638 строки
15 KiB
C
638 строки
15 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/delay.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/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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};
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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 */
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static const struct voltage_map_desc ldo23_voltage_map_desc = {
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.min = 800, .step = 50, .max = 1300,
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};
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static const struct voltage_map_desc ldo456711_voltage_map_desc = {
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.min = 1600, .step = 100, .max = 3600,
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};
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static const struct voltage_map_desc ldo8_voltage_map_desc = {
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.min = 3000, .step = 100, .max = 3600,
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};
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static const struct voltage_map_desc ldo9_voltage_map_desc = {
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.min = 2800, .step = 100, .max = 3100,
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};
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static const struct voltage_map_desc ldo10_voltage_map_desc = {
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.min = 950, .step = 50, .max = 1300,
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};
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static const struct voltage_map_desc ldo1213_voltage_map_desc = {
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.min = 800, .step = 100, .max = 3300,
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};
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static const struct voltage_map_desc ldo1415_voltage_map_desc = {
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.min = 1200, .step = 100, .max = 3300,
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};
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static const struct voltage_map_desc ldo1617_voltage_map_desc = {
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.min = 1600, .step = 100, .max = 3600,
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};
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static const struct voltage_map_desc buck12_voltage_map_desc = {
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.min = 750, .step = 25, .max = 1525,
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};
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static const struct voltage_map_desc buck3_voltage_map_desc = {
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.min = 1600, .step = 100, .max = 3600,
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};
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static const struct voltage_map_desc buck4_voltage_map_desc = {
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.min = 800, .step = 100, .max = 2300,
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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 inline int max8998_get_ldo(struct regulator_dev *rdev)
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{
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return rdev_get_id(rdev);
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}
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static int max8998_list_voltage(struct regulator_dev *rdev,
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unsigned int selector)
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{
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const struct voltage_map_desc *desc;
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int ldo = max8998_get_ldo(rdev);
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int val;
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if (ldo >= ARRAY_SIZE(ldo_voltage_map))
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return -EINVAL;
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desc = ldo_voltage_map[ldo];
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if (desc == NULL)
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return -EINVAL;
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val = desc->min + desc->step * selector;
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if (val > desc->max)
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return -EINVAL;
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return val * 1000;
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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 = max8998_get_ldo(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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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(max8998->iodev, 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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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(max8998->iodev, 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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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(max8998->iodev, 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 = max8998_get_ldo(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_DVSARM1;
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break;
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case MAX8998_BUCK2:
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reg = MAX8998_REG_BUCK2_DVSINT1;
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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(struct regulator_dev *rdev)
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{
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struct max8998_data *max8998 = rdev_get_drvdata(rdev);
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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(max8998->iodev, 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 max8998_list_voltage(rdev, val);
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}
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static int max8998_set_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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struct max8998_data *max8998 = rdev_get_drvdata(rdev);
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int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
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int previous_vol = 0;
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const struct voltage_map_desc *desc;
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int ldo = max8998_get_ldo(rdev);
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int reg, shift = 0, mask, ret;
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int i = 0;
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u8 val;
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bool en_ramp = false;
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if (ldo >= ARRAY_SIZE(ldo_voltage_map))
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return -EINVAL;
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desc = ldo_voltage_map[ldo];
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if (desc == NULL)
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return -EINVAL;
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if (max_vol < desc->min || min_vol > desc->max)
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return -EINVAL;
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while (desc->min + desc->step*i < min_vol &&
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desc->min + desc->step*i < desc->max)
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i++;
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if (desc->min + desc->step*i > max_vol)
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return -EINVAL;
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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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/* wait for RAMP_UP_DELAY if rdev is BUCK1/2 and
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* ENRAMP is ON */
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if (ldo == MAX8998_BUCK1 || ldo == MAX8998_BUCK2) {
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max8998_read_reg(max8998->iodev, MAX8998_REG_ONOFF4, &val);
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if (val & (1 << 4)) {
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en_ramp = true;
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previous_vol = max8998_get_voltage(rdev);
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}
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}
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ret = max8998_update_reg(max8998->iodev, reg, i<<shift, mask<<shift);
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if (en_ramp == true) {
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int difference = desc->min + desc->step*i - previous_vol/1000;
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if (difference > 0)
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udelay(difference / ((val & 0x0f) + 1));
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}
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return ret;
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}
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static struct regulator_ops max8998_ldo_ops = {
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.list_voltage = max8998_list_voltage,
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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 = max8998_get_voltage,
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.set_voltage = max8998_set_voltage,
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.set_suspend_enable = max8998_ldo_enable,
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.set_suspend_disable = max8998_ldo_disable,
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};
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static struct regulator_ops max8998_buck_ops = {
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.list_voltage = max8998_list_voltage,
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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 = max8998_get_voltage,
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.set_voltage = max8998_set_voltage,
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.set_suspend_enable = max8998_ldo_enable,
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.set_suspend_disable = max8998_ldo_disable,
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};
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static struct regulator_ops max8998_others_ops = {
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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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.set_suspend_enable = max8998_ldo_enable,
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.set_suspend_disable = max8998_ldo_disable,
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};
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static struct regulator_desc regulators[] = {
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{
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.name = "LDO2",
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.id = MAX8998_LDO2,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO3",
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.id = MAX8998_LDO3,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO4",
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.id = MAX8998_LDO4,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO5",
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.id = MAX8998_LDO5,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO6",
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.id = MAX8998_LDO6,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO7",
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.id = MAX8998_LDO7,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO8",
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.id = MAX8998_LDO8,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO9",
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.id = MAX8998_LDO9,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO10",
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.id = MAX8998_LDO10,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO11",
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.id = MAX8998_LDO11,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO12",
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.id = MAX8998_LDO12,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO13",
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.id = MAX8998_LDO13,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO14",
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.id = MAX8998_LDO14,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO15",
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.id = MAX8998_LDO15,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO16",
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.id = MAX8998_LDO16,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO17",
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.id = MAX8998_LDO17,
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.ops = &max8998_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.name = "BUCK1",
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.id = MAX8998_BUCK1,
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.ops = &max8998_buck_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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}, {
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.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 __devinit int max8998_pmic_probe(struct platform_device *pdev)
|
|
{
|
|
struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
|
|
struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev);
|
|
struct regulator_dev **rdev;
|
|
struct max8998_data *max8998;
|
|
int i, ret, size;
|
|
|
|
if (!pdata) {
|
|
dev_err(pdev->dev.parent, "No platform init data supplied\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
max8998 = kzalloc(sizeof(struct max8998_data), GFP_KERNEL);
|
|
if (!max8998)
|
|
return -ENOMEM;
|
|
|
|
size = sizeof(struct regulator_dev *) * pdata->num_regulators;
|
|
max8998->rdev = kzalloc(size, GFP_KERNEL);
|
|
if (!max8998->rdev) {
|
|
kfree(max8998);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
rdev = max8998->rdev;
|
|
max8998->dev = &pdev->dev;
|
|
max8998->iodev = iodev;
|
|
max8998->num_regulators = pdata->num_regulators;
|
|
platform_set_drvdata(pdev, max8998);
|
|
|
|
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;
|
|
}
|
|
rdev[i] = regulator_register(®ulators[index], max8998->dev,
|
|
pdata->regulators[i].initdata, max8998);
|
|
if (IS_ERR(rdev[i])) {
|
|
ret = PTR_ERR(rdev[i]);
|
|
dev_err(max8998->dev, "regulator init failed\n");
|
|
rdev[i] = NULL;
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
|
|
return 0;
|
|
err:
|
|
for (i = 0; i < max8998->num_regulators; i++)
|
|
if (rdev[i])
|
|
regulator_unregister(rdev[i]);
|
|
|
|
kfree(max8998->rdev);
|
|
kfree(max8998);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit 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++)
|
|
if (rdev[i])
|
|
regulator_unregister(rdev[i]);
|
|
|
|
kfree(max8998->rdev);
|
|
kfree(max8998);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver max8998_pmic_driver = {
|
|
.driver = {
|
|
.name = "max8998-pmic",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = max8998_pmic_probe,
|
|
.remove = __devexit_p(max8998_pmic_remove),
|
|
};
|
|
|
|
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");
|
|
MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
|
|
MODULE_LICENSE("GPL");
|