Add an property "i2s_clk_out", which enables to output clock to outside
of rockchip SoCs. Let's make it optional since not each board needs it.
Signed-off-by: Jianqun Xu <jay...@rock-chips.com>
---
changes since v1:
- make "i2s_clk_out" optional, suggested by Sonny
Documentation/devicetree/bindings/sound/rockchip-i2s.txt | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
b/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
index 9b82c20..6dedd0d 100644
--- a/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
+++ b/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
@@ -22,6 +22,10 @@ Required properties:
- "i2s_hclk": clock for I2S BUS
- "i2s_clk" : clock for I2S controller
+Optional property:
+ - "i2s_clk_out" : clock output to outside of chip, usally as master clock
for audio
+ codec chip
+
Example for rk3288 I2S controller:
i2s@ff890000 {
@@ -32,6 +36,6 @@ i2s@ff890000 {
#size-cells = <0>;
dmas = <&pdma1 0>, <&pdma1 1>;
dma-names = "tx", "rx";
- clock-names = "i2s_hclk", "i2s_clk";
- clocks = <&cru HCLK_I2S0>, <&cru SCLK_I2S0>;
+ clock-names = "i2s_hclk", "i2s_clk", "i2s_clk_out";
+ clocks = <&cru HCLK_I2S0>, <&cru SCLK_I2S0>, <&cru SCLK_I2S0_CLKOUT>;
};
--
1.9.1
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