forked from luck/tmp_suning_uos_patched
66002163f0
Use devm_of_platform_populate() to be sure that of_platform_depopulate is called when removing the driver. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/*
|
|
* TI SMSC MFD Driver
|
|
*
|
|
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
|
|
*
|
|
* Author: Sourav Poddar <sourav.poddar@ti.com>
|
|
*
|
|
* 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; GPL v2.
|
|
*
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/err.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/smsc.h>
|
|
#include <linux/of_platform.h>
|
|
|
|
static const struct regmap_config smsc_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.max_register = SMSC_VEN_ID_H,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
};
|
|
|
|
static int smsc_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct smsc *smsc;
|
|
int devid, rev, venid_l, venid_h;
|
|
int ret;
|
|
|
|
smsc = devm_kzalloc(&i2c->dev, sizeof(struct smsc),
|
|
GFP_KERNEL);
|
|
if (!smsc) {
|
|
dev_err(&i2c->dev, "smsc mfd driver memory allocation failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
smsc->regmap = devm_regmap_init_i2c(i2c, &smsc_regmap_config);
|
|
if (IS_ERR(smsc->regmap))
|
|
return PTR_ERR(smsc->regmap);
|
|
|
|
i2c_set_clientdata(i2c, smsc);
|
|
smsc->dev = &i2c->dev;
|
|
|
|
#ifdef CONFIG_OF
|
|
of_property_read_u32(i2c->dev.of_node, "clock", &smsc->clk);
|
|
#endif
|
|
|
|
regmap_read(smsc->regmap, SMSC_DEV_ID, &devid);
|
|
regmap_read(smsc->regmap, SMSC_DEV_REV, &rev);
|
|
regmap_read(smsc->regmap, SMSC_VEN_ID_L, &venid_l);
|
|
regmap_read(smsc->regmap, SMSC_VEN_ID_H, &venid_h);
|
|
|
|
dev_info(&i2c->dev, "SMSCxxx devid: %02x rev: %02x venid: %02x\n",
|
|
devid, rev, (venid_h << 8) | venid_l);
|
|
|
|
ret = regmap_write(smsc->regmap, SMSC_CLK_CTRL, smsc->clk);
|
|
if (ret)
|
|
return ret;
|
|
|
|
#ifdef CONFIG_OF
|
|
if (i2c->dev.of_node)
|
|
ret = devm_of_platform_populate(&i2c->dev);
|
|
#endif
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct i2c_device_id smsc_i2c_id[] = {
|
|
{ "smscece1099", 0},
|
|
{},
|
|
};
|
|
|
|
static struct i2c_driver smsc_i2c_driver = {
|
|
.driver = {
|
|
.name = "smsc",
|
|
},
|
|
.probe = smsc_i2c_probe,
|
|
.id_table = smsc_i2c_id,
|
|
};
|
|
builtin_i2c_driver(smsc_i2c_driver);
|