d04b755273
As Mark pointed out, the driver should register all regulators regardless of how many are used in the system in order to aid diagnostics. But in the previous patch, only register the regulators that are used. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Mark Brown <broonie@linaro.org>
350 lines
9.3 KiB
C
350 lines
9.3 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 regulator_dev *rdev[ACT8865_REG_NUM];
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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_find_node_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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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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dev_err(dev, "%s: failed to allocate act8865 registor\n",
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__func__);
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return -ENOMEM;
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}
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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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rdev = act8865->rdev;
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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 < ARRAY_SIZE(act8865_matches); 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[i] = devm_regulator_register(&client->dev,
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&act8865_reg[i], &config);
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if (IS_ERR(rdev[i])) {
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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[i]);
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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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