linux-kernel - [PATCH 2/3] dt-bindings: sound: Clarify the usage of clocks in SAI

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Date:   Tue, 28 May 2019 13:21:01 +0000
From:   Daniel Baluta <daniel.baluta@....com>
To:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "timur@...nel.org" <timur@...nel.org>,
        "nicoleotsuka@...il.com" <nicoleotsuka@...il.com>,
        "broonie@...nel.org" <broonie@...nel.org>
CC:     "mark.rutland@....com" <mark.rutland@....com>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Xiubo.Lee@...il.com" <Xiubo.Lee@...il.com>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "tiwai@...e.com" <tiwai@...e.com>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        Daniel Baluta <daniel.baluta@....com>
Subject: [PATCH 2/3] dt-bindings: sound: Clarify the usage of clocks in SAI

SAI might have up to 4 clock sources selected by an internal
CLK mux.

On imx6/7 mclk0/mclk1 are the same, while on imx8 mclk0 and
mclk1 are coming from different sources.

Signed-off-by: Daniel Baluta <daniel.baluta@....com>
---
 Documentation/devicetree/bindings/sound/fsl-sai.txt | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/fsl-sai.txt b/Documentation/devicetree/bindings/sound/fsl-sai.txt
index 2e726b983845..db0497d1920a 100644
--- a/Documentation/devicetree/bindings/sound/fsl-sai.txt
+++ b/Documentation/devicetree/bindings/sound/fsl-sai.txt
@@ -15,8 +15,9 @@ Required properties:
   - clocks		: Must contain an entry for each entry in clock-names.
 
   - clock-names		: Must include the "bus" for register access and
-			  "mclk1", "mclk2", "mclk3" for bit clock and frame
-			  clock providing.
+			  "mclk0", "mclk1", "mclk2", "mclk3" the four clock
+			  sources of the SAI clock MUX selecting a clock
+			  for bit clock and frame clock providing.
   - dmas		: Generic dma devicetree binding as described in
 			  Documentation/devicetree/bindings/dma/dma.txt.
 
-- 
2.17.1