From 7a169615cf79c22f3c98dcc36d60e02d6520d92f Mon Sep 17 00:00:00 2001 From: Chris Zhong Date: Sat, 28 Feb 2015 18:09:06 +0800 Subject: [PATCH] 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: Chris Zhong Signed-off-by: Lee Jones --- drivers/mfd/rk808.c | 1 + include/linux/mfd/rk808.h | 3 +++ 2 files changed, 4 insertions(+) diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c index bd02150698759..7cf25c7c8d813 100644 --- a/drivers/mfd/rk808.c +++ b/drivers/mfd/rk808.c @@ -89,6 +89,7 @@ static const struct rk808_reg_data pre_init_reg[] = { { RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA }, { RK808_BUCK1_CONFIG_REG, BUCK1_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 | VB_LO_SEL_3500MV }, }; diff --git a/include/linux/mfd/rk808.h b/include/linux/mfd/rk808.h index fb09312d854bd..441b6ee726910 100644 --- a/include/linux/mfd/rk808.h +++ b/include/linux/mfd/rk808.h @@ -156,6 +156,9 @@ enum rk808_reg { #define BUCK2_RATE_MASK (3 << 3) #define MASK_ALL 0xff +#define BUCK_UV_ACT_MASK 0x0f +#define BUCK_UV_ACT_DISABLE 0 + #define SWITCH2_EN BIT(6) #define SWITCH1_EN BIT(5) #define DEV_OFF_RST BIT(3) -- 2.39.5