ixp4xx: fix lzma/jffs2 config options
[openwrt.git] / target / linux / ixp4xx / patches-2.6.33 / 295-latch_led_driver.patch
1 --- a/drivers/leds/Kconfig
2 +++ b/drivers/leds/Kconfig
3 @@ -157,6 +157,13 @@ config LEDS_LP3944
4 To compile this driver as a module, choose M here: the
5 module will be called leds-lp3944.
6
7 +config LEDS_LATCH
8 + tristate "LED Support for Memory Latched LEDs"
9 + depends on LEDS_CLASS
10 + help
11 + -- To Do --
12 +
13 +
14 config LEDS_CLEVO_MAIL
15 tristate "Mail LED on Clevo notebook"
16 depends on LEDS_CLASS && X86 && SERIO_I8042 && DMI
17 --- /dev/null
18 +++ b/drivers/leds/leds-latch.c
19 @@ -0,0 +1,149 @@
20 +/*
21 + * LEDs driver for Memory Latched Devices
22 + *
23 + * Copyright (C) 2008 Gateworks Corp.
24 + * Chris Lang <clang@gateworks.com>
25 + *
26 + * This program is free software; you can redistribute it and/or modify
27 + * it under the terms of the GNU General Public License version 2 as
28 + * published by the Free Software Foundation.
29 + *
30 + */
31 +#include <linux/kernel.h>
32 +#include <linux/init.h>
33 +#include <linux/platform_device.h>
34 +#include <linux/leds.h>
35 +#include <linux/workqueue.h>
36 +#include <asm/io.h>
37 +#include <linux/spinlock.h>
38 +
39 +static unsigned int mem_keep = 0xFF;
40 +static spinlock_t mem_lock;
41 +static unsigned char *iobase;
42 +
43 +struct latch_led_data {
44 + struct led_classdev cdev;
45 + struct work_struct work;
46 + u8 new_level;
47 + u8 bit;
48 + void (*set_led)(u8 bit, enum led_brightness value);
49 +};
50 +
51 +static void latch_set_led(u8 bit, enum led_brightness value)
52 +{
53 + if (value == LED_OFF)
54 + mem_keep |= (0x1 << bit);
55 + else
56 + mem_keep &= ~(0x1 << bit);
57 +
58 + writeb(mem_keep, iobase);
59 +}
60 +
61 +static void latch_led_set(struct led_classdev *led_cdev,
62 + enum led_brightness value)
63 +{
64 + struct latch_led_data *led_dat =
65 + container_of(led_cdev, struct latch_led_data, cdev);
66 +
67 + raw_spin_lock(mem_lock);
68 +
69 + led_dat->set_led(led_dat->bit, value);
70 +
71 + raw_spin_unlock(mem_lock);
72 +}
73 +
74 +static int latch_led_probe(struct platform_device *pdev)
75 +{
76 + struct latch_led_platform_data *pdata = pdev->dev.platform_data;
77 + struct latch_led *cur_led;
78 + struct latch_led_data *leds_data, *led_dat;
79 + int i, ret = 0;
80 +
81 + if (!pdata)
82 + return -EBUSY;
83 +
84 + leds_data = kzalloc(sizeof(struct latch_led_data) * pdata->num_leds,
85 + GFP_KERNEL);
86 + if (!leds_data)
87 + return -ENOMEM;
88 +
89 + for (i = 0; i < pdata->num_leds; i++) {
90 + cur_led = &pdata->leds[i];
91 + led_dat = &leds_data[i];
92 +
93 + led_dat->cdev.name = cur_led->name;
94 + led_dat->cdev.default_trigger = cur_led->default_trigger;
95 + led_dat->cdev.brightness_set = latch_led_set;
96 + led_dat->cdev.brightness = LED_OFF;
97 + led_dat->bit = cur_led->bit;
98 + led_dat->set_led = pdata->set_led ? pdata->set_led : latch_set_led;
99 +
100 + ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
101 + if (ret < 0) {
102 + goto err;
103 + }
104 + }
105 +
106 + if (!pdata->set_led) {
107 + iobase = ioremap_nocache(pdata->mem, 0x1000);
108 + writeb(0xFF, iobase);
109 + }
110 + platform_set_drvdata(pdev, leds_data);
111 +
112 + return 0;
113 +
114 +err:
115 + if (i > 0) {
116 + for (i = i - 1; i >= 0; i--) {
117 + led_classdev_unregister(&leds_data[i].cdev);
118 + }
119 + }
120 +
121 + kfree(leds_data);
122 +
123 + return ret;
124 +}
125 +
126 +static int __devexit latch_led_remove(struct platform_device *pdev)
127 +{
128 + int i;
129 + struct latch_led_platform_data *pdata = pdev->dev.platform_data;
130 + struct latch_led_data *leds_data;
131 +
132 + leds_data = platform_get_drvdata(pdev);
133 +
134 + for (i = 0; i < pdata->num_leds; i++) {
135 + led_classdev_unregister(&leds_data[i].cdev);
136 + cancel_work_sync(&leds_data[i].work);
137 + }
138 +
139 + kfree(leds_data);
140 +
141 + return 0;
142 +}
143 +
144 +static struct platform_driver latch_led_driver = {
145 + .probe = latch_led_probe,
146 + .remove = __devexit_p(latch_led_remove),
147 + .driver = {
148 + .name = "leds-latch",
149 + .owner = THIS_MODULE,
150 + },
151 +};
152 +
153 +static int __init latch_led_init(void)
154 +{
155 + return platform_driver_register(&latch_led_driver);
156 +}
157 +
158 +static void __exit latch_led_exit(void)
159 +{
160 + platform_driver_unregister(&latch_led_driver);
161 +}
162 +
163 +module_init(latch_led_init);
164 +module_exit(latch_led_exit);
165 +
166 +MODULE_AUTHOR("Chris Lang <clang@gateworks.com>");
167 +MODULE_DESCRIPTION("Latch LED driver");
168 +MODULE_LICENSE("GPL");
169 --- a/drivers/leds/Makefile
170 +++ b/drivers/leds/Makefile
171 @@ -20,6 +20,7 @@ obj-$(CONFIG_LEDS_COBALT_RAQ) += leds-c
172 obj-$(CONFIG_LEDS_SUNFIRE) += leds-sunfire.o
173 obj-$(CONFIG_LEDS_PCA9532) += leds-pca9532.o
174 obj-$(CONFIG_LEDS_GPIO) += leds-gpio.o
175 +obj-$(CONFIG_LEDS_LATCH) += leds-latch.o
176 obj-$(CONFIG_LEDS_LP3944) += leds-lp3944.o
177 obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o
178 obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o
179 --- a/include/linux/leds.h
180 +++ b/include/linux/leds.h
181 @@ -161,5 +161,19 @@ struct gpio_led_platform_data {
182 unsigned long *delay_off);
183 };
184
185 +/* For the leds-latch driver */
186 +struct latch_led {
187 + const char *name;
188 + char *default_trigger;
189 + unsigned bit;
190 +};
191 +
192 +struct latch_led_platform_data {
193 + int num_leds;
194 + u32 mem;
195 + struct latch_led *leds;
196 + void (*set_led)(u8 bit, enum led_brightness value);
197 +};
198 +
199
200 #endif /* __LINUX_LEDS_H_INCLUDED */
This page took 0.053344 seconds and 5 git commands to generate.