[rk3288/rk3399][Android] 系统休眠唤醒

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rockchip 休眠唤醒

• 为降低系统功耗，在设备空闲时使其进入休眠状态
• rk3288 rk3399有多路pwm，休眠状态下可修改其电压值，唤醒后恢复
  

代码修改

这部分功能rockchip 已经实现，只需将dts中rockchip-suspend使能即可

rockchip_suspend: rockchip-suspend {
       compatible = "rockchip,pm-rk3288";
       status = "okay";
       rockchip,sleep-mode-config = <
              (0
              |RKPM_CTR_PWR_DMNS
              |RKPM_CTR_GTCLKS
              |RKPM_CTR_PLLS
              |RKPM_CTR_ARMOFF_LPMD
              |RKPM_CTR_SYSCLK_OSC_DIS
              )
       >;
       rockchip,wakeup-config = <
              (0
              | RKPM_GPIO_WKUP_EN
              )
       >;
       rockchip,pwm-regulator-config = <
              (0
              | PWM2_REGULATOR_EN
              )
       >;
};