1213 lines
30 KiB
C
1213 lines
30 KiB
C
/*
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* max8997.c - Regulator driver for the Maxim 8997/8966
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*
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* Copyright (C) 2011 Samsung Electronics
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* MyungJoo Ham <myungjoo.ham@smasung.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 max8998.c
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*/
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#include <linux/bug.h>
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#include <linux/delay.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/module.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/machine.h>
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#include <linux/mfd/max8997.h>
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#include <linux/mfd/max8997-private.h>
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struct max8997_data {
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struct device *dev;
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struct max8997_dev *iodev;
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int num_regulators;
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struct regulator_dev **rdev;
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int ramp_delay; /* in mV/us */
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bool buck1_gpiodvs;
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bool buck2_gpiodvs;
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bool buck5_gpiodvs;
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u8 buck1_vol[8];
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u8 buck2_vol[8];
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u8 buck5_vol[8];
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int buck125_gpios[3];
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int buck125_gpioindex;
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bool ignore_gpiodvs_side_effect;
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u8 saved_states[MAX8997_REG_MAX];
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};
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static inline void max8997_set_gpio(struct max8997_data *max8997)
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{
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int set3 = (max8997->buck125_gpioindex) & 0x1;
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int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1;
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int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1;
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gpio_set_value(max8997->buck125_gpios[0], set1);
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gpio_set_value(max8997->buck125_gpios[1], set2);
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gpio_set_value(max8997->buck125_gpios[2], set3);
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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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unsigned int n_bits;
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};
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/* Voltage maps in mV */
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static const struct voltage_map_desc ldo_voltage_map_desc = {
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.min = 800, .max = 3950, .step = 50, .n_bits = 6,
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}; /* LDO1 ~ 18, 21 all */
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static const struct voltage_map_desc buck1245_voltage_map_desc = {
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.min = 650, .max = 2225, .step = 25, .n_bits = 6,
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}; /* Buck1, 2, 4, 5 */
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static const struct voltage_map_desc buck37_voltage_map_desc = {
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.min = 750, .max = 3900, .step = 50, .n_bits = 6,
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}; /* Buck3, 7 */
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/* current map in mA */
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static const struct voltage_map_desc charger_current_map_desc = {
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.min = 200, .max = 950, .step = 50, .n_bits = 4,
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};
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static const struct voltage_map_desc topoff_current_map_desc = {
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.min = 50, .max = 200, .step = 10, .n_bits = 4,
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};
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static const struct voltage_map_desc *reg_voltage_map[] = {
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[MAX8997_LDO1] = &ldo_voltage_map_desc,
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[MAX8997_LDO2] = &ldo_voltage_map_desc,
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[MAX8997_LDO3] = &ldo_voltage_map_desc,
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[MAX8997_LDO4] = &ldo_voltage_map_desc,
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[MAX8997_LDO5] = &ldo_voltage_map_desc,
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[MAX8997_LDO6] = &ldo_voltage_map_desc,
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[MAX8997_LDO7] = &ldo_voltage_map_desc,
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[MAX8997_LDO8] = &ldo_voltage_map_desc,
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[MAX8997_LDO9] = &ldo_voltage_map_desc,
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[MAX8997_LDO10] = &ldo_voltage_map_desc,
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[MAX8997_LDO11] = &ldo_voltage_map_desc,
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[MAX8997_LDO12] = &ldo_voltage_map_desc,
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[MAX8997_LDO13] = &ldo_voltage_map_desc,
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[MAX8997_LDO14] = &ldo_voltage_map_desc,
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[MAX8997_LDO15] = &ldo_voltage_map_desc,
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[MAX8997_LDO16] = &ldo_voltage_map_desc,
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[MAX8997_LDO17] = &ldo_voltage_map_desc,
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[MAX8997_LDO18] = &ldo_voltage_map_desc,
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[MAX8997_LDO21] = &ldo_voltage_map_desc,
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[MAX8997_BUCK1] = &buck1245_voltage_map_desc,
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[MAX8997_BUCK2] = &buck1245_voltage_map_desc,
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[MAX8997_BUCK3] = &buck37_voltage_map_desc,
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[MAX8997_BUCK4] = &buck1245_voltage_map_desc,
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[MAX8997_BUCK5] = &buck1245_voltage_map_desc,
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[MAX8997_BUCK6] = NULL,
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[MAX8997_BUCK7] = &buck37_voltage_map_desc,
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[MAX8997_EN32KHZ_AP] = NULL,
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[MAX8997_EN32KHZ_CP] = NULL,
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[MAX8997_ENVICHG] = NULL,
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[MAX8997_ESAFEOUT1] = NULL,
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[MAX8997_ESAFEOUT2] = NULL,
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[MAX8997_CHARGER_CV] = NULL,
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[MAX8997_CHARGER] = &charger_current_map_desc,
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[MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc,
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};
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static int max8997_list_voltage_safeout(struct regulator_dev *rdev,
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unsigned int selector)
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{
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int rid = rdev_get_id(rdev);
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if (rid == MAX8997_ESAFEOUT1 || rid == MAX8997_ESAFEOUT2) {
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switch (selector) {
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case 0:
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return 4850000;
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case 1:
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return 4900000;
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case 2:
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return 4950000;
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case 3:
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return 3300000;
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default:
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return -EINVAL;
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}
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}
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return -EINVAL;
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}
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static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev,
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unsigned int selector)
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{
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int rid = rdev_get_id(rdev);
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if (rid != MAX8997_CHARGER_CV)
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goto err;
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switch (selector) {
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case 0x00:
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return 4200000;
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case 0x01 ... 0x0E:
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return 4000000 + 20000 * (selector - 0x01);
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case 0x0F:
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return 4350000;
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default:
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return -EINVAL;
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}
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err:
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return -EINVAL;
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}
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static int max8997_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 rid = rdev_get_id(rdev);
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int val;
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if (rid >= ARRAY_SIZE(reg_voltage_map) ||
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rid < 0)
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return -EINVAL;
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desc = reg_voltage_map[rid];
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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 max8997_get_enable_register(struct regulator_dev *rdev,
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int *reg, int *mask, int *pattern)
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{
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int rid = rdev_get_id(rdev);
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switch (rid) {
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case MAX8997_LDO1 ... MAX8997_LDO21:
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*reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
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*mask = 0xC0;
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*pattern = 0xC0;
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break;
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case MAX8997_BUCK1:
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*reg = MAX8997_REG_BUCK1CTRL;
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*mask = 0x01;
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*pattern = 0x01;
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break;
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case MAX8997_BUCK2:
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*reg = MAX8997_REG_BUCK2CTRL;
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*mask = 0x01;
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*pattern = 0x01;
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break;
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case MAX8997_BUCK3:
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*reg = MAX8997_REG_BUCK3CTRL;
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*mask = 0x01;
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*pattern = 0x01;
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break;
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case MAX8997_BUCK4:
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*reg = MAX8997_REG_BUCK4CTRL;
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*mask = 0x01;
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*pattern = 0x01;
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break;
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case MAX8997_BUCK5:
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*reg = MAX8997_REG_BUCK5CTRL;
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*mask = 0x01;
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*pattern = 0x01;
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break;
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case MAX8997_BUCK6:
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*reg = MAX8997_REG_BUCK6CTRL;
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*mask = 0x01;
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*pattern = 0x01;
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break;
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case MAX8997_BUCK7:
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*reg = MAX8997_REG_BUCK7CTRL;
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*mask = 0x01;
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*pattern = 0x01;
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break;
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case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP:
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*reg = MAX8997_REG_MAINCON1;
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*mask = 0x01 << (rid - MAX8997_EN32KHZ_AP);
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*pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP);
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break;
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case MAX8997_ENVICHG:
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*reg = MAX8997_REG_MBCCTRL1;
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*mask = 0x80;
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*pattern = 0x80;
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break;
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case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
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*reg = MAX8997_REG_SAFEOUTCTRL;
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*mask = 0x40 << (rid - MAX8997_ESAFEOUT1);
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*pattern = 0x40 << (rid - MAX8997_ESAFEOUT1);
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break;
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case MAX8997_CHARGER:
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*reg = MAX8997_REG_MBCCTRL2;
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*mask = 0x40;
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*pattern = 0x40;
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break;
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default:
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/* Not controllable or not exists */
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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 max8997_reg_is_enabled(struct regulator_dev *rdev)
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{
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struct max8997_data *max8997 = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = max8997->iodev->i2c;
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int ret, reg, mask, pattern;
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u8 val;
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ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
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if (ret == -EINVAL)
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return 1; /* "not controllable" */
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else if (ret)
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return ret;
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ret = max8997_read_reg(i2c, reg, &val);
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if (ret)
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return ret;
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return (val & mask) == pattern;
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}
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static int max8997_reg_enable(struct regulator_dev *rdev)
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{
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struct max8997_data *max8997 = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = max8997->iodev->i2c;
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int ret, reg, mask, pattern;
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ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
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if (ret)
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return ret;
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return max8997_update_reg(i2c, reg, pattern, mask);
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}
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static int max8997_reg_disable(struct regulator_dev *rdev)
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{
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struct max8997_data *max8997 = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = max8997->iodev->i2c;
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int ret, reg, mask, pattern;
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ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
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if (ret)
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return ret;
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return max8997_update_reg(i2c, reg, ~pattern, mask);
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}
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static int max8997_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 rid = rdev_get_id(rdev);
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int reg, shift = 0, mask = 0x3f;
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switch (rid) {
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case MAX8997_LDO1 ... MAX8997_LDO21:
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reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
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break;
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case MAX8997_BUCK1:
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reg = MAX8997_REG_BUCK1DVS1;
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break;
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case MAX8997_BUCK2:
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reg = MAX8997_REG_BUCK2DVS1;
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break;
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case MAX8997_BUCK3:
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reg = MAX8997_REG_BUCK3DVS;
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break;
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case MAX8997_BUCK4:
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reg = MAX8997_REG_BUCK4DVS;
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break;
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case MAX8997_BUCK5:
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reg = MAX8997_REG_BUCK5DVS1;
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break;
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case MAX8997_BUCK7:
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reg = MAX8997_REG_BUCK7DVS;
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break;
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case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
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reg = MAX8997_REG_SAFEOUTCTRL;
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shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0;
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mask = 0x3;
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break;
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case MAX8997_CHARGER_CV:
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reg = MAX8997_REG_MBCCTRL3;
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shift = 0;
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mask = 0xf;
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break;
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case MAX8997_CHARGER:
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reg = MAX8997_REG_MBCCTRL4;
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shift = 0;
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mask = 0xf;
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break;
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case MAX8997_CHARGER_TOPOFF:
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reg = MAX8997_REG_MBCCTRL5;
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shift = 0;
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mask = 0xf;
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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 max8997_get_voltage(struct regulator_dev *rdev)
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{
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struct max8997_data *max8997 = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = max8997->iodev->i2c;
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int reg, shift, mask, ret;
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int rid = rdev_get_id(rdev);
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u8 val;
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ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
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if (ret)
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return ret;
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if ((rid == MAX8997_BUCK1 && max8997->buck1_gpiodvs) ||
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(rid == MAX8997_BUCK2 && max8997->buck2_gpiodvs) ||
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(rid == MAX8997_BUCK5 && max8997->buck5_gpiodvs))
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reg += max8997->buck125_gpioindex;
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ret = max8997_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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if (rdev->desc && rdev->desc->ops && rdev->desc->ops->list_voltage)
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return rdev->desc->ops->list_voltage(rdev, val);
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/*
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* max8997_list_voltage returns value for any rdev with voltage_map,
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* which works for "CHARGER" and "CHARGER TOPOFF" that do not have
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* list_voltage ops (they are current regulators).
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*/
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return max8997_list_voltage(rdev, val);
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}
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static inline int max8997_get_voltage_proper_val(
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const struct voltage_map_desc *desc,
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int min_vol, int max_vol)
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{
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int i = 0;
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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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if (i >= (1 << desc->n_bits))
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return -EINVAL;
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return i;
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}
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static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev,
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int min_uV, int max_uV, unsigned *selector)
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{
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struct max8997_data *max8997 = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = max8997->iodev->i2c;
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int rid = rdev_get_id(rdev);
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int lb, ub;
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int reg, shift = 0, mask, ret = 0;
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u8 val = 0x0;
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if (rid != MAX8997_CHARGER_CV)
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return -EINVAL;
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ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
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if (ret)
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return ret;
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if (max_uV < 4000000 || min_uV > 4350000)
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return -EINVAL;
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if (min_uV <= 4000000) {
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if (max_uV >= 4000000)
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return -EINVAL;
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else
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val = 0x1;
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} else if (min_uV <= 4200000 && max_uV >= 4200000)
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val = 0x0;
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else {
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lb = (min_uV - 4000001) / 20000 + 2;
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ub = (max_uV - 4000000) / 20000 + 1;
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if (lb > ub)
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return -EINVAL;
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if (lb < 0xf)
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val = lb;
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else {
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if (ub >= 0xf)
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val = 0xf;
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else
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return -EINVAL;
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}
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}
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*selector = val;
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ret = max8997_update_reg(i2c, reg, val << shift, mask);
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|
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return ret;
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}
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|
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/*
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* For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF
|
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* BUCK1, 2, and 5 are available if they are not controlled by gpio
|
|
*/
|
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static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev,
|
|
int min_uV, int max_uV, unsigned *selector)
|
|
{
|
|
struct max8997_data *max8997 = rdev_get_drvdata(rdev);
|
|
struct i2c_client *i2c = max8997->iodev->i2c;
|
|
int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
|
|
const struct voltage_map_desc *desc;
|
|
int rid = rdev_get_id(rdev);
|
|
int reg, shift = 0, mask, ret;
|
|
int i;
|
|
u8 org;
|
|
|
|
switch (rid) {
|
|
case MAX8997_LDO1 ... MAX8997_LDO21:
|
|
break;
|
|
case MAX8997_BUCK1 ... MAX8997_BUCK5:
|
|
break;
|
|
case MAX8997_BUCK6:
|
|
return -EINVAL;
|
|
case MAX8997_BUCK7:
|
|
break;
|
|
case MAX8997_CHARGER:
|
|
break;
|
|
case MAX8997_CHARGER_TOPOFF:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
desc = reg_voltage_map[rid];
|
|
|
|
i = max8997_get_voltage_proper_val(desc, min_vol, max_vol);
|
|
if (i < 0)
|
|
return i;
|
|
|
|
ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
|
|
if (ret)
|
|
return ret;
|
|
|
|
max8997_read_reg(i2c, reg, &org);
|
|
org = (org & mask) >> shift;
|
|
|
|
ret = max8997_update_reg(i2c, reg, i << shift, mask << shift);
|
|
*selector = i;
|
|
|
|
if (rid == MAX8997_BUCK1 || rid == MAX8997_BUCK2 ||
|
|
rid == MAX8997_BUCK4 || rid == MAX8997_BUCK5) {
|
|
/* If the voltage is increasing */
|
|
if (org < i)
|
|
udelay(DIV_ROUND_UP(desc->step * (i - org),
|
|
max8997->ramp_delay));
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Assess the damage on the voltage setting of BUCK1,2,5 by the change.
|
|
*
|
|
* When GPIO-DVS mode is used for multiple bucks, changing the voltage value
|
|
* of one of the bucks may affect that of another buck, which is the side
|
|
* effect of the change (set_voltage). This function examines the GPIO-DVS
|
|
* configurations and checks whether such side-effect exists.
|
|
*/
|
|
static int max8997_assess_side_effect(struct regulator_dev *rdev,
|
|
u8 new_val, int *best)
|
|
{
|
|
struct max8997_data *max8997 = rdev_get_drvdata(rdev);
|
|
int rid = rdev_get_id(rdev);
|
|
u8 *buckx_val[3];
|
|
bool buckx_gpiodvs[3];
|
|
int side_effect[8];
|
|
int min_side_effect = INT_MAX;
|
|
int i;
|
|
|
|
*best = -1;
|
|
|
|
switch (rid) {
|
|
case MAX8997_BUCK1:
|
|
rid = 0;
|
|
break;
|
|
case MAX8997_BUCK2:
|
|
rid = 1;
|
|
break;
|
|
case MAX8997_BUCK5:
|
|
rid = 2;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
buckx_val[0] = max8997->buck1_vol;
|
|
buckx_val[1] = max8997->buck2_vol;
|
|
buckx_val[2] = max8997->buck5_vol;
|
|
buckx_gpiodvs[0] = max8997->buck1_gpiodvs;
|
|
buckx_gpiodvs[1] = max8997->buck2_gpiodvs;
|
|
buckx_gpiodvs[2] = max8997->buck5_gpiodvs;
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
int others;
|
|
|
|
if (new_val != (buckx_val[rid])[i]) {
|
|
side_effect[i] = -1;
|
|
continue;
|
|
}
|
|
|
|
side_effect[i] = 0;
|
|
for (others = 0; others < 3; others++) {
|
|
int diff;
|
|
|
|
if (others == rid)
|
|
continue;
|
|
if (buckx_gpiodvs[others] == false)
|
|
continue; /* Not affected */
|
|
diff = (buckx_val[others])[i] -
|
|
(buckx_val[others])[max8997->buck125_gpioindex];
|
|
if (diff > 0)
|
|
side_effect[i] += diff;
|
|
else if (diff < 0)
|
|
side_effect[i] -= diff;
|
|
}
|
|
if (side_effect[i] == 0) {
|
|
*best = i;
|
|
return 0; /* NO SIDE EFFECT! Use This! */
|
|
}
|
|
if (side_effect[i] < min_side_effect) {
|
|
min_side_effect = side_effect[i];
|
|
*best = i;
|
|
}
|
|
}
|
|
|
|
if (*best == -1)
|
|
return -EINVAL;
|
|
|
|
return side_effect[*best];
|
|
}
|
|
|
|
/*
|
|
* For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls
|
|
* max8997_set_voltage_ldobuck to do the job.
|
|
*/
|
|
static int max8997_set_voltage_buck(struct regulator_dev *rdev,
|
|
int min_uV, int max_uV, unsigned *selector)
|
|
{
|
|
struct max8997_data *max8997 = rdev_get_drvdata(rdev);
|
|
int rid = rdev_get_id(rdev);
|
|
const struct voltage_map_desc *desc;
|
|
int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg;
|
|
bool gpio_dvs_mode = false;
|
|
int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
|
|
|
|
if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7)
|
|
return -EINVAL;
|
|
|
|
switch (rid) {
|
|
case MAX8997_BUCK1:
|
|
if (max8997->buck1_gpiodvs)
|
|
gpio_dvs_mode = true;
|
|
break;
|
|
case MAX8997_BUCK2:
|
|
if (max8997->buck2_gpiodvs)
|
|
gpio_dvs_mode = true;
|
|
break;
|
|
case MAX8997_BUCK5:
|
|
if (max8997->buck5_gpiodvs)
|
|
gpio_dvs_mode = true;
|
|
break;
|
|
}
|
|
|
|
if (!gpio_dvs_mode)
|
|
return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV,
|
|
selector);
|
|
|
|
desc = reg_voltage_map[rid];
|
|
new_val = max8997_get_voltage_proper_val(desc, min_vol, max_vol);
|
|
if (new_val < 0)
|
|
return new_val;
|
|
|
|
tmp_dmg = INT_MAX;
|
|
tmp_idx = -1;
|
|
tmp_val = -1;
|
|
do {
|
|
damage = max8997_assess_side_effect(rdev, new_val, &new_idx);
|
|
if (damage == 0)
|
|
goto out;
|
|
|
|
if (tmp_dmg > damage) {
|
|
tmp_idx = new_idx;
|
|
tmp_val = new_val;
|
|
tmp_dmg = damage;
|
|
}
|
|
|
|
new_val++;
|
|
} while (desc->min + desc->step + new_val <= desc->max);
|
|
|
|
new_idx = tmp_idx;
|
|
new_val = tmp_val;
|
|
|
|
if (max8997->ignore_gpiodvs_side_effect == false)
|
|
return -EINVAL;
|
|
|
|
dev_warn(&rdev->dev, "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET:"
|
|
" %d -> %d\n", max8997->buck125_gpioindex, tmp_idx);
|
|
|
|
out:
|
|
if (new_idx < 0 || new_val < 0)
|
|
return -EINVAL;
|
|
|
|
max8997->buck125_gpioindex = new_idx;
|
|
max8997_set_gpio(max8997);
|
|
*selector = new_val;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const int safeoutvolt[] = {
|
|
3300000,
|
|
4850000,
|
|
4900000,
|
|
4950000,
|
|
};
|
|
|
|
/* For SAFEOUT1 and SAFEOUT2 */
|
|
static int max8997_set_voltage_safeout(struct regulator_dev *rdev,
|
|
int min_uV, int max_uV, unsigned *selector)
|
|
{
|
|
struct max8997_data *max8997 = rdev_get_drvdata(rdev);
|
|
struct i2c_client *i2c = max8997->iodev->i2c;
|
|
int rid = rdev_get_id(rdev);
|
|
int reg, shift = 0, mask, ret;
|
|
int i = 0;
|
|
u8 val;
|
|
|
|
if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(safeoutvolt); i++) {
|
|
if (min_uV <= safeoutvolt[i] &&
|
|
max_uV >= safeoutvolt[i])
|
|
break;
|
|
}
|
|
|
|
if (i >= ARRAY_SIZE(safeoutvolt))
|
|
return -EINVAL;
|
|
|
|
if (i == 0)
|
|
val = 0x3;
|
|
else
|
|
val = i - 1;
|
|
|
|
ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = max8997_update_reg(i2c, reg, val << shift, mask << shift);
|
|
*selector = val;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int max8997_reg_enable_suspend(struct regulator_dev *rdev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int max8997_reg_disable_suspend(struct regulator_dev *rdev)
|
|
{
|
|
struct max8997_data *max8997 = rdev_get_drvdata(rdev);
|
|
struct i2c_client *i2c = max8997->iodev->i2c;
|
|
int ret, reg, mask, pattern;
|
|
int rid = rdev_get_id(rdev);
|
|
|
|
ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
|
|
if (ret)
|
|
return ret;
|
|
|
|
max8997_read_reg(i2c, reg, &max8997->saved_states[rid]);
|
|
|
|
if (rid == MAX8997_LDO1 ||
|
|
rid == MAX8997_LDO10 ||
|
|
rid == MAX8997_LDO21) {
|
|
dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n",
|
|
rdev->desc->name);
|
|
return max8997_update_reg(i2c, reg, 0x40, mask);
|
|
}
|
|
|
|
dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n",
|
|
rdev->desc->name, max8997->saved_states[rid] & mask,
|
|
(~pattern) & mask);
|
|
return max8997_update_reg(i2c, reg, ~pattern, mask);
|
|
}
|
|
|
|
static struct regulator_ops max8997_ldo_ops = {
|
|
.list_voltage = max8997_list_voltage,
|
|
.is_enabled = max8997_reg_is_enabled,
|
|
.enable = max8997_reg_enable,
|
|
.disable = max8997_reg_disable,
|
|
.get_voltage = max8997_get_voltage,
|
|
.set_voltage = max8997_set_voltage_ldobuck,
|
|
.set_suspend_enable = max8997_reg_enable_suspend,
|
|
.set_suspend_disable = max8997_reg_disable_suspend,
|
|
};
|
|
|
|
static struct regulator_ops max8997_buck_ops = {
|
|
.list_voltage = max8997_list_voltage,
|
|
.is_enabled = max8997_reg_is_enabled,
|
|
.enable = max8997_reg_enable,
|
|
.disable = max8997_reg_disable,
|
|
.get_voltage = max8997_get_voltage,
|
|
.set_voltage = max8997_set_voltage_buck,
|
|
.set_suspend_enable = max8997_reg_enable_suspend,
|
|
.set_suspend_disable = max8997_reg_disable_suspend,
|
|
};
|
|
|
|
static struct regulator_ops max8997_fixedvolt_ops = {
|
|
.list_voltage = max8997_list_voltage,
|
|
.is_enabled = max8997_reg_is_enabled,
|
|
.enable = max8997_reg_enable,
|
|
.disable = max8997_reg_disable,
|
|
.set_suspend_enable = max8997_reg_enable_suspend,
|
|
.set_suspend_disable = max8997_reg_disable_suspend,
|
|
};
|
|
|
|
static struct regulator_ops max8997_safeout_ops = {
|
|
.list_voltage = max8997_list_voltage_safeout,
|
|
.is_enabled = max8997_reg_is_enabled,
|
|
.enable = max8997_reg_enable,
|
|
.disable = max8997_reg_disable,
|
|
.get_voltage = max8997_get_voltage,
|
|
.set_voltage = max8997_set_voltage_safeout,
|
|
.set_suspend_enable = max8997_reg_enable_suspend,
|
|
.set_suspend_disable = max8997_reg_disable_suspend,
|
|
};
|
|
|
|
static struct regulator_ops max8997_fixedstate_ops = {
|
|
.list_voltage = max8997_list_voltage_charger_cv,
|
|
.get_voltage = max8997_get_voltage,
|
|
.set_voltage = max8997_set_voltage_charger_cv,
|
|
};
|
|
|
|
static int max8997_set_voltage_ldobuck_wrap(struct regulator_dev *rdev,
|
|
int min_uV, int max_uV)
|
|
{
|
|
unsigned dummy;
|
|
|
|
return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, &dummy);
|
|
}
|
|
|
|
|
|
static struct regulator_ops max8997_charger_ops = {
|
|
.is_enabled = max8997_reg_is_enabled,
|
|
.enable = max8997_reg_enable,
|
|
.disable = max8997_reg_disable,
|
|
.get_current_limit = max8997_get_voltage,
|
|
.set_current_limit = max8997_set_voltage_ldobuck_wrap,
|
|
};
|
|
|
|
static struct regulator_ops max8997_charger_fixedstate_ops = {
|
|
.is_enabled = max8997_reg_is_enabled,
|
|
.get_current_limit = max8997_get_voltage,
|
|
.set_current_limit = max8997_set_voltage_ldobuck_wrap,
|
|
};
|
|
|
|
#define regulator_desc_ldo(num) { \
|
|
.name = "LDO"#num, \
|
|
.id = MAX8997_LDO##num, \
|
|
.ops = &max8997_ldo_ops, \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.owner = THIS_MODULE, \
|
|
}
|
|
#define regulator_desc_buck(num) { \
|
|
.name = "BUCK"#num, \
|
|
.id = MAX8997_BUCK##num, \
|
|
.ops = &max8997_buck_ops, \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.owner = THIS_MODULE, \
|
|
}
|
|
|
|
static struct regulator_desc regulators[] = {
|
|
regulator_desc_ldo(1),
|
|
regulator_desc_ldo(2),
|
|
regulator_desc_ldo(3),
|
|
regulator_desc_ldo(4),
|
|
regulator_desc_ldo(5),
|
|
regulator_desc_ldo(6),
|
|
regulator_desc_ldo(7),
|
|
regulator_desc_ldo(8),
|
|
regulator_desc_ldo(9),
|
|
regulator_desc_ldo(10),
|
|
regulator_desc_ldo(11),
|
|
regulator_desc_ldo(12),
|
|
regulator_desc_ldo(13),
|
|
regulator_desc_ldo(14),
|
|
regulator_desc_ldo(15),
|
|
regulator_desc_ldo(16),
|
|
regulator_desc_ldo(17),
|
|
regulator_desc_ldo(18),
|
|
regulator_desc_ldo(21),
|
|
regulator_desc_buck(1),
|
|
regulator_desc_buck(2),
|
|
regulator_desc_buck(3),
|
|
regulator_desc_buck(4),
|
|
regulator_desc_buck(5),
|
|
{
|
|
.name = "BUCK6",
|
|
.id = MAX8997_BUCK6,
|
|
.ops = &max8997_fixedvolt_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
regulator_desc_buck(7),
|
|
{
|
|
.name = "EN32KHz_AP",
|
|
.id = MAX8997_EN32KHZ_AP,
|
|
.ops = &max8997_fixedvolt_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "EN32KHz_CP",
|
|
.id = MAX8997_EN32KHZ_CP,
|
|
.ops = &max8997_fixedvolt_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "ENVICHG",
|
|
.id = MAX8997_ENVICHG,
|
|
.ops = &max8997_fixedvolt_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "ESAFEOUT1",
|
|
.id = MAX8997_ESAFEOUT1,
|
|
.ops = &max8997_safeout_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "ESAFEOUT2",
|
|
.id = MAX8997_ESAFEOUT2,
|
|
.ops = &max8997_safeout_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "CHARGER_CV",
|
|
.id = MAX8997_CHARGER_CV,
|
|
.ops = &max8997_fixedstate_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "CHARGER",
|
|
.id = MAX8997_CHARGER,
|
|
.ops = &max8997_charger_ops,
|
|
.type = REGULATOR_CURRENT,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "CHARGER_TOPOFF",
|
|
.id = MAX8997_CHARGER_TOPOFF,
|
|
.ops = &max8997_charger_fixedstate_ops,
|
|
.type = REGULATOR_CURRENT,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static __devinit int max8997_pmic_probe(struct platform_device *pdev)
|
|
{
|
|
struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
|
|
struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
|
|
struct regulator_dev **rdev;
|
|
struct max8997_data *max8997;
|
|
struct i2c_client *i2c;
|
|
int i, ret, size;
|
|
u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0;
|
|
|
|
if (!pdata) {
|
|
dev_err(pdev->dev.parent, "No platform init data supplied.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
max8997 = kzalloc(sizeof(struct max8997_data), GFP_KERNEL);
|
|
if (!max8997)
|
|
return -ENOMEM;
|
|
|
|
size = sizeof(struct regulator_dev *) * pdata->num_regulators;
|
|
max8997->rdev = kzalloc(size, GFP_KERNEL);
|
|
if (!max8997->rdev) {
|
|
kfree(max8997);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
rdev = max8997->rdev;
|
|
max8997->dev = &pdev->dev;
|
|
max8997->iodev = iodev;
|
|
max8997->num_regulators = pdata->num_regulators;
|
|
platform_set_drvdata(pdev, max8997);
|
|
i2c = max8997->iodev->i2c;
|
|
|
|
max8997->buck125_gpioindex = pdata->buck125_default_idx;
|
|
max8997->buck1_gpiodvs = pdata->buck1_gpiodvs;
|
|
max8997->buck2_gpiodvs = pdata->buck2_gpiodvs;
|
|
max8997->buck5_gpiodvs = pdata->buck5_gpiodvs;
|
|
memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3);
|
|
max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect;
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
max8997->buck1_vol[i] = ret =
|
|
max8997_get_voltage_proper_val(
|
|
&buck1245_voltage_map_desc,
|
|
pdata->buck1_voltage[i] / 1000,
|
|
pdata->buck1_voltage[i] / 1000 +
|
|
buck1245_voltage_map_desc.step);
|
|
if (ret < 0)
|
|
goto err_alloc;
|
|
|
|
max8997->buck2_vol[i] = ret =
|
|
max8997_get_voltage_proper_val(
|
|
&buck1245_voltage_map_desc,
|
|
pdata->buck2_voltage[i] / 1000,
|
|
pdata->buck2_voltage[i] / 1000 +
|
|
buck1245_voltage_map_desc.step);
|
|
if (ret < 0)
|
|
goto err_alloc;
|
|
|
|
max8997->buck5_vol[i] = ret =
|
|
max8997_get_voltage_proper_val(
|
|
&buck1245_voltage_map_desc,
|
|
pdata->buck5_voltage[i] / 1000,
|
|
pdata->buck5_voltage[i] / 1000 +
|
|
buck1245_voltage_map_desc.step);
|
|
if (ret < 0)
|
|
goto err_alloc;
|
|
|
|
if (max_buck1 < max8997->buck1_vol[i])
|
|
max_buck1 = max8997->buck1_vol[i];
|
|
if (max_buck2 < max8997->buck2_vol[i])
|
|
max_buck2 = max8997->buck2_vol[i];
|
|
if (max_buck5 < max8997->buck5_vol[i])
|
|
max_buck5 = max8997->buck5_vol[i];
|
|
}
|
|
|
|
/* For the safety, set max voltage before setting up */
|
|
for (i = 0; i < 8; i++) {
|
|
max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
|
|
max_buck1, 0x3f);
|
|
max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
|
|
max_buck2, 0x3f);
|
|
max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
|
|
max_buck5, 0x3f);
|
|
}
|
|
|
|
/*
|
|
* If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them.
|
|
* If at least one of them cares, set gpios.
|
|
*/
|
|
if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
|
|
pdata->buck5_gpiodvs) {
|
|
bool gpio1set = false, gpio2set = false;
|
|
|
|
if (!gpio_is_valid(pdata->buck125_gpios[0]) ||
|
|
!gpio_is_valid(pdata->buck125_gpios[1]) ||
|
|
!gpio_is_valid(pdata->buck125_gpios[2])) {
|
|
dev_err(&pdev->dev, "GPIO NOT VALID\n");
|
|
ret = -EINVAL;
|
|
goto err_alloc;
|
|
}
|
|
|
|
ret = gpio_request(pdata->buck125_gpios[0],
|
|
"MAX8997 SET1");
|
|
if (ret == -EBUSY)
|
|
dev_warn(&pdev->dev, "Duplicated gpio request"
|
|
" on SET1\n");
|
|
else if (ret)
|
|
goto err_alloc;
|
|
else
|
|
gpio1set = true;
|
|
|
|
ret = gpio_request(pdata->buck125_gpios[1],
|
|
"MAX8997 SET2");
|
|
if (ret == -EBUSY)
|
|
dev_warn(&pdev->dev, "Duplicated gpio request"
|
|
" on SET2\n");
|
|
else if (ret) {
|
|
if (gpio1set)
|
|
gpio_free(pdata->buck125_gpios[0]);
|
|
goto err_alloc;
|
|
} else
|
|
gpio2set = true;
|
|
|
|
ret = gpio_request(pdata->buck125_gpios[2],
|
|
"MAX8997 SET3");
|
|
if (ret == -EBUSY)
|
|
dev_warn(&pdev->dev, "Duplicated gpio request"
|
|
" on SET3\n");
|
|
else if (ret) {
|
|
if (gpio1set)
|
|
gpio_free(pdata->buck125_gpios[0]);
|
|
if (gpio2set)
|
|
gpio_free(pdata->buck125_gpios[1]);
|
|
goto err_alloc;
|
|
}
|
|
|
|
gpio_direction_output(pdata->buck125_gpios[0],
|
|
(max8997->buck125_gpioindex >> 2)
|
|
& 0x1); /* SET1 */
|
|
gpio_direction_output(pdata->buck125_gpios[1],
|
|
(max8997->buck125_gpioindex >> 1)
|
|
& 0x1); /* SET2 */
|
|
gpio_direction_output(pdata->buck125_gpios[2],
|
|
(max8997->buck125_gpioindex >> 0)
|
|
& 0x1); /* SET3 */
|
|
ret = 0;
|
|
}
|
|
|
|
/* DVS-GPIO disabled */
|
|
max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ?
|
|
(1 << 1) : (0 << 1), 1 << 1);
|
|
max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ?
|
|
(1 << 1) : (0 << 1), 1 << 1);
|
|
max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ?
|
|
(1 << 1) : (0 << 1), 1 << 1);
|
|
|
|
/* Initialize all the DVS related BUCK registers */
|
|
for (i = 0; i < 8; i++) {
|
|
max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
|
|
max8997->buck1_vol[i],
|
|
0x3f);
|
|
max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
|
|
max8997->buck2_vol[i],
|
|
0x3f);
|
|
max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
|
|
max8997->buck5_vol[i],
|
|
0x3f);
|
|
}
|
|
|
|
/* Misc Settings */
|
|
max8997->ramp_delay = 10; /* set 10mV/us, which is the default */
|
|
max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9);
|
|
|
|
for (i = 0; i < pdata->num_regulators; i++) {
|
|
const struct voltage_map_desc *desc;
|
|
int id = pdata->regulators[i].id;
|
|
|
|
desc = reg_voltage_map[id];
|
|
if (desc)
|
|
regulators[id].n_voltages =
|
|
(desc->max - desc->min) / desc->step + 1;
|
|
else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2)
|
|
regulators[id].n_voltages = 4;
|
|
else if (id == MAX8997_CHARGER_CV)
|
|
regulators[id].n_voltages = 16;
|
|
|
|
rdev[i] = regulator_register(®ulators[id], max8997->dev,
|
|
pdata->regulators[i].initdata, max8997, NULL);
|
|
if (IS_ERR(rdev[i])) {
|
|
ret = PTR_ERR(rdev[i]);
|
|
dev_err(max8997->dev, "regulator init failed for %d\n",
|
|
id);
|
|
rdev[i] = NULL;
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
err:
|
|
for (i = 0; i < max8997->num_regulators; i++)
|
|
if (rdev[i])
|
|
regulator_unregister(rdev[i]);
|
|
err_alloc:
|
|
kfree(max8997->rdev);
|
|
kfree(max8997);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit max8997_pmic_remove(struct platform_device *pdev)
|
|
{
|
|
struct max8997_data *max8997 = platform_get_drvdata(pdev);
|
|
struct regulator_dev **rdev = max8997->rdev;
|
|
int i;
|
|
|
|
for (i = 0; i < max8997->num_regulators; i++)
|
|
if (rdev[i])
|
|
regulator_unregister(rdev[i]);
|
|
|
|
kfree(max8997->rdev);
|
|
kfree(max8997);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id max8997_pmic_id[] = {
|
|
{ "max8997-pmic", 0},
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, max8997_pmic_id);
|
|
|
|
static struct platform_driver max8997_pmic_driver = {
|
|
.driver = {
|
|
.name = "max8997-pmic",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = max8997_pmic_probe,
|
|
.remove = __devexit_p(max8997_pmic_remove),
|
|
.id_table = max8997_pmic_id,
|
|
};
|
|
|
|
static int __init max8997_pmic_init(void)
|
|
{
|
|
return platform_driver_register(&max8997_pmic_driver);
|
|
}
|
|
subsys_initcall(max8997_pmic_init);
|
|
|
|
static void __exit max8997_pmic_cleanup(void)
|
|
{
|
|
platform_driver_unregister(&max8997_pmic_driver);
|
|
}
|
|
module_exit(max8997_pmic_cleanup);
|
|
|
|
MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver");
|
|
MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
|
|
MODULE_LICENSE("GPL");
|