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209 lines
5.2 KiB
C
209 lines
5.2 KiB
C
/*
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* isl9305 - Intersil ISL9305 DCDC regulator
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*
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* Copyright 2014 Linaro Ltd
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*
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* Author: Mark Brown <broonie@kernel.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/of.h>
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#include <linux/platform_data/isl9305.h>
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#include <linux/regmap.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/slab.h>
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/*
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* Registers
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*/
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#define ISL9305_DCD1OUT 0x0
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#define ISL9305_DCD2OUT 0x1
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#define ISL9305_LDO1OUT 0x2
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#define ISL9305_LDO2OUT 0x3
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#define ISL9305_DCD_PARAMETER 0x4
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#define ISL9305_SYSTEM_PARAMETER 0x5
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#define ISL9305_DCD_SRCTL 0x6
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#define ISL9305_MAX_REG ISL9305_DCD_SRCTL
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/*
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* DCD_PARAMETER
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*/
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#define ISL9305_DCD_PHASE 0x40
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#define ISL9305_DCD2_ULTRA 0x20
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#define ISL9305_DCD1_ULTRA 0x10
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#define ISL9305_DCD2_BLD 0x08
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#define ISL9305_DCD1_BLD 0x04
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#define ISL9305_DCD2_MODE 0x02
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#define ISL9305_DCD1_MODE 0x01
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/*
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* SYSTEM_PARAMETER
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*/
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#define ISL9305_I2C_EN 0x40
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#define ISL9305_DCDPOR_MASK 0x30
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#define ISL9305_LDO2_EN 0x08
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#define ISL9305_LDO1_EN 0x04
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#define ISL9305_DCD2_EN 0x02
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#define ISL9305_DCD1_EN 0x01
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/*
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* DCD_SRCTL
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*/
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#define ISL9305_DCD2SR_MASK 0xc0
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#define ISL9305_DCD1SR_MASK 0x07
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static const struct regulator_ops isl9305_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.list_voltage = regulator_list_voltage_linear,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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};
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static const struct regulator_desc isl9305_regulators[] = {
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[ISL9305_DCD1] = {
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.name = "DCD1",
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.of_match = of_match_ptr("dcd1"),
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.regulators_node = of_match_ptr("regulators"),
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.n_voltages = 0x70,
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.min_uV = 825000,
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.uV_step = 25000,
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.vsel_reg = ISL9305_DCD1OUT,
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.vsel_mask = 0x7f,
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.enable_reg = ISL9305_SYSTEM_PARAMETER,
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.enable_mask = ISL9305_DCD1_EN,
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.supply_name = "VINDCD1",
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.ops = &isl9305_ops,
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},
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[ISL9305_DCD2] = {
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.name = "DCD2",
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.of_match = of_match_ptr("dcd2"),
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.regulators_node = of_match_ptr("regulators"),
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.n_voltages = 0x70,
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.min_uV = 825000,
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.uV_step = 25000,
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.vsel_reg = ISL9305_DCD2OUT,
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.vsel_mask = 0x7f,
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.enable_reg = ISL9305_SYSTEM_PARAMETER,
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.enable_mask = ISL9305_DCD2_EN,
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.supply_name = "VINDCD2",
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.ops = &isl9305_ops,
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},
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[ISL9305_LDO1] = {
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.name = "LDO1",
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.of_match = of_match_ptr("ldo1"),
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.regulators_node = of_match_ptr("regulators"),
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.n_voltages = 0x37,
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.min_uV = 900000,
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.uV_step = 50000,
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.vsel_reg = ISL9305_LDO1OUT,
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.vsel_mask = 0x3f,
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.enable_reg = ISL9305_SYSTEM_PARAMETER,
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.enable_mask = ISL9305_LDO1_EN,
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.supply_name = "VINLDO1",
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.ops = &isl9305_ops,
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},
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[ISL9305_LDO2] = {
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.name = "LDO2",
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.of_match = of_match_ptr("ldo2"),
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.regulators_node = of_match_ptr("regulators"),
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.n_voltages = 0x37,
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.min_uV = 900000,
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.uV_step = 50000,
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.vsel_reg = ISL9305_LDO2OUT,
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.vsel_mask = 0x3f,
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.enable_reg = ISL9305_SYSTEM_PARAMETER,
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.enable_mask = ISL9305_LDO2_EN,
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.supply_name = "VINLDO2",
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.ops = &isl9305_ops,
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},
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};
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static const struct regmap_config isl9305_regmap = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = ISL9305_MAX_REG,
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.cache_type = REGCACHE_RBTREE,
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};
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static int isl9305_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct regulator_config config = { };
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struct isl9305_pdata *pdata = i2c->dev.platform_data;
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struct regulator_dev *rdev;
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struct regmap *regmap;
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int i, ret;
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regmap = devm_regmap_init_i2c(i2c, &isl9305_regmap);
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if (IS_ERR(regmap)) {
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ret = PTR_ERR(regmap);
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dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);
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return ret;
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}
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config.dev = &i2c->dev;
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for (i = 0; i < ARRAY_SIZE(isl9305_regulators); i++) {
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if (pdata)
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config.init_data = pdata->init_data[i];
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else
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config.init_data = NULL;
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rdev = devm_regulator_register(&i2c->dev,
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&isl9305_regulators[i],
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&config);
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if (IS_ERR(rdev)) {
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ret = PTR_ERR(rdev);
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dev_err(&i2c->dev, "Failed to register %s: %d\n",
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isl9305_regulators[i].name, ret);
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return ret;
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}
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}
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return 0;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id isl9305_dt_ids[] = {
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{ .compatible = "isl,isl9305" }, /* for backward compat., don't use */
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{ .compatible = "isil,isl9305" },
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{ .compatible = "isl,isl9305h" }, /* for backward compat., don't use */
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{ .compatible = "isil,isl9305h" },
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{},
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};
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MODULE_DEVICE_TABLE(of, isl9305_dt_ids);
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#endif
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static const struct i2c_device_id isl9305_i2c_id[] = {
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{ "isl9305", },
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{ "isl9305h", },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, isl9305_i2c_id);
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static struct i2c_driver isl9305_regulator_driver = {
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.driver = {
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.name = "isl9305",
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.of_match_table = of_match_ptr(isl9305_dt_ids),
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},
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.probe = isl9305_i2c_probe,
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.id_table = isl9305_i2c_id,
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};
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module_i2c_driver(isl9305_regulator_driver);
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MODULE_AUTHOR("Mark Brown");
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MODULE_DESCRIPTION("Intersil ISL9305 DCDC regulator");
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MODULE_LICENSE("GPL");
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