Signed-off-by: Leilk Liu <leilk.liu@xxxxxxxxxxxx>
---
Change in this patch:
1. change this patch title.
2. change "MTK SPI device" to "MTK SPI controller".
3. "pad-select" is a vendor property, so change it to "mediatek,pad-select".
4. modify the property of clock and clock name.
5. explain what the pad-select values 0-3 mean.
---
.../devicetree/bindings/spi/spi-mt65xx.txt | 51 ++++++++++++++++++++++
1 file changed, 51 insertions(+)
create mode 100644 Documentation/devicetree/bindings/spi/spi-mt65xx.txt
diff --git a/Documentation/devicetree/bindings/spi/spi-mt65xx.txt b/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
new file mode 100644
index 0000000..dcefc43
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
@@ -0,0 +1,51 @@
+Binding for MTK SPI controller
+
+Required properties:
+- compatible: should be one of the following.
+ - mediatek,mt8173-spi: for mt8173 platforms
+ - mediatek,mt8135-spi: for mt8135 platforms
+ - mediatek,mt6589-spi: for mt6589 platforms
+
+- #address-cells: should be 1.
+
+- #size-cells: should be 0.
+
+- reg: Address and length of the register set for the device
+
+- interrupts: Should contain spi interrupt
+
+- clocks: phandles to input clocks.
+ The first should be <&topckgen CLK_TOP_SPI_SEL>.
+ The second should be one of the following.
+ - <&clk26m>: specify parent clock 26MHZ.
+ - <&topckgen CLK_TOP_SYSPLL3_D2>: specify parent clock 109MHZ.
+ It's the default one.
+ - <&topckgen CLK_TOP_SYSPLL4_D2>: specify parent clock 78MHZ.
+ - <&topckgen CLK_TOP_UNIVPLL2_D4>: specify parent clock 104MHZ.
+ - <&topckgen CLK_TOP_UNIVPLL1_D8>: specify parent clock 78MHZ.
+
+- clock-names: shall be "spi-clk" for the controller clock, and
+ "parent-clk" for the parent clock.
+
+Optional properties:
+- mediatek,pad-select: specify which pins group(ck/mi/mo/cs) spi
+ controller used, this value should be 0~3, only required for MT8173.
+ 0: specify GPIO69,70,71,72 for spi pins.
+ 1: specify GPIO102,103,104,105 for spi pins.
+ 2: specify GPIO128,129,130,131 for spi pins.
+ 3: specify GPIO5,6,7,8 for spi pins.
+
+Example:
+
+- SoC Specific Portion:
+spi: spi@1100a000 {
+ compatible = "mediatek,mt8173-spi";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0 0x1100a000 0 0x1000>;
+ interrupts = <GIC_SPI 110 IRQ_TYPE_LEVEL_LOW>;
+ clocks = <&topckgen CLK_TOP_SPI_SEL>, <&topckgen CLK_TOP_SYSPLL3_D2>;
+ clock-names = "spi-clk", "parent-clk";
+ mediatek,pad-select = <0>;
+ status = "disabled";
+};
--
1.8.1.1.dirty
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