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authorKim Kyuwon <chammoru@gmail.com>2009-06-10 15:48:50 -0400
committerRichard Purdie <rpurdie@linux.intel.com>2009-06-23 15:19:10 -0400
commit8792f7cf4368f9bc337eee65851d8e7abbbf946c (patch)
tree25c6c2974c77f7dcdcdf8943bbe62e254ff9623d /drivers/leds/leds-bd2802.c
parent1b18cf413f63ff6de5ba3e5028e869c21322a4df (diff)
leds: add the sysfs interface into the leds-bd2802 driver for changing wave pattern and led current.
Allow the user application to change the wave pattern and led current by 'wave_pattern' and 'rgb_current' sysfs files. Signed-off-by: Kim Kyuwon <q1.kim@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Diffstat (limited to 'drivers/leds/leds-bd2802.c')
-rw-r--r--drivers/leds/leds-bd2802.c86
1 files changed, 73 insertions, 13 deletions
diff --git a/drivers/leds/leds-bd2802.c b/drivers/leds/leds-bd2802.c
index 7a03efd54f69..779d7f262c04 100644
--- a/drivers/leds/leds-bd2802.c
+++ b/drivers/leds/leds-bd2802.c
@@ -97,6 +97,10 @@ struct bd2802_led {
97 enum led_ids led_id; 97 enum led_ids led_id;
98 enum led_colors color; 98 enum led_colors color;
99 enum led_bits state; 99 enum led_bits state;
100
101 /* General attributes of RGB LEDs */
102 int wave_pattern;
103 int rgb_current;
100}; 104};
101 105
102 106
@@ -254,7 +258,7 @@ static void bd2802_set_on(struct bd2802_led *led, enum led_ids id,
254 bd2802_reset_cancel(led); 258 bd2802_reset_cancel(led);
255 259
256 reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP); 260 reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
257 bd2802_write_byte(led->client, reg, BD2802_CURRENT_032); 261 bd2802_write_byte(led->client, reg, led->rgb_current);
258 reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP); 262 reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
259 bd2802_write_byte(led->client, reg, BD2802_CURRENT_000); 263 bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
260 reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN); 264 reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);
@@ -275,9 +279,9 @@ static void bd2802_set_blink(struct bd2802_led *led, enum led_ids id,
275 reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP); 279 reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
276 bd2802_write_byte(led->client, reg, BD2802_CURRENT_000); 280 bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
277 reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP); 281 reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
278 bd2802_write_byte(led->client, reg, BD2802_CURRENT_032); 282 bd2802_write_byte(led->client, reg, led->rgb_current);
279 reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN); 283 reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);
280 bd2802_write_byte(led->client, reg, BD2802_PATTERN_HALF); 284 bd2802_write_byte(led->client, reg, led->wave_pattern);
281 285
282 bd2802_enable(led, id); 286 bd2802_enable(led, id);
283 bd2802_update_state(led, id, color, BD2802_BLINK); 287 bd2802_update_state(led, id, color, BD2802_BLINK);
@@ -406,7 +410,7 @@ static void bd2802_enable_adv_conf(struct bd2802_led *led)
406 ret = device_create_file(&led->client->dev, 410 ret = device_create_file(&led->client->dev,
407 bd2802_addr_attributes[i]); 411 bd2802_addr_attributes[i]);
408 if (ret) { 412 if (ret) {
409 dev_err(&led->client->dev, "failed to sysfs file %s\n", 413 dev_err(&led->client->dev, "failed: sysfs file %s\n",
410 bd2802_addr_attributes[i]->attr.name); 414 bd2802_addr_attributes[i]->attr.name);
411 goto failed_remove_files; 415 goto failed_remove_files;
412 } 416 }
@@ -483,6 +487,52 @@ static struct device_attribute bd2802_adv_conf_attr = {
483 .store = bd2802_store_adv_conf, 487 .store = bd2802_store_adv_conf,
484}; 488};
485 489
490#define BD2802_CONTROL_ATTR(attr_name, name_str) \
491static ssize_t bd2802_show_##attr_name(struct device *dev, \
492 struct device_attribute *attr, char *buf) \
493{ \
494 struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
495 ssize_t ret; \
496 down_read(&led->rwsem); \
497 ret = sprintf(buf, "0x%02x\n", led->attr_name); \
498 up_read(&led->rwsem); \
499 return ret; \
500} \
501static ssize_t bd2802_store_##attr_name(struct device *dev, \
502 struct device_attribute *attr, const char *buf, size_t count) \
503{ \
504 struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
505 unsigned long val; \
506 int ret; \
507 if (!count) \
508 return -EINVAL; \
509 ret = strict_strtoul(buf, 16, &val); \
510 if (ret) \
511 return ret; \
512 down_write(&led->rwsem); \
513 led->attr_name = val; \
514 up_write(&led->rwsem); \
515 return count; \
516} \
517static struct device_attribute bd2802_##attr_name##_attr = { \
518 .attr = { \
519 .name = name_str, \
520 .mode = 0644, \
521 .owner = THIS_MODULE \
522 }, \
523 .show = bd2802_show_##attr_name, \
524 .store = bd2802_store_##attr_name, \
525};
526
527BD2802_CONTROL_ATTR(wave_pattern, "wave_pattern");
528BD2802_CONTROL_ATTR(rgb_current, "rgb_current");
529
530static struct device_attribute *bd2802_attributes[] = {
531 &bd2802_adv_conf_attr,
532 &bd2802_wave_pattern_attr,
533 &bd2802_rgb_current_attr,
534};
535
486static void bd2802_led_work(struct work_struct *work) 536static void bd2802_led_work(struct work_struct *work)
487{ 537{
488 struct bd2802_led *led = container_of(work, struct bd2802_led, work); 538 struct bd2802_led *led = container_of(work, struct bd2802_led, work);
@@ -635,7 +685,7 @@ static int __devinit bd2802_probe(struct i2c_client *client,
635{ 685{
636 struct bd2802_led *led; 686 struct bd2802_led *led;
637 struct bd2802_led_platform_data *pdata; 687 struct bd2802_led_platform_data *pdata;
638 int ret; 688 int ret, i;
639 689
640 led = kzalloc(sizeof(struct bd2802_led), GFP_KERNEL); 690 led = kzalloc(sizeof(struct bd2802_led), GFP_KERNEL);
641 if (!led) { 691 if (!led) {
@@ -665,13 +715,20 @@ static int __devinit bd2802_probe(struct i2c_client *client,
665 /* To save the power, reset BD2802 after detecting */ 715 /* To save the power, reset BD2802 after detecting */
666 gpio_set_value(led->pdata->reset_gpio, 0); 716 gpio_set_value(led->pdata->reset_gpio, 0);
667 717
718 /* Default attributes */
719 led->wave_pattern = BD2802_PATTERN_HALF;
720 led->rgb_current = BD2802_CURRENT_032;
721
668 init_rwsem(&led->rwsem); 722 init_rwsem(&led->rwsem);
669 723
670 ret = device_create_file(&client->dev, &bd2802_adv_conf_attr); 724 for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++) {
671 if (ret) { 725 ret = device_create_file(&led->client->dev,
672 dev_err(&client->dev, "failed to create sysfs file %s\n", 726 bd2802_attributes[i]);
673 bd2802_adv_conf_attr.attr.name); 727 if (ret) {
674 goto failed_free; 728 dev_err(&led->client->dev, "failed: sysfs file %s\n",
729 bd2802_attributes[i]->attr.name);
730 goto failed_unregister_dev_file;
731 }
675 } 732 }
676 733
677 ret = bd2802_register_led_classdev(led); 734 ret = bd2802_register_led_classdev(led);
@@ -681,7 +738,8 @@ static int __devinit bd2802_probe(struct i2c_client *client,
681 return 0; 738 return 0;
682 739
683failed_unregister_dev_file: 740failed_unregister_dev_file:
684 device_remove_file(&client->dev, &bd2802_adv_conf_attr); 741 for (i--; i >= 0; i--)
742 device_remove_file(&led->client->dev, bd2802_attributes[i]);
685failed_free: 743failed_free:
686 i2c_set_clientdata(client, NULL); 744 i2c_set_clientdata(client, NULL);
687 kfree(led); 745 kfree(led);
@@ -692,12 +750,14 @@ failed_free:
692static int __exit bd2802_remove(struct i2c_client *client) 750static int __exit bd2802_remove(struct i2c_client *client)
693{ 751{
694 struct bd2802_led *led = i2c_get_clientdata(client); 752 struct bd2802_led *led = i2c_get_clientdata(client);
753 int i;
695 754
696 bd2802_unregister_led_classdev(led);
697 gpio_set_value(led->pdata->reset_gpio, 0); 755 gpio_set_value(led->pdata->reset_gpio, 0);
756 bd2802_unregister_led_classdev(led);
698 if (led->adf_on) 757 if (led->adf_on)
699 bd2802_disable_adv_conf(led); 758 bd2802_disable_adv_conf(led);
700 device_remove_file(&client->dev, &bd2802_adv_conf_attr); 759 for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++)
760 device_remove_file(&led->client->dev, bd2802_attributes[i]);
701 i2c_set_clientdata(client, NULL); 761 i2c_set_clientdata(client, NULL);
702 kfree(led); 762 kfree(led);
703 763