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mfd: rk808: Disable the under voltage detect

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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 <zyw@rock-chips.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Chris Zhong 2015-02-28 18:09:06 +08:00 committed by Lee Jones
parent 9a503a7d9c
commit e19f742885
2 changed files with 4 additions and 0 deletions
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1
drivers/mfd/rk808.c
View File

@ -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 },
};

3
include/linux/mfd/rk808.h
View File

@ -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)