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.xu@rock-chips.com Reviewed-by: Doug Anderson dianders@chromium.org --- 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..c8f5ac0 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>; };