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 static const struct pmic_child_info pmic_children_info[] = { 17 { .prefix = "DCDC_REG", .driver = "rk8xx_buck"}, 18 { .prefix = "LDO_REG", .driver = "rk8xx_ldo"}, 19 { .prefix = "SWITCH_REG", .driver = "rk8xx_switch"}, 20 { }, 21 }; 22 23 static const struct pmic_child_info power_key_info[] = { 24 { .prefix = "pwrkey", .driver = "rk8xx_pwrkey"}, 25 { }, 26 }; 27 28 static const struct pmic_child_info fuel_gauge_info[] = { 29 { .prefix = "battery", .driver = "rk818_fg"}, 30 { .prefix = "battery", .driver = "rk817_fg"}, 31 { .prefix = "battery", .driver = "rk816_fg"}, 32 { }, 33 }; 34 35 static int rk8xx_reg_count(struct udevice *dev) 36 { 37 return RK808_NUM_OF_REGS; 38 } 39 40 static int rk8xx_write(struct udevice *dev, uint reg, const uint8_t *buff, 41 int len) 42 { 43 int ret; 44 45 ret = dm_i2c_write(dev, reg, buff, len); 46 if (ret) { 47 debug("write error to device: %p register: %#x!", dev, reg); 48 return ret; 49 } 50 51 return 0; 52 } 53 54 static int rk8xx_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 55 { 56 int ret; 57 58 ret = dm_i2c_read(dev, reg, buff, len); 59 if (ret) { 60 debug("read error from device: %p register: %#x!", dev, reg); 61 return ret; 62 } 63 64 return 0; 65 } 66 67 static int rk8xx_shutdown(struct udevice *dev) 68 { 69 struct rk8xx_priv *priv = dev_get_priv(dev); 70 u8 val, dev_off, devctrl_reg; 71 int ret = 0; 72 73 switch (priv->variant) { 74 case RK808_ID: 75 devctrl_reg = REG_DEVCTRL; 76 dev_off = BIT(3); 77 break; 78 case RK805_ID: 79 case RK816_ID: 80 case RK818_ID: 81 devctrl_reg = REG_DEVCTRL; 82 dev_off = BIT(0); 83 break; 84 case RK817_ID: 85 devctrl_reg = RK817_REG_SYS_CFG3; 86 dev_off = BIT(0); 87 break; 88 default: 89 printf("Unknown PMIC: RK%x\n", priv->variant); 90 return -EINVAL; 91 } 92 93 ret = dm_i2c_read(dev, devctrl_reg, &val, 1); 94 if (ret) { 95 printf("read error from device: %p register: %#x!", 96 dev, devctrl_reg); 97 return ret; 98 } 99 100 val |= dev_off; 101 ret = dm_i2c_write(dev, devctrl_reg, &val, 1); 102 if (ret) { 103 printf("write error to device: %p register: %#x!", 104 dev, devctrl_reg); 105 return ret; 106 } 107 108 return 0; 109 } 110 111 #if CONFIG_IS_ENABLED(PMIC_CHILDREN) 112 static int rk8xx_bind(struct udevice *dev) 113 { 114 ofnode regulators_node; 115 int children; 116 117 regulators_node = dev_read_subnode(dev, "regulators"); 118 if (!ofnode_valid(regulators_node)) { 119 debug("%s: %s regulators subnode not found!", __func__, 120 dev->name); 121 return -ENXIO; 122 } 123 124 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); 125 126 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 127 if (!children) 128 debug("%s: %s - no child found\n", __func__, dev->name); 129 130 children = pmic_bind_children(dev, dev->node, power_key_info); 131 if (!children) 132 debug("%s: %s - no child found\n", __func__, dev->name); 133 134 children = pmic_bind_children(dev, dev->node, fuel_gauge_info); 135 if (!children) 136 debug("%s: %s - no child found\n", __func__, dev->name); 137 138 /* Always return success for this device */ 139 return 0; 140 } 141 #endif 142 143 static int rk8xx_probe(struct udevice *dev) 144 { 145 struct rk8xx_priv *priv = dev_get_priv(dev); 146 uint8_t msb, lsb, id_msb, id_lsb; 147 148 /* read Chip variant */ 149 if (device_is_compatible(dev, "rockchip,rk817")) { 150 id_msb = RK817_ID_MSB; 151 id_lsb = RK817_ID_LSB; 152 } else { 153 id_msb = ID_MSB; 154 id_lsb = ID_LSB; 155 } 156 157 rk8xx_read(dev, id_msb, &msb, 1); 158 rk8xx_read(dev, id_lsb, &lsb, 1); 159 160 priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK; 161 if ((priv->variant != RK808_ID) && 162 (priv->variant != RK805_ID) && 163 (priv->variant != RK816_ID) && 164 (priv->variant != RK817_ID) && 165 (priv->variant != RK818_ID)) { 166 printf("Unknown PMIC: RK%x!!\n", priv->variant); 167 return -EINVAL; 168 } 169 170 printf("PMIC: RK%x\n", priv->variant); 171 172 return 0; 173 } 174 175 static struct dm_pmic_ops rk8xx_ops = { 176 .reg_count = rk8xx_reg_count, 177 .read = rk8xx_read, 178 .write = rk8xx_write, 179 .shutdown = rk8xx_shutdown, 180 }; 181 182 static const struct udevice_id rk8xx_ids[] = { 183 { .compatible = "rockchip,rk805" }, 184 { .compatible = "rockchip,rk808" }, 185 { .compatible = "rockchip,rk816" }, 186 { .compatible = "rockchip,rk817" }, 187 { .compatible = "rockchip,rk818" }, 188 { } 189 }; 190 191 U_BOOT_DRIVER(pmic_rk8xx) = { 192 .name = "rk8xx pmic", 193 .id = UCLASS_PMIC, 194 .of_match = rk8xx_ids, 195 #if CONFIG_IS_ENABLED(PMIC_CHILDREN) 196 .bind = rk8xx_bind, 197 #endif 198 .priv_auto_alloc_size = sizeof(struct rk8xx_priv), 199 .probe = rk8xx_probe, 200 .ops = &rk8xx_ops, 201 }; 202