c6c93c4452ee1e88 100644 --- a/arch/arm/boot/dts/r8a7791-koelsch.dts +++ b/arch/arm/boot/dts/r8a7791-koelsch.dts @@ -81,6 +81,9 @@ lbsc { keyboard { compatible = "gpio-keys"; + pinctrl-0 = <&sw2_pins>; + pinctrl-names = "default"; + key-1 { gpios = <&gpio5 0 GPIO_ACTIVE_LOW>; linux,code = <KEY_1>; @@ -615,6 +618,11 @@ sound_clk_pins: sound_clk { groups = "audio_clk_a"; function = "audio_clk"; }; + + sw2_pins: sw2 { + pins = "GP_5_0", "GP_5_1", "GP_5_2", "GP_5_3"; + bias-pull-up; + }; }; ðer { -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert+renesas@glider.be> To: Magnus Damm <magnus.damm@gmail.com> Cc: Ulrich Hecht <uli+renesas@fpond.eu>, Linus Walleij <linus.walleij@linaro.org>, linux-renesas-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Geert Uytterhoeven <geert+renesas@glider.be> Subject: [PATCH] ARM: dts: koelsch: Configure pull-up for SOFT_SW GPIO keys Date: Wed, 3 Mar 2021 14:29:41 +0100 [thread overview] Message-ID: <20210303132941.3938516-1-geert+renesas@glider.be> (raw) The GPIO pins connected to the 4 Software Switches ("SOFT_SW", SW2) do not have external pull-up resistors, but rely on internal pull-ups being enabled. Fortunately this is satisfied by the initial state of these pins. Make this explicit by enabling bias-pull-up, to remove the dependency on initial state and/or boot loader configuration. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- To be queued in renesas-devel for v5.13. It is safe to apply this before R-Car M2-W bias support[1] has landed, as pinctrl_bind_pins() does not consider -ENOTSUPP a fatal error. [1] https://lore.kernel.org/r/20210303132619.3938128-1-geert+renesas@glider.be --- arch/arm/boot/dts/r8a7791-koelsch.dts | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm/boot/dts/r8a7791-koelsch.dts b/arch/arm/boot/dts/r8a7791-koelsch.dts index 751e07fb102cf454..c6c93c4452ee1e88 100644 --- a/arch/arm/boot/dts/r8a7791-koelsch.dts +++ b/arch/arm/boot/dts/r8a7791-koelsch.dts @@ -81,6 +81,9 @@ lbsc { keyboard { compatible = "gpio-keys"; + pinctrl-0 = <&sw2_pins>; + pinctrl-names = "default"; + key-1 { gpios = <&gpio5 0 GPIO_ACTIVE_LOW>; linux,code = <KEY_1>; @@ -615,6 +618,11 @@ sound_clk_pins: sound_clk { groups = "audio_clk_a"; function = "audio_clk"; }; + + sw2_pins: sw2 { + pins = "GP_5_0", "GP_5_1", "GP_5_2", "GP_5_3"; + bias-pull-up; + }; }; ðer { -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2021-03-04 0:28 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-03-03 13:29 Geert Uytterhoeven [this message] 2021-03-03 13:29 ` [PATCH] ARM: dts: koelsch: Configure pull-up for SOFT_SW GPIO keys Geert Uytterhoeven 2021-03-22 23:03 ` Niklas Söderlund 2021-03-22 23:03 ` Niklas Söderlund
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