add a patch to export dma_set_coherent_mask
[openwrt/staging/chunkeey.git] / target / linux / ixp4xx / patches-2.6.34 / 295-latch_led_driver.patch
1 --- a/drivers/leds/Kconfig
2 +++ b/drivers/leds/Kconfig
3 @@ -166,6 +166,13 @@ 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 X86 && SERIO_I8042 && DMI
17 --- /dev/null
18 +++ b/drivers/leds/leds-latch.c
19 @@ -0,0 +1,150 @@
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 +#include <linux/slab.h>
39 +
40 +static unsigned int mem_keep = 0xFF;
41 +static spinlock_t mem_lock;
42 +static unsigned char *iobase;
43 +
44 +struct latch_led_data {
45 + struct led_classdev cdev;
46 + struct work_struct work;
47 + u8 new_level;
48 + u8 bit;
49 + void (*set_led)(u8 bit, enum led_brightness value);
50 +};
51 +
52 +static void latch_set_led(u8 bit, enum led_brightness value)
53 +{
54 + if (value == LED_OFF)
55 + mem_keep |= (0x1 << bit);
56 + else
57 + mem_keep &= ~(0x1 << bit);
58 +
59 + writeb(mem_keep, iobase);
60 +}
61 +
62 +static void latch_led_set(struct led_classdev *led_cdev,
63 + enum led_brightness value)
64 +{
65 + struct latch_led_data *led_dat =
66 + container_of(led_cdev, struct latch_led_data, cdev);
67 +
68 + raw_spin_lock(mem_lock);
69 +
70 + led_dat->set_led(led_dat->bit, value);
71 +
72 + raw_spin_unlock(mem_lock);
73 +}
74 +
75 +static int latch_led_probe(struct platform_device *pdev)
76 +{
77 + struct latch_led_platform_data *pdata = pdev->dev.platform_data;
78 + struct latch_led *cur_led;
79 + struct latch_led_data *leds_data, *led_dat;
80 + int i, ret = 0;
81 +
82 + if (!pdata)
83 + return -EBUSY;
84 +
85 + leds_data = kzalloc(sizeof(struct latch_led_data) * pdata->num_leds,
86 + GFP_KERNEL);
87 + if (!leds_data)
88 + return -ENOMEM;
89 +
90 + for (i = 0; i < pdata->num_leds; i++) {
91 + cur_led = &pdata->leds[i];
92 + led_dat = &leds_data[i];
93 +
94 + led_dat->cdev.name = cur_led->name;
95 + led_dat->cdev.default_trigger = cur_led->default_trigger;
96 + led_dat->cdev.brightness_set = latch_led_set;
97 + led_dat->cdev.brightness = LED_OFF;
98 + led_dat->bit = cur_led->bit;
99 + led_dat->set_led = pdata->set_led ? pdata->set_led : latch_set_led;
100 +
101 + ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
102 + if (ret < 0) {
103 + goto err;
104 + }
105 + }
106 +
107 + if (!pdata->set_led) {
108 + iobase = ioremap_nocache(pdata->mem, 0x1000);
109 + writeb(0xFF, iobase);
110 + }
111 + platform_set_drvdata(pdev, leds_data);
112 +
113 + return 0;
114 +
115 +err:
116 + if (i > 0) {
117 + for (i = i - 1; i >= 0; i--) {
118 + led_classdev_unregister(&leds_data[i].cdev);
119 + }
120 + }
121 +
122 + kfree(leds_data);
123 +
124 + return ret;
125 +}
126 +
127 +static int __devexit latch_led_remove(struct platform_device *pdev)
128 +{
129 + int i;
130 + struct latch_led_platform_data *pdata = pdev->dev.platform_data;
131 + struct latch_led_data *leds_data;
132 +
133 + leds_data = platform_get_drvdata(pdev);
134 +
135 + for (i = 0; i < pdata->num_leds; i++) {
136 + led_classdev_unregister(&leds_data[i].cdev);
137 + cancel_work_sync(&leds_data[i].work);
138 + }
139 +
140 + kfree(leds_data);
141 +
142 + return 0;
143 +}
144 +
145 +static struct platform_driver latch_led_driver = {
146 + .probe = latch_led_probe,
147 + .remove = __devexit_p(latch_led_remove),
148 + .driver = {
149 + .name = "leds-latch",
150 + .owner = THIS_MODULE,
151 + },
152 +};
153 +
154 +static int __init latch_led_init(void)
155 +{
156 + return platform_driver_register(&latch_led_driver);
157 +}
158 +
159 +static void __exit latch_led_exit(void)
160 +{
161 + platform_driver_unregister(&latch_led_driver);
162 +}
163 +
164 +module_init(latch_led_init);
165 +module_exit(latch_led_exit);
166 +
167 +MODULE_AUTHOR("Chris Lang <clang@gateworks.com>");
168 +MODULE_DESCRIPTION("Latch LED driver");
169 +MODULE_LICENSE("GPL");
170 --- a/drivers/leds/Makefile
171 +++ b/drivers/leds/Makefile
172 @@ -21,6 +21,7 @@ obj-$(CONFIG_LEDS_COBALT_RAQ) += leds-c
173 obj-$(CONFIG_LEDS_SUNFIRE) += leds-sunfire.o
174 obj-$(CONFIG_LEDS_PCA9532) += leds-pca9532.o
175 obj-$(CONFIG_LEDS_GPIO) += leds-gpio.o
176 +obj-$(CONFIG_LEDS_LATCH) += leds-latch.o
177 obj-$(CONFIG_LEDS_LP3944) += leds-lp3944.o
178 obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o
179 obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o
180 --- a/include/linux/leds.h
181 +++ b/include/linux/leds.h
182 @@ -161,5 +161,19 @@ struct gpio_led_platform_data {
183 unsigned long *delay_off);
184 };
185
186 +/* For the leds-latch driver */
187 +struct latch_led {
188 + const char *name;
189 + char *default_trigger;
190 + unsigned bit;
191 +};
192 +
193 +struct latch_led_platform_data {
194 + int num_leds;
195 + u32 mem;
196 + struct latch_led *leds;
197 + void (*set_led)(u8 bit, enum led_brightness value);
198 +};
199 +
200
201 #endif /* __LINUX_LEDS_H_INCLUDED */