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>
This commit is contained in:
Kim Kyuwon
Richard Purdie
parent
1b18cf413f
commit
8792f7cf43
1 changed files with 73 additions and 13 deletions
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@ -97,6 +97,10 @@ struct bd2802_led {
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enum led_ids led_id;
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enum led_colors color;
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enum led_bits state;
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/* General attributes of RGB LEDs */
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int wave_pattern;
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int rgb_current;
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};
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@ -254,7 +258,7 @@ static void bd2802_set_on(struct bd2802_led *led, enum led_ids id,
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bd2802_reset_cancel(led);
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reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
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bd2802_write_byte(led->client, reg, BD2802_CURRENT_032);
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bd2802_write_byte(led->client, reg, led->rgb_current);
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reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
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bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
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reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);
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@ -275,9 +279,9 @@ static void bd2802_set_blink(struct bd2802_led *led, enum led_ids id,
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reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
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bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
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reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
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bd2802_write_byte(led->client, reg, BD2802_CURRENT_032);
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bd2802_write_byte(led->client, reg, led->rgb_current);
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reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);
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bd2802_write_byte(led->client, reg, BD2802_PATTERN_HALF);
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bd2802_write_byte(led->client, reg, led->wave_pattern);
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bd2802_enable(led, id);
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bd2802_update_state(led, id, color, BD2802_BLINK);
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@ -406,7 +410,7 @@ static void bd2802_enable_adv_conf(struct bd2802_led *led)
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ret = device_create_file(&led->client->dev,
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bd2802_addr_attributes[i]);
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if (ret) {
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dev_err(&led->client->dev, "failed to sysfs file %s\n",
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dev_err(&led->client->dev, "failed: sysfs file %s\n",
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bd2802_addr_attributes[i]->attr.name);
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goto failed_remove_files;
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}
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@ -483,6 +487,52 @@ static struct device_attribute bd2802_adv_conf_attr = {
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.store = bd2802_store_adv_conf,
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};
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#define BD2802_CONTROL_ATTR(attr_name, name_str) \
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static ssize_t bd2802_show_##attr_name(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
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ssize_t ret; \
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down_read(&led->rwsem); \
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ret = sprintf(buf, "0x%02x\n", led->attr_name); \
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up_read(&led->rwsem); \
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return ret; \
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} \
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static ssize_t bd2802_store_##attr_name(struct device *dev, \
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struct device_attribute *attr, const char *buf, size_t count) \
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{ \
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struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
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unsigned long val; \
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int ret; \
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if (!count) \
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return -EINVAL; \
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ret = strict_strtoul(buf, 16, &val); \
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if (ret) \
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return ret; \
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down_write(&led->rwsem); \
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led->attr_name = val; \
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up_write(&led->rwsem); \
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return count; \
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} \
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static struct device_attribute bd2802_##attr_name##_attr = { \
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.attr = { \
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.name = name_str, \
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.mode = 0644, \
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.owner = THIS_MODULE \
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}, \
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.show = bd2802_show_##attr_name, \
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.store = bd2802_store_##attr_name, \
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};
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BD2802_CONTROL_ATTR(wave_pattern, "wave_pattern");
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BD2802_CONTROL_ATTR(rgb_current, "rgb_current");
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static struct device_attribute *bd2802_attributes[] = {
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&bd2802_adv_conf_attr,
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&bd2802_wave_pattern_attr,
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&bd2802_rgb_current_attr,
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};
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static void bd2802_led_work(struct work_struct *work)
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{
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struct bd2802_led *led = container_of(work, struct bd2802_led, work);
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@ -635,7 +685,7 @@ static int __devinit bd2802_probe(struct i2c_client *client,
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{
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struct bd2802_led *led;
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struct bd2802_led_platform_data *pdata;
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int ret;
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int ret, i;
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led = kzalloc(sizeof(struct bd2802_led), GFP_KERNEL);
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if (!led) {
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@ -665,13 +715,20 @@ static int __devinit bd2802_probe(struct i2c_client *client,
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/* To save the power, reset BD2802 after detecting */
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gpio_set_value(led->pdata->reset_gpio, 0);
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/* Default attributes */
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led->wave_pattern = BD2802_PATTERN_HALF;
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led->rgb_current = BD2802_CURRENT_032;
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init_rwsem(&led->rwsem);
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ret = device_create_file(&client->dev, &bd2802_adv_conf_attr);
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if (ret) {
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dev_err(&client->dev, "failed to create sysfs file %s\n",
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bd2802_adv_conf_attr.attr.name);
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goto failed_free;
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for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++) {
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ret = device_create_file(&led->client->dev,
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bd2802_attributes[i]);
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if (ret) {
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dev_err(&led->client->dev, "failed: sysfs file %s\n",
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bd2802_attributes[i]->attr.name);
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goto failed_unregister_dev_file;
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}
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}
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ret = bd2802_register_led_classdev(led);
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@ -681,7 +738,8 @@ static int __devinit bd2802_probe(struct i2c_client *client,
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return 0;
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failed_unregister_dev_file:
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device_remove_file(&client->dev, &bd2802_adv_conf_attr);
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for (i--; i >= 0; i--)
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device_remove_file(&led->client->dev, bd2802_attributes[i]);
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failed_free:
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i2c_set_clientdata(client, NULL);
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kfree(led);
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@ -692,12 +750,14 @@ static int __devinit bd2802_probe(struct i2c_client *client,
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static int __exit bd2802_remove(struct i2c_client *client)
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{
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struct bd2802_led *led = i2c_get_clientdata(client);
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int i;
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bd2802_unregister_led_classdev(led);
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gpio_set_value(led->pdata->reset_gpio, 0);
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bd2802_unregister_led_classdev(led);
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if (led->adf_on)
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bd2802_disable_adv_conf(led);
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device_remove_file(&client->dev, &bd2802_adv_conf_attr);
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for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++)
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device_remove_file(&led->client->dev, bd2802_attributes[i]);
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i2c_set_clientdata(client, NULL);
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kfree(led);
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