LED connected to PWM

Required properties:
- compatible : should be "pwm-leds".

Each LED is represented as a sub-node of the pwm-leds device.  Each
node's name represents the name of the corresponding LED.

LED sub-node properties:
- pwms : PWM property to point to the PWM device (phandle)/port (id) and to
  specify the period time to be used: <&phandle id period_ns>;
- pwm-names : (optional) Name to be used by the PWM subsystem for the PWM device
  For the pwms and pwm-names property please refer to:
  Documentation/devicetree/bindings/pwm/pwm.txt
- max-brightness : Maximum brightness possible for the LED
- active-low : (optional) For PWMs where the LED is wired to supply
  rather than ground.
- label :  (optional)
  see Documentation/devicetree/bindings/leds/common.txt
- linux,default-trigger :  (optional)
  see Documentation/devicetree/bindings/leds/common.txt

Example:

twl_pwm: pwm {
	/* provides two PWMs (id 0, 1 for PWM1 and PWM2) */
	compatible = "ti,twl6030-pwm";
	#pwm-cells = <2>;
};

twl_pwmled: pwmled {
	/* provides one PWM (id 0 for Charing indicator LED) */
	compatible = "ti,twl6030-pwmled";
	#pwm-cells = <2>;
};

pwmleds {
	compatible = "pwm-leds";
	kpad {
		label = "omap4::keypad";
		pwms = <&twl_pwm 0 7812500>;
		max-brightness = <127>;
	};

	charging {
		label = "omap4:green:chrg";
		pwms = <&twl_pwmled 0 7812500>;
		max-brightness = <255>;
	};
};
lass='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
<table class='tabs'><tr><td>
<a href='/cgit.cgi/linux/net-next.git/'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?id=a0c20deae992527ba90df9a6f87d396b7cee3922'>refs</a><a href='/cgit.cgi/linux/net-next.git/log/Documentation'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/Documentation?id=a0c20deae992527ba90df9a6f87d396b7cee3922'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/Documentation?id=a0c20deae992527ba90df9a6f87d396b7cee3922'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/Documentation?id=a0c20deae992527ba90df9a6f87d396b7cee3922'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/Documentation'>
<input type='hidden' name='id' value='a0c20deae992527ba90df9a6f87d396b7cee3922'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=a0c20deae992527ba90df9a6f87d396b7cee3922'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation?id=a0c20deae992527ba90df9a6f87d396b7cee3922'>Documentation</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='a0c20deae992527ba90df9a6f87d396b7cee3922'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Corey Minyard &lt;cminyard@mvista.com&gt;</td><td class='right'>2016-05-23 16:24:25 -0700</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-05-23 17:04:14 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation?id=a0c20deae992527ba90df9a6f87d396b7cee3922'>a0c20deae992527ba90df9a6f87d396b7cee3922</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation?id=a0c20deae992527ba90df9a6f87d396b7cee3922'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=a0c20deae992527ba90df9a6f87d396b7cee3922'>e02f029e0e13cd7a62a06c5994cbf0a4aefd2d8a</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation?id=a0c20deae992527ba90df9a6f87d396b7cee3922'>Documentation</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation?id=7a0058ec78602da02b34fa2ae3afc523e90d1ab2'>7a0058ec78602da02b34fa2ae3afc523e90d1ab2</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation?id=a0c20deae992527ba90df9a6f87d396b7cee3922&amp;id2=7a0058ec78602da02b34fa2ae3afc523e90d1ab2'>diff</a>)</td></tr></table>
<div class='commit-subject'>kdump: fix gdb macros work work with newer and 64-bit kernels</div><div class='commit-msg'>Lots of little changes needed to be made to clean these up, remove the
four byte pointer assumption and traverse the pid queue properly.  Also
consolidate the traceback code into a single function instead of having
three copies of it.

Link: http://lkml.kernel.org/r/1462926655-9390-1-git-send-email-minyard@acm.org
Signed-off-by: Corey Minyard &lt;cminyard@mvista.com&gt;
Acked-by: Baoquan He &lt;bhe@redhat.com&gt;
Cc: Vivek Goyal &lt;vgoyal@redhat.com&gt;
Cc: Haren Myneni &lt;hbabu@us.ibm.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=a0c20deae992527ba90df9a6f87d396b7cee3922'>Diffstat</a> (limited to 'Documentation')</div><table summary='diffstat' class='diffstat'>