linux-kernel - [PATCH v2 1/1] DT: video: atmel_lcdc: Add example of fixed framebuffer memory

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Message-Id: <1425540938-20538-1-git-send-email-alexander.stein@systec-electronic.com>
Date:	Thu,  5 Mar 2015 08:35:38 +0100
From:	Alexander Stein <alexander.stein@...tec-electronic.com>
To:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>
Cc:	Alexander Stein <alexander.stein@...tec-electronic.com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Nicolas Ferre <nicolas.ferre@...el.com>
Subject: [PATCH v2 1/1] DT: video: atmel_lcdc: Add example of fixed framebuffer memory

This drivers allows a fixed framebuffer memory to be set by an additional
IORESOURCE_MEM resource. Thus add an example to the DT documentation.

Signed-off-by: Alexander Stein <alexander.stein@...tec-electronic.com>
Acked-by: Nicolas Ferre <nicolas.ferre@...el.com>
---
Changes in v2:
* Fix typo noticed by checkpatch.pl

 Documentation/devicetree/bindings/video/atmel,lcdc.txt | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/video/atmel,lcdc.txt b/Documentation/devicetree/bindings/video/atmel,lcdc.txt
index f059dd0..ecb8da0 100644
--- a/Documentation/devicetree/bindings/video/atmel,lcdc.txt
+++ b/Documentation/devicetree/bindings/video/atmel,lcdc.txt
@@ -10,7 +10,9 @@ Required properties:
 	"atmel,at91sam9g45es-lcdc" ,
 	"atmel,at91sam9rl-lcdc" ,
 	"atmel,at32ap-lcdc"
-- reg : Should contain 1 register ranges(address and length)
+- reg : Should contain 1 register ranges(address and length).
+	Can contain an additional register range(address and length)
+	for fixed framebuffer memory. Useful for dedicated memories.
 - interrupts : framebuffer controller interrupt
 - display: a phandle pointing to the display node
 
@@ -38,6 +40,14 @@ Example:
 
 	};
 
+Example for fixed framebuffer memory:
+
+	fb0: fb@...0500000 {
+		compatible = "atmel,at91sam9263-lcdc";
+		reg = <0x00700000 0x1000 0x70000000 0x200000>;
+		[...]
+	};
+
 Atmel LCDC Display
 -----------------------------------------------------
 Required properties (as per of_videomode_helper):
-- 
2.0.5

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