[PATCH 1/2] rockchip-i2s: dt: add grf requested properties to set power of I2S controller

[Jianqun <jay.xu@rock-chips.com>]

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@rock-chips.com>
---
 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