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[01/10] ARM: dts: sunxi: bananapi-m2-plus-v1.2: Fix CPU supply voltages

Message ID 20190130084203.25053-2-wens@csie.org
State New, archived
Headers show
Series arm64: dts: allwinner: h5: Enable CPU DVFS (cpufreq) | expand

Commit Message

Chen-Yu Tsai Jan. 30, 2019, 8:41 a.m. UTC
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 | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
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Patch

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 53edd1faee99..a567567763f4 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
@@ -16,13 +16,13 @@ 
 		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 0x0
-			  1300000 0x1>;
+		states = <1108475 0x0
+			  1308475 0x1>;
 	};
 };