1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * isl9305 - Intersil ISL9305 DCDC regulator 4 * 5 * Copyright 2014 Linaro Ltd 6 * 7 * Author: Mark Brown <broonie@kernel.org> 8 */ 9 10 #include <linux/module.h> 11 #include <linux/err.h> 12 #include <linux/i2c.h> 13 #include <linux/of.h> 14 #include <linux/platform_data/isl9305.h> 15 #include <linux/regmap.h> 16 #include <linux/regulator/driver.h> 17 #include <linux/regulator/of_regulator.h> 18 #include <linux/slab.h> 19 20 /* 21 * Registers 22 */ 23 #define ISL9305_DCD1OUT 0x0 24 #define ISL9305_DCD2OUT 0x1 25 #define ISL9305_LDO1OUT 0x2 26 #define ISL9305_LDO2OUT 0x3 27 #define ISL9305_DCD_PARAMETER 0x4 28 #define ISL9305_SYSTEM_PARAMETER 0x5 29 #define ISL9305_DCD_SRCTL 0x6 30 31 #define ISL9305_MAX_REG ISL9305_DCD_SRCTL 32 33 /* 34 * DCD_PARAMETER 35 */ 36 #define ISL9305_DCD_PHASE 0x40 37 #define ISL9305_DCD2_ULTRA 0x20 38 #define ISL9305_DCD1_ULTRA 0x10 39 #define ISL9305_DCD2_BLD 0x08 40 #define ISL9305_DCD1_BLD 0x04 41 #define ISL9305_DCD2_MODE 0x02 42 #define ISL9305_DCD1_MODE 0x01 43 44 /* 45 * SYSTEM_PARAMETER 46 */ 47 #define ISL9305_I2C_EN 0x40 48 #define ISL9305_DCDPOR_MASK 0x30 49 #define ISL9305_LDO2_EN 0x08 50 #define ISL9305_LDO1_EN 0x04 51 #define ISL9305_DCD2_EN 0x02 52 #define ISL9305_DCD1_EN 0x01 53 54 /* 55 * DCD_SRCTL 56 */ 57 #define ISL9305_DCD2SR_MASK 0xc0 58 #define ISL9305_DCD1SR_MASK 0x07 59 60 static const struct regulator_ops isl9305_ops = { 61 .enable = regulator_enable_regmap, 62 .disable = regulator_disable_regmap, 63 .is_enabled = regulator_is_enabled_regmap, 64 .list_voltage = regulator_list_voltage_linear, 65 .get_voltage_sel = regulator_get_voltage_sel_regmap, 66 .set_voltage_sel = regulator_set_voltage_sel_regmap, 67 }; 68 69 static const struct regulator_desc isl9305_regulators[] = { 70 [ISL9305_DCD1] = { 71 .name = "DCD1", 72 .of_match = of_match_ptr("dcd1"), 73 .regulators_node = of_match_ptr("regulators"), 74 .n_voltages = 0x70, 75 .min_uV = 825000, 76 .uV_step = 25000, 77 .vsel_reg = ISL9305_DCD1OUT, 78 .vsel_mask = 0x7f, 79 .enable_reg = ISL9305_SYSTEM_PARAMETER, 80 .enable_mask = ISL9305_DCD1_EN, 81 .supply_name = "VINDCD1", 82 .ops = &isl9305_ops, 83 .owner = THIS_MODULE, 84 }, 85 [ISL9305_DCD2] = { 86 .name = "DCD2", 87 .of_match = of_match_ptr("dcd2"), 88 .regulators_node = of_match_ptr("regulators"), 89 .n_voltages = 0x70, 90 .min_uV = 825000, 91 .uV_step = 25000, 92 .vsel_reg = ISL9305_DCD2OUT, 93 .vsel_mask = 0x7f, 94 .enable_reg = ISL9305_SYSTEM_PARAMETER, 95 .enable_mask = ISL9305_DCD2_EN, 96 .supply_name = "VINDCD2", 97 .ops = &isl9305_ops, 98 .owner = THIS_MODULE, 99 }, 100 [ISL9305_LDO1] = { 101 .name = "LDO1", 102 .of_match = of_match_ptr("ldo1"), 103 .regulators_node = of_match_ptr("regulators"), 104 .n_voltages = 0x37, 105 .min_uV = 900000, 106 .uV_step = 50000, 107 .vsel_reg = ISL9305_LDO1OUT, 108 .vsel_mask = 0x3f, 109 .enable_reg = ISL9305_SYSTEM_PARAMETER, 110 .enable_mask = ISL9305_LDO1_EN, 111 .supply_name = "VINLDO1", 112 .ops = &isl9305_ops, 113 .owner = THIS_MODULE, 114 }, 115 [ISL9305_LDO2] = { 116 .name = "LDO2", 117 .of_match = of_match_ptr("ldo2"), 118 .regulators_node = of_match_ptr("regulators"), 119 .n_voltages = 0x37, 120 .min_uV = 900000, 121 .uV_step = 50000, 122 .vsel_reg = ISL9305_LDO2OUT, 123 .vsel_mask = 0x3f, 124 .enable_reg = ISL9305_SYSTEM_PARAMETER, 125 .enable_mask = ISL9305_LDO2_EN, 126 .supply_name = "VINLDO2", 127 .ops = &isl9305_ops, 128 .owner = THIS_MODULE, 129 }, 130 }; 131 132 static const struct regmap_config isl9305_regmap = { 133 .reg_bits = 8, 134 .val_bits = 8, 135 136 .max_register = ISL9305_MAX_REG, 137 .cache_type = REGCACHE_RBTREE, 138 }; 139 140 static int isl9305_i2c_probe(struct i2c_client *i2c) 141 { 142 struct regulator_config config = { }; 143 struct isl9305_pdata *pdata = i2c->dev.platform_data; 144 struct regulator_dev *rdev; 145 struct regmap *regmap; 146 int i, ret; 147 148 regmap = devm_regmap_init_i2c(i2c, &isl9305_regmap); 149 if (IS_ERR(regmap)) { 150 ret = PTR_ERR(regmap); 151 dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret); 152 return ret; 153 } 154 155 config.dev = &i2c->dev; 156 157 for (i = 0; i < ARRAY_SIZE(isl9305_regulators); i++) { 158 if (pdata) 159 config.init_data = pdata->init_data[i]; 160 else 161 config.init_data = NULL; 162 163 rdev = devm_regulator_register(&i2c->dev, 164 &isl9305_regulators[i], 165 &config); 166 if (IS_ERR(rdev)) { 167 ret = PTR_ERR(rdev); 168 dev_err(&i2c->dev, "Failed to register %s: %d\n", 169 isl9305_regulators[i].name, ret); 170 return ret; 171 } 172 } 173 174 return 0; 175 } 176 177 #ifdef CONFIG_OF 178 static const struct of_device_id isl9305_dt_ids[] = { 179 { .compatible = "isl,isl9305" }, /* for backward compat., don't use */ 180 { .compatible = "isil,isl9305" }, 181 { .compatible = "isl,isl9305h" }, /* for backward compat., don't use */ 182 { .compatible = "isil,isl9305h" }, 183 {}, 184 }; 185 MODULE_DEVICE_TABLE(of, isl9305_dt_ids); 186 #endif 187 188 static const struct i2c_device_id isl9305_i2c_id[] = { 189 { "isl9305", }, 190 { "isl9305h", }, 191 { } 192 }; 193 MODULE_DEVICE_TABLE(i2c, isl9305_i2c_id); 194 195 static struct i2c_driver isl9305_regulator_driver = { 196 .driver = { 197 .name = "isl9305", 198 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 199 .of_match_table = of_match_ptr(isl9305_dt_ids), 200 }, 201 .probe = isl9305_i2c_probe, 202 .id_table = isl9305_i2c_id, 203 }; 204 205 module_i2c_driver(isl9305_regulator_driver); 206 207 MODULE_AUTHOR("Mark Brown"); 208 MODULE_DESCRIPTION("Intersil ISL9305 DCDC regulator"); 209 MODULE_LICENSE("GPL"); 210