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ARMV7: OMAP4: Add twl6032 support

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Added chip type detection and twl6032
support in the battery control
and charge functions.

Based on Balaji T K <balajitk@ti.com> patches for TI u-boot.

Signed-off-by: Oleg Kosheliev <oleg.kosheliev@ti.com>
This commit is contained in:
Oleg Kosheliev 2013-10-08 15:49:56 +03:00 committed by Tom Rini
parent fc8895035b
commit 340e6c8300
2 changed files with 68 additions and 6 deletions
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54
drivers/power/twl6030.c
View file

@ -20,6 +20,15 @@ static struct twl6030_data twl6030_info = {
.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;
@ -115,6 +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();
@ -124,7 +145,7 @@ 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;
@ -137,14 +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;
twl = &twl6030_info;
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);
@ -161,10 +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;

20
include/twl6030.h
View file

@ -110,15 +110,35 @@
#define CTRL_P2_EOCP2 (1 << 1)
#define CTRL_P2_BUSY (1 << 0)
#define TWL6032_CTRL_P1 0x36
#define CTRL_P1_SP1 (1 << 3)
#define GPCH0_LSB 0x57
#define GPCH0_MSB 0x58
#define TWL6032_GPCH0_LSB 0x3b
#define TWL6032_GPSELECT_ISB 0x35
#define USB_PRODUCT_ID_LSB 0x02
#define TWL6030_GPADC_VBAT_CHNL 0x07
#define TWL6032_GPADC_VBAT_CHNL 0x12
#define TWL6030_GPADC_CTRL 0x2e
#define TWL6032_GPADC_CTRL2 0x2f
#define GPADC_CTRL2_CH18_SCALER_EN (1 << 2)
#define GPADC_CTRL_SCALER_DIV4 (1 << 3)
#define TWL6030_VBAT_MULT 40 * 1000
#define TWL6032_VBAT_MULT 25 * 1000
#define TWL6030_VBAT_SHIFT (10 + 3)
#define TWL6032_VBAT_SHIFT (12 + 2)
enum twl603x_chip_type{
chip_TWL6030,
chip_TWL6032,
chip_TWL603X_cnt
};