diff options
Diffstat (limited to 'board/st/u8500/u8500.c')
| -rw-r--r-- | board/st/u8500/u8500.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/board/st/u8500/u8500.c b/board/st/u8500/u8500.c index 621a168d6..8b4609bf5 100644 --- a/board/st/u8500/u8500.c +++ b/board/st/u8500/u8500.c @@ -297,17 +297,42 @@ static void probe_href(void) } +#define BATT_OK_SEL1_TH_F_MASK 0xF0 +#define BATT_OK_SEL1_TH_F_2V71 0x70 + /* * board_early_access - for functionality that needs to run before * board_late_init but after board_init and emmc init. */ int board_early_access(block_dev_desc_t *block_dev) { + int ret; + int battok_regval; /* set board_id according to HREF version */ probe_href(); /* + * In AB8500 rev2.0, the cut-off voltage threshold is set too low + * and the AB will power-off when we start with a drained battery + * and a charger connected when the backlight is turned on. + * Here we will lower the cut-off voltage threshold before + * power consumption goes up + */ + ret = ab8500_read(AB8500_SYS_CTRL2_BLOCK, AB8500_BATT_OK_REG); + if (ret < 0) + return -EINVAL; + + battok_regval = ret; + + /* Mask and set BattOkSel1ThF */ + ret = ab8500_write(AB8500_SYS_CTRL2_BLOCK, AB8500_BATT_OK_REG, + (battok_regval & ~BATT_OK_SEL1_TH_F_MASK) | + BATT_OK_SEL1_TH_F_2V71); + if (ret < 0) + return -EINVAL; + + /* * Don't load itp, modem and splash if restarted (eg crashdump). */ if (!(data_init_flag > 0)) { |