linux-kernel - [PATCH v2 5/5] ASoC: cs35l41: Document CS35l41 shared boost

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Message-Id: <20230207162526.1024286-6-lucas.tanure@collabora.com>
Date:   Tue,  7 Feb 2023 16:25:26 +0000
From:   Lucas Tanure <lucas.tanure@...labora.com>
To:     David Rhodes <david.rhodes@...rus.com>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc:     alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        patches@...nsource.cirrus.com, linux-kernel@...r.kernel.org,
        kernel@...labora.com, Lucas Tanure <lucas.tanure@...labora.com>
Subject: [PATCH v2 5/5] ASoC: cs35l41: Document CS35l41 shared boost

Describe the properties used for shared boost
configuration.
Based on David Rhodes shared boost patches.

Signed-off-by: Lucas Tanure <lucas.tanure@...labora.com>
---
 .../devicetree/bindings/sound/cirrus,cs35l41.yaml      | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/sound/cirrus,cs35l41.yaml b/Documentation/devicetree/bindings/sound/cirrus,cs35l41.yaml
index 8465623bbd96..54f769159ce4 100644
--- a/Documentation/devicetree/bindings/sound/cirrus,cs35l41.yaml
+++ b/Documentation/devicetree/bindings/sound/cirrus,cs35l41.yaml
@@ -86,12 +86,20 @@ properties:
       External Boost must have GPIO1 as GPIO output. GPIO1 will be set high to
       enable boost voltage.
       External Boost without GPIO1 as VSPK switch is no longer supported.
+      Shared boost allows two amplifiers to share a single boost circuit by
+      communicating on the MDSYNC bus. The passive amplifier does not control
+      the boost and receives data from the active amplifier. GPIO1 should be
+      configured for Sync when shared boost is used. Shared boost is not
+      compatible with External boost. Active amplifier requires
+      boost-peak-milliamp, boost-ind-nanohenry and boost-cap-microfarad.
       0 = Internal Boost
       1 = External Boost
       2 = External Boost without VPSK switch (Do not use in new systems)
+      3 = Shared Boost Active
+      4 = Shared Boost Passive
     $ref: /schemas/types.yaml#/definitions/uint32
     minimum: 0
-    maximum: 2
+    maximum: 4
 
   cirrus,gpio1-polarity-invert:
     description:
-- 
2.39.1