This patch updates the samsung i2s documentation for pinmux and
clock entries.
Signed-off-by: Padmavathi Venna <padma.v@xxxxxxxxxxx>
---
.../devicetree/bindings/sound/samsung-i2s.txt | 46 ++++++++-----------
1 files changed, 19 insertions(+), 27 deletions(-)
diff --git a/Documentation/devicetree/bindings/sound/samsung-i2s.txt b/Documentation/devicetree/bindings/sound/samsung-i2s.txt
index 3070046..025e66b 100644
--- a/Documentation/devicetree/bindings/sound/samsung-i2s.txt
+++ b/Documentation/devicetree/bindings/sound/samsung-i2s.txt
@@ -8,6 +8,16 @@ Required SoC Specific Properties:
- dmas: list of DMA controller phandle and DMA request line ordered pairs.
- dma-names: identifier string for each DMA request line in the dmas property.
These strings correspond 1:1 with the ordered pairs in dmas.
+- clocks: Handle to iis clock and RCLK source clk.
+- clock-names:
+ i2s0 uses some base clks from CMU and some are from audio subsystem internal
+ clock controller. The clock names for i2s0 should be "iis", "i2s_opclk0" and
+ "i2s_opclk1" as shown in the example below.
+ i2s1 and i2s2 uses clocks from CMU. The clock names for i2s1 and i2s2 should
+ be "iis" and "i2s_opclk0".
+ "iis" is the i2s bus clock and i2s_opclk0, i2s_opclk1 are sources of the root
+ clk. i2s0 has internal mux to select the source of root clk and i2s1 and i2s2
+ doesn't have any such mux.
Optional SoC Specific Properties:
@@ -20,44 +30,26 @@ Optional SoC Specific Properties:
then this flag is enabled.
- samsung,idma-addr: Internal DMA register base address of the audio
sub system(used in secondary sound source).
-
-Required Board Specific Properties:
-
-- gpios: The gpio specifier for data out,data in, LRCLK, CDCLK and SCLK
- interface lines. The format of the gpio specifier depends on the gpio
- controller.
- The syntax of samsung gpio specifier is
- <[phandle of the gpio controller node]
- [pin number within the gpio controller]
- [mux function]
- [flags and pull up/down]
- [drive strength]>
+- pinctrl-0: Should specify pin control groups used for this controller.
+- pinctrl-names: Should contain only one value - "default".
Example:
-- SoC Specific Portion:
-
-i2s@03830000 {
+i2s0: i2s@03830000 {
compatible = "samsung,i2s-v5";
reg = <0x03830000 0x100>;
dmas = <&pdma0 10
&pdma0 9
&pdma0 8>;
dma-names = "tx", "rx", "tx-sec";
+ clocks = <&clock_audss EXYNOS_I2S_BUS>,
+ <&clock_audss EXYNOS_I2S_BUS>,
+ <&clock_audss EXYNOS_SCLK_I2S>;
+ clock-names = "iis", "i2s_opclk0", "i2s_opclk1";
samsung,supports-6ch;
samsung,supports-rstclr;
samsung,supports-secdai;
samsung,idma-addr = <0x03000000>;
-};
-
-- Board Specific Portion:
-
-i2s@03830000 {
- gpios = <&gpz 0 2 0 0>, /* I2S_0_SCLK */
- <&gpz 1 2 0 0>, /* I2S_0_CDCLK */
- <&gpz 2 2 0 0>, /* I2S_0_LRCK */
- <&gpz 3 2 0 0>, /* I2S_0_SDI */
- <&gpz 4 2 0 0>, /* I2S_0_SDO[1] */
- <&gpz 5 2 0 0>, /* I2S_0_SDO[2] */
- <&gpz 6 2 0 0>; /* I2S_0_SDO[3] */
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2s0_bus>;
};
--
1.7.4.4
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