1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2019 Ahmad Fatoum, Pengutronix
*/
#include <common.h>
#include <driver.h>
#include <errno.h>
#include <i2c/i2c.h>
#include <init.h>
#include <of.h>
#include <linux/regmap.h>
#include <linux/mfd/stpmic1.h>
static const struct regmap_config stpmic1_regmap_i2c_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xB3,
};
static int __init stpmic1_probe(struct device *dev)
{
struct regmap *regmap;
u32 reg;
int ret;
regmap = regmap_init_i2c(to_i2c_client(dev), &stpmic1_regmap_i2c_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
ret = regmap_register_cdev(regmap, NULL);
if (ret)
return ret;
ret = regmap_read(regmap, VERSION_SR, ®);
if (ret) {
dev_err(dev, "Unable to read PMIC version\n");
return ret;
}
dev_info(dev, "PMIC Chip Version: 0x%x\n", reg);
return of_platform_populate(dev->of_node, NULL, dev);
}
static __maybe_unused struct of_device_id stpmic1_dt_ids[] = {
{ .compatible = "st,stpmic1" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, stpmic1_dt_ids);
static struct driver stpmic1_i2c_driver = {
.name = "stpmic1-i2c",
.probe = stpmic1_probe,
.of_compatible = DRV_OF_COMPAT(stpmic1_dt_ids),
};
coredevice_i2c_driver(stpmic1_i2c_driver);
|
