linux-kernel - [PATCH v3 2/2] Binding: atmel-ssc: add option to choose clock

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Message-Id: <1392012586-30790-3-git-send-email-voice.shen@atmel.com>
Date:	Mon, 10 Feb 2014 14:09:46 +0800
From:	Bo Shen <voice.shen@...el.com>
To:	broonie@...nel.org
Cc:	nicolas.ferre@...el.com, plagnioj@...osoft.com,
	linux-sound@...r.kernel.org, alsa-devel@...a-project.org,
	linux-arm-kernel@...ts.infradead.org,
	Bo Shen <voice.shen@...el.com>,
	Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Rob Landley <rob@...dley.net>, Mark Brown <broonie@...aro.org>,
	Richard Genoud <richard.genoud@...il.com>,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 2/2] Binding: atmel-ssc: add option to choose clock

Add the option to choose clock on which pin input to SSC (as slave).
Default is on TK pin to SSC, add "atmel,clk-from-rk-pin" option to
specify the clock is on RK pin to SSC.

Signed-off-by: Bo Shen <voice.shen@...el.com>
---
Changes in v3:
  - None
Series-changes: 2
  - using "-" replace "_" in binding document

 Documentation/devicetree/bindings/misc/atmel-ssc.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/misc/atmel-ssc.txt b/Documentation/devicetree/bindings/misc/atmel-ssc.txt
index a45ae08..5c1e14e 100644
--- a/Documentation/devicetree/bindings/misc/atmel-ssc.txt
+++ b/Documentation/devicetree/bindings/misc/atmel-ssc.txt
@@ -14,6 +14,14 @@ Required properties for devices compatible with "atmel,at91sam9g45-ssc":
   See Documentation/devicetree/bindings/dma/atmel-dma.txt for details.
 - dma-names: Must be "tx", "rx".
 
+Optional properties:
+  - atmel,clk-from-rk-pin: bool property.
+     - When SSC works in slave mode, according to the hardware design, the
+       clock can get from TK pin, and also can get from RK pin. So, add
+       this parameter to choose where the clock from.
+     - By default the clock is from TK pin, if the clock from RK pin, this
+       property is needed.
+
 Examples:
 - PDC transfer:
 ssc0: ssc@...bc000 {
-- 
1.8.5.2

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