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de73f275a0
If LEDs are configured through device tree and the property 'label' is
omitted, the label is supposed to be generated from the properties
'function' and 'color' if present. While this works fine for e.g. the
'leds-gpio' driver, it did not for 'leds-pwm'.
The reason is, you get this label naming magic only if you add a LED
device through 'devm_led_classdev_register_ext()' and pass a pointer to
the current device tree node.
For the following node from dts the LED appeared as 'led-5' in sysfs
before and as 'red:debug' after this change.
pwm_leds {
compatible = "pwm-leds";
led-5 {
function = LED_FUNCTION_DEBUG;
color = <LED_COLOR_ID_RED>;
pwms = <&pwm0 2 10000000 0>;
max-brightness = <127>;
linux,default-trigger = "heartbeat";
panic-indicator;
};
};
Signed-off-by: Alexander Dahl <post@lespocky.de>
Cc: Marek Behún <marek.behun@nic.cz>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.