537 lines
13 KiB
C
537 lines
13 KiB
C
/*
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* da9211-regulator.c - Regulator device driver for DA9211/DA9212
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* /DA9213/DA9223/DA9214/DA9224/DA9215/DA9225
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* Copyright (C) 2015 Dialog Semiconductor Ltd.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*/
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.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/regmap.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/of_gpio.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/regulator/da9211.h>
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#include "da9211-regulator.h"
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/* DEVICE IDs */
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#define DA9211_DEVICE_ID 0x22
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#define DA9213_DEVICE_ID 0x23
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#define DA9215_DEVICE_ID 0x24
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#define DA9211_BUCK_MODE_SLEEP 1
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#define DA9211_BUCK_MODE_SYNC 2
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#define DA9211_BUCK_MODE_AUTO 3
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/* DA9211 REGULATOR IDs */
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#define DA9211_ID_BUCKA 0
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#define DA9211_ID_BUCKB 1
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struct da9211 {
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struct device *dev;
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struct regmap *regmap;
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struct da9211_pdata *pdata;
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struct regulator_dev *rdev[DA9211_MAX_REGULATORS];
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int num_regulator;
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int chip_irq;
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int chip_id;
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};
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static const struct regmap_range_cfg da9211_regmap_range[] = {
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{
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.selector_reg = DA9211_REG_PAGE_CON,
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.selector_mask = DA9211_REG_PAGE_MASK,
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.selector_shift = DA9211_REG_PAGE_SHIFT,
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.window_start = 0,
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.window_len = 256,
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.range_min = 0,
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.range_max = 5*128,
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},
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};
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static const struct regmap_config da9211_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = 5 * 128,
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.ranges = da9211_regmap_range,
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.num_ranges = ARRAY_SIZE(da9211_regmap_range),
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};
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/* Default limits measured in millivolts and milliamps */
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#define DA9211_MIN_MV 300
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#define DA9211_MAX_MV 1570
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#define DA9211_STEP_MV 10
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/* Current limits for DA9211 buck (uA) indices
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* corresponds with register values
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*/
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static const int da9211_current_limits[] = {
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2000000, 2200000, 2400000, 2600000, 2800000, 3000000, 3200000, 3400000,
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3600000, 3800000, 4000000, 4200000, 4400000, 4600000, 4800000, 5000000
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};
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/* Current limits for DA9213 buck (uA) indices
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* corresponds with register values
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*/
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static const int da9213_current_limits[] = {
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3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
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4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
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};
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/* Current limits for DA9215 buck (uA) indices
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* corresponds with register values
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*/
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static const int da9215_current_limits[] = {
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4000000, 4200000, 4400000, 4600000, 4800000, 5000000, 5200000, 5400000,
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5600000, 5800000, 6000000, 6200000, 6400000, 6600000, 6800000, 7000000
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};
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static unsigned int da9211_buck_get_mode(struct regulator_dev *rdev)
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{
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int id = rdev_get_id(rdev);
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struct da9211 *chip = rdev_get_drvdata(rdev);
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unsigned int data;
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int ret, mode = 0;
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ret = regmap_read(chip->regmap, DA9211_REG_BUCKA_CONF+id, &data);
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if (ret < 0)
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return ret;
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switch (data & 0x03) {
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case DA9211_BUCK_MODE_SYNC:
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mode = REGULATOR_MODE_FAST;
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break;
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case DA9211_BUCK_MODE_AUTO:
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mode = REGULATOR_MODE_NORMAL;
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break;
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case DA9211_BUCK_MODE_SLEEP:
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mode = REGULATOR_MODE_STANDBY;
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break;
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}
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return mode;
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}
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static int da9211_buck_set_mode(struct regulator_dev *rdev,
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unsigned int mode)
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{
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int id = rdev_get_id(rdev);
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struct da9211 *chip = rdev_get_drvdata(rdev);
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int val = 0;
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switch (mode) {
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case REGULATOR_MODE_FAST:
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val = DA9211_BUCK_MODE_SYNC;
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break;
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case REGULATOR_MODE_NORMAL:
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val = DA9211_BUCK_MODE_AUTO;
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break;
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case REGULATOR_MODE_STANDBY:
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val = DA9211_BUCK_MODE_SLEEP;
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break;
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}
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return regmap_update_bits(chip->regmap, DA9211_REG_BUCKA_CONF+id,
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0x03, val);
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}
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static int da9211_set_current_limit(struct regulator_dev *rdev, int min,
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int max)
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{
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int id = rdev_get_id(rdev);
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struct da9211 *chip = rdev_get_drvdata(rdev);
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int i, max_size;
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const int *current_limits;
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switch (chip->chip_id) {
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case DA9211:
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current_limits = da9211_current_limits;
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max_size = ARRAY_SIZE(da9211_current_limits)-1;
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break;
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case DA9213:
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current_limits = da9213_current_limits;
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max_size = ARRAY_SIZE(da9213_current_limits)-1;
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break;
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case DA9215:
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current_limits = da9215_current_limits;
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max_size = ARRAY_SIZE(da9215_current_limits)-1;
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break;
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default:
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return -EINVAL;
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}
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/* search for closest to maximum */
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for (i = max_size; i >= 0; i--) {
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if (min <= current_limits[i] &&
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max >= current_limits[i]) {
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return regmap_update_bits(chip->regmap,
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DA9211_REG_BUCK_ILIM,
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(0x0F << id*4), (i << id*4));
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}
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}
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return -EINVAL;
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}
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static int da9211_get_current_limit(struct regulator_dev *rdev)
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{
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int id = rdev_get_id(rdev);
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struct da9211 *chip = rdev_get_drvdata(rdev);
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unsigned int data;
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int ret;
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const int *current_limits;
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switch (chip->chip_id) {
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case DA9211:
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current_limits = da9211_current_limits;
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break;
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case DA9213:
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current_limits = da9213_current_limits;
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break;
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case DA9215:
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current_limits = da9215_current_limits;
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break;
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default:
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return -EINVAL;
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}
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ret = regmap_read(chip->regmap, DA9211_REG_BUCK_ILIM, &data);
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if (ret < 0)
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return ret;
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/* select one of 16 values: 0000 (2000mA or 3000mA)
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* to 1111 (5000mA or 6000mA).
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*/
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data = (data >> id*4) & 0x0F;
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return current_limits[data];
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}
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static const struct regulator_ops da9211_buck_ops = {
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.get_mode = da9211_buck_get_mode,
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.set_mode = da9211_buck_set_mode,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.list_voltage = regulator_list_voltage_linear,
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.set_current_limit = da9211_set_current_limit,
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.get_current_limit = da9211_get_current_limit,
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};
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#define DA9211_BUCK(_id) \
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{\
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.name = #_id,\
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.ops = &da9211_buck_ops,\
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.type = REGULATOR_VOLTAGE,\
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.id = DA9211_ID_##_id,\
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.n_voltages = (DA9211_MAX_MV - DA9211_MIN_MV) / DA9211_STEP_MV + 1,\
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.min_uV = (DA9211_MIN_MV * 1000),\
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.uV_step = (DA9211_STEP_MV * 1000),\
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.enable_reg = DA9211_REG_BUCKA_CONT + DA9211_ID_##_id,\
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.enable_mask = DA9211_BUCKA_EN,\
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.vsel_reg = DA9211_REG_VBUCKA_A + DA9211_ID_##_id * 2,\
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.vsel_mask = DA9211_VBUCK_MASK,\
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.owner = THIS_MODULE,\
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}
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static struct regulator_desc da9211_regulators[] = {
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DA9211_BUCK(BUCKA),
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DA9211_BUCK(BUCKB),
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};
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#ifdef CONFIG_OF
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static struct of_regulator_match da9211_matches[] = {
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[DA9211_ID_BUCKA] = { .name = "BUCKA" },
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[DA9211_ID_BUCKB] = { .name = "BUCKB" },
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};
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static struct da9211_pdata *da9211_parse_regulators_dt(
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struct device *dev)
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{
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struct da9211_pdata *pdata;
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struct device_node *node;
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int i, num, n;
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node = of_get_child_by_name(dev->of_node, "regulators");
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if (!node) {
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dev_err(dev, "regulators node not found\n");
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return ERR_PTR(-ENODEV);
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}
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num = of_regulator_match(dev, node, da9211_matches,
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ARRAY_SIZE(da9211_matches));
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of_node_put(node);
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if (num < 0) {
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dev_err(dev, "Failed to match regulators\n");
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return ERR_PTR(-EINVAL);
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}
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pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return ERR_PTR(-ENOMEM);
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pdata->num_buck = num;
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n = 0;
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for (i = 0; i < ARRAY_SIZE(da9211_matches); i++) {
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if (!da9211_matches[i].init_data)
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continue;
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pdata->init_data[n] = da9211_matches[i].init_data;
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pdata->reg_node[n] = da9211_matches[i].of_node;
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pdata->gpio_ren[n] =
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of_get_named_gpio(da9211_matches[i].of_node,
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"enable-gpios", 0);
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n++;
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}
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return pdata;
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}
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#else
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static struct da9211_pdata *da9211_parse_regulators_dt(
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struct device *dev)
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{
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return ERR_PTR(-ENODEV);
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}
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#endif
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static irqreturn_t da9211_irq_handler(int irq, void *data)
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{
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struct da9211 *chip = data;
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int reg_val, err, ret = IRQ_NONE;
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err = regmap_read(chip->regmap, DA9211_REG_EVENT_B, ®_val);
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if (err < 0)
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goto error_i2c;
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if (reg_val & DA9211_E_OV_CURR_A) {
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regulator_notifier_call_chain(chip->rdev[0],
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REGULATOR_EVENT_OVER_CURRENT, NULL);
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err = regmap_write(chip->regmap, DA9211_REG_EVENT_B,
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DA9211_E_OV_CURR_A);
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if (err < 0)
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goto error_i2c;
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ret = IRQ_HANDLED;
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}
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if (reg_val & DA9211_E_OV_CURR_B) {
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regulator_notifier_call_chain(chip->rdev[1],
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REGULATOR_EVENT_OVER_CURRENT, NULL);
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err = regmap_write(chip->regmap, DA9211_REG_EVENT_B,
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DA9211_E_OV_CURR_B);
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if (err < 0)
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goto error_i2c;
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ret = IRQ_HANDLED;
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}
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return ret;
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error_i2c:
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dev_err(chip->dev, "I2C error : %d\n", err);
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return IRQ_NONE;
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}
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static int da9211_regulator_init(struct da9211 *chip)
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{
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struct regulator_config config = { };
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int i, ret;
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unsigned int data;
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ret = regmap_read(chip->regmap, DA9211_REG_CONFIG_E, &data);
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if (ret < 0) {
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dev_err(chip->dev, "Failed to read CONFIG_E reg: %d\n", ret);
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return ret;
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}
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data &= DA9211_SLAVE_SEL;
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/* If configuration for 1/2 bucks is different between platform data
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* and the register, driver should exit.
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*/
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if (chip->pdata->num_buck == 1 && data == 0x00)
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chip->num_regulator = 1;
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else if (chip->pdata->num_buck == 2 && data != 0x00)
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chip->num_regulator = 2;
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else {
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dev_err(chip->dev, "Configuration is mismatched\n");
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return -EINVAL;
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}
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for (i = 0; i < chip->num_regulator; i++) {
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config.init_data = chip->pdata->init_data[i];
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config.dev = chip->dev;
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config.driver_data = chip;
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config.regmap = chip->regmap;
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config.of_node = chip->pdata->reg_node[i];
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if (gpio_is_valid(chip->pdata->gpio_ren[i])) {
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config.ena_gpio = chip->pdata->gpio_ren[i];
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config.ena_gpio_initialized = true;
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} else {
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config.ena_gpio = -EINVAL;
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config.ena_gpio_initialized = false;
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}
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chip->rdev[i] = devm_regulator_register(chip->dev,
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&da9211_regulators[i], &config);
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if (IS_ERR(chip->rdev[i])) {
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dev_err(chip->dev,
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"Failed to register DA9211 regulator\n");
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return PTR_ERR(chip->rdev[i]);
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}
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if (chip->chip_irq != 0) {
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ret = regmap_update_bits(chip->regmap,
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DA9211_REG_MASK_B, DA9211_M_OV_CURR_A << i, 0);
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if (ret < 0) {
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dev_err(chip->dev,
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"Failed to update mask reg: %d\n", ret);
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return ret;
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}
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}
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}
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return 0;
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}
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/*
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* I2C driver interface functions
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*/
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static int da9211_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct da9211 *chip;
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int error, ret;
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unsigned int data;
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chip = devm_kzalloc(&i2c->dev, sizeof(struct da9211), GFP_KERNEL);
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if (!chip)
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return -ENOMEM;
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chip->dev = &i2c->dev;
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chip->regmap = devm_regmap_init_i2c(i2c, &da9211_regmap_config);
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if (IS_ERR(chip->regmap)) {
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error = PTR_ERR(chip->regmap);
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dev_err(chip->dev, "Failed to allocate register map: %d\n",
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error);
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return error;
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}
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i2c_set_clientdata(i2c, chip);
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chip->pdata = i2c->dev.platform_data;
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ret = regmap_read(chip->regmap, DA9211_REG_DEVICE_ID, &data);
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if (ret < 0) {
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dev_err(chip->dev, "Failed to read DEVICE_ID reg: %d\n", ret);
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return ret;
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}
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switch (data) {
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case DA9211_DEVICE_ID:
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chip->chip_id = DA9211;
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break;
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case DA9213_DEVICE_ID:
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chip->chip_id = DA9213;
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break;
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case DA9215_DEVICE_ID:
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chip->chip_id = DA9215;
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break;
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default:
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dev_err(chip->dev, "Unsupported device id = 0x%x.\n", data);
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return -ENODEV;
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}
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if (!chip->pdata)
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chip->pdata = da9211_parse_regulators_dt(chip->dev);
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if (IS_ERR(chip->pdata)) {
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dev_err(chip->dev, "No regulators defined for the platform\n");
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return PTR_ERR(chip->pdata);
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}
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chip->chip_irq = i2c->irq;
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if (chip->chip_irq != 0) {
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ret = devm_request_threaded_irq(chip->dev, chip->chip_irq, NULL,
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da9211_irq_handler,
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IRQF_TRIGGER_LOW|IRQF_ONESHOT,
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"da9211", chip);
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if (ret != 0) {
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dev_err(chip->dev, "Failed to request IRQ: %d\n",
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chip->chip_irq);
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return ret;
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}
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} else {
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dev_warn(chip->dev, "No IRQ configured\n");
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}
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ret = da9211_regulator_init(chip);
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if (ret < 0)
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dev_err(chip->dev, "Failed to initialize regulator: %d\n", ret);
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return ret;
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}
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static const struct i2c_device_id da9211_i2c_id[] = {
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{"da9211", DA9211},
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{"da9212", DA9212},
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{"da9213", DA9213},
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{"da9223", DA9223},
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{"da9214", DA9214},
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|
{"da9224", DA9224},
|
|
{"da9215", DA9215},
|
|
{"da9225", DA9225},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, da9211_i2c_id);
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id da9211_dt_ids[] = {
|
|
{ .compatible = "dlg,da9211", .data = &da9211_i2c_id[0] },
|
|
{ .compatible = "dlg,da9212", .data = &da9211_i2c_id[1] },
|
|
{ .compatible = "dlg,da9213", .data = &da9211_i2c_id[2] },
|
|
{ .compatible = "dlg,da9223", .data = &da9211_i2c_id[3] },
|
|
{ .compatible = "dlg,da9214", .data = &da9211_i2c_id[4] },
|
|
{ .compatible = "dlg,da9224", .data = &da9211_i2c_id[5] },
|
|
{ .compatible = "dlg,da9215", .data = &da9211_i2c_id[6] },
|
|
{ .compatible = "dlg,da9225", .data = &da9211_i2c_id[7] },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, da9211_dt_ids);
|
|
#endif
|
|
|
|
static struct i2c_driver da9211_regulator_driver = {
|
|
.driver = {
|
|
.name = "da9211",
|
|
.of_match_table = of_match_ptr(da9211_dt_ids),
|
|
},
|
|
.probe = da9211_i2c_probe,
|
|
.id_table = da9211_i2c_id,
|
|
};
|
|
|
|
module_i2c_driver(da9211_regulator_driver);
|
|
|
|
MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
|
|
MODULE_DESCRIPTION("DA9211/DA9212/DA9213/DA9223/DA9214/DA9224/DA9215/DA9225 regulator driver");
|
|
MODULE_LICENSE("GPL");
|