From: Chen-Yu Tsai <wens@kernel.org> To: Maxime Ripard <mripard@kernel.org> Cc: Chen-Yu Tsai <wens@csie.org>, Rob Herring <robh+dt@kernel.org>, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 3/8] ARM: dts: sunxi: bananapi-m2-plus-v1.2: Fix CPU supply voltages Date: Sat, 18 Jul 2020 00:00:48 +0800 [thread overview] Message-ID: <20200717160053.31191-4-wens@kernel.org> (raw) In-Reply-To: <20200717160053.31191-1-wens@kernel.org> From: Chen-Yu Tsai <wens@csie.org> The Bananapi M2+ uses a GPIO line to change the effective resistance of the CPU supply regulator's feedback resistor network. The voltages described in the device tree were given directly by the vendor. This turns out to be slightly off compared to the real values. The updated voltages are based on calculations of the feedback resistor network, and verified down to three decimal places with a multi-meter. Fixes: 6eeb4180d4b9 ("ARM: dts: sunxi: h3-h5: Add Bananapi M2+ v1.2 device trees") Signed-off-by: Chen-Yu Tsai <wens@csie.org> --- arch/arm/boot/dts/sunxi-bananapi-m2-plus-v1.2.dtsi | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/arm/boot/dts/sunxi-bananapi-m2-plus-v1.2.dtsi b/arch/arm/boot/dts/sunxi-bananapi-m2-plus-v1.2.dtsi index a628b5ee72b6..235994a4a2eb 100644 --- a/arch/arm/boot/dts/sunxi-bananapi-m2-plus-v1.2.dtsi +++ b/arch/arm/boot/dts/sunxi-bananapi-m2-plus-v1.2.dtsi @@ -16,12 +16,12 @@ reg_vdd_cpux: vdd-cpux { regulator-type = "voltage"; regulator-boot-on; regulator-always-on; - regulator-min-microvolt = <1100000>; - regulator-max-microvolt = <1300000>; + regulator-min-microvolt = <1108475>; + regulator-max-microvolt = <1308475>; regulator-ramp-delay = <50>; /* 4ms */ gpios = <&r_pio 0 1 GPIO_ACTIVE_HIGH>; /* PL1 */ gpios-states = <0x1>; - states = <1100000 0>, <1300000 1>; + states = <1108475 0>, <1308475 1>; }; }; -- 2.27.0
WARNING: multiple messages have this Message-ID (diff)
From: Chen-Yu Tsai <wens@kernel.org> To: Maxime Ripard <mripard@kernel.org> Cc: devicetree@vger.kernel.org, Chen-Yu Tsai <wens@csie.org>, Rob Herring <robh+dt@kernel.org>, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 3/8] ARM: dts: sunxi: bananapi-m2-plus-v1.2: Fix CPU supply voltages Date: Sat, 18 Jul 2020 00:00:48 +0800 [thread overview] Message-ID: <20200717160053.31191-4-wens@kernel.org> (raw) In-Reply-To: <20200717160053.31191-1-wens@kernel.org> From: Chen-Yu Tsai <wens@csie.org> The Bananapi M2+ uses a GPIO line to change the effective resistance of the CPU supply regulator's feedback resistor network. The voltages described in the device tree were given directly by the vendor. This turns out to be slightly off compared to the real values. The updated voltages are based on calculations of the feedback resistor network, and verified down to three decimal places with a multi-meter. Fixes: 6eeb4180d4b9 ("ARM: dts: sunxi: h3-h5: Add Bananapi M2+ v1.2 device trees") Signed-off-by: Chen-Yu Tsai <wens@csie.org> --- arch/arm/boot/dts/sunxi-bananapi-m2-plus-v1.2.dtsi | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/arm/boot/dts/sunxi-bananapi-m2-plus-v1.2.dtsi b/arch/arm/boot/dts/sunxi-bananapi-m2-plus-v1.2.dtsi index a628b5ee72b6..235994a4a2eb 100644 --- a/arch/arm/boot/dts/sunxi-bananapi-m2-plus-v1.2.dtsi +++ b/arch/arm/boot/dts/sunxi-bananapi-m2-plus-v1.2.dtsi @@ -16,12 +16,12 @@ reg_vdd_cpux: vdd-cpux { regulator-type = "voltage"; regulator-boot-on; regulator-always-on; - regulator-min-microvolt = <1100000>; - regulator-max-microvolt = <1300000>; + regulator-min-microvolt = <1108475>; + regulator-max-microvolt = <1308475>; regulator-ramp-delay = <50>; /* 4ms */ gpios = <&r_pio 0 1 GPIO_ACTIVE_HIGH>; /* PL1 */ gpios-states = <0x1>; - states = <1100000 0>, <1300000 1>; + states = <1108475 0>, <1308475 1>; }; }; -- 2.27.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-07-17 16:01 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-17 16:00 [PATCH v2 0/8] arm64: dts: allwinner: h5: Enable CPU DVFS (cpufreq) Chen-Yu Tsai 2020-07-17 16:00 ` Chen-Yu Tsai 2020-07-17 16:00 ` [PATCH v2 1/8] ARM: dts: sunxi: libretech-all-h3-cc: Add regulator supply to all CPU cores Chen-Yu Tsai 2020-07-17 16:00 ` Chen-Yu Tsai 2020-07-17 16:00 ` [PATCH v2 2/8] ARM: dts: sunxi: bananapi-m2-plus-v1.2: " Chen-Yu Tsai 2020-07-17 16:00 ` Chen-Yu Tsai 2020-07-17 16:00 ` Chen-Yu Tsai [this message] 2020-07-17 16:00 ` [PATCH v2 3/8] ARM: dts: sunxi: bananapi-m2-plus-v1.2: Fix CPU supply voltages Chen-Yu Tsai 2020-07-17 16:00 ` [PATCH v2 4/8] arm64: dts: allwinner: h5: Add clock to CPU cores Chen-Yu Tsai 2020-07-17 16:00 ` Chen-Yu Tsai 2020-07-17 16:00 ` [PATCH v2 5/8] arm64: dts: allwinner: h5: Add trip and cooling maps to CPU thermal zones Chen-Yu Tsai 2020-07-17 16:00 ` Chen-Yu Tsai 2020-07-17 16:00 ` [PATCH v2 6/8] arm64: dts: allwinner: h5: Add CPU Operating Performance Points table Chen-Yu Tsai 2020-07-17 16:00 ` Chen-Yu Tsai 2020-07-17 16:00 ` [PATCH v2 7/8] arm64: dts: allwinner: h5: libretech-all-h3-cc: Tie in CPU OPPs Chen-Yu Tsai 2020-07-17 16:00 ` Chen-Yu Tsai 2020-07-17 16:00 ` [PATCH v2 8/8] arm64: dts: allwinner: h5: bananapi-m2-plus-v1.2: " Chen-Yu Tsai 2020-07-17 16:00 ` Chen-Yu Tsai 2020-07-20 14:11 ` [PATCH v2 0/8] arm64: dts: allwinner: h5: Enable CPU DVFS (cpufreq) Maxime Ripard 2020-07-20 14:11 ` Maxime Ripard
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