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1224 lines
31 KiB
1224 lines
31 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// |
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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 <[email protected]> |
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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/err.h> |
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#include <linux/gpio.h> |
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#include <linux/of_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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#include <linux/regulator/of_regulator.h> |
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|
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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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int ramp_delay; /* in mV/us */ |
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|
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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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|
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u8 saved_states[MAX8997_REG_MAX]; |
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}; |
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|
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static const unsigned int safeoutvolt[] = { |
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4850000, |
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4900000, |
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4950000, |
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3300000, |
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}; |
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|
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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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}; |
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|
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/* Voltage maps in uV */ |
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static const struct voltage_map_desc ldo_voltage_map_desc = { |
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.min = 800000, .max = 3950000, .step = 50000, |
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}; /* LDO1 ~ 18, 21 all */ |
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|
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static const struct voltage_map_desc buck1245_voltage_map_desc = { |
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.min = 650000, .max = 2225000, .step = 25000, |
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}; /* Buck1, 2, 4, 5 */ |
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|
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static const struct voltage_map_desc buck37_voltage_map_desc = { |
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.min = 750000, .max = 3900000, .step = 50000, |
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}; /* Buck3, 7 */ |
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|
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/* current map in uA */ |
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static const struct voltage_map_desc charger_current_map_desc = { |
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.min = 200000, .max = 950000, .step = 50000, |
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}; |
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static const struct voltage_map_desc topoff_current_map_desc = { |
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.min = 50000, .max = 200000, .step = 10000, |
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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_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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|
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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 < 0 || rid >= ARRAY_SIZE(reg_voltage_map)) |
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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; |
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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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|
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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) |
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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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struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
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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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if (max8997->buck1_gpiodvs) |
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reg += max8997->buck125_gpioindex; |
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break; |
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case MAX8997_BUCK2: |
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reg = MAX8997_REG_BUCK2DVS1; |
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if (max8997->buck2_gpiodvs) |
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reg += max8997->buck125_gpioindex; |
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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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if (max8997->buck5_gpiodvs) |
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reg += max8997->buck125_gpioindex; |
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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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|
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return 0; |
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} |
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static int max8997_get_voltage_sel(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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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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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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return val; |
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} |
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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; |
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|
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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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if (min_vol < desc->min) |
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min_vol = desc->min; |
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i = DIV_ROUND_UP(min_vol - desc->min, desc->step); |
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|
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if (desc->min + desc->step * i > max_vol) |
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return -EINVAL; |
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|
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return i; |
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} |
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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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|
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if (rid != MAX8997_CHARGER_CV) |
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return -EINVAL; |
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|
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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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|
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if (min_uV <= 4000000) |
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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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|
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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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|
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*selector = val; |
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|
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ret = max8997_update_reg(i2c, reg, val << shift, mask); |
|
|
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return ret; |
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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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*/ |
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static int max8997_set_voltage_ldobuck(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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const struct voltage_map_desc *desc; |
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int rid = rdev_get_id(rdev); |
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int i, reg, shift, mask, ret; |
|
|
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switch (rid) { |
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case MAX8997_LDO1 ... MAX8997_LDO21: |
|
break; |
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case MAX8997_BUCK1 ... MAX8997_BUCK5: |
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break; |
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case MAX8997_BUCK6: |
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return -EINVAL; |
|
case MAX8997_BUCK7: |
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break; |
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case MAX8997_CHARGER: |
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break; |
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case MAX8997_CHARGER_TOPOFF: |
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break; |
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default: |
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return -EINVAL; |
|
} |
|
|
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desc = reg_voltage_map[rid]; |
|
|
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i = max8997_get_voltage_proper_val(desc, min_uV, max_uV); |
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if (i < 0) |
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return i; |
|
|
|
ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); |
|
if (ret) |
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return ret; |
|
|
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ret = max8997_update_reg(i2c, reg, i << shift, mask << shift); |
|
*selector = i; |
|
|
|
return ret; |
|
} |
|
|
|
static int max8997_set_voltage_buck_time_sel(struct regulator_dev *rdev, |
|
unsigned int old_selector, |
|
unsigned int new_selector) |
|
{ |
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struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
|
int rid = rdev_get_id(rdev); |
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const struct voltage_map_desc *desc = reg_voltage_map[rid]; |
|
|
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/* Delay is required only if the voltage is increasing */ |
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if (old_selector >= new_selector) |
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return 0; |
|
|
|
/* No need to delay if gpio_dvs_mode */ |
|
switch (rid) { |
|
case MAX8997_BUCK1: |
|
if (max8997->buck1_gpiodvs) |
|
return 0; |
|
break; |
|
case MAX8997_BUCK2: |
|
if (max8997->buck2_gpiodvs) |
|
return 0; |
|
break; |
|
case MAX8997_BUCK5: |
|
if (max8997->buck5_gpiodvs) |
|
return 0; |
|
break; |
|
} |
|
|
|
switch (rid) { |
|
case MAX8997_BUCK1: |
|
case MAX8997_BUCK2: |
|
case MAX8997_BUCK4: |
|
case MAX8997_BUCK5: |
|
return DIV_ROUND_UP(desc->step * (new_selector - old_selector), |
|
max8997->ramp_delay * 1000); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* 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; |
|
|
|
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_uV, max_uV); |
|
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; |
|
} |
|
|
|
/* For SAFEOUT1 and SAFEOUT2 */ |
|
static int max8997_set_voltage_safeout_sel(struct regulator_dev *rdev, |
|
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; |
|
|
|
if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2) |
|
return -EINVAL; |
|
|
|
ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); |
|
if (ret) |
|
return ret; |
|
|
|
return max8997_update_reg(i2c, reg, selector << shift, mask << shift); |
|
} |
|
|
|
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 const 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_sel = max8997_get_voltage_sel, |
|
.set_voltage = max8997_set_voltage_ldobuck, |
|
.set_suspend_disable = max8997_reg_disable_suspend, |
|
}; |
|
|
|
static const 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_sel = max8997_get_voltage_sel, |
|
.set_voltage = max8997_set_voltage_buck, |
|
.set_voltage_time_sel = max8997_set_voltage_buck_time_sel, |
|
.set_suspend_disable = max8997_reg_disable_suspend, |
|
}; |
|
|
|
static const 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_disable = max8997_reg_disable_suspend, |
|
}; |
|
|
|
static const struct regulator_ops max8997_safeout_ops = { |
|
.list_voltage = regulator_list_voltage_table, |
|
.is_enabled = max8997_reg_is_enabled, |
|
.enable = max8997_reg_enable, |
|
.disable = max8997_reg_disable, |
|
.get_voltage_sel = max8997_get_voltage_sel, |
|
.set_voltage_sel = max8997_set_voltage_safeout_sel, |
|
.set_suspend_disable = max8997_reg_disable_suspend, |
|
}; |
|
|
|
static const struct regulator_ops max8997_fixedstate_ops = { |
|
.list_voltage = max8997_list_voltage_charger_cv, |
|
.get_voltage_sel = max8997_get_voltage_sel, |
|
.set_voltage = max8997_set_voltage_charger_cv, |
|
}; |
|
|
|
static int max8997_set_current_limit(struct regulator_dev *rdev, |
|
int min_uA, int max_uA) |
|
{ |
|
unsigned dummy; |
|
int rid = rdev_get_id(rdev); |
|
|
|
if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) |
|
return -EINVAL; |
|
|
|
/* Reuse max8997_set_voltage_ldobuck to set current_limit. */ |
|
return max8997_set_voltage_ldobuck(rdev, min_uA, max_uA, &dummy); |
|
} |
|
|
|
static int max8997_get_current_limit(struct regulator_dev *rdev) |
|
{ |
|
int sel, rid = rdev_get_id(rdev); |
|
|
|
if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) |
|
return -EINVAL; |
|
|
|
sel = max8997_get_voltage_sel(rdev); |
|
if (sel < 0) |
|
return sel; |
|
|
|
/* Reuse max8997_list_voltage to get current_limit. */ |
|
return max8997_list_voltage(rdev, sel); |
|
} |
|
|
|
static const 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_current_limit, |
|
.set_current_limit = max8997_set_current_limit, |
|
}; |
|
|
|
static const struct regulator_ops max8997_charger_fixedstate_ops = { |
|
.get_current_limit = max8997_get_current_limit, |
|
.set_current_limit = max8997_set_current_limit, |
|
}; |
|
|
|
#define MAX8997_VOLTAGE_REGULATOR(_name, _ops) {\ |
|
.name = #_name, \ |
|
.id = MAX8997_##_name, \ |
|
.ops = &_ops, \ |
|
.type = REGULATOR_VOLTAGE, \ |
|
.owner = THIS_MODULE, \ |
|
} |
|
|
|
#define MAX8997_CURRENT_REGULATOR(_name, _ops) {\ |
|
.name = #_name, \ |
|
.id = MAX8997_##_name, \ |
|
.ops = &_ops, \ |
|
.type = REGULATOR_CURRENT, \ |
|
.owner = THIS_MODULE, \ |
|
} |
|
|
|
static struct regulator_desc regulators[] = { |
|
MAX8997_VOLTAGE_REGULATOR(LDO1, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO2, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO3, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO4, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO5, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO6, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO7, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO8, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO9, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO10, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO11, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO12, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO13, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO14, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO15, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO16, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO17, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO18, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(LDO21, max8997_ldo_ops), |
|
MAX8997_VOLTAGE_REGULATOR(BUCK1, max8997_buck_ops), |
|
MAX8997_VOLTAGE_REGULATOR(BUCK2, max8997_buck_ops), |
|
MAX8997_VOLTAGE_REGULATOR(BUCK3, max8997_buck_ops), |
|
MAX8997_VOLTAGE_REGULATOR(BUCK4, max8997_buck_ops), |
|
MAX8997_VOLTAGE_REGULATOR(BUCK5, max8997_buck_ops), |
|
MAX8997_VOLTAGE_REGULATOR(BUCK6, max8997_fixedvolt_ops), |
|
MAX8997_VOLTAGE_REGULATOR(BUCK7, max8997_buck_ops), |
|
MAX8997_VOLTAGE_REGULATOR(EN32KHZ_AP, max8997_fixedvolt_ops), |
|
MAX8997_VOLTAGE_REGULATOR(EN32KHZ_CP, max8997_fixedvolt_ops), |
|
MAX8997_VOLTAGE_REGULATOR(ENVICHG, max8997_fixedvolt_ops), |
|
MAX8997_VOLTAGE_REGULATOR(ESAFEOUT1, max8997_safeout_ops), |
|
MAX8997_VOLTAGE_REGULATOR(ESAFEOUT2, max8997_safeout_ops), |
|
MAX8997_VOLTAGE_REGULATOR(CHARGER_CV, max8997_fixedstate_ops), |
|
MAX8997_CURRENT_REGULATOR(CHARGER, max8997_charger_ops), |
|
MAX8997_CURRENT_REGULATOR(CHARGER_TOPOFF, |
|
max8997_charger_fixedstate_ops), |
|
}; |
|
|
|
#ifdef CONFIG_OF |
|
static int max8997_pmic_dt_parse_dvs_gpio(struct platform_device *pdev, |
|
struct max8997_platform_data *pdata, |
|
struct device_node *pmic_np) |
|
{ |
|
int i, gpio; |
|
|
|
for (i = 0; i < 3; i++) { |
|
gpio = of_get_named_gpio(pmic_np, |
|
"max8997,pmic-buck125-dvs-gpios", i); |
|
if (!gpio_is_valid(gpio)) { |
|
dev_err(&pdev->dev, "invalid gpio[%d]: %d\n", i, gpio); |
|
return -EINVAL; |
|
} |
|
pdata->buck125_gpios[i] = gpio; |
|
} |
|
return 0; |
|
} |
|
|
|
static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev, |
|
struct max8997_platform_data *pdata) |
|
{ |
|
struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); |
|
struct device_node *pmic_np, *regulators_np, *reg_np; |
|
struct max8997_regulator_data *rdata; |
|
unsigned int i, dvs_voltage_nr = 1, ret; |
|
|
|
pmic_np = iodev->dev->of_node; |
|
if (!pmic_np) { |
|
dev_err(&pdev->dev, "could not find pmic sub-node\n"); |
|
return -ENODEV; |
|
} |
|
|
|
regulators_np = of_get_child_by_name(pmic_np, "regulators"); |
|
if (!regulators_np) { |
|
dev_err(&pdev->dev, "could not find regulators sub-node\n"); |
|
return -EINVAL; |
|
} |
|
|
|
/* count the number of regulators to be supported in pmic */ |
|
pdata->num_regulators = of_get_child_count(regulators_np); |
|
|
|
rdata = devm_kcalloc(&pdev->dev, |
|
pdata->num_regulators, sizeof(*rdata), |
|
GFP_KERNEL); |
|
if (!rdata) { |
|
of_node_put(regulators_np); |
|
return -ENOMEM; |
|
} |
|
|
|
pdata->regulators = rdata; |
|
for_each_child_of_node(regulators_np, reg_np) { |
|
for (i = 0; i < ARRAY_SIZE(regulators); i++) |
|
if (of_node_name_eq(reg_np, regulators[i].name)) |
|
break; |
|
|
|
if (i == ARRAY_SIZE(regulators)) { |
|
dev_warn(&pdev->dev, "don't know how to configure regulator %pOFn\n", |
|
reg_np); |
|
continue; |
|
} |
|
|
|
rdata->id = i; |
|
rdata->initdata = of_get_regulator_init_data(&pdev->dev, |
|
reg_np, |
|
®ulators[i]); |
|
rdata->reg_node = reg_np; |
|
rdata++; |
|
} |
|
of_node_put(regulators_np); |
|
|
|
if (of_get_property(pmic_np, "max8997,pmic-buck1-uses-gpio-dvs", NULL)) |
|
pdata->buck1_gpiodvs = true; |
|
|
|
if (of_get_property(pmic_np, "max8997,pmic-buck2-uses-gpio-dvs", NULL)) |
|
pdata->buck2_gpiodvs = true; |
|
|
|
if (of_get_property(pmic_np, "max8997,pmic-buck5-uses-gpio-dvs", NULL)) |
|
pdata->buck5_gpiodvs = true; |
|
|
|
if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || |
|
pdata->buck5_gpiodvs) { |
|
ret = max8997_pmic_dt_parse_dvs_gpio(pdev, pdata, pmic_np); |
|
if (ret) |
|
return -EINVAL; |
|
|
|
if (of_property_read_u32(pmic_np, |
|
"max8997,pmic-buck125-default-dvs-idx", |
|
&pdata->buck125_default_idx)) { |
|
pdata->buck125_default_idx = 0; |
|
} else { |
|
if (pdata->buck125_default_idx >= 8) { |
|
pdata->buck125_default_idx = 0; |
|
dev_info(&pdev->dev, "invalid value for default dvs index, using 0 instead\n"); |
|
} |
|
} |
|
|
|
if (of_get_property(pmic_np, |
|
"max8997,pmic-ignore-gpiodvs-side-effect", NULL)) |
|
pdata->ignore_gpiodvs_side_effect = true; |
|
|
|
dvs_voltage_nr = 8; |
|
} |
|
|
|
if (of_property_read_u32_array(pmic_np, |
|
"max8997,pmic-buck1-dvs-voltage", |
|
pdata->buck1_voltage, dvs_voltage_nr)) { |
|
dev_err(&pdev->dev, "buck1 voltages not specified\n"); |
|
return -EINVAL; |
|
} |
|
|
|
if (of_property_read_u32_array(pmic_np, |
|
"max8997,pmic-buck2-dvs-voltage", |
|
pdata->buck2_voltage, dvs_voltage_nr)) { |
|
dev_err(&pdev->dev, "buck2 voltages not specified\n"); |
|
return -EINVAL; |
|
} |
|
|
|
if (of_property_read_u32_array(pmic_np, |
|
"max8997,pmic-buck5-dvs-voltage", |
|
pdata->buck5_voltage, dvs_voltage_nr)) { |
|
dev_err(&pdev->dev, "buck5 voltages not specified\n"); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
#else |
|
static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev, |
|
struct max8997_platform_data *pdata) |
|
{ |
|
return 0; |
|
} |
|
#endif /* CONFIG_OF */ |
|
|
|
static int max8997_pmic_probe(struct platform_device *pdev) |
|
{ |
|
struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); |
|
struct max8997_platform_data *pdata = iodev->pdata; |
|
struct regulator_config config = { }; |
|
struct regulator_dev *rdev; |
|
struct max8997_data *max8997; |
|
struct i2c_client *i2c; |
|
int i, ret, nr_dvs; |
|
u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; |
|
|
|
if (!pdata) { |
|
dev_err(&pdev->dev, "No platform init data supplied.\n"); |
|
return -ENODEV; |
|
} |
|
|
|
if (iodev->dev->of_node) { |
|
ret = max8997_pmic_dt_parse_pdata(pdev, pdata); |
|
if (ret) |
|
return ret; |
|
} |
|
|
|
max8997 = devm_kzalloc(&pdev->dev, sizeof(struct max8997_data), |
|
GFP_KERNEL); |
|
if (!max8997) |
|
return -ENOMEM; |
|
|
|
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; |
|
|
|
nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || |
|
pdata->buck5_gpiodvs) ? 8 : 1; |
|
|
|
for (i = 0; i < nr_dvs; i++) { |
|
max8997->buck1_vol[i] = ret = |
|
max8997_get_voltage_proper_val( |
|
&buck1245_voltage_map_desc, |
|
pdata->buck1_voltage[i], |
|
pdata->buck1_voltage[i] + |
|
buck1245_voltage_map_desc.step); |
|
if (ret < 0) |
|
return ret; |
|
|
|
max8997->buck2_vol[i] = ret = |
|
max8997_get_voltage_proper_val( |
|
&buck1245_voltage_map_desc, |
|
pdata->buck2_voltage[i], |
|
pdata->buck2_voltage[i] + |
|
buck1245_voltage_map_desc.step); |
|
if (ret < 0) |
|
return ret; |
|
|
|
max8997->buck5_vol[i] = ret = |
|
max8997_get_voltage_proper_val( |
|
&buck1245_voltage_map_desc, |
|
pdata->buck5_voltage[i], |
|
pdata->buck5_voltage[i] + |
|
buck1245_voltage_map_desc.step); |
|
if (ret < 0) |
|
return ret; |
|
|
|
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); |
|
} |
|
|
|
/* Initialize all the DVS related BUCK registers */ |
|
for (i = 0; i < nr_dvs; 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); |
|
} |
|
|
|
/* |
|
* 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) { |
|
|
|
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"); |
|
return -EINVAL; |
|
} |
|
|
|
ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[0], |
|
"MAX8997 SET1"); |
|
if (ret) |
|
return ret; |
|
|
|
ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[1], |
|
"MAX8997 SET2"); |
|
if (ret) |
|
return ret; |
|
|
|
ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[2], |
|
"MAX8997 SET3"); |
|
if (ret) |
|
return ret; |
|
|
|
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 */ |
|
} |
|
|
|
/* 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); |
|
|
|
/* 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].volt_table = safeoutvolt; |
|
regulators[id].n_voltages = ARRAY_SIZE(safeoutvolt); |
|
} else if (id == MAX8997_CHARGER_CV) { |
|
regulators[id].n_voltages = 16; |
|
} |
|
|
|
config.dev = max8997->dev; |
|
config.init_data = pdata->regulators[i].initdata; |
|
config.driver_data = max8997; |
|
config.of_node = pdata->regulators[i].reg_node; |
|
|
|
rdev = devm_regulator_register(&pdev->dev, ®ulators[id], |
|
&config); |
|
if (IS_ERR(rdev)) { |
|
dev_err(max8997->dev, "regulator init failed for %d\n", |
|
id); |
|
return PTR_ERR(rdev); |
|
} |
|
} |
|
|
|
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", |
|
}, |
|
.probe = max8997_pmic_probe, |
|
.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 <[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|