1 /* 2 * (C) Copyright 2017 3 * Texas Instruments Incorporated, <www.ti.com> 4 * 5 * Keerthy <j-keerthy@ti.com> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <fdtdec.h> 12 #include <errno.h> 13 #include <dm.h> 14 #include <i2c.h> 15 #include <power/pmic.h> 16 #include <power/regulator.h> 17 #include <power/lp87565.h> 18 19 DECLARE_GLOBAL_DATA_PTR; 20 21 static const char lp87565_buck_ctrl1[LP87565_BUCK_NUM] = {0x2, 0x4, 0x6, 0x8, 0x2, 0x6}; 22 static const char lp87565_buck_vout[LP87565_BUCK_NUM] = {0xA, 0xC, 0xE, 0x10, 0xA, 0xE }; 23 24 static int lp87565_buck_enable(struct udevice *dev, int op, bool *enable) 25 { 26 int ret; 27 unsigned int adr; 28 struct dm_regulator_uclass_platdata *uc_pdata; 29 30 uc_pdata = dev_get_uclass_platdata(dev); 31 adr = uc_pdata->ctrl_reg; 32 33 ret = pmic_reg_read(dev->parent, adr); 34 if (ret < 0) 35 return ret; 36 37 if (op == PMIC_OP_GET) { 38 ret &= LP87565_BUCK_MODE_MASK; 39 40 if (ret) 41 *enable = true; 42 else 43 *enable = false; 44 45 return 0; 46 } else if (op == PMIC_OP_SET) { 47 if (*enable) 48 ret |= LP87565_BUCK_MODE_MASK; 49 else 50 ret &= ~LP87565_BUCK_MODE_MASK; 51 ret = pmic_reg_write(dev->parent, adr, ret); 52 if (ret) 53 return ret; 54 } 55 56 return 0; 57 } 58 59 static int lp87565_buck_volt2val(int uV) 60 { 61 if (uV > LP87565_BUCK_VOLT_MAX) 62 return -EINVAL; 63 else if (uV > 1400000) 64 return (uV - 1420000) / 20000 + 0x9E; 65 else if (uV > 730000) 66 return (uV - 735000) / 5000 + 0x18; 67 else if (uV >= 500000) 68 return (uV - 500000) / 10000; 69 else 70 return -EINVAL; 71 } 72 73 static int lp87565_buck_val2volt(int val) 74 { 75 if (val > LP87565_BUCK_VOLT_MAX_HEX) 76 return -EINVAL; 77 else if (val > 0x9D) 78 return 1400000 + (val - 0x9D) * 20000; 79 else if (val > 0x17) 80 return 730000 + (val - 0x17) * 5000; 81 else if (val >= 0x0) 82 return 500000 + val * 10000; 83 else 84 return -EINVAL; 85 } 86 87 static int lp87565_buck_val(struct udevice *dev, int op, int *uV) 88 { 89 unsigned int hex, adr; 90 int ret; 91 struct dm_regulator_uclass_platdata *uc_pdata; 92 93 uc_pdata = dev_get_uclass_platdata(dev); 94 95 if (op == PMIC_OP_GET) 96 *uV = 0; 97 98 adr = uc_pdata->volt_reg; 99 100 ret = pmic_reg_read(dev->parent, adr); 101 if (ret < 0) 102 return ret; 103 104 if (op == PMIC_OP_GET) { 105 ret &= LP87565_BUCK_VOLT_MASK; 106 ret = lp87565_buck_val2volt(ret); 107 if (ret < 0) 108 return ret; 109 *uV = ret; 110 111 return 0; 112 } 113 114 hex = lp87565_buck_volt2val(*uV); 115 if (hex < 0) 116 return hex; 117 118 ret &= 0x0; 119 ret = hex; 120 121 ret = pmic_reg_write(dev->parent, adr, ret); 122 123 return ret; 124 } 125 126 static int lp87565_buck_probe(struct udevice *dev) 127 { 128 struct dm_regulator_uclass_platdata *uc_pdata; 129 int idx; 130 131 uc_pdata = dev_get_uclass_platdata(dev); 132 uc_pdata->type = REGULATOR_TYPE_BUCK; 133 134 idx = dev->driver_data; 135 if (idx == 0 || idx == 1 || idx == 2 || idx == 3) { 136 debug("Single phase regulator\n"); 137 } else if (idx == 23) { 138 idx = 5; 139 } else if (idx == 10) { 140 idx = 4; 141 } else { 142 printf("Wrong ID for regulator\n"); 143 return -EINVAL; 144 } 145 146 uc_pdata->ctrl_reg = lp87565_buck_ctrl1[idx]; 147 uc_pdata->volt_reg = lp87565_buck_vout[idx]; 148 149 return 0; 150 } 151 152 static int buck_get_value(struct udevice *dev) 153 { 154 int uV; 155 int ret; 156 157 ret = lp87565_buck_val(dev, PMIC_OP_GET, &uV); 158 if (ret) 159 return ret; 160 161 return uV; 162 } 163 164 static int buck_set_value(struct udevice *dev, int uV) 165 { 166 return lp87565_buck_val(dev, PMIC_OP_SET, &uV); 167 } 168 169 static int buck_get_enable(struct udevice *dev) 170 { 171 bool enable = false; 172 int ret; 173 174 175 ret = lp87565_buck_enable(dev, PMIC_OP_GET, &enable); 176 if (ret) 177 return ret; 178 179 return enable; 180 } 181 182 static int buck_set_enable(struct udevice *dev, bool enable) 183 { 184 return lp87565_buck_enable(dev, PMIC_OP_SET, &enable); 185 } 186 187 static const struct dm_regulator_ops lp87565_buck_ops = { 188 .get_value = buck_get_value, 189 .set_value = buck_set_value, 190 .get_enable = buck_get_enable, 191 .set_enable = buck_set_enable, 192 }; 193 194 U_BOOT_DRIVER(lp87565_buck) = { 195 .name = LP87565_BUCK_DRIVER, 196 .id = UCLASS_REGULATOR, 197 .ops = &lp87565_buck_ops, 198 .probe = lp87565_buck_probe, 199 }; 200