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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * LEDs driver for the Cobalt Raq series.
4 *
5 * Copyright (C) 2007 Yoichi Yuasa <yuasa@linux-mips.org>
6 */
7#include <linux/init.h>
8#include <linux/io.h>
9#include <linux/ioport.h>
10#include <linux/leds.h>
11#include <linux/platform_device.h>
12#include <linux/spinlock.h>
13#include <linux/types.h>
14#include <linux/export.h>
15
16#define LED_WEB 0x04
17#define LED_POWER_OFF 0x08
18
19static void __iomem *led_port;
20static u8 led_value;
21static DEFINE_SPINLOCK(led_value_lock);
22
23static void raq_web_led_set(struct led_classdev *led_cdev,
24 enum led_brightness brightness)
25{
26 unsigned long flags;
27
28 spin_lock_irqsave(&led_value_lock, flags);
29
30 if (brightness)
31 led_value |= LED_WEB;
32 else
33 led_value &= ~LED_WEB;
34 writeb(led_value, led_port);
35
36 spin_unlock_irqrestore(&led_value_lock, flags);
37}
38
39static struct led_classdev raq_web_led = {
40 .name = "raq::web",
41 .brightness_set = raq_web_led_set,
42};
43
44static void raq_power_off_led_set(struct led_classdev *led_cdev,
45 enum led_brightness brightness)
46{
47 unsigned long flags;
48
49 spin_lock_irqsave(&led_value_lock, flags);
50
51 if (brightness)
52 led_value |= LED_POWER_OFF;
53 else
54 led_value &= ~LED_POWER_OFF;
55 writeb(led_value, led_port);
56
57 spin_unlock_irqrestore(&led_value_lock, flags);
58}
59
60static struct led_classdev raq_power_off_led = {
61 .name = "raq::power-off",
62 .brightness_set = raq_power_off_led_set,
63 .default_trigger = "power-off",
64};
65
66static int cobalt_raq_led_probe(struct platform_device *pdev)
67{
68 struct resource *res;
69 int retval;
70
71 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
72 if (!res)
73 return -EBUSY;
74
75 led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res));
76 if (!led_port)
77 return -ENOMEM;
78
79 retval = led_classdev_register(&pdev->dev, &raq_power_off_led);
80 if (retval)
81 goto err_null;
82
83 retval = led_classdev_register(&pdev->dev, &raq_web_led);
84 if (retval)
85 goto err_unregister;
86
87 return 0;
88
89err_unregister:
90 led_classdev_unregister(&raq_power_off_led);
91
92err_null:
93 led_port = NULL;
94
95 return retval;
96}
97
98static struct platform_driver cobalt_raq_led_driver = {
99 .probe = cobalt_raq_led_probe,
100 .driver = {
101 .name = "cobalt-raq-leds",
102 },
103};
104
105builtin_platform_driver(cobalt_raq_led_driver);
1/*
2 * LEDs driver for the Cobalt Raq series.
3 *
4 * Copyright (C) 2007 Yoichi Yuasa <yuasa@linux-mips.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20#include <linux/init.h>
21#include <linux/io.h>
22#include <linux/ioport.h>
23#include <linux/leds.h>
24#include <linux/platform_device.h>
25#include <linux/spinlock.h>
26#include <linux/types.h>
27
28#define LED_WEB 0x04
29#define LED_POWER_OFF 0x08
30
31static void __iomem *led_port;
32static u8 led_value;
33static DEFINE_SPINLOCK(led_value_lock);
34
35static void raq_web_led_set(struct led_classdev *led_cdev,
36 enum led_brightness brightness)
37{
38 unsigned long flags;
39
40 spin_lock_irqsave(&led_value_lock, flags);
41
42 if (brightness)
43 led_value |= LED_WEB;
44 else
45 led_value &= ~LED_WEB;
46 writeb(led_value, led_port);
47
48 spin_unlock_irqrestore(&led_value_lock, flags);
49}
50
51static struct led_classdev raq_web_led = {
52 .name = "raq::web",
53 .brightness_set = raq_web_led_set,
54};
55
56static void raq_power_off_led_set(struct led_classdev *led_cdev,
57 enum led_brightness brightness)
58{
59 unsigned long flags;
60
61 spin_lock_irqsave(&led_value_lock, flags);
62
63 if (brightness)
64 led_value |= LED_POWER_OFF;
65 else
66 led_value &= ~LED_POWER_OFF;
67 writeb(led_value, led_port);
68
69 spin_unlock_irqrestore(&led_value_lock, flags);
70}
71
72static struct led_classdev raq_power_off_led = {
73 .name = "raq::power-off",
74 .brightness_set = raq_power_off_led_set,
75 .default_trigger = "power-off",
76};
77
78static int __devinit cobalt_raq_led_probe(struct platform_device *pdev)
79{
80 struct resource *res;
81 int retval;
82
83 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
84 if (!res)
85 return -EBUSY;
86
87 led_port = ioremap(res->start, resource_size(res));
88 if (!led_port)
89 return -ENOMEM;
90
91 retval = led_classdev_register(&pdev->dev, &raq_power_off_led);
92 if (retval)
93 goto err_iounmap;
94
95 retval = led_classdev_register(&pdev->dev, &raq_web_led);
96 if (retval)
97 goto err_unregister;
98
99 return 0;
100
101err_unregister:
102 led_classdev_unregister(&raq_power_off_led);
103
104err_iounmap:
105 iounmap(led_port);
106 led_port = NULL;
107
108 return retval;
109}
110
111static int __devexit cobalt_raq_led_remove(struct platform_device *pdev)
112{
113 led_classdev_unregister(&raq_power_off_led);
114 led_classdev_unregister(&raq_web_led);
115
116 if (led_port) {
117 iounmap(led_port);
118 led_port = NULL;
119 }
120
121 return 0;
122}
123
124static struct platform_driver cobalt_raq_led_driver = {
125 .probe = cobalt_raq_led_probe,
126 .remove = __devexit_p(cobalt_raq_led_remove),
127 .driver = {
128 .name = "cobalt-raq-leds",
129 .owner = THIS_MODULE,
130 },
131};
132
133static int __init cobalt_raq_led_init(void)
134{
135 return platform_driver_register(&cobalt_raq_led_driver);
136}
137
138module_init(cobalt_raq_led_init);