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SubjectRe: [PATCH -next 1/2] leds: add /sys/devices/virtual/led-trigger/
On Thu, Oct 03, 2019 at 12:13:00AM +0900, Akinobu Mita wrote:
> Reading /sys/class/leds/<led>/trigger returns all available LED triggers.
> However, this violates the "one value per file" rule of sysfs.
>
> This makes led_triggers "real" devices and provides an
> /sys/devices/virtual/led-trigger/ directory that contains a sub-directoriy
> for each LED trigger device. The name of the sub-directory matches the LED
> trigger name.
>
> We can find all available LED triggers by listing this directory contents.
>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: "Rafael J. Wysocki" <rafael@kernel.org>
> Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
> Cc: Pavel Machek <pavel@ucw.cz>
> Cc: Dan Murphy <dmurphy@ti.com>
> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
> ---
> .../ABI/testing/sysfs-devices-virtual-led-trigger | 8 +++
> drivers/leds/led-triggers.c | 57 ++++++++++++++++++++++
> include/linux/leds.h | 3 ++
> 3 files changed, 68 insertions(+)
> create mode 100644 Documentation/ABI/testing/sysfs-devices-virtual-led-trigger
>
> diff --git a/Documentation/ABI/testing/sysfs-devices-virtual-led-trigger b/Documentation/ABI/testing/sysfs-devices-virtual-led-trigger
> new file mode 100644
> index 0000000..b8eb8f3
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-devices-virtual-led-trigger
> @@ -0,0 +1,8 @@
> +What: /sys/devices/virtual/leds-trigger/
> +Date: September 2019
> +KernelVersion: 5.5
> +Contact: linux-leds@vger.kernel.org
> +Description:
> + This directory contains a sub-directoriy for each LED trigger

"directoriy"?

> + device. The name of the sub-directory matches the LED trigger
> + name.

You are just creating directories here, and doing nothing with them,
why? That seems kind of pointless.

thanks,

greg k-h

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