Messages in this thread Patch in this message | | | From | Samuel Holland <> | Subject | [PATCH 8/9] arm64: dts: allwinner: pinebook: Fix backlight regulator | Date | Sun, 19 Jan 2020 10:31:03 -0600 |
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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> --- .../dts/allwinner/sun50i-a64-pinebook.dts | 20 +++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts index 3e762f93671a..96434fdeb5c0 100644 --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts @@ -21,22 +21,13 @@ 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 = <®_vbklt>; }; chosen { @@ -57,6 +48,15 @@ }; }; + 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 */ -- 2.23.0
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