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Commit e19f7428 authored by Chris Zhong's avatar Chris Zhong Committed by Lee Jones
Browse files

mfd: rk808: Disable the under voltage detect 



Rk808 has a under voltage detect function, when the voltage of buck is
under 85% the target voltage, the buck output will reset. But if the
power load is too heavy, this function maybe err, when current over
4.2A, although the voltage is normal, but RK808 mistakenly think it is
under 85%, and reset the buck. So let's disable this function.

Signed-off-by: default avatarChris Zhong <zyw@rock-chips.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 9a503a7d

drivers/mfd/rk808.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -89,6 +89,7 @@ static const struct rk808_reg_data pre_init_reg[] = { 
	{ RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },

	{ RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },

	{ RK808_BUCK1_CONFIG_REG, BUCK1_RATE_MASK,  BUCK_ILMIN_200MA },

	{ RK808_BUCK1_CONFIG_REG, BUCK1_RATE_MASK,  BUCK_ILMIN_200MA },

	{ RK808_BUCK2_CONFIG_REG, BUCK2_RATE_MASK,  BUCK_ILMIN_200MA },

	{ RK808_BUCK2_CONFIG_REG, BUCK2_RATE_MASK,  BUCK_ILMIN_200MA },

	{ RK808_DCDC_UV_ACT_REG,  BUCK_UV_ACT_MASK, BUCK_UV_ACT_DISABLE},

	{ RK808_VB_MON_REG,       MASK_ALL,         VB_LO_ACT |

	{ RK808_VB_MON_REG,       MASK_ALL,         VB_LO_ACT |

						    VB_LO_SEL_3500MV },

						    VB_LO_SEL_3500MV },

};

};

include/linux/mfd/rk808.h

+3 −0
Original line number Original line Diff line number Diff line
@@ -156,6 +156,9 @@ enum rk808_reg { 
#define BUCK2_RATE_MASK		(3 << 3)

#define BUCK2_RATE_MASK		(3 << 3)

#define MASK_ALL	0xff

#define MASK_ALL	0xff





#define BUCK_UV_ACT_MASK	0x0f

#define BUCK_UV_ACT_DISABLE	0



#define SWITCH2_EN	BIT(6)

#define SWITCH2_EN	BIT(6)

#define SWITCH1_EN	BIT(5)

#define SWITCH1_EN	BIT(5)

#define DEV_OFF_RST	BIT(3)

#define DEV_OFF_RST	BIT(3)