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_REG", .driver = "rk8xx_buck"}, 30 { .prefix = "LDO_REG", .driver = "rk8xx_ldo"}, 31 { .prefix = "SWITCH_REG", .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 fuel_gauge_info[] = { 41 { .prefix = "battery", .driver = "rk818_fg"}, 42 { .prefix = "battery", .driver = "rk817_fg"}, 43 { .prefix = "battery", .driver = "rk816_fg"}, 44 { }, 45 }; 46 47 static int rk8xx_reg_count(struct udevice *dev) 48 { 49 return RK808_NUM_OF_REGS; 50 } 51 52 static int rk8xx_write(struct udevice *dev, uint reg, const uint8_t *buff, 53 int len) 54 { 55 int ret; 56 57 ret = dm_i2c_write(dev, reg, buff, len); 58 if (ret) { 59 debug("write error to device: %p register: %#x!", dev, reg); 60 return ret; 61 } 62 63 return 0; 64 } 65 66 static int rk8xx_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 67 { 68 int ret; 69 70 ret = dm_i2c_read(dev, reg, buff, len); 71 if (ret) { 72 debug("read error from device: %p register: %#x!", dev, reg); 73 return ret; 74 } 75 76 return 0; 77 } 78 79 static int rk8xx_shutdown(struct udevice *dev) 80 { 81 struct rk8xx_priv *priv = dev_get_priv(dev); 82 u8 val, dev_off, devctrl_reg; 83 int ret = 0; 84 85 switch (priv->variant) { 86 case RK808_ID: 87 devctrl_reg = REG_DEVCTRL; 88 dev_off = BIT(3); 89 break; 90 case RK805_ID: 91 case RK816_ID: 92 case RK818_ID: 93 devctrl_reg = REG_DEVCTRL; 94 dev_off = BIT(0); 95 break; 96 case RK809_ID: 97 case RK817_ID: 98 devctrl_reg = RK817_REG_SYS_CFG3; 99 dev_off = BIT(0); 100 break; 101 default: 102 printf("Unknown PMIC: RK%x\n", priv->variant); 103 return -EINVAL; 104 } 105 106 ret = dm_i2c_read(dev, devctrl_reg, &val, 1); 107 if (ret) { 108 printf("read error from device: %p register: %#x!", 109 dev, devctrl_reg); 110 return ret; 111 } 112 113 val |= dev_off; 114 ret = dm_i2c_write(dev, devctrl_reg, &val, 1); 115 if (ret) { 116 printf("write error to device: %p register: %#x!", 117 dev, devctrl_reg); 118 return ret; 119 } 120 121 return 0; 122 } 123 124 #if CONFIG_IS_ENABLED(PMIC_CHILDREN) 125 static int rk8xx_bind(struct udevice *dev) 126 { 127 ofnode regulators_node; 128 int children; 129 130 regulators_node = dev_read_subnode(dev, "regulators"); 131 if (!ofnode_valid(regulators_node)) { 132 debug("%s: %s regulators subnode not found!", __func__, 133 dev->name); 134 return -ENXIO; 135 } 136 137 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); 138 139 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 140 if (!children) 141 debug("%s: %s - no child found\n", __func__, dev->name); 142 143 children = pmic_bind_children(dev, dev->node, power_key_info); 144 if (!children) 145 debug("%s: %s - no child found\n", __func__, dev->name); 146 147 children = pmic_bind_children(dev, dev->node, fuel_gauge_info); 148 if (!children) 149 debug("%s: %s - no child found\n", __func__, dev->name); 150 151 /* Always return success for this device */ 152 return 0; 153 } 154 #endif 155 156 static int rk8xx_probe(struct udevice *dev) 157 { 158 struct rk8xx_priv *priv = dev_get_priv(dev); 159 struct reg_data *init_data = NULL; 160 int init_data_num = 0; 161 int ret = 0, i; 162 uint8_t msb, lsb, id_msb, id_lsb; 163 164 /* read Chip variant */ 165 if (device_is_compatible(dev, "rockchip,rk817") || 166 device_is_compatible(dev, "rockchip,rk809")) { 167 id_msb = RK817_ID_MSB; 168 id_lsb = RK817_ID_LSB; 169 } else { 170 id_msb = ID_MSB; 171 id_lsb = ID_LSB; 172 } 173 174 rk8xx_read(dev, id_msb, &msb, 1); 175 rk8xx_read(dev, id_lsb, &lsb, 1); 176 177 priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK; 178 switch (priv->variant) { 179 case RK805_ID: 180 case RK808_ID: 181 case RK816_ID: 182 case RK818_ID: 183 break; 184 case RK809_ID: 185 case RK817_ID: 186 #ifdef CONFIG_DM_CHARGE_DISPLAY 187 init_data = rk817_init_reg; 188 init_data_num = ARRAY_SIZE(rk817_init_reg); 189 #endif 190 break; 191 default: 192 printf("Unknown PMIC: RK%x!!\n", priv->variant); 193 return -EINVAL; 194 } 195 196 for (i = 0; i < init_data_num; i++) { 197 ret = pmic_clrsetbits(dev, 198 init_data[i].reg, 199 init_data[i].mask, 200 init_data[i].val); 201 if (ret < 0) { 202 printf("%s: i2c set reg 0x%x failed, ret=%d\n", 203 __func__, init_data[i].reg, ret); 204 } 205 206 debug("%s: reg[0x%x] = 0x%x\n", __func__, init_data[i].reg, 207 pmic_reg_read(dev, init_data[i].reg)); 208 } 209 210 printf("PMIC: RK%x\n", priv->variant); 211 212 return 0; 213 } 214 215 static struct dm_pmic_ops rk8xx_ops = { 216 .reg_count = rk8xx_reg_count, 217 .read = rk8xx_read, 218 .write = rk8xx_write, 219 .shutdown = rk8xx_shutdown, 220 }; 221 222 static const struct udevice_id rk8xx_ids[] = { 223 { .compatible = "rockchip,rk805" }, 224 { .compatible = "rockchip,rk808" }, 225 { .compatible = "rockchip,rk809" }, 226 { .compatible = "rockchip,rk816" }, 227 { .compatible = "rockchip,rk817" }, 228 { .compatible = "rockchip,rk818" }, 229 { } 230 }; 231 232 U_BOOT_DRIVER(pmic_rk8xx) = { 233 .name = "rk8xx pmic", 234 .id = UCLASS_PMIC, 235 .of_match = rk8xx_ids, 236 #if CONFIG_IS_ENABLED(PMIC_CHILDREN) 237 .bind = rk8xx_bind, 238 #endif 239 .priv_auto_alloc_size = sizeof(struct rk8xx_priv), 240 .probe = rk8xx_probe, 241 .ops = &rk8xx_ops, 242 }; 243