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From:   Arnaud Ferraris <arnaud.ferraris@collabora.com>
Cc:     kernel@collabora.com,
        Arnaud Ferraris <arnaud.ferraris@collabora.com>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Timur Tabi <timur@kernel.org>,
        Nicolin Chen <nicoleotsuka@gmail.com>,
        Xiubo Li <Xiubo.Lee@gmail.com>,
        Fabio Estevam <festevam@gmail.com>,
        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>, alsa-devel@alsa-project.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linuxppc-dev@lists.ozlabs.org
Subject: [PATCH 1/4] dt-bindings: sound: fsl,asrc: add properties to select in/out clocks
Date:   Thu,  2 Jul 2020 16:22:32 +0200
Message-Id: <20200702142235.235869-2-arnaud.ferraris@collabora.com>
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The ASRC peripheral accepts a wide range of input and output clocks, but
no mechanism exists at the moment to define those as they are currently
hardcoded in the driver.

This commit adds new properties allowing selection of arbitrary input
and output clocks.

Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
---
 Documentation/devicetree/bindings/sound/fsl,asrc.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/fsl,asrc.txt b/Documentation/devicetree/bindings/sound/fsl,asrc.txt
index 998b4c8a7f78..e26ce9bad617 100644
--- a/Documentation/devicetree/bindings/sound/fsl,asrc.txt
+++ b/Documentation/devicetree/bindings/sound/fsl,asrc.txt
@@ -55,6 +55,12 @@ Optional properties:
 			  Ends, which can replace the fsl,asrc-width.
 			  The value is 2 (S16_LE), or 6 (S24_LE).
 
+   - fsl,asrc-input-clock	: Input clock ID, defaults to INCLK_NONE
+				  (see enum asrc_inclk in fsl_asrc.h)
+
+   - fsl,asrc-output-clock	: Output clock ID, defaults to OUTCLK_ASRCK1_CLK
+				  (see enum asrc_outclk in fsl_asrc.h)
+
 Example:
 
 asrc: asrc@2034000 {
@@ -77,4 +83,6 @@ asrc: asrc@2034000 {
 		"txa", "txb", "txc";
 	fsl,asrc-rate  = <48000>;
 	fsl,asrc-width = <16>;
+	fsl,asrc-input-clock = <0x3>;
+	fsl,asrc-output-clock = <0xf>;
 };
-- 
2.27.0