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authorOleg Kosheliev <oleg.kosheliev@ti.com>2013-10-08 15:49:56 +0300
committerTom Rini <trini@ti.com>2013-12-04 08:11:28 -0500
commit340e6c830053846d48ba97a73adfac3f5cadfd7e (patch)
tree91fb4a614129f0e577d9e019f49b2a1032257c52 /drivers/power
parentfc8895035b0d00d22d4edc6b327cb1805baa5872 (diff)
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ARMV7: OMAP4: Add twl6032 support
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>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/twl6030.c54
1 files changed, 48 insertions, 6 deletions
diff --git a/drivers/power/twl6030.c b/drivers/power/twl6030.c
index 6bf1a33..a1c6663 100644
--- a/drivers/power/twl6030.c
+++ b/drivers/power/twl6030.c
@@ -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;