regulator: rk808: Add RK809 and RK817 support.

    Add support for the rk809 and rk817 regulator driver.
    Their specifications are as follows：
    1. The RK809 and RK809 consist of 5 DCDCs, 9 LDOs
       and have the same registers for these components except dcdc5.
    2. The dcdc5 is a boost dcdc for RK817 and is a buck for RK809.
    3. The RK817 has one switch but The Rk809 has two.

    The output voltages are configurable and are meant to supply power
    to the main processor and other components.
Signed-off-by: Tony Xie <tony.xie@rock-chips.com>
Acked-by: Mark Brown <broonie@kernel.org>
[rebased on top of 5.2-rc1]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/regulator/Kconfig

@@ -762,11 +762,11 @@ config REGULATOR_RC5T583
 	  outputs which can be controlled by i2c communication.
 
 config REGULATOR_RK808
-	tristate "Rockchip RK805/RK808/RK818 Power regulators"
+	tristate "Rockchip RK805/RK808/RK809/RK817/RK818 Power regulators"
 	depends on MFD_RK808
 	help
 	  Select this option to enable the power regulator of ROCKCHIP
-	  PMIC RK805,RK808 and RK818.
+	  PMIC RK805,RK809&RK817,RK808 and RK818.
 	  This driver supports the control of different power rails of device
 	  through regulator interface. The device supports multiple DCDC/LDO
 	  outputs which can be controlled by i2c communication.

include/linux/mfd/rk808.h

@@ -396,7 +396,10 @@ enum rk805_reg {
 #define SHUTDOWN_FUN			(0x2 << 2)
 #define SLEEP_FUN			(0x1 << 2)
 #define RK8XX_ID_MSK			0xfff0
+#define PWM_MODE_MSK			BIT(7)
 #define FPWM_MODE			BIT(7)
+#define AUTO_PWM_MODE			0
+
 enum rk817_reg_id {
 	RK817_ID_DCDC1 = 0,
 	RK817_ID_DCDC2,