Add "rockchip,grf" for driver to get physical address of GRF, and "rockchip,grf-io-vsel"
for driver to set voltage for I2S controller according to hardware request.
Requested by rk3xxx I2S controller and tested ok on rk3288-pinky board.
Change-Id: I2587d15c25e64c569857369326653d8a450bae19
Signed-off-by: Jianqun <jay.xu@xxxxxxxxxxxxxx>
---
Documentation/devicetree/bindings/sound/rockchip-i2s.txt | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/sound/rockchip-i2s.txt b/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
index 6c55fcf..b995fe6 100644
--- a/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
+++ b/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
@@ -9,6 +9,8 @@ Required properties:
- "rockchip,rk3066-i2s": for rk3066
- "rockchip,rk3188-i2s", "rockchip,rk3066-i2s": for rk3188
- "rockchip,rk3288-i2s", "rockchip,rk3066-i2s": for rk3288
+- rockchip,grf: physical base address of GRF.
+- rockchip,grf-io-vsel: select this if I2S controller powerd by 1.8v.
- reg: physical base address of the controller and length of memory mapped
region.
- interrupts: should contain the I2S interrupt.
@@ -26,12 +28,14 @@ Example for rk3288 I2S controller:
i2s@ff890000 {
compatible = "rockchip,rk3288-i2s", "rockchip,rk3066-i2s";
+ rockchip,grf = <&grf>;
+ rockchip,grf-io-vsel;
reg = <0xff890000 0x10000>;
interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>;
#address-cells = <1>;
#size-cells = <0>;
dmas = <&pdma1 0>, <&pdma1 1>;
- dma-names = "rx", "tx";
+ dma-names = "tx", "rx";
clock-names = "i2s_hclk", "i2s_clk";
clocks = <&cru HCLK_I2S0>, <&cru SCLK_I2S0>;
};
--
1.8.3.2
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