* [PATCH 2/2] dt: bindings: pca9532: add description of pwm and psc properties
[not found] <1023311712.12962.1600197989828@mail.vodafone.de>
@ 2020-09-16 11:14 ` Markus Moll
2020-09-19 11:59 ` Pavel Machek
1 sibling, 0 replies; 3+ messages in thread
From: Markus Moll @ 2020-09-16 11:14 UTC (permalink / raw)
To: linux-leds; +Cc: Riku Voipio, Pavel Machek
These new properties allow users to configure the PWM when the device is
probed. This is useful for e.g. uninterrupted blinking during boot.
Signed-off-by: Markus Moll <mmoll@de.pepperl-fuchs.com>
---
Resending this patch as it seems the first attempt wasn't successful.
Apologies if you received this patch twice.
.../devicetree/bindings/leds/leds-pca9532.txt | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/Documentation/devicetree/bindings/leds/leds-pca9532.txt b/Documentation/devicetree/bindings/leds/leds-pca9532.txt
index f769c52e364..3aa05eca9df 100644
--- a/Documentation/devicetree/bindings/leds/leds-pca9532.txt
+++ b/Documentation/devicetree/bindings/leds/leds-pca9532.txt
@@ -11,6 +11,14 @@ Required properties:
"nxp,pca9533"
- reg - I2C slave address
+Optional properties:
+ - nxp,pwm: array of two 8-bit values specifying the blink duty cycle
+ fractions of each pwm (default )
+ The duty cycle is pwm/256.
+ - nxp,psc: array of two 8-bit values specifying the blink period of
+ each pwm (default )
+ The period is (psc+1)/152 seconds.
+
Each led is represented as a sub-node of the nxp,pca9530.
Optional sub-node properties:
@@ -26,6 +34,8 @@ Example:
leds: pca9530@60 {
compatible = "nxp,pca9530";
reg = ;
+ nxp,pwm = /bits/ 8 ; // 50% duty cycle
+ nxp,psc = /bits/ 8 ; // 1Hz and 4Hz, respectively
red-power {
label = "pca:red:power";
--
2.25.1
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH 2/2] dt: bindings: pca9532: add description of pwm and psc properties
[not found] <1023311712.12962.1600197989828@mail.vodafone.de>
2020-09-16 11:14 ` [PATCH 2/2] dt: bindings: pca9532: add description of pwm and psc properties Markus Moll
@ 2020-09-19 11:59 ` Pavel Machek
2020-09-22 19:22 ` Markus Moll
1 sibling, 1 reply; 3+ messages in thread
From: Pavel Machek @ 2020-09-19 11:59 UTC (permalink / raw)
To: Markus Moll; +Cc: linux-leds, Riku Voipio
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On Tue 2020-09-15 21:26:29, Markus Moll wrote:
> These new properties allow users to configure the PWM when the device is
> probed. This is useful for e.g. uninterrupted blinking during boot.
>
> Signed-off-by: Markus Moll <mmoll@de.pepperl-fuchs.com>
> ---
> .../devicetree/bindings/leds/leds-pca9532.txt | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/leds/leds-pca9532.txt b/Documentation/devicetree/bindings/leds/leds-pca9532.txt
> index f769c52e364..3aa05eca9df 100644
> --- a/Documentation/devicetree/bindings/leds/leds-pca9532.txt
> +++ b/Documentation/devicetree/bindings/leds/leds-pca9532.txt
> @@ -11,6 +11,14 @@ Required properties:
> "nxp,pca9533"
> - reg - I2C slave address
>
> +Optional properties:
> + - nxp,pwm: array of two 8-bit values specifying the blink duty cycle
> + fractions of each pwm (default <0 0>)
> + The duty cycle is pwm/256.
> + - nxp,psc: array of two 8-bit values specifying the blink period of
> + each pwm (default <0 0>)
> + The period is (psc+1)/152 seconds.
> +
> Each led is represented as a sub-node of the nxp,pca9530.
This will need ACK from dt people.
Also patch came whitespace-damaged.
Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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