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media: v4l2-flash-led-class: Create separate sub-devices for indicators

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The V4L2 flash interface allows controlling multiple LEDs through a single
sub-devices if, and only if, these LEDs are of different types. This
approach scales badly for flash controllers that drive multiple flash LEDs
or for LED specific associations. Essentially, the original assumption of a
LED driver chip that drives a single flash LED and an indicator LED is no
longer valid.

Address the matter by registering one sub-device per LED.

Signed-off-by: Sakari Ailus <[email protected]>
Reviewed-by: Jacek Anaszewski <[email protected]>
Acked-by: Pavel Machek <[email protected]>
Reviewed-by: Rui Miguel Silva <[email protected]> (for greybus/light)
Acked-by: Hans Verkuil <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
This commit is contained in:
Sakari Ailus 2017-07-18 09:26:59 -04:00 • committed by Mauro Carvalho Chehab
commit 503dd28af1
5 changed files with 117 additions and 67 deletions
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4
drivers/leds/leds-aat1290.c
View file

@ -432,7 +432,7 @@ static void aat1290_init_v4l2_flash_config(struct aat1290_led *led,
strlcpy(v4l2_sd_cfg->dev_name, led_cdev->name,
sizeof(v4l2_sd_cfg->dev_name));
s = &v4l2_sd_cfg->torch_intensity;
s = &v4l2_sd_cfg->intensity;
s->min = led->mm_current_scale[0];
s->max = led_cfg->max_mm_current;
s->step = 1;
@ -504,7 +504,7 @@ static int aat1290_led_probe(struct platform_device *pdev)
/* Create V4L2 Flash subdev. */
led->v4l2_flash = v4l2_flash_init(dev, of_fwnode_handle(sub_node),
fled_cdev, NULL, &v4l2_flash_ops,
fled_cdev, &v4l2_flash_ops,
&v4l2_sd_cfg);
if (IS_ERR(led->v4l2_flash)) {
ret = PTR_ERR(led->v4l2_flash);

4
drivers/leds/leds-max77693.c
View file

@ -856,7 +856,7 @@ static void max77693_init_v4l2_flash_config(struct max77693_sub_led *sub_led,
"%s %d-%04x", sub_led->fled_cdev.led_cdev.name,
i2c_adapter_id(i2c->adapter), i2c->addr);
s = &v4l2_sd_cfg->torch_intensity;
s = &v4l2_sd_cfg->intensity;
s->min = TORCH_IOUT_MIN;
s->max = sub_led->fled_cdev.led_cdev.max_brightness * TORCH_IOUT_STEP;
s->step = TORCH_IOUT_STEP;
@ -931,7 +931,7 @@ static int max77693_register_led(struct max77693_sub_led *sub_led,
/* Register in the V4L2 subsystem. */
sub_led->v4l2_flash = v4l2_flash_init(dev, of_fwnode_handle(sub_node),
fled_cdev, NULL, &v4l2_flash_ops,
fled_cdev, &v4l2_flash_ops,
&v4l2_sd_cfg);
if (IS_ERR(sub_led->v4l2_flash)) {
ret = PTR_ERR(sub_led->v4l2_flash);