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arm64: dts: rockchip: rk3399: change the parameter of vdd_log.

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There is a hardware mistake on firefly board, it will cause the
vdd_log is too low based on previous parameter, so we change the
pwm parameter to make sure the vdd_log is about 0.9v.

Change-Id: I2d63cfe201c02a1351eebae21d1c7d449385087e
Signed-off-by: Wenping Zhang <wenping.zhang@rock-chips.com>
This commit is contained in:
Wenping Zhang 2018-09-25 15:54:10 +08:00 committed by Tao Huang
parent 9d1403971f
commit 87dc89966c
2 changed files with 16 additions and 2 deletions
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9
arch/arm64/boot/dts/rockchip/rk3399-firefly-android.dts
View File

@ -338,7 +338,14 @@ vdd_log: vdd-log {
pwms = <&pwm2 0 25000 1>;
regulator-name = "vdd_log";
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <1400000>;
/*
* the firefly hardware using 3.0 v as APIO2_VDD
* voltage, but the pwm divider resistance is designed
* based on hardware which the APIO2_VDD is 1.8v, so we
* need to change the regulator-max-microvolt from 1.4v
* to 1.0v, so the pwm can output 0.9v voltage.
*/
regulator-max-microvolt = <1000000>;
regulator-always-on;
regulator-boot-on;

9
arch/arm64/boot/dts/rockchip/rk3399-firefly-linux.dts
View File

@ -287,7 +287,14 @@ vdd_log: vdd-log {
pwms = <&pwm2 0 25000 1>;
regulator-name = "vdd_log";
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <1400000>;
/*
* the firefly hardware using 3.0 v as APIO2_VDD
* voltage, but the pwm divider resistance is designed
* based on hardware which the APIO2_VDD is 1.8v, so we
* need to change the regulator-max-microvolt from 1.4v
* to 1.0v, so the pwm can output 0.9v voltage.
*/
regulator-max-microvolt = <1000000>;
regulator-always-on;
regulator-boot-on;