1dec38b5cSMark Brown /* 2dec38b5cSMark Brown * isl9305 - Intersil ISL9305 DCDC regulator 3dec38b5cSMark Brown * 4dec38b5cSMark Brown * Copyright 2014 Linaro Ltd 5dec38b5cSMark Brown * 6dec38b5cSMark Brown * Author: Mark Brown <broonie@kernel.org> 7dec38b5cSMark Brown * 8dec38b5cSMark Brown * This program is free software; you can redistribute it and/or modify it 9dec38b5cSMark Brown * under the terms of the GNU General Public License as published by the 10dec38b5cSMark Brown * Free Software Foundation; either version 2 of the License, or (at your 11dec38b5cSMark Brown * option) any later version. 12dec38b5cSMark Brown */ 13dec38b5cSMark Brown 14dec38b5cSMark Brown #include <linux/module.h> 15dec38b5cSMark Brown #include <linux/err.h> 16dec38b5cSMark Brown #include <linux/i2c.h> 17dec38b5cSMark Brown #include <linux/of.h> 18dec38b5cSMark Brown #include <linux/platform_data/isl9305.h> 19dec38b5cSMark Brown #include <linux/regmap.h> 20dec38b5cSMark Brown #include <linux/regulator/driver.h> 21dec38b5cSMark Brown #include <linux/regulator/of_regulator.h> 22dec38b5cSMark Brown #include <linux/slab.h> 23dec38b5cSMark Brown 24dec38b5cSMark Brown /* 25dec38b5cSMark Brown * Registers 26dec38b5cSMark Brown */ 27dec38b5cSMark Brown #define ISL9305_DCD1OUT 0x0 28dec38b5cSMark Brown #define ISL9305_DCD2OUT 0x1 29dec38b5cSMark Brown #define ISL9305_LDO1OUT 0x2 30dec38b5cSMark Brown #define ISL9305_LDO2OUT 0x3 31dec38b5cSMark Brown #define ISL9305_DCD_PARAMETER 0x4 32dec38b5cSMark Brown #define ISL9305_SYSTEM_PARAMETER 0x5 33dec38b5cSMark Brown #define ISL9305_DCD_SRCTL 0x6 34dec38b5cSMark Brown 35dec38b5cSMark Brown #define ISL9305_MAX_REG ISL9305_DCD_SRCTL 36dec38b5cSMark Brown 37dec38b5cSMark Brown /* 38dec38b5cSMark Brown * DCD_PARAMETER 39dec38b5cSMark Brown */ 40dec38b5cSMark Brown #define ISL9305_DCD_PHASE 0x40 41dec38b5cSMark Brown #define ISL9305_DCD2_ULTRA 0x20 42dec38b5cSMark Brown #define ISL9305_DCD1_ULTRA 0x10 43dec38b5cSMark Brown #define ISL9305_DCD2_BLD 0x08 44dec38b5cSMark Brown #define ISL9305_DCD1_BLD 0x04 45dec38b5cSMark Brown #define ISL9305_DCD2_MODE 0x02 46dec38b5cSMark Brown #define ISL9305_DCD1_MODE 0x01 47dec38b5cSMark Brown 48dec38b5cSMark Brown /* 49dec38b5cSMark Brown * SYSTEM_PARAMETER 50dec38b5cSMark Brown */ 51dec38b5cSMark Brown #define ISL9305_I2C_EN 0x40 52dec38b5cSMark Brown #define ISL9305_DCDPOR_MASK 0x30 53dec38b5cSMark Brown #define ISL9305_LDO2_EN 0x08 54dec38b5cSMark Brown #define ISL9305_LDO1_EN 0x04 55dec38b5cSMark Brown #define ISL9305_DCD2_EN 0x02 56dec38b5cSMark Brown #define ISL9305_DCD1_EN 0x01 57dec38b5cSMark Brown 58dec38b5cSMark Brown /* 59dec38b5cSMark Brown * DCD_SRCTL 60dec38b5cSMark Brown */ 61dec38b5cSMark Brown #define ISL9305_DCD2SR_MASK 0xc0 62dec38b5cSMark Brown #define ISL9305_DCD1SR_MASK 0x07 63dec38b5cSMark Brown 64dec38b5cSMark Brown static const struct regulator_ops isl9305_ops = { 65dec38b5cSMark Brown .enable = regulator_enable_regmap, 66dec38b5cSMark Brown .disable = regulator_disable_regmap, 67dec38b5cSMark Brown .is_enabled = regulator_is_enabled_regmap, 68dec38b5cSMark Brown .list_voltage = regulator_list_voltage_linear, 69dec38b5cSMark Brown .get_voltage_sel = regulator_get_voltage_sel_regmap, 70dec38b5cSMark Brown .set_voltage_sel = regulator_set_voltage_sel_regmap, 71dec38b5cSMark Brown }; 72dec38b5cSMark Brown 73dec38b5cSMark Brown static const struct regulator_desc isl9305_regulators[] = { 74dec38b5cSMark Brown [ISL9305_DCD1] = { 75dec38b5cSMark Brown .name = "DCD1", 7693a127b1SMark Brown .of_match = of_match_ptr("dcd1"), 7793a127b1SMark Brown .regulators_node = of_match_ptr("regulators"), 78dec38b5cSMark Brown .n_voltages = 0x70, 79dec38b5cSMark Brown .min_uV = 825000, 80dec38b5cSMark Brown .uV_step = 25000, 81dec38b5cSMark Brown .vsel_reg = ISL9305_DCD1OUT, 82dec38b5cSMark Brown .vsel_mask = 0x7f, 83dec38b5cSMark Brown .enable_reg = ISL9305_SYSTEM_PARAMETER, 84dec38b5cSMark Brown .enable_mask = ISL9305_DCD1_EN, 85dec38b5cSMark Brown .supply_name = "VINDCD1", 86dec38b5cSMark Brown .ops = &isl9305_ops, 87dec38b5cSMark Brown }, 88dec38b5cSMark Brown [ISL9305_DCD2] = { 89dec38b5cSMark Brown .name = "DCD2", 9093a127b1SMark Brown .of_match = of_match_ptr("dcd2"), 9193a127b1SMark Brown .regulators_node = of_match_ptr("regulators"), 92dec38b5cSMark Brown .n_voltages = 0x70, 93dec38b5cSMark Brown .min_uV = 825000, 94dec38b5cSMark Brown .uV_step = 25000, 95dec38b5cSMark Brown .vsel_reg = ISL9305_DCD2OUT, 96dec38b5cSMark Brown .vsel_mask = 0x7f, 97dec38b5cSMark Brown .enable_reg = ISL9305_SYSTEM_PARAMETER, 98dec38b5cSMark Brown .enable_mask = ISL9305_DCD2_EN, 99dec38b5cSMark Brown .supply_name = "VINDCD2", 100dec38b5cSMark Brown .ops = &isl9305_ops, 101dec38b5cSMark Brown }, 102dec38b5cSMark Brown [ISL9305_LDO1] = { 103dec38b5cSMark Brown .name = "LDO1", 10493a127b1SMark Brown .of_match = of_match_ptr("ldo1"), 10593a127b1SMark Brown .regulators_node = of_match_ptr("regulators"), 106dec38b5cSMark Brown .n_voltages = 0x37, 107dec38b5cSMark Brown .min_uV = 900000, 108dec38b5cSMark Brown .uV_step = 50000, 109dec38b5cSMark Brown .vsel_reg = ISL9305_LDO1OUT, 110dec38b5cSMark Brown .vsel_mask = 0x3f, 111dec38b5cSMark Brown .enable_reg = ISL9305_SYSTEM_PARAMETER, 112dec38b5cSMark Brown .enable_mask = ISL9305_LDO1_EN, 113dec38b5cSMark Brown .supply_name = "VINLDO1", 114dec38b5cSMark Brown .ops = &isl9305_ops, 115dec38b5cSMark Brown }, 116dec38b5cSMark Brown [ISL9305_LDO2] = { 117dec38b5cSMark Brown .name = "LDO2", 11893a127b1SMark Brown .of_match = of_match_ptr("ldo2"), 11993a127b1SMark Brown .regulators_node = of_match_ptr("regulators"), 120dec38b5cSMark Brown .n_voltages = 0x37, 121dec38b5cSMark Brown .min_uV = 900000, 122dec38b5cSMark Brown .uV_step = 50000, 123dec38b5cSMark Brown .vsel_reg = ISL9305_LDO2OUT, 124dec38b5cSMark Brown .vsel_mask = 0x3f, 125dec38b5cSMark Brown .enable_reg = ISL9305_SYSTEM_PARAMETER, 126dec38b5cSMark Brown .enable_mask = ISL9305_LDO2_EN, 127dec38b5cSMark Brown .supply_name = "VINLDO2", 128dec38b5cSMark Brown .ops = &isl9305_ops, 129dec38b5cSMark Brown }, 130dec38b5cSMark Brown }; 131dec38b5cSMark Brown 132dec38b5cSMark Brown static const struct regmap_config isl9305_regmap = { 133dec38b5cSMark Brown .reg_bits = 8, 134dec38b5cSMark Brown .val_bits = 8, 135dec38b5cSMark Brown 136dec38b5cSMark Brown .max_register = ISL9305_MAX_REG, 137dec38b5cSMark Brown .cache_type = REGCACHE_RBTREE, 138dec38b5cSMark Brown }; 139dec38b5cSMark Brown 140dec38b5cSMark Brown static int isl9305_i2c_probe(struct i2c_client *i2c, 141dec38b5cSMark Brown const struct i2c_device_id *id) 142dec38b5cSMark Brown { 143dec38b5cSMark Brown struct regulator_config config = { }; 144dec38b5cSMark Brown struct isl9305_pdata *pdata = i2c->dev.platform_data; 145dec38b5cSMark Brown struct regulator_dev *rdev; 146dec38b5cSMark Brown struct regmap *regmap; 147dec38b5cSMark Brown int i, ret; 148dec38b5cSMark Brown 149dec38b5cSMark Brown regmap = devm_regmap_init_i2c(i2c, &isl9305_regmap); 150dec38b5cSMark Brown if (IS_ERR(regmap)) { 151dec38b5cSMark Brown ret = PTR_ERR(regmap); 152dec38b5cSMark Brown dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret); 153dec38b5cSMark Brown return ret; 154dec38b5cSMark Brown } 155dec38b5cSMark Brown 156dec38b5cSMark Brown config.dev = &i2c->dev; 157dec38b5cSMark Brown 158dec38b5cSMark Brown for (i = 0; i < ARRAY_SIZE(isl9305_regulators); i++) { 15993a127b1SMark Brown if (pdata) 160dec38b5cSMark Brown config.init_data = pdata->init_data[i]; 16193a127b1SMark Brown else 16293a127b1SMark Brown config.init_data = NULL; 163dec38b5cSMark Brown 164dec38b5cSMark Brown rdev = devm_regulator_register(&i2c->dev, 165dec38b5cSMark Brown &isl9305_regulators[i], 166dec38b5cSMark Brown &config); 167dec38b5cSMark Brown if (IS_ERR(rdev)) { 168dec38b5cSMark Brown ret = PTR_ERR(rdev); 169dec38b5cSMark Brown dev_err(&i2c->dev, "Failed to register %s: %d\n", 170dec38b5cSMark Brown isl9305_regulators[i].name, ret); 171dec38b5cSMark Brown return ret; 172dec38b5cSMark Brown } 173dec38b5cSMark Brown } 174dec38b5cSMark Brown 175dec38b5cSMark Brown return 0; 176dec38b5cSMark Brown } 177dec38b5cSMark Brown 178dec38b5cSMark Brown #ifdef CONFIG_OF 179dec38b5cSMark Brown static const struct of_device_id isl9305_dt_ids[] = { 1806fd75357SArnaud Ebalard { .compatible = "isl,isl9305" }, /* for backward compat., don't use */ 1816fd75357SArnaud Ebalard { .compatible = "isil,isl9305" }, 1826fd75357SArnaud Ebalard { .compatible = "isl,isl9305h" }, /* for backward compat., don't use */ 1836fd75357SArnaud Ebalard { .compatible = "isil,isl9305h" }, 184dec38b5cSMark Brown {}, 185dec38b5cSMark Brown }; 186dec38b5cSMark Brown #endif 187dec38b5cSMark Brown 188dec38b5cSMark Brown static const struct i2c_device_id isl9305_i2c_id[] = { 189dec38b5cSMark Brown { "isl9305", }, 190dec38b5cSMark Brown { "isl9305h", }, 191dec38b5cSMark Brown { } 192dec38b5cSMark Brown }; 193dec38b5cSMark Brown MODULE_DEVICE_TABLE(i2c, isl9305_i2c_id); 194dec38b5cSMark Brown 195dec38b5cSMark Brown static struct i2c_driver isl9305_regulator_driver = { 196dec38b5cSMark Brown .driver = { 197dec38b5cSMark Brown .name = "isl9305", 198dec38b5cSMark Brown .owner = THIS_MODULE, 199dec38b5cSMark Brown .of_match_table = of_match_ptr(isl9305_dt_ids), 200dec38b5cSMark Brown }, 201dec38b5cSMark Brown .probe = isl9305_i2c_probe, 202dec38b5cSMark Brown .id_table = isl9305_i2c_id, 203dec38b5cSMark Brown }; 204dec38b5cSMark Brown 205dec38b5cSMark Brown module_i2c_driver(isl9305_regulator_driver); 206dec38b5cSMark Brown 207dec38b5cSMark Brown MODULE_AUTHOR("Mark Brown"); 208dec38b5cSMark Brown MODULE_DESCRIPTION("Intersil ISL9305 DCDC regulator"); 209dec38b5cSMark Brown MODULE_LICENSE("GPL"); 210