linux-kernel - [PATCH 1/2] clk: at91: add a new compatible string for Flexcom in the DT documentation

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Message-ID: <359f6b85c3a8b51a0ea35bacdbdc0443b9fbedcc.1433263218.git.cyrille.pitchen@atmel.com>
Date:	Tue, 2 Jun 2015 18:49:28 +0200
From:	Cyrille Pitchen <cyrille.pitchen@...el.com>
To:	<nicolas.ferre@...el.com>, <boris.brezillon@...e-electrons.com>,
	<alexandre.belloni@...e-electrons.com>, <linux-clk@...r.kernel.org>
CC:	<linux-kernel@...r.kernel.org>, <robh+dt@...nel.org>,
	<pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
	<devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	Cyrille Pitchen <cyrille.pitchen@...el.com>
Subject: [PATCH 1/2] clk: at91: add a new compatible string for Flexcom in the DT documentation

This patches documents the new bindings for the Flexcom clock, which will
be introduced by Atmel sama5d2x chips.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@...el.com>
---
 .../devicetree/bindings/clock/at91-clock.txt         | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Documentation/devicetree/bindings/clock/at91-clock.txt b/Documentation/devicetree/bindings/clock/at91-clock.txt
index 7a4d492..df4f40b 100644
--- a/Documentation/devicetree/bindings/clock/at91-clock.txt
+++ b/Documentation/devicetree/bindings/clock/at91-clock.txt
@@ -77,6 +77,9 @@ Required properties:
 	"atmel,sama5d4-clk-h32mx":
 		at91 h32mx clock
 
+	"atmel,sama5d2-flexcom":
+		at91 flexcom clock
+
 Required properties for SCKC node:
 - reg : defines the IO memory reserved for the SCKC.
 - #size-cells : shall be 0 (reg is used to encode clk id).
@@ -461,3 +464,20 @@ For example:
 		compatible = "atmel,sama5d4-clk-h32mx";
 		clocks = <&mck>;
 	};
+
+Required properties for flexcom clock:
+- #clock-cells : from common clock binding; shall be set to 0.
+- clocks : shall be the Flexcom peripheral clock from PMC.
+- reg : shall be the range for Flexcom dedicated I/O registers (without USART,
+  TWI or SPI registers).
+- atmel,flexcom-mode : shall be a string value among { "spi", "usart", "i2c",
+  "twi" }. "i2c" and "twi" are synonymous.
+
+For example:
+	flx0: flexcom@...34000 {
+		compatible = "atmel,sama5d2-flexcom";
+		#clock-cells = <0>;
+		reg = <0xf8034000 0x200>;
+		clocks = <&flx0_clk>;
+		atmel,flexcom-mode = "spi";
+	};
-- 
1.8.2.2

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