linux-kernel - [PATCH 2/2] dt-bindings: mtd: mtk-quadspi: update bindings for mmap flash read

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Message-Id: <20191106140748.13100-3-gch981213@gmail.com>
Date:   Wed,  6 Nov 2019 22:07:48 +0800
From:   Chuanhong Guo <gch981213@...il.com>
To:     linux-mtd@...ts.infradead.org
Cc:     David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Tudor Ambarus <tudor.ambarus@...rochip.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Chuanhong Guo <gch981213@...il.com>
Subject: [PATCH 2/2] dt-bindings: mtd: mtk-quadspi: update bindings for mmap flash read

update register descriptions and add an example binding using it.

Signed-off-by: Chuanhong Guo <gch981213@...il.com>
---
 .../devicetree/bindings/mtd/mtk-quadspi.txt   | 21 ++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt b/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
index a12e3b5c495d..4860f6e96f5a 100644
--- a/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
+++ b/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
@@ -12,7 +12,10 @@ Required properties:
 		  "mediatek,mt7623-nor", "mediatek,mt8173-nor"
 		  "mediatek,mt7629-nor", "mediatek,mt8173-nor"
 		  "mediatek,mt8173-nor"
-- reg: 		  physical base address and length of the controller's register
+- reg: 		  Contains one or two entries, each of which is a tuple consisting of a
+		  physical address and length. The first entry is the address and length
+		  of the controller register set. The optional second entry is the address
+		  and length of the area where the nor flash is mapped to.
 - clocks: 	  the phandle of the clocks needed by the nor controller
 - clock-names: 	  the names of the clocks
 		  the clocks should be named "spi" and "sf". "spi" is used for spi bus,
@@ -48,3 +51,19 @@ nor_flash: spi@...0d000 {
 	};
 };
 
+nor_flash: spi@...14000 {
+	compatible = "mediatek,mt7629-nor",
+		     "mediatek,mt8173-nor";
+	reg = <0x11014000 0xe0>,
+	      <0x30000000 0x10000000>;
+	clocks = <&pericfg CLK_PERI_FLASH_PD>,
+		 <&topckgen CLK_TOP_FLASH_SEL>;
+	clock-names = "spi", "sf";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+	};
+};
-- 
2.21.0