linux-kernel - [PATCH 2/4] ASoC: dt-bindings: wlf,wm8524: Add a property to specify power up sequency time

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:   Wed, 22 Feb 2023 19:39:43 +0800
From:   Chancel Liu <chancel.liu@....com>
To:     lgirdwood@...il.com, broonie@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, perex@...ex.cz, tiwai@...e.com,
        ckeepax@...nsource.cirrus.com, patches@...nsource.cirrus.com,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Cc:     Chancel Liu <chancel.liu@....com>
Subject: [PATCH 2/4] ASoC: dt-bindings: wlf,wm8524: Add a property to specify power up sequency time

This property specifies power up to audio out time. It's necessary
beacause this device has to wait some time before ready to output audio
after MCLK, BCLK and MUTE=1 are enabled. For more details about the
timing constraints, please refer to WTN0302 on
https://www.cirrus.com/products/wm8524/

Signed-off-by: Chancel Liu <chancel.liu@....com>
---
 .../devicetree/bindings/sound/wlf,wm8524.yaml          | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/wlf,wm8524.yaml b/Documentation/devicetree/bindings/sound/wlf,wm8524.yaml
index 09c54cc7de95..54b4da5470e4 100644
--- a/Documentation/devicetree/bindings/sound/wlf,wm8524.yaml
+++ b/Documentation/devicetree/bindings/sound/wlf,wm8524.yaml
@@ -21,6 +21,15 @@ properties:
     description:
       a GPIO spec for the MUTE pin.
 
+  wlf,power-up-delay-ms:
+    maximum: 1500
+    default: 100
+    description:
+      Power up sequency delay time in millisecond. It specifies power up to
+      audio out time. For more details about the timing constraints of this
+      device, please refer to WTN0302 on
+      https://www.cirrus.com/products/wm8524/.
+
 required:
   - compatible
   - wlf,mute-gpios
@@ -34,4 +43,5 @@ examples:
     wm8524: codec {
             compatible = "wlf,wm8524";
             wlf,mute-gpios = <&gpio1 8 GPIO_ACTIVE_LOW>;
+            wlf,power-up-delay-ms = <300>;
     };
-- 
2.25.1