dt-bindings: convert mtk-quadspi binding doc for spi-mtk-nor

spi-mtk-nor is a driver to replace mtk-quadspi and they have almost
the same device-tree bindings. Reuse this binding documentation and
convert it for new driver:

1. "Mediatek SoCs" -> "Mediatek ARM SoCs" because MTK MIPS SoCs
   use different controllers.
2. document "interrupts" as a required property because it's
   available on all SoCs with this controller and new driver takes
   advantages of it. It's implemented as optional only to maintain
   backward compatibility.
3. add a dummy interrupt binding in example.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
Link: https://lore.kernel.org/r/20200306085052.28258-4-gch981213@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 0 insertions, 50 deletions

diff --git a/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt b/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
deleted file mode 100644
index a12e3b5c495d..000000000000
--- a/Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
+++ /dev/null
@@ -1,50 +0,0 @@
-* Serial NOR flash controller for MediaTek SoCs
-
-Required properties:
-- compatible: 	  For mt8173, compatible should be "mediatek,mt8173-nor",
-		  and it's the fallback compatible for other Soc.
-		  For every other SoC, should contain both the SoC-specific compatible
-		  string and "mediatek,mt8173-nor".
-		  The possible values are:
-		  "mediatek,mt2701-nor", "mediatek,mt8173-nor"
-		  "mediatek,mt2712-nor", "mediatek,mt8173-nor"
-		  "mediatek,mt7622-nor", "mediatek,mt8173-nor"
-		  "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
-- 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,
-		  and "sf" is used for controller, these are the clocks witch
-		  hardware needs to enabling nor flash and nor flash controller.
-		  See Documentation/devicetree/bindings/clock/clock-bindings.txt for details.
-- #address-cells: should be <1>
-- #size-cells:	  should be <0>
-
-The SPI flash must be a child of the nor_flash node and must have a
-compatible property. Also see jedec,spi-nor.txt.
-
-Required properties:
-- compatible:	  May include a device-specific string consisting of the manufacturer
-		  and name of the chip. Must also include "jedec,spi-nor" for any
-		  SPI NOR flash that can be identified by the JEDEC READ ID opcode (0x9F).
-- reg :		  Chip-Select number
-
-Example:
-
-nor_flash: spi@1100d000 {
-	compatible = "mediatek,mt8173-nor";
-	reg = <0 0x1100d000 0 0xe0>;
-	clocks = <&pericfg CLK_PERI_SPI>,
-		 <&topckgen CLK_TOP_SPINFI_IFR_SEL>;
-	clock-names = "spi", "sf";
-	#address-cells = <1>;
-	#size-cells = <0>;
-
-	flash@0 {
-		compatible = "jedec,spi-nor";
-		reg = <0>;
-	};
-};
-