spi: sun6i: Add binding for Allwinner H3 SPI controller

H3 SPI has same architecture as A31 except FIFO capacity.
To configure the buffer size separately, compatible property should be
different. Optional DMA specifiers and example are added.

Signed-off-by: Milo Kim <woogyom.kim@gmail.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/spi/spi-sun6i.txt b/Documentation/devicetree/bindings/spi/spi-sun6i.txt
index 21de73db6a05fc5c97df2375c1ce87117fc98c3a..2ec99b86b62297ab9793e143e137982ca6b3c11d 100644 (file)
--- a/Documentation/devicetree/bindings/spi/spi-sun6i.txt
+++ b/Documentation/devicetree/bindings/spi/spi-sun6i.txt
@@ -1,7 +1,7 @@
-Allwinner A31 SPI controller
+Allwinner A31/H3 SPI controller
 
 Required properties:
-- compatible: Should be "allwinner,sun6i-a31-spi".
+- compatible: Should be "allwinner,sun6i-a31-spi" or "allwinner,sun8i-h3-spi".
 - reg: Should contain register location and length.
 - interrupts: Should contain interrupt.
 - clocks: phandle to the clocks feeding the SPI controller. Two are
@@ -12,6 +12,11 @@ Required properties:
 - resets: phandle to the reset controller asserting this device in
           reset
 
+Optional properties:
+- dmas: DMA specifiers for rx and tx dma. See the DMA client binding,
+       Documentation/devicetree/bindings/dma/dma.txt
+- dma-names: DMA request names should include "rx" and "tx" if present.
+
 Example:
 
 spi1: spi@01c69000 {
@@ -22,3 +27,19 @@ spi1: spi@01c69000 {
        clock-names = "ahb", "mod";
        resets = <&ahb1_rst 21>;
 };
+
+spi0: spi@01c68000 {
+       compatible = "allwinner,sun8i-h3-spi";
+       reg = <0x01c68000 0x1000>;
+       interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>;
+       clocks = <&ccu CLK_BUS_SPI0>, <&ccu CLK_SPI0>;
+       clock-names = "ahb", "mod";
+       dmas = <&dma 23>, <&dma 23>;
+       dma-names = "rx", "tx";
+       pinctrl-names = "default";
+       pinctrl-0 = <&spi0_pins>;
+       resets = <&ccu RST_BUS_SPI0>;
+       status = "disabled";
+       #address-cells = <1>;
+       #size-cells = <0>;
+};