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arm64: dts: allwinner: pinebook: Fix backlight regulator

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The output from the backlight regulator is labeled as "VBKLT" in the
schematic. Using the equation and resistor values from the schematic,
the output is approximately 18V, not 3.3V. Since the regulator in use
(SS6640STR) is a boost regulator powered by PS (battery or AC input),
which are both >3.3V, the output could not be 3.3V anyway.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
This commit is contained in:
Samuel Holland 2020-01-19 10:31:03 -06:00 committed by Maxime Ripard
parent 9de2b6bf5e
commit 47ef030c3a
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GPG Key ID: E3EF0D6F671851C5
1 changed files with 10 additions and 10 deletions
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20
arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts
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@ -21,22 +21,13 @@ aliases {
ethernet0 = &rtl8723cs;
};
vdd_bl: regulator@0 {
compatible = "regulator-fixed";
regulator-name = "bl-3v3";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
gpio = <&pio 7 6 GPIO_ACTIVE_HIGH>; /* PH6 */
enable-active-high;
};
backlight: backlight {
compatible = "pwm-backlight";
pwms = <&pwm 0 50000 0>;
brightness-levels = <0 5 10 15 20 30 40 55 70 85 100>;
default-brightness-level = <2>;
enable-gpios = <&pio 3 23 GPIO_ACTIVE_HIGH>; /* PD23 */
power-supply = <&vdd_bl>;
power-supply = <&reg_vbklt>;
};
chosen {
@ -57,6 +48,15 @@ lid_switch {
};
};
reg_vbklt: vbklt {
compatible = "regulator-fixed";
regulator-name = "vbklt";
regulator-min-microvolt = <18000000>;
regulator-max-microvolt = <18000000>;
gpio = <&pio 7 6 GPIO_ACTIVE_HIGH>; /* PH6 */
enable-active-high;
};
wifi_pwrseq: wifi_pwrseq {
compatible = "mmc-pwrseq-simple";
reset-gpios = <&r_pio 0 2 GPIO_ACTIVE_LOW>; /* PL2 */