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leds-lp55xx: support device specific attributes 

To support device specific attributes, new common driver function is added.
 Eventually those are created on registering the sysfs with common dev attrs.
 Furthermore, this patch makes adding device attributes simple in each driver.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
hifive-unleashed-5.1
Milo(Woogyom) Kim 2013-02-05 19:20:01 +09:00 committed by Bryan Wu
parent db6eaf8388
commit 240085e255
2 changed files with 16 additions and 1 deletions
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13
drivers/leds/leds-lp55xx-common.c
View File

@ -493,8 +493,19 @@ EXPORT_SYMBOL_GPL(lp55xx_unregister_leds);
int lp55xx_register_sysfs(struct lp55xx_chip *chip)
{
struct device *dev = &chip->cl->dev;
struct lp55xx_device_config *cfg = chip->cfg;
int ret;
return sysfs_create_group(&dev->kobj, &lp55xx_engine_attr_group);
if (!cfg->run_engine || !cfg->firmware_cb)
goto dev_specific_attrs;
ret = sysfs_create_group(&dev->kobj, &lp55xx_engine_attr_group);
if (ret)
return ret;
dev_specific_attrs:
return cfg->dev_attr_group ?
sysfs_create_group(&dev->kobj, cfg->dev_attr_group) : 0;
}
EXPORT_SYMBOL_GPL(lp55xx_register_sysfs);

4
drivers/leds/leds-lp55xx-common.h
View File

@ -45,6 +45,7 @@ struct lp55xx_reg {
* @set_led_current : LED current set function
* @firmware_cb : Call function when the firmware is loaded
* @run_engine : Run internal engine for pattern
* @dev_attr_group : Device specific attributes
*/
struct lp55xx_device_config {
const struct lp55xx_reg reset;
@ -65,6 +66,9 @@ struct lp55xx_device_config {
/* used for running firmware LED patterns */
void (*run_engine) (struct lp55xx_chip *chip, bool start);
/* additional device specific attributes */
const struct attribute_group *dev_attr_group;
};
/*