3 * Texas Instruments, <www.ti.com>
5 * SPDX-License-Identifier: GPL-2.0+
8 #ifdef CONFIG_TWL6030_POWER
12 static int twl6030_gpadc_read_channel(u8 channel_no)
18 ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
19 GPCH0_LSB + channel_no * 2, &lsb);
23 ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
24 GPCH0_MSB + channel_no * 2, &msb);
28 return (msb << 8) | lsb;
31 static int twl6030_gpadc_sw2_trigger(void)
36 ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC, CTRL_P2, CTRL_P2_SP2);
40 /* Waiting until the SW1 conversion ends*/
43 while (!((val & CTRL_P2_EOCP2) && (!(val & CTRL_P2_BUSY)))) {
44 ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC, CTRL_P2, &val);
53 void twl6030_stop_usb_charging(void)
55 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1, 0);
60 void twl6030_start_usb_charging(void)
62 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
63 CHARGERUSB_VICHRG, CHARGERUSB_VICHRG_1500);
64 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
65 CHARGERUSB_CINLIMIT, CHARGERUSB_CIN_LIMIT_NONE);
66 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
67 CONTROLLER_INT_MASK, MBAT_TEMP);
68 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
69 CHARGERUSB_INT_MASK, MASK_MCHARGERUSB_THMREG);
70 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
71 CHARGERUSB_VOREG, CHARGERUSB_VOREG_4P0);
72 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
73 CHARGERUSB_CTRL2, CHARGERUSB_CTRL2_VITERM_400);
74 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL1, TERM);
75 /* Enable USB charging */
76 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
77 CONTROLLER_CTRL1, CONTROLLER_CTRL1_EN_CHARGER);
81 int twl6030_get_battery_current(void)
83 int battery_current = 0;
87 twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_11, &msb);
88 twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_10, &lsb);
89 battery_current = ((msb << 8) | lsb);
91 /* convert 10 bit signed number to 16 bit signed number */
92 if (battery_current >= 0x2000)
93 battery_current = (battery_current - 0x4000);
95 battery_current = battery_current * 3000 / 4096;
96 printf("Battery Current: %d mA\n", battery_current);
98 return battery_current;
101 int twl6030_get_battery_voltage(void)
103 int battery_volt = 0;
106 /* Start GPADC SW conversion */
107 ret = twl6030_gpadc_sw2_trigger();
109 printf("Failed to convert battery voltage\n");
113 /* measure Vbat voltage */
114 battery_volt = twl6030_gpadc_read_channel(7);
115 if (battery_volt < 0) {
116 printf("Failed to read battery voltage\n");
119 battery_volt = (battery_volt * 25 * 1000) >> (10 + 2);
120 printf("Battery Voltage: %d mV\n", battery_volt);
125 void twl6030_init_battery_charging(void)
128 int battery_volt = 0;
131 /* Enable VBAT measurement */
132 twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC1, VBAT_MEAS);
134 /* Enable GPADC module */
135 ret = twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, TOGGLE1, FGS | GPADCS);
137 printf("Failed to enable GPADC\n");
141 battery_volt = twl6030_get_battery_voltage();
142 if (battery_volt < 0)
145 if (battery_volt < 3000)
146 printf("Main battery voltage too low!\n");
148 /* Check for the presence of USB charger */
149 twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, CONTROLLER_STAT1, &stat1);
151 /* check for battery presence indirectly via Fuel gauge */
152 if ((stat1 & VBUS_DET) && (battery_volt < 3300))
153 twl6030_start_usb_charging();
158 void twl6030_power_mmc_init()
160 /* set voltage to 3.0 and turnon for APP */
161 twl6030_i2c_write_u8(TWL6030_CHIP_PM, VMMC_CFG_VOLTATE, 0x15);
162 twl6030_i2c_write_u8(TWL6030_CHIP_PM, VMMC_CFG_STATE, 0x21);
165 void twl6030_usb_device_settings()
169 /* Select APP Group and set state to ON */
170 twl6030_i2c_write_u8(TWL6030_CHIP_PM, VUSB_CFG_STATE, 0x21);
172 twl6030_i2c_read_u8(TWL6030_CHIP_PM, MISC2, &data);
175 /* Select the input supply for VBUS regulator */
176 twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC2, data);