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标题: rk3128 pmu供电方式为DC-DC，如何配置logic arm电压 [打印本页]

作者: Jensum 时间: 2019-3-6 16:39
标题: rk3128 pmu供电方式为DC-DC，如何配置logic arm电压
rk3128平台，供电方式硬件控制，输出PWM调节vdd_arm,vdd_logic电压，请问如何在dts上配置？
以下是我的改动：
Disable rk818
+&rk818 {
+ status = "disabled";
+};
Enable pwm_regulator1 pwm_regulator2
compatible = "rockchip_pwm_regulator";
pwms = <&pwm1 0 25000>;
rockchip,pwm_id= <1>;
rockchip,pwm_voltage_map= <950000 975000 1000000 1025000 1050000 1075000 1100000 1125000 1150000 1175000 1200000 1225000 1250000 1275000 1300000 1325000 1350000 1375000 1400000 1425000 1450000>;
rockchip,pwm_voltage= <1250000>;
rockchip,pwm_min_voltage= <950000>;
rockchip,pwm_max_voltage= <1450000>;
rockchip,pwm_suspend_voltage= <1250000>;
rockchip,pwm_coefficient= <550>;
- status = "disabled";
+ status = "okay";
regulators {

跑板子的时候，从log看pwm-regulator驱动没办法probe成功
[ 7.295157] pwm-voltage-regulator pwm-regulator1.18: unable to request PWM, trying legacy API
[ 7.295189] pwm-voltage-regulator pwm-regulator1.18: unable to request legacy PWM
[ 7.295208] pwm_regulator_probe:error
[ 7.295246] platform pwm-regulator1.18: Driver pwm-voltage-regulator requests probe deferral
[ 7.295383] pwm-voltage-regulator pwm-regulator2.19: unable to request PWM, trying legacy API
[ 7.295411] pwm-voltage-regulator pwm-regulator2.19: unable to request legacy PWM
[ 7.295429] pwm_regulator_probe:error
[ 7.295463] platform pwm-regulator2.19: Driver pwm-voltage-regulator requests probe deferral
把 &pwm1 &pwm2打开后，跑kernel会突然挂掉

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