1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2012 4 * Henrik Nordstrom <henrik@henriknordstrom.net> 5 */ 6 7 #include <common.h> 8 #include <command.h> 9 #include <asm/arch/pmic_bus.h> 10 #include <axp_pmic.h> 11 12 #ifdef CONFIG_AXP_ALDO3_VOLT_SLOPE_08 13 # define AXP209_VRC_SLOPE AXP209_VRC_LDO3_800uV_uS 14 #endif 15 #ifdef CONFIG_AXP_ALDO3_VOLT_SLOPE_16 16 # define AXP209_VRC_SLOPE AXP209_VRC_LDO3_1600uV_uS 17 #endif 18 #if defined CONFIG_AXP_ALDO3_VOLT_SLOPE_NONE || !defined AXP209_VRC_SLOPE 19 # define AXP209_VRC_SLOPE 0x00 20 #endif 21 22 static u8 axp209_mvolt_to_cfg(int mvolt, int min, int max, int div) 23 { 24 if (mvolt < min) 25 mvolt = min; 26 else if (mvolt > max) 27 mvolt = max; 28 29 return (mvolt - min) / div; 30 } 31 32 int axp_set_dcdc2(unsigned int mvolt) 33 { 34 int rc; 35 u8 cfg, current; 36 37 if (mvolt == 0) 38 return pmic_bus_clrbits(AXP209_OUTPUT_CTRL, 39 AXP209_OUTPUT_CTRL_DCDC2); 40 41 rc = pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_DCDC2); 42 if (rc) 43 return rc; 44 45 cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25); 46 47 /* Do we really need to be this gentle? It has built-in voltage slope */ 48 while ((rc = pmic_bus_read(AXP209_DCDC2_VOLTAGE, ¤t)) == 0 && 49 current != cfg) { 50 if (current < cfg) 51 current++; 52 else 53 current--; 54 55 rc = pmic_bus_write(AXP209_DCDC2_VOLTAGE, current); 56 if (rc) 57 break; 58 } 59 60 return rc; 61 } 62 63 int axp_set_dcdc3(unsigned int mvolt) 64 { 65 u8 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25); 66 int rc; 67 68 if (mvolt == 0) 69 return pmic_bus_clrbits(AXP209_OUTPUT_CTRL, 70 AXP209_OUTPUT_CTRL_DCDC3); 71 72 rc = pmic_bus_write(AXP209_DCDC3_VOLTAGE, cfg); 73 if (rc) 74 return rc; 75 76 return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_DCDC3); 77 } 78 79 int axp_set_aldo2(unsigned int mvolt) 80 { 81 int rc; 82 u8 cfg, reg; 83 84 if (mvolt == 0) 85 return pmic_bus_clrbits(AXP209_OUTPUT_CTRL, 86 AXP209_OUTPUT_CTRL_LDO2); 87 88 cfg = axp209_mvolt_to_cfg(mvolt, 1800, 3300, 100); 89 90 rc = pmic_bus_read(AXP209_LDO24_VOLTAGE, ®); 91 if (rc) 92 return rc; 93 94 reg |= AXP209_LDO24_LDO2_SET(reg, cfg); 95 rc = pmic_bus_write(AXP209_LDO24_VOLTAGE, reg); 96 if (rc) 97 return rc; 98 99 return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO2); 100 } 101 102 int axp_set_aldo3(unsigned int mvolt) 103 { 104 u8 cfg; 105 int rc; 106 107 if (mvolt == 0) 108 return pmic_bus_clrbits(AXP209_OUTPUT_CTRL, 109 AXP209_OUTPUT_CTRL_LDO3); 110 111 /* 112 * Some boards have trouble reaching the target voltage without causing 113 * great inrush currents. To prevent this, boards can enable a certain 114 * slope to ramp up voltage. Note, this only works when changing an 115 * already active power rail. When toggling power on, the AXP ramps up 116 * steeply at 0.0167 V/uS. 117 */ 118 rc = pmic_bus_read(AXP209_VRC_DCDC2_LDO3, &cfg); 119 cfg = AXP209_VRC_LDO3_SLOPE_SET(cfg, AXP209_VRC_SLOPE); 120 rc |= pmic_bus_write(AXP209_VRC_DCDC2_LDO3, cfg); 121 122 if (rc) 123 return rc; 124 125 #ifdef CONFIG_AXP_ALDO3_INRUSH_QUIRK 126 /* 127 * On some boards, LDO3 has a too big capacitor installed. When 128 * turning on LDO3, this causes the AXP209 to shutdown on 129 * voltages over 1.9 volt. As a workaround, we enable LDO3 130 * first with the lowest possible voltage. If this still causes 131 * high inrush currents, the voltage slope should be increased. 132 */ 133 rc = pmic_bus_read(AXP209_OUTPUT_CTRL, &cfg); 134 if (rc) 135 return rc; 136 137 if (!(cfg & AXP209_OUTPUT_CTRL_LDO3)) { 138 rc = pmic_bus_write(AXP209_LDO3_VOLTAGE, 0x0); /* 0.7 Volt */ 139 mdelay(1); 140 rc |= pmic_bus_setbits(AXP209_OUTPUT_CTRL, 141 AXP209_OUTPUT_CTRL_LDO3); 142 143 if (rc) 144 return rc; 145 } 146 #endif 147 148 if (mvolt == -1) { 149 cfg = AXP209_LDO3_VOLTAGE_FROM_LDO3IN; 150 } else { 151 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25); 152 cfg = AXP209_LDO3_VOLTAGE_SET(cfg); 153 } 154 155 rc = pmic_bus_write(AXP209_LDO3_VOLTAGE, cfg); 156 if (rc) 157 return rc; 158 159 return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO3); 160 } 161 162 int axp_set_aldo4(unsigned int mvolt) 163 { 164 int rc; 165 static const unsigned int vindex[] = { 166 1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500, 167 2700, 2800, 3000, 3100, 3200, 3300 168 }; 169 u8 cfg, reg; 170 171 if (mvolt == 0) 172 return pmic_bus_clrbits(AXP209_OUTPUT_CTRL, 173 AXP209_OUTPUT_CTRL_LDO4); 174 175 /* Translate mvolt to register cfg value, requested <= selected */ 176 for (cfg = 15; vindex[cfg] > mvolt && cfg > 0; cfg--); 177 178 rc = pmic_bus_read(AXP209_LDO24_VOLTAGE, ®); 179 if (rc) 180 return rc; 181 182 reg |= AXP209_LDO24_LDO4_SET(reg, cfg); 183 rc = pmic_bus_write(AXP209_LDO24_VOLTAGE, reg); 184 if (rc) 185 return rc; 186 187 return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO4); 188 } 189 190 int axp_init(void) 191 { 192 u8 ver; 193 int i, rc; 194 195 rc = pmic_bus_init(); 196 if (rc) 197 return rc; 198 199 rc = pmic_bus_read(AXP209_CHIP_VERSION, &ver); 200 if (rc) 201 return rc; 202 203 if ((ver & AXP209_CHIP_VERSION_MASK) != 0x1) 204 return -EINVAL; 205 206 /* Mask all interrupts */ 207 for (i = AXP209_IRQ_ENABLE1; i <= AXP209_IRQ_ENABLE5; i++) { 208 rc = pmic_bus_write(i, 0); 209 if (rc) 210 return rc; 211 } 212 213 /* 214 * Turn off LDOIO regulators / tri-state GPIO pins, when rebooting 215 * from android these are sometimes on. 216 */ 217 rc = pmic_bus_write(AXP_GPIO0_CTRL, AXP_GPIO_CTRL_INPUT); 218 if (rc) 219 return rc; 220 221 rc = pmic_bus_write(AXP_GPIO1_CTRL, AXP_GPIO_CTRL_INPUT); 222 if (rc) 223 return rc; 224 225 rc = pmic_bus_write(AXP_GPIO2_CTRL, AXP_GPIO_CTRL_INPUT); 226 if (rc) 227 return rc; 228 229 return 0; 230 } 231 232 int do_poweroff(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 233 { 234 pmic_bus_write(AXP209_SHUTDOWN, AXP209_POWEROFF); 235 236 /* infinite loop during shutdown */ 237 while (1) {} 238 239 /* not reached */ 240 return 0; 241 } 242