backlight.c (97eb3f24352ec6632c2127b35d8087d2a809a9b9) backlight.c (bb7ca747f8d6243b3943c5b133048652020f4a50)
1/*
2 * Backlight Lowlevel Control Abstraction
3 *
4 * Copyright (C) 2003,2004 Hewlett-Packard Company
5 *
6 */
7
8#include <linux/module.h>

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14#include <linux/err.h>
15#include <linux/fb.h>
16#include <linux/slab.h>
17
18#ifdef CONFIG_PMAC_BACKLIGHT
19#include <asm/backlight.h>
20#endif
21
1/*
2 * Backlight Lowlevel Control Abstraction
3 *
4 * Copyright (C) 2003,2004 Hewlett-Packard Company
5 *
6 */
7
8#include <linux/module.h>

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14#include <linux/err.h>
15#include <linux/fb.h>
16#include <linux/slab.h>
17
18#ifdef CONFIG_PMAC_BACKLIGHT
19#include <asm/backlight.h>
20#endif
21
22static const char const *backlight_types[] = {
23 [BACKLIGHT_RAW] = "raw",
24 [BACKLIGHT_PLATFORM] = "platform",
25 [BACKLIGHT_FIRMWARE] = "firmware",
26};
27
22#if defined(CONFIG_FB) || (defined(CONFIG_FB_MODULE) && \
23 defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE))
24/* This callback gets called when something important happens inside a
25 * framebuffer driver. We're looking if that important event is blanking,
26 * and if it is, we're switching backlight power as well ...
27 */
28static int fb_notifier_callback(struct notifier_block *self,
29 unsigned long event, void *data)

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164 }
165 mutex_unlock(&bd->ops_lock);
166
167 backlight_generate_event(bd, BACKLIGHT_UPDATE_SYSFS);
168
169 return rc;
170}
171
28#if defined(CONFIG_FB) || (defined(CONFIG_FB_MODULE) && \
29 defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE))
30/* This callback gets called when something important happens inside a
31 * framebuffer driver. We're looking if that important event is blanking,
32 * and if it is, we're switching backlight power as well ...
33 */
34static int fb_notifier_callback(struct notifier_block *self,
35 unsigned long event, void *data)

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170 }
171 mutex_unlock(&bd->ops_lock);
172
173 backlight_generate_event(bd, BACKLIGHT_UPDATE_SYSFS);
174
175 return rc;
176}
177
178static ssize_t backlight_show_type(struct device *dev,
179 struct device_attribute *attr, char *buf)
180{
181 struct backlight_device *bd = to_backlight_device(dev);
182
183 return sprintf(buf, "%s\n", backlight_types[bd->props.type]);
184}
185
172static ssize_t backlight_show_max_brightness(struct device *dev,
173 struct device_attribute *attr, char *buf)
174{
175 struct backlight_device *bd = to_backlight_device(dev);
176
177 return sprintf(buf, "%d\n", bd->props.max_brightness);
178}
179

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229
230static struct device_attribute bl_device_attributes[] = {
231 __ATTR(bl_power, 0644, backlight_show_power, backlight_store_power),
232 __ATTR(brightness, 0644, backlight_show_brightness,
233 backlight_store_brightness),
234 __ATTR(actual_brightness, 0444, backlight_show_actual_brightness,
235 NULL),
236 __ATTR(max_brightness, 0444, backlight_show_max_brightness, NULL),
186static ssize_t backlight_show_max_brightness(struct device *dev,
187 struct device_attribute *attr, char *buf)
188{
189 struct backlight_device *bd = to_backlight_device(dev);
190
191 return sprintf(buf, "%d\n", bd->props.max_brightness);
192}
193

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243
244static struct device_attribute bl_device_attributes[] = {
245 __ATTR(bl_power, 0644, backlight_show_power, backlight_store_power),
246 __ATTR(brightness, 0644, backlight_show_brightness,
247 backlight_store_brightness),
248 __ATTR(actual_brightness, 0444, backlight_show_actual_brightness,
249 NULL),
250 __ATTR(max_brightness, 0444, backlight_show_max_brightness, NULL),
251 __ATTR(type, 0444, backlight_show_type, NULL),
237 __ATTR_NULL,
238};
239
240/**
241 * backlight_force_update - tell the backlight subsystem that hardware state
242 * has changed
243 * @bd: the backlight device to update
244 *

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287
288 new_bd->dev.class = backlight_class;
289 new_bd->dev.parent = parent;
290 new_bd->dev.release = bl_device_release;
291 dev_set_name(&new_bd->dev, name);
292 dev_set_drvdata(&new_bd->dev, devdata);
293
294 /* Set default properties */
252 __ATTR_NULL,
253};
254
255/**
256 * backlight_force_update - tell the backlight subsystem that hardware state
257 * has changed
258 * @bd: the backlight device to update
259 *

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302
303 new_bd->dev.class = backlight_class;
304 new_bd->dev.parent = parent;
305 new_bd->dev.release = bl_device_release;
306 dev_set_name(&new_bd->dev, name);
307 dev_set_drvdata(&new_bd->dev, devdata);
308
309 /* Set default properties */
295 if (props)
310 if (props) {
296 memcpy(&new_bd->props, props,
297 sizeof(struct backlight_properties));
311 memcpy(&new_bd->props, props,
312 sizeof(struct backlight_properties));
313 if (props->type <= 0 || props->type >= BACKLIGHT_TYPE_MAX) {
314 WARN(1, "%s: invalid backlight type", name);
315 new_bd->props.type = BACKLIGHT_RAW;
316 }
317 } else {
318 new_bd->props.type = BACKLIGHT_RAW;
319 }
298
299 rc = device_register(&new_bd->dev);
300 if (rc) {
301 kfree(new_bd);
302 return ERR_PTR(rc);
303 }
304
305 rc = backlight_register_fb(new_bd);

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321 rc = device_register(&new_bd->dev);
322 if (rc) {
323 kfree(new_bd);
324 return ERR_PTR(rc);
325 }
326
327 rc = backlight_register_fb(new_bd);

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