303 lines
6.7 KiB
C
303 lines
6.7 KiB
C
/*
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* Base driver for Marvell 88PM8607
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*
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* Copyright (C) 2009 Marvell International Ltd.
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* Haojian Zhuang <haojian.zhuang@marvell.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/i2c.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/88pm8607.h>
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#define PM8607_REG_RESOURCE(_start, _end) \
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{ \
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.start = PM8607_##_start, \
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.end = PM8607_##_end, \
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.flags = IORESOURCE_IO, \
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}
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static struct resource pm8607_regulator_resources[] = {
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PM8607_REG_RESOURCE(BUCK1, BUCK1),
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PM8607_REG_RESOURCE(BUCK2, BUCK2),
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PM8607_REG_RESOURCE(BUCK3, BUCK3),
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PM8607_REG_RESOURCE(LDO1, LDO1),
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PM8607_REG_RESOURCE(LDO2, LDO2),
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PM8607_REG_RESOURCE(LDO3, LDO3),
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PM8607_REG_RESOURCE(LDO4, LDO4),
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PM8607_REG_RESOURCE(LDO5, LDO5),
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PM8607_REG_RESOURCE(LDO6, LDO6),
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PM8607_REG_RESOURCE(LDO7, LDO7),
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PM8607_REG_RESOURCE(LDO8, LDO8),
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PM8607_REG_RESOURCE(LDO9, LDO9),
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PM8607_REG_RESOURCE(LDO10, LDO10),
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PM8607_REG_RESOURCE(LDO12, LDO12),
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PM8607_REG_RESOURCE(LDO14, LDO14),
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};
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#define PM8607_REG_DEVS(_name, _id) \
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{ \
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.name = "88pm8607-" #_name, \
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.num_resources = 1, \
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.resources = &pm8607_regulator_resources[PM8607_ID_##_id], \
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}
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static struct mfd_cell pm8607_devs[] = {
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PM8607_REG_DEVS(buck1, BUCK1),
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PM8607_REG_DEVS(buck2, BUCK2),
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PM8607_REG_DEVS(buck3, BUCK3),
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PM8607_REG_DEVS(ldo1, LDO1),
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PM8607_REG_DEVS(ldo2, LDO2),
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PM8607_REG_DEVS(ldo3, LDO3),
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PM8607_REG_DEVS(ldo4, LDO4),
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PM8607_REG_DEVS(ldo5, LDO5),
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PM8607_REG_DEVS(ldo6, LDO6),
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PM8607_REG_DEVS(ldo7, LDO7),
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PM8607_REG_DEVS(ldo8, LDO8),
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PM8607_REG_DEVS(ldo9, LDO9),
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PM8607_REG_DEVS(ldo10, LDO10),
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PM8607_REG_DEVS(ldo12, LDO12),
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PM8607_REG_DEVS(ldo14, LDO14),
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};
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static inline int pm8607_read_device(struct pm8607_chip *chip,
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int reg, int bytes, void *dest)
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{
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struct i2c_client *i2c = chip->client;
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unsigned char data;
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int ret;
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data = (unsigned char)reg;
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ret = i2c_master_send(i2c, &data, 1);
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if (ret < 0)
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return ret;
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ret = i2c_master_recv(i2c, dest, bytes);
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if (ret < 0)
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return ret;
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return 0;
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}
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static inline int pm8607_write_device(struct pm8607_chip *chip,
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int reg, int bytes, void *src)
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{
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struct i2c_client *i2c = chip->client;
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unsigned char buf[bytes + 1];
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int ret;
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buf[0] = (unsigned char)reg;
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memcpy(&buf[1], src, bytes);
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ret = i2c_master_send(i2c, buf, bytes + 1);
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if (ret < 0)
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return ret;
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return 0;
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}
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int pm8607_reg_read(struct pm8607_chip *chip, int reg)
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{
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unsigned char data;
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int ret;
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mutex_lock(&chip->io_lock);
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ret = chip->read(chip, reg, 1, &data);
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mutex_unlock(&chip->io_lock);
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if (ret < 0)
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return ret;
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else
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return (int)data;
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}
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EXPORT_SYMBOL(pm8607_reg_read);
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int pm8607_reg_write(struct pm8607_chip *chip, int reg,
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unsigned char data)
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{
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int ret;
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mutex_lock(&chip->io_lock);
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ret = chip->write(chip, reg, 1, &data);
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mutex_unlock(&chip->io_lock);
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return ret;
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}
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EXPORT_SYMBOL(pm8607_reg_write);
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int pm8607_bulk_read(struct pm8607_chip *chip, int reg,
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int count, unsigned char *buf)
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{
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int ret;
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mutex_lock(&chip->io_lock);
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ret = chip->read(chip, reg, count, buf);
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mutex_unlock(&chip->io_lock);
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return ret;
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}
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EXPORT_SYMBOL(pm8607_bulk_read);
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int pm8607_bulk_write(struct pm8607_chip *chip, int reg,
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int count, unsigned char *buf)
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{
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int ret;
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mutex_lock(&chip->io_lock);
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ret = chip->write(chip, reg, count, buf);
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mutex_unlock(&chip->io_lock);
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return ret;
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}
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EXPORT_SYMBOL(pm8607_bulk_write);
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int pm8607_set_bits(struct pm8607_chip *chip, int reg,
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unsigned char mask, unsigned char data)
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{
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unsigned char value;
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int ret;
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mutex_lock(&chip->io_lock);
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ret = chip->read(chip, reg, 1, &value);
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if (ret < 0)
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goto out;
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value &= ~mask;
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value |= data;
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ret = chip->write(chip, reg, 1, &value);
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out:
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mutex_unlock(&chip->io_lock);
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return ret;
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}
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EXPORT_SYMBOL(pm8607_set_bits);
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static const struct i2c_device_id pm8607_id_table[] = {
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{ "88PM8607", 0 },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, pm8607_id_table);
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static int __devinit pm8607_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct pm8607_platform_data *pdata = client->dev.platform_data;
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struct pm8607_chip *chip;
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int i, count;
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int ret;
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chip = kzalloc(sizeof(struct pm8607_chip), GFP_KERNEL);
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if (chip == NULL)
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return -ENOMEM;
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chip->client = client;
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chip->dev = &client->dev;
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chip->read = pm8607_read_device;
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chip->write = pm8607_write_device;
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i2c_set_clientdata(client, chip);
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mutex_init(&chip->io_lock);
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dev_set_drvdata(chip->dev, chip);
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ret = pm8607_reg_read(chip, PM8607_CHIP_ID);
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if (ret < 0) {
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dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
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goto out;
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}
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if ((ret & CHIP_ID_MASK) == CHIP_ID)
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dev_info(chip->dev, "Marvell 88PM8607 (ID: %02x) detected\n",
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ret);
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else {
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dev_err(chip->dev, "Failed to detect Marvell 88PM8607. "
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"Chip ID: %02x\n", ret);
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goto out;
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}
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chip->chip_id = ret;
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ret = pm8607_reg_read(chip, PM8607_BUCK3);
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if (ret < 0) {
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dev_err(chip->dev, "Failed to read BUCK3 register: %d\n", ret);
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goto out;
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}
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if (ret & PM8607_BUCK3_DOUBLE)
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chip->buck3_double = 1;
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ret = pm8607_reg_read(chip, PM8607_MISC1);
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if (ret < 0) {
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dev_err(chip->dev, "Failed to read MISC1 register: %d\n", ret);
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goto out;
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}
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if (pdata->i2c_port == PI2C_PORT)
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ret |= PM8607_MISC1_PI2C;
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else
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ret &= ~PM8607_MISC1_PI2C;
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ret = pm8607_reg_write(chip, PM8607_MISC1, ret);
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if (ret < 0) {
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dev_err(chip->dev, "Failed to write MISC1 register: %d\n", ret);
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goto out;
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}
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count = ARRAY_SIZE(pm8607_devs);
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for (i = 0; i < count; i++) {
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ret = mfd_add_devices(chip->dev, i, &pm8607_devs[i],
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1, NULL, 0);
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if (ret != 0) {
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dev_err(chip->dev, "Failed to add subdevs\n");
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goto out;
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}
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}
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return 0;
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out:
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i2c_set_clientdata(client, NULL);
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kfree(chip);
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return ret;
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}
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static int __devexit pm8607_remove(struct i2c_client *client)
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{
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struct pm8607_chip *chip = i2c_get_clientdata(client);
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mfd_remove_devices(chip->dev);
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kfree(chip);
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return 0;
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}
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static struct i2c_driver pm8607_driver = {
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.driver = {
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.name = "88PM8607",
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.owner = THIS_MODULE,
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},
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.probe = pm8607_probe,
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.remove = __devexit_p(pm8607_remove),
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.id_table = pm8607_id_table,
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};
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static int __init pm8607_init(void)
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{
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int ret;
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ret = i2c_add_driver(&pm8607_driver);
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if (ret != 0)
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pr_err("Failed to register 88PM8607 I2C driver: %d\n", ret);
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return ret;
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}
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subsys_initcall(pm8607_init);
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static void __exit pm8607_exit(void)
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{
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i2c_del_driver(&pm8607_driver);
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}
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module_exit(pm8607_exit);
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MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM8607");
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MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
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MODULE_LICENSE("GPL");
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