1 /* 2 * Copyright (C) 2015 Google, Inc 3 * Written by Simon Glass <sjg@chromium.org> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <dm.h> 10 #include <errno.h> 11 #include <power/rk8xx_pmic.h> 12 #include <power/pmic.h> 13 14 DECLARE_GLOBAL_DATA_PTR; 15 16 /* 17 * Only when system suspend while U-Boot charge needs this config support 18 */ 19 #ifdef CONFIG_DM_CHARGE_DISPLAY 20 static struct reg_data rk817_init_reg[] = { 21 /* Set pmic_sleep as sleep function */ 22 { RK817_PMIC_SYS_CFG3, 0x08, 0x18 }, 23 /* Set pmic_int active low */ 24 { RK817_GPIO_INT_CFG, 0x00, 0x02 }, 25 }; 26 #endif 27 28 static const struct pmic_child_info pmic_children_info[] = { 29 { .prefix = "DCDC", .driver = "rk8xx_buck"}, 30 { .prefix = "LDO", .driver = "rk8xx_ldo"}, 31 { .prefix = "SWITCH", .driver = "rk8xx_switch"}, 32 { }, 33 }; 34 35 static const struct pmic_child_info power_key_info[] = { 36 { .prefix = "pwrkey", .driver = "rk8xx_pwrkey"}, 37 { }, 38 }; 39 40 static const struct pmic_child_info rtc_info[] = { 41 { .prefix = "rtc", .driver = "rk8xx_rtc"}, 42 { }, 43 }; 44 45 static const struct pmic_child_info fuel_gauge_info[] = { 46 { .prefix = "battery", .driver = "rk818_fg"}, 47 { .prefix = "battery", .driver = "rk817_fg"}, 48 { .prefix = "battery", .driver = "rk816_fg"}, 49 { }, 50 }; 51 52 static const struct pmic_child_info rk817_codec_info[] = { 53 { .prefix = "codec", .driver = "rk817_codec"}, 54 { }, 55 }; 56 57 static int rk8xx_reg_count(struct udevice *dev) 58 { 59 return RK808_NUM_OF_REGS; 60 } 61 62 static int rk8xx_write(struct udevice *dev, uint reg, const uint8_t *buff, 63 int len) 64 { 65 int ret; 66 67 ret = dm_i2c_write(dev, reg, buff, len); 68 if (ret) { 69 printf("%s: write reg 0x%02x failed, ret=%d\n", __func__, reg, ret); 70 return ret; 71 } 72 73 return 0; 74 } 75 76 static int rk8xx_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 77 { 78 int ret; 79 80 ret = dm_i2c_read(dev, reg, buff, len); 81 if (ret) { 82 printf("%s: read reg 0x%02x failed, ret=%d\n", __func__, reg, ret); 83 return ret; 84 } 85 86 return 0; 87 } 88 89 static int rk8xx_shutdown(struct udevice *dev) 90 { 91 struct rk8xx_priv *priv = dev_get_priv(dev); 92 u8 val, dev_off, devctrl_reg; 93 int ret = 0; 94 95 switch (priv->variant) { 96 case RK808_ID: 97 devctrl_reg = REG_DEVCTRL; 98 dev_off = BIT(3); 99 break; 100 case RK805_ID: 101 case RK816_ID: 102 case RK818_ID: 103 devctrl_reg = REG_DEVCTRL; 104 dev_off = BIT(0); 105 break; 106 case RK809_ID: 107 case RK817_ID: 108 devctrl_reg = RK817_REG_SYS_CFG3; 109 dev_off = BIT(0); 110 break; 111 default: 112 printf("Unknown PMIC: RK%x\n", priv->variant); 113 return -EINVAL; 114 } 115 116 ret = dm_i2c_read(dev, devctrl_reg, &val, 1); 117 if (ret) { 118 printf("%s: read reg 0x%02x failed, ret=%d\n", __func__, devctrl_reg, ret); 119 return ret; 120 } 121 122 val |= dev_off; 123 ret = dm_i2c_write(dev, devctrl_reg, &val, 1); 124 if (ret) { 125 printf("%s: write reg 0x%02x failed, ret=%d\n", __func__, devctrl_reg, ret); 126 return ret; 127 } 128 129 return 0; 130 } 131 132 #if CONFIG_IS_ENABLED(PMIC_CHILDREN) 133 static int rk8xx_bind(struct udevice *dev) 134 { 135 ofnode regulators_node; 136 int children; 137 138 regulators_node = dev_read_subnode(dev, "regulators"); 139 if (!ofnode_valid(regulators_node)) { 140 debug("%s: %s regulators subnode not found!\n", __func__, 141 dev->name); 142 return -ENXIO; 143 } 144 145 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); 146 147 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 148 if (!children) 149 debug("%s: %s - no child found\n", __func__, dev->name); 150 151 children = pmic_bind_children(dev, dev->node, power_key_info); 152 if (!children) 153 debug("%s: %s - no child found\n", __func__, dev->name); 154 155 children = pmic_bind_children(dev, dev->node, rtc_info); 156 if (!children) 157 debug("%s: %s - no child found\n", __func__, dev->name); 158 159 children = pmic_bind_children(dev, dev->node, fuel_gauge_info); 160 if (!children) 161 debug("%s: %s - no child found\n", __func__, dev->name); 162 163 children = pmic_bind_children(dev, dev->node, rk817_codec_info); 164 if (!children) 165 debug("%s: %s - no child found\n", __func__, dev->name); 166 167 /* Always return success for this device */ 168 return 0; 169 } 170 #endif 171 172 static int rk8xx_probe(struct udevice *dev) 173 { 174 struct rk8xx_priv *priv = dev_get_priv(dev); 175 struct reg_data *init_data = NULL; 176 int init_data_num = 0; 177 int ret = 0, i, show_variant; 178 uint8_t msb, lsb, id_msb, id_lsb; 179 uint8_t on_source = 0, off_source = 0; 180 uint8_t power_en0, power_en1, power_en2, power_en3; 181 uint8_t value; 182 183 /* read Chip variant */ 184 if (device_is_compatible(dev, "rockchip,rk817") || 185 device_is_compatible(dev, "rockchip,rk809")) { 186 id_msb = RK817_ID_MSB; 187 id_lsb = RK817_ID_LSB; 188 } else { 189 id_msb = ID_MSB; 190 id_lsb = ID_LSB; 191 } 192 193 ret = rk8xx_read(dev, id_msb, &msb, 1); 194 if (ret) 195 return ret; 196 ret = rk8xx_read(dev, id_lsb, &lsb, 1); 197 if (ret) 198 return ret; 199 200 priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK; 201 show_variant = priv->variant; 202 switch (priv->variant) { 203 case RK808_ID: 204 show_variant = 0x808; /* RK808 hardware ID is 0 */ 205 break; 206 case RK805_ID: 207 case RK816_ID: 208 case RK818_ID: 209 on_source = RK8XX_ON_SOURCE; 210 off_source = RK8XX_OFF_SOURCE; 211 break; 212 case RK809_ID: 213 case RK817_ID: 214 on_source = RK817_ON_SOURCE; 215 off_source = RK817_OFF_SOURCE; 216 #ifdef CONFIG_DM_CHARGE_DISPLAY 217 init_data = rk817_init_reg; 218 init_data_num = ARRAY_SIZE(rk817_init_reg); 219 #endif 220 power_en0 = pmic_reg_read(dev, RK817_POWER_EN0); 221 power_en1 = pmic_reg_read(dev, RK817_POWER_EN1); 222 power_en2 = pmic_reg_read(dev, RK817_POWER_EN2); 223 power_en3 = pmic_reg_read(dev, RK817_POWER_EN3); 224 225 value = (power_en0 & 0x0f) | ((power_en1 & 0x0f) << 4); 226 pmic_reg_write(dev, RK817_POWER_EN_SAVE0, value); 227 value = (power_en2 & 0x0f) | ((power_en3 & 0x0f) << 4); 228 pmic_reg_write(dev, RK817_POWER_EN_SAVE1, value); 229 break; 230 default: 231 printf("Unknown PMIC: RK%x!!\n", priv->variant); 232 return -EINVAL; 233 } 234 235 for (i = 0; i < init_data_num; i++) { 236 ret = pmic_clrsetbits(dev, 237 init_data[i].reg, 238 init_data[i].mask, 239 init_data[i].val); 240 if (ret < 0) { 241 printf("%s: i2c set reg 0x%x failed, ret=%d\n", 242 __func__, init_data[i].reg, ret); 243 } 244 245 debug("%s: reg[0x%x] = 0x%x\n", __func__, init_data[i].reg, 246 pmic_reg_read(dev, init_data[i].reg)); 247 } 248 249 printf("PMIC: RK%x ", show_variant); 250 251 if (on_source && off_source) { 252 on_source = pmic_reg_read(dev, on_source); 253 off_source = pmic_reg_read(dev, off_source); 254 printf("(on=0x%02x, off=0x%02x)", 255 pmic_reg_read(dev, on_source), 256 pmic_reg_read(dev, off_source)); 257 } 258 printf("\n"); 259 260 return 0; 261 } 262 263 static struct dm_pmic_ops rk8xx_ops = { 264 .reg_count = rk8xx_reg_count, 265 .read = rk8xx_read, 266 .write = rk8xx_write, 267 .shutdown = rk8xx_shutdown, 268 }; 269 270 static const struct udevice_id rk8xx_ids[] = { 271 { .compatible = "rockchip,rk805" }, 272 { .compatible = "rockchip,rk808" }, 273 { .compatible = "rockchip,rk809" }, 274 { .compatible = "rockchip,rk816" }, 275 { .compatible = "rockchip,rk817" }, 276 { .compatible = "rockchip,rk818" }, 277 { } 278 }; 279 280 U_BOOT_DRIVER(pmic_rk8xx) = { 281 .name = "rk8xx pmic", 282 .id = UCLASS_PMIC, 283 .of_match = rk8xx_ids, 284 #if CONFIG_IS_ENABLED(PMIC_CHILDREN) 285 .bind = rk8xx_bind, 286 #endif 287 .priv_auto_alloc_size = sizeof(struct rk8xx_priv), 288 .probe = rk8xx_probe, 289 .ops = &rk8xx_ops, 290 }; 291