forked from luck/tmp_suning_uos_patched
222d0f0434
Simplify the driver by removing board file support and letting regulator core to parse DT. The max77693 regulator driver is used only on Exynos based boards which are DT-only. Board files for Exynos are not supported. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
205 lines
5.5 KiB
C
205 lines
5.5 KiB
C
/*
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* max77693.c - Regulator driver for the Maxim 77693
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*
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* Copyright (C) 2013 Samsung Electronics
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* Jonghwa Lee <jonghwa3.lee@samsung.com>
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* This driver is based on max77686.c
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*/
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/module.h>
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#include <linux/export.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/mfd/max77693.h>
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#include <linux/mfd/max77693-private.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/regmap.h>
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#define CHGIN_ILIM_STEP_20mA 20000
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/* CHARGER regulator ops */
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/* CHARGER regulator uses two bits for enabling */
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static int max77693_chg_is_enabled(struct regulator_dev *rdev)
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{
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int ret;
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unsigned int val;
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ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
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if (ret)
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return ret;
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return (val & rdev->desc->enable_mask) == rdev->desc->enable_mask;
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}
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/*
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* CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA
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* 0x00, 0x01, 0x2, 0x03 = 60 mA
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* 0x04 ~ 0x7E = (60 + (X - 3) * 20) mA
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*/
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static int max77693_chg_get_current_limit(struct regulator_dev *rdev)
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{
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unsigned int chg_min_uA = rdev->constraints->min_uA;
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unsigned int chg_max_uA = rdev->constraints->max_uA;
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unsigned int reg, sel;
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unsigned int val;
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int ret;
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ret = regmap_read(rdev->regmap, MAX77693_CHG_REG_CHG_CNFG_09, ®);
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if (ret < 0)
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return ret;
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sel = reg & CHG_CNFG_09_CHGIN_ILIM_MASK;
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/* the first four codes for charger current are all 60mA */
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if (sel <= 3)
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sel = 0;
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else
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sel -= 3;
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val = chg_min_uA + CHGIN_ILIM_STEP_20mA * sel;
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if (val > chg_max_uA)
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return -EINVAL;
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return val;
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}
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static int max77693_chg_set_current_limit(struct regulator_dev *rdev,
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int min_uA, int max_uA)
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{
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unsigned int chg_min_uA = rdev->constraints->min_uA;
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int sel = 0;
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while (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel < min_uA)
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sel++;
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if (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel > max_uA)
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return -EINVAL;
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/* the first four codes for charger current are all 60mA */
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sel += 3;
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return regmap_write(rdev->regmap,
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MAX77693_CHG_REG_CHG_CNFG_09, sel);
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}
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/* end of CHARGER regulator ops */
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static const unsigned int max77693_safeout_table[] = {
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4850000,
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4900000,
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4950000,
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3300000,
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};
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static struct regulator_ops max77693_safeout_ops = {
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.list_voltage = regulator_list_voltage_table,
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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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 struct regulator_ops max77693_charger_ops = {
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.is_enabled = max77693_chg_is_enabled,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.get_current_limit = max77693_chg_get_current_limit,
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.set_current_limit = max77693_chg_set_current_limit,
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};
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#define regulator_desc_esafeout(_num) { \
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.name = "ESAFEOUT"#_num, \
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.id = MAX77693_ESAFEOUT##_num, \
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.of_match = of_match_ptr("ESAFEOUT"#_num), \
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.regulators_node = of_match_ptr("regulators"), \
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.n_voltages = 4, \
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.ops = &max77693_safeout_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.volt_table = max77693_safeout_table, \
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.vsel_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \
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.vsel_mask = SAFEOUT_CTRL_SAFEOUT##_num##_MASK, \
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.enable_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \
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.enable_mask = SAFEOUT_CTRL_ENSAFEOUT##_num##_MASK , \
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}
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static const struct regulator_desc regulators[] = {
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regulator_desc_esafeout(1),
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regulator_desc_esafeout(2),
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{
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.name = "CHARGER",
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.id = MAX77693_CHARGER,
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.of_match = of_match_ptr("CHARGER"),
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.regulators_node = of_match_ptr("regulators"),
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.ops = &max77693_charger_ops,
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.type = REGULATOR_CURRENT,
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.owner = THIS_MODULE,
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.enable_reg = MAX77693_CHG_REG_CHG_CNFG_00,
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.enable_mask = CHG_CNFG_00_CHG_MASK |
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CHG_CNFG_00_BUCK_MASK,
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},
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};
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static int max77693_pmic_probe(struct platform_device *pdev)
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{
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struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent);
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int i;
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struct regulator_config config = { };
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config.dev = iodev->dev;
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config.regmap = iodev->regmap;
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for (i = 0; i < ARRAY_SIZE(regulators); i++) {
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struct regulator_dev *rdev;
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rdev = devm_regulator_register(&pdev->dev,
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®ulators[i], &config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev,
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"Failed to initialize regulator-%d\n", i);
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return PTR_ERR(rdev);
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}
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}
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return 0;
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}
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static const struct platform_device_id max77693_pmic_id[] = {
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{"max77693-pmic", 0},
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{},
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};
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MODULE_DEVICE_TABLE(platform, max77693_pmic_id);
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static struct platform_driver max77693_pmic_driver = {
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.driver = {
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.name = "max77693-pmic",
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},
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.probe = max77693_pmic_probe,
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.id_table = max77693_pmic_id,
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};
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module_platform_driver(max77693_pmic_driver);
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MODULE_DESCRIPTION("MAXIM MAX77693 regulator driver");
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MODULE_AUTHOR("Jonghwa Lee <jonghwa3.lee@samsung.com>");
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MODULE_LICENSE("GPL");
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