diff options
| -rw-r--r-- | driver/charger/isl9241.c | 56 | ||||
| -rw-r--r-- | driver/charger/isl9241.h | 10 |
2 files changed, 66 insertions, 0 deletions
diff --git a/driver/charger/isl9241.c b/driver/charger/isl9241.c index de6110a02b..41d649d1c3 100644 --- a/driver/charger/isl9241.c +++ b/driver/charger/isl9241.c @@ -308,6 +308,14 @@ static void isl9241_init(void) reg | ISL9241_CONTROL3_ACLIM_RELOAD)) goto init_fail; +#ifndef CONFIG_CHARGE_RAMP_HW + if (isl9241_read(ISL9241_REG_CONTROL0, ®)) + goto init_fail; + if (isl9241_write(ISL9241_REG_CONTROL0, + reg | ISL9241_CONTROL0_INPUT_VTG_REGULATION)) + goto init_fail; +#endif + /* * No need to proceed with the rest of init if we sysjump'd to this * image as the input current limit has already been set. @@ -327,6 +335,54 @@ init_fail: DECLARE_HOOK(HOOK_INIT, isl9241_init, HOOK_PRIO_INIT_I2C + 1); /*****************************************************************************/ +/* Hardware current ramping */ + +#ifdef CONFIG_CHARGE_RAMP_HW +int charger_set_hw_ramp(int enable) +{ + int rv, reg; + + rv = isl9241_read(ISL9241_REG_CONTROL0, ®); + if (rv) + return rv; + + /* HW ramp is controlled by input voltage regulation reference bits */ + if (enable) + reg &= ~ISL9241_CONTROL0_INPUT_VTG_REGULATION; + else + reg |= ISL9241_CONTROL0_INPUT_VTG_REGULATION; + + return isl9241_write(ISL9241_REG_CONTROL0, reg); +} + +int chg_ramp_is_stable(void) +{ + /* + * Since ISL cannot read the current limit that the ramp has settled + * on, then we can never consider the ramp stable, because we never + * know what the stable limit is. + */ + return 0; +} + +int chg_ramp_is_detected(void) +{ + return 1; +} + +int chg_ramp_get_current_limit(void) +{ + int reg; + + if (isl9241_read(ISL9241_REG_IADP_ADC_RESULTS, ®)) + return 0; + + /* LSB value of register = 22.2mA */ + return (reg * 222) / 10; +} +#endif /* CONFIG_CHARGE_RAMP_HW */ + +/*****************************************************************************/ #ifdef CONFIG_CMD_CHARGER_DUMP static void dump_reg_range(int low, int high) { diff --git a/driver/charger/isl9241.h b/driver/charger/isl9241.h index b0be2cb188..f2d4f1493d 100644 --- a/driver/charger/isl9241.h +++ b/driver/charger/isl9241.h @@ -34,7 +34,12 @@ #define ISL9241_REG_MAX_SYSTEM_VOLTAGE 0x15 #define ISL9241_REG_CONTROL7 0x38 + +/* Configures various charger options */ #define ISL9241_REG_CONTROL0 0x39 +/* 2: Input Voltage Regulation (0 = Enable (default), 1 = Disable) */ +#define ISL9241_CONTROL0_INPUT_VTG_REGULATION BIT(2) + #define ISL9241_REG_INFORMATION1 0x3A #define ISL9241_REG_ADAPTER_CUR_LIMIT2 0x3B @@ -71,6 +76,8 @@ #define ISL9241_REG_DC_PROCHOT 0x48 #define ISL9241_REG_OTG_VOLTAGE 0x49 #define ISL9241_REG_OTG_CURRENT 0x4A + +/* VIN Voltage (ADP Min Voltage) (default 4.096V) */ #define ISL9241_REG_VIN_VOLTAGE 0x4B /* Configures various charger options */ @@ -92,7 +99,10 @@ #define ISL9241_REG_NTC_ADC_RESULTS 0x80 #define ISL9241_REG_VBAT_ADC_RESULTS 0x81 #define ISL9241_REG_TJ_ADC_RESULTS 0x82 + +/* ADC result for adapter current measurements, LSB = 22.2mA */ #define ISL9241_REG_IADP_ADC_RESULTS 0x83 + #define ISL9241_REG_DC_ADC_RESULTS 0x84 #define ISL9241_REG_CC_ADC_RESULTS 0x85 #define ISL9241_REG_VSYS_ADC_RESULTS 0x86 |