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/*
* TI LP8788 MFD - core interface
*
* Copyright 2012 Texas Instruments
*
* Author: Milo(Woogyom) Kim <milo.kim@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/lp8788.h>
#include <linux/module.h>
#include <linux/slab.h>
#define MAX_LP8788_REGISTERS 0xA2
#define MFD_DEV_SIMPLE(_name) \
{ \
.name = LP8788_DEV_##_name, \
}
#define MFD_DEV_WITH_ID(_name, _id) \
{ \
.name = LP8788_DEV_##_name, \
.id = _id, \
}
#define MFD_DEV_WITH_RESOURCE(_name, _resource, num_resource) \
{ \
.name = LP8788_DEV_##_name, \
.resources = _resource, \
.num_resources = num_resource, \
}
static struct resource chg_irqs[] = {
/* Charger Interrupts */
{
.start = LP8788_INT_CHG_INPUT_STATE,
.end = LP8788_INT_PRECHG_TIMEOUT,
.name = LP8788_CHG_IRQ,
.flags = IORESOURCE_IRQ,
},
/* Power Routing Switch Interrupts */
{
.start = LP8788_INT_ENTER_SYS_SUPPORT,
.end = LP8788_INT_EXIT_SYS_SUPPORT,
.name = LP8788_PRSW_IRQ,
.flags = IORESOURCE_IRQ,
},
/* Battery Interrupts */
{
.start = LP8788_INT_BATT_LOW,
.end = LP8788_INT_NO_BATT,
.name = LP8788_BATT_IRQ,
.flags = IORESOURCE_IRQ,
},
};
static struct resource rtc_irqs[] = {
{
.start = LP8788_INT_RTC_ALARM1,
.end = LP8788_INT_RTC_ALARM2,
.name = LP8788_ALM_IRQ,
.flags = IORESOURCE_IRQ,
},
};
static struct mfd_cell lp8788_devs[] = {
/* 4 bucks */
MFD_DEV_WITH_ID(BUCK, 1),
MFD_DEV_WITH_ID(BUCK, 2),
MFD_DEV_WITH_ID(BUCK, 3),
MFD_DEV_WITH_ID(BUCK, 4),
/* 12 digital ldos */
MFD_DEV_WITH_ID(DLDO, 1),
MFD_DEV_WITH_ID(DLDO, 2),
MFD_DEV_WITH_ID(DLDO, 3),
MFD_DEV_WITH_ID(DLDO, 4),
MFD_DEV_WITH_ID(DLDO, 5),
MFD_DEV_WITH_ID(DLDO, 6),
MFD_DEV_WITH_ID(DLDO, 7),
MFD_DEV_WITH_ID(DLDO, 8),
MFD_DEV_WITH_ID(DLDO, 9),
MFD_DEV_WITH_ID(DLDO, 10),
MFD_DEV_WITH_ID(DLDO, 11),
MFD_DEV_WITH_ID(DLDO, 12),
/* 10 analog ldos */
MFD_DEV_WITH_ID(ALDO, 1),
MFD_DEV_WITH_ID(ALDO, 2),
MFD_DEV_WITH_ID(ALDO, 3),
MFD_DEV_WITH_ID(ALDO, 4),
MFD_DEV_WITH_ID(ALDO, 5),
MFD_DEV_WITH_ID(ALDO, 6),
MFD_DEV_WITH_ID(ALDO, 7),
MFD_DEV_WITH_ID(ALDO, 8),
MFD_DEV_WITH_ID(ALDO, 9),
MFD_DEV_WITH_ID(ALDO, 10),
/* ADC */
MFD_DEV_SIMPLE(ADC),
/* battery charger */
MFD_DEV_WITH_RESOURCE(CHARGER, chg_irqs, ARRAY_SIZE(chg_irqs)),
/* rtc */
MFD_DEV_WITH_RESOURCE(RTC, rtc_irqs, ARRAY_SIZE(rtc_irqs)),
/* backlight */
MFD_DEV_SIMPLE(BACKLIGHT),
/* current sink for vibrator */
MFD_DEV_SIMPLE(VIBRATOR),
/* current sink for keypad LED */
MFD_DEV_SIMPLE(KEYLED),
};
int lp8788_read_byte(struct lp8788 *lp, u8 reg, u8 *data)
{
int ret;
unsigned int val;
ret = regmap_read(lp->regmap, reg, &val);
if (ret < 0) {
dev_err(lp->dev, "failed to read 0x%.2x\n", reg);
return ret;
}
*data = (u8)val;
return 0;
}
EXPORT_SYMBOL_GPL(lp8788_read_byte);
int lp8788_read_multi_bytes(struct lp8788 *lp, u8 reg, u8 *data, size_t count)
{
return regmap_bulk_read(lp->regmap, reg, data, count);
}
EXPORT_SYMBOL_GPL(lp8788_read_multi_bytes);
int lp8788_write_byte(struct lp8788 *lp, u8 reg, u8 data)
{
return regmap_write(lp->regmap, reg, data);
}
EXPORT_SYMBOL_GPL(lp8788_write_byte);
int lp8788_update_bits(struct lp8788 *lp, u8 reg, u8 mask, u8 data)
{
return regmap_update_bits(lp->regmap, reg, mask, data);
}
EXPORT_SYMBOL_GPL(lp8788_update_bits);
static int lp8788_platform_init(struct lp8788 *lp)
{
struct lp8788_platform_data *pdata = lp->pdata;
return (pdata && pdata->init_func) ? pdata->init_func(lp) : 0;
}
static const struct regmap_config lp8788_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX_LP8788_REGISTERS,
};
static int lp8788_probe(struct i2c_client *cl, const struct i2c_device_id *id)
{
struct lp8788 *lp;
struct lp8788_platform_data *pdata = dev_get_platdata(&cl->dev);
int ret;
lp = devm_kzalloc(&cl->dev, sizeof(struct lp8788), GFP_KERNEL);
if (!lp)
return -ENOMEM;
lp->regmap = devm_regmap_init_i2c(cl, &lp8788_regmap_config);
if (IS_ERR(lp->regmap)) {
ret = PTR_ERR(lp->regmap);
dev_err(&cl->dev, "regmap init i2c err: %d\n", ret);
return ret;
}
lp->pdata = pdata;
lp->dev = &cl->dev;
i2c_set_clientdata(cl, lp);
ret = lp8788_platform_init(lp);
if (ret)
return ret;
ret = lp8788_irq_init(lp, cl->irq);
if (ret)
return ret;
return mfd_add_devices(lp->dev, -1, lp8788_devs,
ARRAY_SIZE(lp8788_devs), NULL, 0, NULL);
}
static int lp8788_remove(struct i2c_client *cl)
{
struct lp8788 *lp = i2c_get_clientdata(cl);
mfd_remove_devices(lp->dev);
lp8788_irq_exit(lp);
return 0;
}
static const struct i2c_device_id lp8788_ids[] = {
{"lp8788", 0},
{ }
};
MODULE_DEVICE_TABLE(i2c, lp8788_ids);
static struct i2c_driver lp8788_driver = {
.driver = {
.name = "lp8788",
.owner = THIS_MODULE,
},
.probe = lp8788_probe,
.remove = lp8788_remove,
.id_table = lp8788_ids,
};
static int __init lp8788_init(void)
{
return i2c_add_driver(&lp8788_driver);
}
subsys_initcall(lp8788_init);
static void __exit lp8788_exit(void)
{
i2c_del_driver(&lp8788_driver);
}
module_exit(lp8788_exit);
MODULE_DESCRIPTION("TI LP8788 MFD Driver");
MODULE_AUTHOR("Milo Kim");
MODULE_LICENSE("GPL");
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