345 lines
9.1 KiB
C
345 lines
9.1 KiB
C
/*
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* act8865-regulator.c - Voltage regulation for the active-semi ACT8865
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* http://www.active-semi.com/sheets/ACT8865_Datasheet.pdf
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*
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* Copyright (C) 2013 Atmel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/act8865.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/regmap.h>
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/*
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* ACT8865 Global Register Map.
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*/
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#define ACT8865_SYS_MODE 0x00
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#define ACT8865_SYS_CTRL 0x01
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#define ACT8865_DCDC1_VSET1 0x20
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#define ACT8865_DCDC1_VSET2 0x21
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#define ACT8865_DCDC1_CTRL 0x22
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#define ACT8865_DCDC2_VSET1 0x30
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#define ACT8865_DCDC2_VSET2 0x31
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#define ACT8865_DCDC2_CTRL 0x32
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#define ACT8865_DCDC3_VSET1 0x40
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#define ACT8865_DCDC3_VSET2 0x41
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#define ACT8865_DCDC3_CTRL 0x42
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#define ACT8865_LDO1_VSET 0x50
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#define ACT8865_LDO1_CTRL 0x51
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#define ACT8865_LDO2_VSET 0x54
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#define ACT8865_LDO2_CTRL 0x55
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#define ACT8865_LDO3_VSET 0x60
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#define ACT8865_LDO3_CTRL 0x61
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#define ACT8865_LDO4_VSET 0x64
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#define ACT8865_LDO4_CTRL 0x65
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/*
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* Field Definitions.
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*/
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#define ACT8865_ENA 0x80 /* ON - [7] */
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#define ACT8865_VSEL_MASK 0x3F /* VSET - [5:0] */
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/*
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* ACT8865 voltage number
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*/
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#define ACT8865_VOLTAGE_NUM 64
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struct act8865 {
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struct regmap *regmap;
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};
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static const struct regmap_config act8865_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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static const struct regulator_linear_range act8865_volatge_ranges[] = {
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REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
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REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
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REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
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};
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static struct regulator_ops act8865_ops = {
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.list_voltage = regulator_list_voltage_linear_range,
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.map_voltage = regulator_map_voltage_linear_range,
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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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.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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};
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static const struct regulator_desc act8865_reg[] = {
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{
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.name = "DCDC_REG1",
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.id = ACT8865_ID_DCDC1,
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.ops = &act8865_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = ACT8865_VOLTAGE_NUM,
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.linear_ranges = act8865_volatge_ranges,
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.n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
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.vsel_reg = ACT8865_DCDC1_VSET1,
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.vsel_mask = ACT8865_VSEL_MASK,
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.enable_reg = ACT8865_DCDC1_CTRL,
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.enable_mask = ACT8865_ENA,
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.owner = THIS_MODULE,
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},
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{
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.name = "DCDC_REG2",
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.id = ACT8865_ID_DCDC2,
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.ops = &act8865_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = ACT8865_VOLTAGE_NUM,
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.linear_ranges = act8865_volatge_ranges,
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.n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
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.vsel_reg = ACT8865_DCDC2_VSET1,
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.vsel_mask = ACT8865_VSEL_MASK,
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.enable_reg = ACT8865_DCDC2_CTRL,
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.enable_mask = ACT8865_ENA,
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.owner = THIS_MODULE,
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},
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{
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.name = "DCDC_REG3",
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.id = ACT8865_ID_DCDC3,
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.ops = &act8865_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = ACT8865_VOLTAGE_NUM,
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.linear_ranges = act8865_volatge_ranges,
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.n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
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.vsel_reg = ACT8865_DCDC3_VSET1,
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.vsel_mask = ACT8865_VSEL_MASK,
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.enable_reg = ACT8865_DCDC3_CTRL,
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.enable_mask = ACT8865_ENA,
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.owner = THIS_MODULE,
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},
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{
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.name = "LDO_REG1",
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.id = ACT8865_ID_LDO1,
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.ops = &act8865_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = ACT8865_VOLTAGE_NUM,
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.linear_ranges = act8865_volatge_ranges,
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.n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
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.vsel_reg = ACT8865_LDO1_VSET,
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.vsel_mask = ACT8865_VSEL_MASK,
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.enable_reg = ACT8865_LDO1_CTRL,
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.enable_mask = ACT8865_ENA,
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.owner = THIS_MODULE,
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},
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{
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.name = "LDO_REG2",
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.id = ACT8865_ID_LDO2,
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.ops = &act8865_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = ACT8865_VOLTAGE_NUM,
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.linear_ranges = act8865_volatge_ranges,
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.n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
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.vsel_reg = ACT8865_LDO2_VSET,
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.vsel_mask = ACT8865_VSEL_MASK,
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.enable_reg = ACT8865_LDO2_CTRL,
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.enable_mask = ACT8865_ENA,
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.owner = THIS_MODULE,
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},
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{
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.name = "LDO_REG3",
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.id = ACT8865_ID_LDO3,
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.ops = &act8865_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = ACT8865_VOLTAGE_NUM,
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.linear_ranges = act8865_volatge_ranges,
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.n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
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.vsel_reg = ACT8865_LDO3_VSET,
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.vsel_mask = ACT8865_VSEL_MASK,
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.enable_reg = ACT8865_LDO3_CTRL,
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.enable_mask = ACT8865_ENA,
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.owner = THIS_MODULE,
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},
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{
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.name = "LDO_REG4",
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.id = ACT8865_ID_LDO4,
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.ops = &act8865_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = ACT8865_VOLTAGE_NUM,
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.linear_ranges = act8865_volatge_ranges,
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.n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
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.vsel_reg = ACT8865_LDO4_VSET,
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.vsel_mask = ACT8865_VSEL_MASK,
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.enable_reg = ACT8865_LDO4_CTRL,
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.enable_mask = ACT8865_ENA,
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.owner = THIS_MODULE,
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},
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};
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#ifdef CONFIG_OF
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static const struct of_device_id act8865_dt_ids[] = {
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{ .compatible = "active-semi,act8865" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, act8865_dt_ids);
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static struct of_regulator_match act8865_matches[] = {
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[ACT8865_ID_DCDC1] = { .name = "DCDC_REG1"},
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[ACT8865_ID_DCDC2] = { .name = "DCDC_REG2"},
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[ACT8865_ID_DCDC3] = { .name = "DCDC_REG3"},
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[ACT8865_ID_LDO1] = { .name = "LDO_REG1"},
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[ACT8865_ID_LDO2] = { .name = "LDO_REG2"},
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[ACT8865_ID_LDO3] = { .name = "LDO_REG3"},
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[ACT8865_ID_LDO4] = { .name = "LDO_REG4"},
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};
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static int act8865_pdata_from_dt(struct device *dev,
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struct device_node **of_node,
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struct act8865_platform_data *pdata)
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{
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int matched, i;
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struct device_node *np;
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struct act8865_regulator_data *regulator;
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np = of_get_child_by_name(dev->of_node, "regulators");
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if (!np) {
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dev_err(dev, "missing 'regulators' subnode in DT\n");
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return -EINVAL;
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}
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matched = of_regulator_match(dev, np,
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act8865_matches, ARRAY_SIZE(act8865_matches));
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of_node_put(np);
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if (matched <= 0)
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return matched;
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pdata->regulators = devm_kzalloc(dev,
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sizeof(struct act8865_regulator_data) *
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ARRAY_SIZE(act8865_matches), GFP_KERNEL);
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if (!pdata->regulators)
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return -ENOMEM;
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pdata->num_regulators = matched;
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regulator = pdata->regulators;
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for (i = 0; i < ARRAY_SIZE(act8865_matches); i++) {
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regulator->id = i;
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regulator->name = act8865_matches[i].name;
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regulator->platform_data = act8865_matches[i].init_data;
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of_node[i] = act8865_matches[i].of_node;
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regulator++;
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}
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return 0;
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}
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#else
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static inline int act8865_pdata_from_dt(struct device *dev,
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struct device_node **of_node,
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struct act8865_platform_data *pdata)
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{
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return 0;
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}
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#endif
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static int act8865_pmic_probe(struct i2c_client *client,
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const struct i2c_device_id *i2c_id)
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{
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struct regulator_dev *rdev;
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struct device *dev = &client->dev;
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struct act8865_platform_data *pdata = dev_get_platdata(dev);
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struct regulator_config config = { };
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struct act8865 *act8865;
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struct device_node *of_node[ACT8865_REG_NUM];
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int i, id;
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int ret = -EINVAL;
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int error;
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if (dev->of_node && !pdata) {
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const struct of_device_id *id;
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struct act8865_platform_data pdata_of;
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id = of_match_device(of_match_ptr(act8865_dt_ids), dev);
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if (!id)
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return -ENODEV;
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ret = act8865_pdata_from_dt(dev, of_node, &pdata_of);
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if (ret < 0)
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return ret;
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pdata = &pdata_of;
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}
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if (pdata->num_regulators > ACT8865_REG_NUM) {
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dev_err(dev, "Too many regulators found!\n");
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return -EINVAL;
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}
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act8865 = devm_kzalloc(dev, sizeof(struct act8865), GFP_KERNEL);
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if (!act8865)
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return -ENOMEM;
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act8865->regmap = devm_regmap_init_i2c(client, &act8865_regmap_config);
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if (IS_ERR(act8865->regmap)) {
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error = PTR_ERR(act8865->regmap);
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dev_err(&client->dev, "Failed to allocate register map: %d\n",
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error);
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return error;
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}
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/* Finally register devices */
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for (i = 0; i < ACT8865_REG_NUM; i++) {
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id = pdata->regulators[i].id;
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config.dev = dev;
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config.init_data = pdata->regulators[i].platform_data;
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config.of_node = of_node[i];
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config.driver_data = act8865;
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config.regmap = act8865->regmap;
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rdev = devm_regulator_register(&client->dev, &act8865_reg[i],
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&config);
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if (IS_ERR(rdev)) {
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dev_err(dev, "failed to register %s\n",
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act8865_reg[id].name);
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return PTR_ERR(rdev);
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}
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}
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i2c_set_clientdata(client, act8865);
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return 0;
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}
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static const struct i2c_device_id act8865_ids[] = {
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{ "act8865", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, act8865_ids);
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static struct i2c_driver act8865_pmic_driver = {
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.driver = {
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.name = "act8865",
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.owner = THIS_MODULE,
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},
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.probe = act8865_pmic_probe,
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.id_table = act8865_ids,
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};
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module_i2c_driver(act8865_pmic_driver);
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MODULE_DESCRIPTION("active-semi act8865 voltage regulator driver");
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MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
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MODULE_LICENSE("GPL v2");
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