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![Tomasz Figa](/assets/img/avatar_default.png)
This patch adds Device Tree support to max8998 driver. Signed-off-by: Tomasz Figa <t.figa@samsung.com> Acked-by: Mark Brown <broonie@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
939 lines
24 KiB
C
939 lines
24 KiB
C
/*
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* max8998.c - Voltage regulator driver for the Maxim 8998
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*
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* Copyright (C) 2009-2010 Samsung Electronics
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* Kyungmin Park <kyungmin.park@samsung.com>
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* Marek Szyprowski <m.szyprowski@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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#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/gpio.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include <linux/of_gpio.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/of_regulator.h>
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#include <linux/mfd/max8998.h>
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#include <linux/mfd/max8998-private.h>
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struct max8998_data {
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struct device *dev;
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struct max8998_dev *iodev;
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int num_regulators;
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struct regulator_dev **rdev;
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u8 buck1_vol[4]; /* voltages for selection */
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u8 buck2_vol[2];
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unsigned int buck1_idx; /* index to last changed voltage */
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/* value in a set */
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unsigned int buck2_idx;
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};
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struct voltage_map_desc {
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int min;
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int max;
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int step;
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};
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/* Voltage maps in uV*/
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static const struct voltage_map_desc ldo23_voltage_map_desc = {
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.min = 800000, .step = 50000, .max = 1300000,
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};
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static const struct voltage_map_desc ldo456711_voltage_map_desc = {
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.min = 1600000, .step = 100000, .max = 3600000,
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};
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static const struct voltage_map_desc ldo8_voltage_map_desc = {
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.min = 3000000, .step = 100000, .max = 3600000,
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};
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static const struct voltage_map_desc ldo9_voltage_map_desc = {
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.min = 2800000, .step = 100000, .max = 3100000,
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};
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static const struct voltage_map_desc ldo10_voltage_map_desc = {
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.min = 950000, .step = 50000, .max = 1300000,
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};
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static const struct voltage_map_desc ldo1213_voltage_map_desc = {
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.min = 800000, .step = 100000, .max = 3300000,
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};
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static const struct voltage_map_desc ldo1415_voltage_map_desc = {
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.min = 1200000, .step = 100000, .max = 3300000,
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};
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static const struct voltage_map_desc ldo1617_voltage_map_desc = {
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.min = 1600000, .step = 100000, .max = 3600000,
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};
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static const struct voltage_map_desc buck12_voltage_map_desc = {
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.min = 750000, .step = 25000, .max = 1525000,
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};
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static const struct voltage_map_desc buck3_voltage_map_desc = {
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.min = 1600000, .step = 100000, .max = 3600000,
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};
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static const struct voltage_map_desc buck4_voltage_map_desc = {
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.min = 800000, .step = 100000, .max = 2300000,
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};
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static const struct voltage_map_desc *ldo_voltage_map[] = {
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NULL,
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NULL,
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&ldo23_voltage_map_desc, /* LDO2 */
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&ldo23_voltage_map_desc, /* LDO3 */
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&ldo456711_voltage_map_desc, /* LDO4 */
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&ldo456711_voltage_map_desc, /* LDO5 */
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&ldo456711_voltage_map_desc, /* LDO6 */
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&ldo456711_voltage_map_desc, /* LDO7 */
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&ldo8_voltage_map_desc, /* LDO8 */
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&ldo9_voltage_map_desc, /* LDO9 */
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&ldo10_voltage_map_desc, /* LDO10 */
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&ldo456711_voltage_map_desc, /* LDO11 */
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&ldo1213_voltage_map_desc, /* LDO12 */
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&ldo1213_voltage_map_desc, /* LDO13 */
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&ldo1415_voltage_map_desc, /* LDO14 */
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&ldo1415_voltage_map_desc, /* LDO15 */
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&ldo1617_voltage_map_desc, /* LDO16 */
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&ldo1617_voltage_map_desc, /* LDO17 */
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&buck12_voltage_map_desc, /* BUCK1 */
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&buck12_voltage_map_desc, /* BUCK2 */
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&buck3_voltage_map_desc, /* BUCK3 */
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&buck4_voltage_map_desc, /* BUCK4 */
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};
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static int max8998_get_enable_register(struct regulator_dev *rdev,
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int *reg, int *shift)
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{
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int ldo = rdev_get_id(rdev);
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switch (ldo) {
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case MAX8998_LDO2 ... MAX8998_LDO5:
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*reg = MAX8998_REG_ONOFF1;
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*shift = 3 - (ldo - MAX8998_LDO2);
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break;
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case MAX8998_LDO6 ... MAX8998_LDO13:
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*reg = MAX8998_REG_ONOFF2;
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*shift = 7 - (ldo - MAX8998_LDO6);
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break;
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case MAX8998_LDO14 ... MAX8998_LDO17:
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*reg = MAX8998_REG_ONOFF3;
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*shift = 7 - (ldo - MAX8998_LDO14);
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break;
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case MAX8998_BUCK1 ... MAX8998_BUCK4:
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*reg = MAX8998_REG_ONOFF1;
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*shift = 7 - (ldo - MAX8998_BUCK1);
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break;
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case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG:
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*reg = MAX8998_REG_ONOFF4;
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*shift = 7 - (ldo - MAX8998_EN32KHZ_AP);
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break;
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case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2:
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*reg = MAX8998_REG_CHGR2;
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*shift = 7 - (ldo - MAX8998_ESAFEOUT1);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int max8998_ldo_is_enabled(struct regulator_dev *rdev)
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{
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struct max8998_data *max8998 = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = max8998->iodev->i2c;
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int ret, reg, shift = 8;
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u8 val;
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ret = max8998_get_enable_register(rdev, ®, &shift);
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if (ret)
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return ret;
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ret = max8998_read_reg(i2c, reg, &val);
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if (ret)
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return ret;
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return val & (1 << shift);
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}
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static int max8998_ldo_enable(struct regulator_dev *rdev)
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{
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struct max8998_data *max8998 = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = max8998->iodev->i2c;
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int reg, shift = 8, ret;
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ret = max8998_get_enable_register(rdev, ®, &shift);
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if (ret)
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return ret;
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return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift);
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}
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static int max8998_ldo_disable(struct regulator_dev *rdev)
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{
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struct max8998_data *max8998 = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = max8998->iodev->i2c;
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int reg, shift = 8, ret;
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ret = max8998_get_enable_register(rdev, ®, &shift);
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if (ret)
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return ret;
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return max8998_update_reg(i2c, reg, 0, 1<<shift);
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}
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static int max8998_get_voltage_register(struct regulator_dev *rdev,
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int *_reg, int *_shift, int *_mask)
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{
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int ldo = rdev_get_id(rdev);
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struct max8998_data *max8998 = rdev_get_drvdata(rdev);
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int reg, shift = 0, mask = 0xff;
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switch (ldo) {
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case MAX8998_LDO2 ... MAX8998_LDO3:
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reg = MAX8998_REG_LDO2_LDO3;
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mask = 0xf;
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if (ldo == MAX8998_LDO2)
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shift = 4;
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else
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shift = 0;
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break;
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case MAX8998_LDO4 ... MAX8998_LDO7:
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reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4);
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break;
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case MAX8998_LDO8 ... MAX8998_LDO9:
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reg = MAX8998_REG_LDO8_LDO9;
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mask = 0xf;
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if (ldo == MAX8998_LDO8)
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shift = 4;
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else
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shift = 0;
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break;
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case MAX8998_LDO10 ... MAX8998_LDO11:
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reg = MAX8998_REG_LDO10_LDO11;
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if (ldo == MAX8998_LDO10) {
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shift = 5;
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mask = 0x7;
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} else {
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shift = 0;
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mask = 0x1f;
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}
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break;
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case MAX8998_LDO12 ... MAX8998_LDO17:
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reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12);
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break;
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case MAX8998_BUCK1:
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reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx;
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break;
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case MAX8998_BUCK2:
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reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx;
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break;
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case MAX8998_BUCK3:
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reg = MAX8998_REG_BUCK3;
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break;
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case MAX8998_BUCK4:
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reg = MAX8998_REG_BUCK4;
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break;
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default:
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return -EINVAL;
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}
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*_reg = reg;
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*_shift = shift;
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*_mask = mask;
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return 0;
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}
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static int max8998_get_voltage_sel(struct regulator_dev *rdev)
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{
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struct max8998_data *max8998 = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = max8998->iodev->i2c;
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int reg, shift = 0, mask, ret;
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u8 val;
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ret = max8998_get_voltage_register(rdev, ®, &shift, &mask);
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if (ret)
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return ret;
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ret = max8998_read_reg(i2c, reg, &val);
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if (ret)
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return ret;
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val >>= shift;
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val &= mask;
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return val;
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}
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static int max8998_set_voltage_ldo_sel(struct regulator_dev *rdev,
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unsigned selector)
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{
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struct max8998_data *max8998 = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = max8998->iodev->i2c;
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int reg, shift = 0, mask, ret;
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ret = max8998_get_voltage_register(rdev, ®, &shift, &mask);
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if (ret)
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return ret;
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ret = max8998_update_reg(i2c, reg, selector<<shift, mask<<shift);
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return ret;
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}
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static inline void buck1_gpio_set(int gpio1, int gpio2, int v)
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{
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gpio_set_value(gpio1, v & 0x1);
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gpio_set_value(gpio2, (v >> 1) & 0x1);
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}
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static inline void buck2_gpio_set(int gpio, int v)
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{
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gpio_set_value(gpio, v & 0x1);
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}
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static int max8998_set_voltage_buck_sel(struct regulator_dev *rdev,
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unsigned selector)
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{
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struct max8998_data *max8998 = rdev_get_drvdata(rdev);
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struct max8998_platform_data *pdata =
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dev_get_platdata(max8998->iodev->dev);
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struct i2c_client *i2c = max8998->iodev->i2c;
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int buck = rdev_get_id(rdev);
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int reg, shift = 0, mask, ret, j;
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static u8 buck1_last_val;
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ret = max8998_get_voltage_register(rdev, ®, &shift, &mask);
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if (ret)
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return ret;
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switch (buck) {
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case MAX8998_BUCK1:
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dev_dbg(max8998->dev,
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"BUCK1, selector:%d, buck1_vol1:%d, buck1_vol2:%d\n"
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"buck1_vol3:%d, buck1_vol4:%d\n",
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selector, max8998->buck1_vol[0], max8998->buck1_vol[1],
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max8998->buck1_vol[2], max8998->buck1_vol[3]);
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if (gpio_is_valid(pdata->buck1_set1) &&
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gpio_is_valid(pdata->buck1_set2)) {
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/* check if requested voltage */
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/* value is already defined */
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for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) {
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if (max8998->buck1_vol[j] == selector) {
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max8998->buck1_idx = j;
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buck1_gpio_set(pdata->buck1_set1,
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pdata->buck1_set2, j);
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goto buck1_exit;
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}
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}
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if (pdata->buck_voltage_lock)
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return -EINVAL;
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/* no predefine regulator found */
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max8998->buck1_idx = (buck1_last_val % 2) + 2;
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dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n",
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max8998->buck1_idx);
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max8998->buck1_vol[max8998->buck1_idx] = selector;
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ret = max8998_get_voltage_register(rdev, ®,
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&shift,
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&mask);
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ret = max8998_write_reg(i2c, reg, selector);
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buck1_gpio_set(pdata->buck1_set1,
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pdata->buck1_set2, max8998->buck1_idx);
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buck1_last_val++;
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buck1_exit:
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dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n",
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i2c->name, gpio_get_value(pdata->buck1_set1),
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gpio_get_value(pdata->buck1_set2));
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break;
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} else {
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ret = max8998_write_reg(i2c, reg, selector);
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}
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break;
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case MAX8998_BUCK2:
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dev_dbg(max8998->dev,
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"BUCK2, selector:%d buck2_vol1:%d, buck2_vol2:%d\n",
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selector, max8998->buck2_vol[0], max8998->buck2_vol[1]);
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if (gpio_is_valid(pdata->buck2_set3)) {
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/* check if requested voltage */
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/* value is already defined */
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for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) {
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if (max8998->buck2_vol[j] == selector) {
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max8998->buck2_idx = j;
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buck2_gpio_set(pdata->buck2_set3, j);
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goto buck2_exit;
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}
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}
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if (pdata->buck_voltage_lock)
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return -EINVAL;
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max8998_get_voltage_register(rdev,
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®, &shift, &mask);
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ret = max8998_write_reg(i2c, reg, selector);
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max8998->buck2_vol[max8998->buck2_idx] = selector;
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buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx);
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buck2_exit:
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dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name,
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gpio_get_value(pdata->buck2_set3));
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} else {
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ret = max8998_write_reg(i2c, reg, selector);
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}
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break;
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case MAX8998_BUCK3:
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case MAX8998_BUCK4:
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ret = max8998_update_reg(i2c, reg, selector<<shift,
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mask<<shift);
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break;
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}
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return ret;
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}
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static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev,
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unsigned int old_selector,
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unsigned int new_selector)
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{
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struct max8998_data *max8998 = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = max8998->iodev->i2c;
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const struct voltage_map_desc *desc;
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int buck = rdev_get_id(rdev);
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u8 val = 0;
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int difference, ret;
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if (buck < MAX8998_BUCK1 || buck > MAX8998_BUCK4)
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return -EINVAL;
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desc = ldo_voltage_map[buck];
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/* Voltage stabilization */
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ret = max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val);
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if (ret)
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return ret;
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/* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */
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/* MAX8998 has ENRAMP bit implemented, so test it*/
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if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP))
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return 0;
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difference = (new_selector - old_selector) * desc->step / 1000;
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if (difference > 0)
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return DIV_ROUND_UP(difference, (val & 0x0f) + 1);
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return 0;
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}
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|
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static struct regulator_ops max8998_ldo_ops = {
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.list_voltage = regulator_list_voltage_linear,
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.map_voltage = regulator_map_voltage_linear,
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.is_enabled = max8998_ldo_is_enabled,
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.enable = max8998_ldo_enable,
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.disable = max8998_ldo_disable,
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.get_voltage_sel = max8998_get_voltage_sel,
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.set_voltage_sel = max8998_set_voltage_ldo_sel,
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};
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static struct regulator_ops max8998_buck_ops = {
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.list_voltage = regulator_list_voltage_linear,
|
|
.map_voltage = regulator_map_voltage_linear,
|
|
.is_enabled = max8998_ldo_is_enabled,
|
|
.enable = max8998_ldo_enable,
|
|
.disable = max8998_ldo_disable,
|
|
.get_voltage_sel = max8998_get_voltage_sel,
|
|
.set_voltage_sel = max8998_set_voltage_buck_sel,
|
|
.set_voltage_time_sel = max8998_set_voltage_buck_time_sel,
|
|
};
|
|
|
|
static struct regulator_ops max8998_others_ops = {
|
|
.is_enabled = max8998_ldo_is_enabled,
|
|
.enable = max8998_ldo_enable,
|
|
.disable = max8998_ldo_disable,
|
|
};
|
|
|
|
static struct regulator_desc regulators[] = {
|
|
{
|
|
.name = "LDO2",
|
|
.id = MAX8998_LDO2,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO3",
|
|
.id = MAX8998_LDO3,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO4",
|
|
.id = MAX8998_LDO4,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO5",
|
|
.id = MAX8998_LDO5,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO6",
|
|
.id = MAX8998_LDO6,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO7",
|
|
.id = MAX8998_LDO7,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO8",
|
|
.id = MAX8998_LDO8,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO9",
|
|
.id = MAX8998_LDO9,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO10",
|
|
.id = MAX8998_LDO10,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO11",
|
|
.id = MAX8998_LDO11,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO12",
|
|
.id = MAX8998_LDO12,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO13",
|
|
.id = MAX8998_LDO13,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO14",
|
|
.id = MAX8998_LDO14,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO15",
|
|
.id = MAX8998_LDO15,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO16",
|
|
.id = MAX8998_LDO16,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO17",
|
|
.id = MAX8998_LDO17,
|
|
.ops = &max8998_ldo_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "BUCK1",
|
|
.id = MAX8998_BUCK1,
|
|
.ops = &max8998_buck_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "BUCK2",
|
|
.id = MAX8998_BUCK2,
|
|
.ops = &max8998_buck_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "BUCK3",
|
|
.id = MAX8998_BUCK3,
|
|
.ops = &max8998_buck_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "BUCK4",
|
|
.id = MAX8998_BUCK4,
|
|
.ops = &max8998_buck_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "EN32KHz-AP",
|
|
.id = MAX8998_EN32KHZ_AP,
|
|
.ops = &max8998_others_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "EN32KHz-CP",
|
|
.id = MAX8998_EN32KHZ_CP,
|
|
.ops = &max8998_others_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "ENVICHG",
|
|
.id = MAX8998_ENVICHG,
|
|
.ops = &max8998_others_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "ESAFEOUT1",
|
|
.id = MAX8998_ESAFEOUT1,
|
|
.ops = &max8998_others_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "ESAFEOUT2",
|
|
.id = MAX8998_ESAFEOUT2,
|
|
.ops = &max8998_others_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}
|
|
};
|
|
|
|
static int max8998_pmic_dt_parse_dvs_gpio(struct max8998_dev *iodev,
|
|
struct max8998_platform_data *pdata,
|
|
struct device_node *pmic_np)
|
|
{
|
|
int gpio;
|
|
|
|
gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 0);
|
|
if (!gpio_is_valid(gpio)) {
|
|
dev_err(iodev->dev, "invalid buck1 gpio[0]: %d\n", gpio);
|
|
return -EINVAL;
|
|
}
|
|
pdata->buck1_set1 = gpio;
|
|
|
|
gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 1);
|
|
if (!gpio_is_valid(gpio)) {
|
|
dev_err(iodev->dev, "invalid buck1 gpio[1]: %d\n", gpio);
|
|
return -EINVAL;
|
|
}
|
|
pdata->buck1_set2 = gpio;
|
|
|
|
gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck2-dvs-gpio", 0);
|
|
if (!gpio_is_valid(gpio)) {
|
|
dev_err(iodev->dev, "invalid buck 2 gpio: %d\n", gpio);
|
|
return -EINVAL;
|
|
}
|
|
pdata->buck2_set3 = gpio;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int max8998_pmic_dt_parse_pdata(struct max8998_dev *iodev,
|
|
struct max8998_platform_data *pdata)
|
|
{
|
|
struct device_node *pmic_np = iodev->dev->of_node;
|
|
struct device_node *regulators_np, *reg_np;
|
|
struct max8998_regulator_data *rdata;
|
|
unsigned int i;
|
|
int ret;
|
|
|
|
regulators_np = of_get_child_by_name(pmic_np, "regulators");
|
|
if (!regulators_np) {
|
|
dev_err(iodev->dev, "could not find regulators sub-node\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* count the number of regulators to be supported in pmic */
|
|
pdata->num_regulators = of_get_child_count(regulators_np);
|
|
|
|
rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) *
|
|
pdata->num_regulators, GFP_KERNEL);
|
|
if (!rdata)
|
|
return -ENOMEM;
|
|
|
|
pdata->regulators = rdata;
|
|
for (i = 0; i < ARRAY_SIZE(regulators); ++i) {
|
|
reg_np = of_get_child_by_name(regulators_np,
|
|
regulators[i].name);
|
|
if (!reg_np)
|
|
continue;
|
|
|
|
rdata->id = regulators[i].id;
|
|
rdata->initdata = of_get_regulator_init_data(
|
|
iodev->dev, reg_np);
|
|
rdata->reg_node = reg_np;
|
|
++rdata;
|
|
}
|
|
pdata->num_regulators = rdata - pdata->regulators;
|
|
|
|
ret = max8998_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
|
|
if (ret)
|
|
return -EINVAL;
|
|
|
|
if (of_find_property(pmic_np, "max8998,pmic-buck-voltage-lock", NULL))
|
|
pdata->buck_voltage_lock = true;
|
|
|
|
ret = of_property_read_u32(pmic_np,
|
|
"max8998,pmic-buck1-default-dvs-idx",
|
|
&pdata->buck1_default_idx);
|
|
if (!ret && pdata->buck1_default_idx >= 4) {
|
|
pdata->buck1_default_idx = 0;
|
|
dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n");
|
|
}
|
|
|
|
ret = of_property_read_u32(pmic_np,
|
|
"max8998,pmic-buck2-default-dvs-idx",
|
|
&pdata->buck2_default_idx);
|
|
if (!ret && pdata->buck2_default_idx >= 2) {
|
|
pdata->buck2_default_idx = 0;
|
|
dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n");
|
|
}
|
|
|
|
ret = of_property_read_u32_array(pmic_np,
|
|
"max8998,pmic-buck1-dvs-voltage",
|
|
pdata->buck1_voltage,
|
|
ARRAY_SIZE(pdata->buck1_voltage));
|
|
if (ret) {
|
|
dev_err(iodev->dev, "buck1 voltages not specified\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = of_property_read_u32_array(pmic_np,
|
|
"max8998,pmic-buck2-dvs-voltage",
|
|
pdata->buck2_voltage,
|
|
ARRAY_SIZE(pdata->buck2_voltage));
|
|
if (ret) {
|
|
dev_err(iodev->dev, "buck2 voltages not specified\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int max8998_pmic_probe(struct platform_device *pdev)
|
|
{
|
|
struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
|
|
struct max8998_platform_data *pdata = iodev->pdata;
|
|
struct regulator_config config = { };
|
|
struct regulator_dev **rdev;
|
|
struct max8998_data *max8998;
|
|
struct i2c_client *i2c;
|
|
int i, ret, size;
|
|
unsigned int v;
|
|
|
|
if (!pdata) {
|
|
dev_err(pdev->dev.parent, "No platform init data supplied\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (IS_ENABLED(CONFIG_OF) && iodev->dev->of_node) {
|
|
ret = max8998_pmic_dt_parse_pdata(iodev, pdata);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data),
|
|
GFP_KERNEL);
|
|
if (!max8998)
|
|
return -ENOMEM;
|
|
|
|
size = sizeof(struct regulator_dev *) * pdata->num_regulators;
|
|
max8998->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
|
|
if (!max8998->rdev)
|
|
return -ENOMEM;
|
|
|
|
rdev = max8998->rdev;
|
|
max8998->dev = &pdev->dev;
|
|
max8998->iodev = iodev;
|
|
max8998->num_regulators = pdata->num_regulators;
|
|
platform_set_drvdata(pdev, max8998);
|
|
i2c = max8998->iodev->i2c;
|
|
|
|
max8998->buck1_idx = pdata->buck1_default_idx;
|
|
max8998->buck2_idx = pdata->buck2_default_idx;
|
|
|
|
/* NOTE: */
|
|
/* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */
|
|
/* will be displayed */
|
|
|
|
/* Check if MAX8998 voltage selection GPIOs are defined */
|
|
if (gpio_is_valid(pdata->buck1_set1) &&
|
|
gpio_is_valid(pdata->buck1_set2)) {
|
|
/* Check if SET1 is not equal to 0 */
|
|
if (!pdata->buck1_set1) {
|
|
dev_err(&pdev->dev,
|
|
"MAX8998 SET1 GPIO defined as 0 !\n");
|
|
WARN_ON(!pdata->buck1_set1);
|
|
ret = -EIO;
|
|
goto err_out;
|
|
}
|
|
/* Check if SET2 is not equal to 0 */
|
|
if (!pdata->buck1_set2) {
|
|
dev_err(&pdev->dev,
|
|
"MAX8998 SET2 GPIO defined as 0 !\n");
|
|
WARN_ON(!pdata->buck1_set2);
|
|
ret = -EIO;
|
|
goto err_out;
|
|
}
|
|
|
|
gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1");
|
|
gpio_direction_output(pdata->buck1_set1,
|
|
max8998->buck1_idx & 0x1);
|
|
|
|
|
|
gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2");
|
|
gpio_direction_output(pdata->buck1_set2,
|
|
(max8998->buck1_idx >> 1) & 0x1);
|
|
|
|
/* Set predefined values for BUCK1 registers */
|
|
for (v = 0; v < ARRAY_SIZE(pdata->buck1_voltage); ++v) {
|
|
i = 0;
|
|
while (buck12_voltage_map_desc.min +
|
|
buck12_voltage_map_desc.step*i
|
|
< pdata->buck1_voltage[v])
|
|
i++;
|
|
|
|
max8998->buck1_vol[v] = i;
|
|
ret = max8998_write_reg(i2c,
|
|
MAX8998_REG_BUCK1_VOLTAGE1 + v, i);
|
|
if (ret)
|
|
goto err_out;
|
|
}
|
|
}
|
|
|
|
if (gpio_is_valid(pdata->buck2_set3)) {
|
|
/* Check if SET3 is not equal to 0 */
|
|
if (!pdata->buck2_set3) {
|
|
dev_err(&pdev->dev,
|
|
"MAX8998 SET3 GPIO defined as 0 !\n");
|
|
WARN_ON(!pdata->buck2_set3);
|
|
ret = -EIO;
|
|
goto err_out;
|
|
}
|
|
gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3");
|
|
gpio_direction_output(pdata->buck2_set3,
|
|
max8998->buck2_idx & 0x1);
|
|
|
|
/* Set predefined values for BUCK2 registers */
|
|
for (v = 0; v < ARRAY_SIZE(pdata->buck2_voltage); ++v) {
|
|
i = 0;
|
|
while (buck12_voltage_map_desc.min +
|
|
buck12_voltage_map_desc.step*i
|
|
< pdata->buck2_voltage[v])
|
|
i++;
|
|
|
|
max8998->buck2_vol[v] = i;
|
|
ret = max8998_write_reg(i2c,
|
|
MAX8998_REG_BUCK2_VOLTAGE1 + v, i);
|
|
if (ret)
|
|
goto err_out;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < pdata->num_regulators; i++) {
|
|
const struct voltage_map_desc *desc;
|
|
int id = pdata->regulators[i].id;
|
|
int index = id - MAX8998_LDO2;
|
|
|
|
desc = ldo_voltage_map[id];
|
|
if (desc && regulators[index].ops != &max8998_others_ops) {
|
|
int count = (desc->max - desc->min) / desc->step + 1;
|
|
|
|
regulators[index].n_voltages = count;
|
|
regulators[index].min_uV = desc->min;
|
|
regulators[index].uV_step = desc->step;
|
|
}
|
|
|
|
config.dev = max8998->dev;
|
|
config.of_node = pdata->regulators[i].reg_node;
|
|
config.init_data = pdata->regulators[i].initdata;
|
|
config.driver_data = max8998;
|
|
|
|
rdev[i] = regulator_register(®ulators[index], &config);
|
|
if (IS_ERR(rdev[i])) {
|
|
ret = PTR_ERR(rdev[i]);
|
|
dev_err(max8998->dev, "regulator %s init failed (%d)\n",
|
|
regulators[index].name, ret);
|
|
rdev[i] = NULL;
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
|
|
return 0;
|
|
err:
|
|
while (--i >= 0)
|
|
regulator_unregister(rdev[i]);
|
|
err_out:
|
|
return ret;
|
|
}
|
|
|
|
static int max8998_pmic_remove(struct platform_device *pdev)
|
|
{
|
|
struct max8998_data *max8998 = platform_get_drvdata(pdev);
|
|
struct regulator_dev **rdev = max8998->rdev;
|
|
int i;
|
|
|
|
for (i = 0; i < max8998->num_regulators; i++)
|
|
regulator_unregister(rdev[i]);
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id max8998_pmic_id[] = {
|
|
{ "max8998-pmic", TYPE_MAX8998 },
|
|
{ "lp3974-pmic", TYPE_LP3974 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, max8998_pmic_id);
|
|
|
|
static struct platform_driver max8998_pmic_driver = {
|
|
.driver = {
|
|
.name = "max8998-pmic",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = max8998_pmic_probe,
|
|
.remove = max8998_pmic_remove,
|
|
.id_table = max8998_pmic_id,
|
|
};
|
|
|
|
static int __init max8998_pmic_init(void)
|
|
{
|
|
return platform_driver_register(&max8998_pmic_driver);
|
|
}
|
|
subsys_initcall(max8998_pmic_init);
|
|
|
|
static void __exit max8998_pmic_cleanup(void)
|
|
{
|
|
platform_driver_unregister(&max8998_pmic_driver);
|
|
}
|
|
module_exit(max8998_pmic_cleanup);
|
|
|
|
MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver");
|
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MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
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MODULE_LICENSE("GPL");
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