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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/*
* leds-max77660.c -- MAXIM MAX77660 led driver.
*
* Copyright (c) 2013, NVIDIA Corporation.
*
* Author: Laxman Dewangan <ldewangan@nvidia.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 version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
* whether express or implied; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307, USA
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/mfd/max77660/max77660-core.h>
struct max77660_leds {
struct device *dev;
struct device *parent;
};
static int max77660_disable_leds(struct max77660_leds *leds)
{
int ret;
/* Disable LED driver by default */
ret = max77660_reg_write(leds->parent, MAX77660_PWR_SLAVE,
MAX77660_REG_LEDEN, 0x80);
if (ret < 0) {
dev_err(leds->dev, "LED write failed: %d\n", ret);
return ret;
}
ret = max77660_reg_write(leds->parent, MAX77660_PWR_SLAVE,
MAX77660_REG_LEDBLNK, 0x0);
if (ret < 0) {
dev_err(leds->dev, "LEDBLNK write failed: %d\n", ret);
return ret;
}
return 0;
}
static int max77660_leds_probe(struct platform_device *pdev)
{
struct max77660_leds *leds;
struct max77660_platform_data *pdata;
int ret = 0;
pdata = dev_get_platdata(pdev->dev.parent);
if (!pdata) {
dev_err(&pdev->dev, "No Platform data\n");
return -EINVAL;
}
leds = devm_kzalloc(&pdev->dev, sizeof(*leds), GFP_KERNEL);
if (!leds) {
dev_err(&pdev->dev, "Memory allocation failed for leds\n");
return -ENOMEM;
}
leds->dev = &pdev->dev;
leds->parent = pdev->dev.parent;
dev_set_drvdata(&pdev->dev, leds);
if (pdata->led_disable)
ret = max77660_disable_leds(leds);
return ret;
}
static struct platform_driver max77660_leds_driver = {
.probe = max77660_leds_probe,
.driver = {
.name = "max77660-leds",
.owner = THIS_MODULE,
},
};
module_platform_driver(max77660_leds_driver);
MODULE_DESCRIPTION("max77660 LEDs driver");
MODULE_AUTHOR("Laxman Dewangan<ldewangan@nvidia.com>");
MODULE_ALIAS("platform:max77660-leds");
MODULE_LICENSE("GPL v2");
|
