linux-kernel - [PATCH] leds: lp50xx: add setting of default intensity from DT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 18 Jan 2021 14:09:47 +0000
From:   Sven Schuchmann <schuchmann@...leissheimer.de>
To:     schuchmann@...leissheimer.de
Cc:     Pavel Machek <pavel@....cz>, Dan Murphy <dmurphy@...com>,
        Rob Herring <robh+dt@...nel.org>, linux-leds@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] leds: lp50xx: add setting of default intensity from DT

In order to use a multicolor-led together with a trigger
the led needs to have an intensity set to see something.
The trigger changes the brightness of the led but if there
is no intensity we actually see nothing.

This patch adds the ability to set the default intensity
of each led so that it is turned on from DT.

Signed-off-by: Sven Schuchmann <schuchmann@...leissheimer.de>
---
 Documentation/devicetree/bindings/leds/leds-lp50xx.yaml | 6 +++++-
 drivers/leds/leds-lp50xx.c                              | 4 ++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/leds/leds-lp50xx.yaml b/Documentation/devicetree/bindings/leds/leds-lp50xx.yaml
index c192b5feadc7..f810c4e84c44 100644
--- a/Documentation/devicetree/bindings/leds/leds-lp50xx.yaml
+++ b/Documentation/devicetree/bindings/leds/leds-lp50xx.yaml
@@ -69,7 +69,11 @@ patternProperties:
     patternProperties:
       "(^led-[0-9a-f]$|led)":
         type: object
-        $ref: common.yaml#
+        allOf:
+          - $ref: common.yaml#
+        properties:
+          default-intensity:
+            The intensity the LED get initialised with.
 
 required:
   - compatible
diff --git a/drivers/leds/leds-lp50xx.c b/drivers/leds/leds-lp50xx.c
index f13117eed976..55b9e0c9e737 100644
--- a/drivers/leds/leds-lp50xx.c
+++ b/drivers/leds/leds-lp50xx.c
@@ -501,6 +501,10 @@ static int lp50xx_probe_dt(struct lp50xx *priv)
 			}
 
 			mc_led_info[num_colors].color_index = color_id;
+
+			fwnode_property_read_u32(led_node, "default-intensity",
+				&mc_led_info[num_colors].intensity);
+
 			num_colors++;
 		}
 
-- 
2.17.1