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/*
* Copyright (C) 2017 Sascha Hauer, Pengutronix
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*
*/
#include <common.h>
#include <init.h>
#include <driver.h>
#include <xfuncs.h>
#include <errno.h>
#include <malloc.h>
#include <of.h>
#include <regmap.h>
#include <mfd/pfuze.h>
#include <i2c/i2c.h>
#define DRIVERNAME "pfuze"
#define MC13XXX_NUMREGS 0x3f
struct pfuze {
struct device_d *dev;
struct regmap *map;
struct i2c_client *client;
int revision;
};
struct pfuze_devtype {
int (*revision)(struct pfuze*);
};
#define to_pfuze(a) container_of(a, struct pfuze, cdev)
static struct pfuze *pfuze_dev;
static void(*pfuze_init_callback)(struct regmap *map);
int pfuze_register_init_callback(void(*callback)(struct regmap *map))
{
if (pfuze_init_callback)
return -EBUSY;
pfuze_init_callback = callback;
if (pfuze_dev)
pfuze_init_callback(pfuze_dev->map);
return 0;
}
static int pfuze_i2c_reg_read(void *ctx, unsigned int reg, unsigned int *val)
{
struct pfuze *pfuze = ctx;
u8 buf[1];
int ret;
ret = i2c_read_reg(pfuze->client, reg, buf, 1);
*val = buf[0];
return ret == 1 ? 0 : ret;
}
static int pfuze_i2c_reg_write(void *ctx, unsigned int reg, unsigned int val)
{
struct pfuze *pfuze = ctx;
u8 buf[] = {
val & 0xff,
};
int ret;
ret = i2c_write_reg(pfuze->client, reg, buf, 1);
return ret == 1 ? 0 : ret;
}
static struct regmap_bus regmap_pfuze_i2c_bus = {
.reg_write = pfuze_i2c_reg_write,
.reg_read = pfuze_i2c_reg_read,
};
static const struct regmap_config pfuze_regmap_i2c_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 127,
};
static int __init pfuze_probe(struct device_d *dev)
{
struct pfuze_devtype *devtype;
int ret;
if (pfuze_dev)
return -EBUSY;
ret = dev_get_drvdata(dev, (const void **)&devtype);
if (ret)
return ret;
pfuze_dev = xzalloc(sizeof(*pfuze_dev));
pfuze_dev->dev = dev;
pfuze_dev->client = to_i2c_client(dev);
pfuze_dev->map = regmap_init(dev, ®map_pfuze_i2c_bus,
pfuze_dev, &pfuze_regmap_i2c_config);
ret = regmap_register_cdev(pfuze_dev->map, NULL);
if (ret)
return ret;
if (pfuze_init_callback)
pfuze_init_callback(pfuze_dev->map);
return 0;
}
static struct pfuze_devtype pfuze100_devtype = {
};
static struct pfuze_devtype pfuze200_devtype = {
};
static struct pfuze_devtype pfuze3000_devtype = {
};
static struct platform_device_id pfuze_ids[] = {
{ .name = "pfuze100", .driver_data = (ulong)&pfuze100_devtype, },
{ .name = "pfuze200", .driver_data = (ulong)&pfuze200_devtype, },
{ .name = "pfuze3000", .driver_data = (ulong)&pfuze3000_devtype, },
{ }
};
static __maybe_unused struct of_device_id pfuze_dt_ids[] = {
{ .compatible = "fsl,pfuze100", .data = &pfuze100_devtype, },
{ .compatible = "fsl,pfuze200", .data = &pfuze200_devtype, },
{ .compatible = "fsl,pfuze3000", .data = &pfuze3000_devtype, },
{ }
};
static struct driver_d pfuze_i2c_driver = {
.name = "pfuze-i2c",
.probe = pfuze_probe,
.id_table = pfuze_ids,
.of_compatible = DRV_OF_COMPAT(pfuze_dt_ids),
};
static int __init pfuze_init(void)
{
int ret;
ret = i2c_driver_register(&pfuze_i2c_driver);
if (ret)
return ret;
return 0;
}
late_initcall(pfuze_init);
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