similarity index 75%
rename from Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
rename to Documentation/devicetree/bindings/spi/spi-mtk-nor.txt
@@ -1,4 +1,4 @@
-* Serial NOR flash controller for MediaTek SoCs
+* Serial NOR flash controller for MediaTek ARM SoCs
Required properties:
- compatible: For mt8173, compatible should be "mediatek,mt8173-nor",
@@ -13,6 +13,7 @@ Required properties:
"mediatek,mt7629-nor", "mediatek,mt8173-nor"
"mediatek,mt8173-nor"
- reg: physical base address and length of the controller's register
+- interrupts: Interrupt number used by the controller.
- 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,
@@ -22,20 +23,16 @@ Required properties:
- #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
+There should be only one spi slave device following generic spi bindings.
+It's not recommended to use this controller for devices other than SPI NOR
+flash due to limited transfer capability of this controller.
Example:
nor_flash: spi@1100d000 {
compatible = "mediatek,mt8173-nor";
reg = <0 0x1100d000 0 0xe0>;
+ interrupts = <&spi_flash_irq>;
clocks = <&pericfg CLK_PERI_SPI>,
<&topckgen CLK_TOP_SPINFI_IFR_SEL>;
clock-names = "spi", "sf";
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> --- Change since v2: revert binding example replacement and add a dummy irq binding Change since v1: none .../{mtd/mtk-quadspi.txt => spi/spi-mtk-nor.txt} | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) rename Documentation/devicetree/bindings/{mtd/mtk-quadspi.txt => spi/spi-mtk-nor.txt} (75%)