diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/twl6030.c | 77 |
1 files changed, 67 insertions, 10 deletions
diff --git a/drivers/power/twl6030.c b/drivers/power/twl6030.c index 0858b60..a1c6663 100644 --- a/drivers/power/twl6030.c +++ b/drivers/power/twl6030.c @@ -9,6 +9,26 @@ #include <twl6030.h> +static struct twl6030_data *twl; + +static struct twl6030_data twl6030_info = { + .chip_type = chip_TWL6030, + .adc_rbase = GPCH0_LSB, + .adc_ctrl = CTRL_P2, + .adc_enable = CTRL_P2_SP2, + .vbat_mult = TWL6030_VBAT_MULT, + .vbat_shift = TWL6030_VBAT_SHIFT, +}; + +static struct twl6030_data twl6032_info = { + .chip_type = chip_TWL6032, + .adc_rbase = TWL6032_GPCH0_LSB, + .adc_ctrl = TWL6032_CTRL_P1, + .adc_enable = CTRL_P1_SP1, + .vbat_mult = TWL6032_VBAT_MULT, + .vbat_shift = TWL6032_VBAT_SHIFT, +}; + static int twl6030_gpadc_read_channel(u8 channel_no) { u8 lsb = 0; @@ -16,12 +36,12 @@ static int twl6030_gpadc_read_channel(u8 channel_no) int ret = 0; ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC, - GPCH0_LSB + channel_no * 2, &lsb); + twl->adc_rbase + channel_no * 2, &lsb); if (ret) return ret; ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC, - GPCH0_MSB + channel_no * 2, &msb); + twl->adc_rbase + 1 + channel_no * 2, &msb); if (ret) return ret; @@ -33,7 +53,8 @@ static int twl6030_gpadc_sw2_trigger(void) u8 val; int ret = 0; - ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC, CTRL_P2, CTRL_P2_SP2); + ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC, + twl->adc_ctrl, twl->adc_enable); if (ret) return ret; @@ -41,7 +62,8 @@ static int twl6030_gpadc_sw2_trigger(void) val = CTRL_P2_BUSY; while (!((val & CTRL_P2_EOCP2) && (!(val & CTRL_P2_BUSY)))) { - ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC, CTRL_P2, &val); + ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC, + twl->adc_ctrl, &val); if (ret) return ret; udelay(1000); @@ -102,6 +124,18 @@ int twl6030_get_battery_voltage(void) { int battery_volt = 0; int ret = 0; + u8 vbatch; + + if (twl->chip_type == chip_TWL6030) { + vbatch = TWL6030_GPADC_VBAT_CHNL; + } else { + ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC, + TWL6032_GPSELECT_ISB, + TWL6032_GPADC_VBAT_CHNL); + if (ret) + return ret; + vbatch = 0; + } /* Start GPADC SW conversion */ ret = twl6030_gpadc_sw2_trigger(); @@ -111,12 +145,12 @@ int twl6030_get_battery_voltage(void) } /* measure Vbat voltage */ - battery_volt = twl6030_gpadc_read_channel(7); + battery_volt = twl6030_gpadc_read_channel(vbatch); if (battery_volt < 0) { printf("Failed to read battery voltage\n"); return ret; } - battery_volt = (battery_volt * 25 * 1000) >> (10 + 2); + battery_volt = (battery_volt * twl->vbat_mult) >> twl->vbat_shift; printf("Battery Voltage: %d mV\n", battery_volt); return battery_volt; @@ -124,12 +158,35 @@ int twl6030_get_battery_voltage(void) void twl6030_init_battery_charging(void) { - u8 stat1 = 0; + u8 val = 0; int battery_volt = 0; int ret = 0; + ret = twl6030_i2c_read_u8(TWL6030_CHIP_USB, USB_PRODUCT_ID_LSB, &val); + if (ret) { + puts("twl6030_init_battery_charging(): could not determine chip!\n"); + return; + } + if (val == 0x30) { + twl = &twl6030_info; + } else if (val == 0x32) { + twl = &twl6032_info; + } else { + puts("twl6030_init_battery_charging(): unsupported chip type\n"); + return; + } + /* Enable VBAT measurement */ - twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC1, VBAT_MEAS); + if (twl->chip_type == chip_TWL6030) { + twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC1, VBAT_MEAS); + twl6030_i2c_write_u8(TWL6030_CHIP_ADC, + TWL6030_GPADC_CTRL, + GPADC_CTRL_SCALER_DIV4); + } else { + twl6030_i2c_write_u8(TWL6030_CHIP_ADC, + TWL6032_GPADC_CTRL2, + GPADC_CTRL2_CH18_SCALER_EN); + } /* Enable GPADC module */ ret = twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, TOGGLE1, FGS | GPADCS); @@ -146,10 +203,10 @@ void twl6030_init_battery_charging(void) printf("Main battery voltage too low!\n"); /* Check for the presence of USB charger */ - twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, CONTROLLER_STAT1, &stat1); + twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, CONTROLLER_STAT1, &val); /* check for battery presence indirectly via Fuel gauge */ - if ((stat1 & VBUS_DET) && (battery_volt < 3300)) + if ((val & VBUS_DET) && (battery_volt < 3300)) twl6030_start_usb_charging(); return; |