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>

diff --git a/drivers/power/twl6030.c b/drivers/power/twl6030.c
index 6bf1a33286400e85f25dafd4161e6ca69c2be572..a1c6663a2e3f913f9245e8343321777c4ac62327 100644 (file)
--- 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;

diff --git a/include/twl6030.h b/include/twl6030.h
index 9399737ad363e6a5d77fdf33b90946b779899185..7898699eac876a771614b02dc3013a01c473e0b5 100644 (file)
--- a/include/twl6030.h
+++ b/include/twl6030.h
@@ -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
 };