Re: [PATCH v5] ASoC: rockchip: Add machine driver for RK3399 GRU Boards

Because we need to support the multiple codecs (MAX98357A/RT5514/DA7219)
on the RK3399 GRU boards, this patch can help us to support these codecs.

Signed-off-by: Xing Zheng <redacted>
---

Changes in v5:
- fix the build warning for missing I2C/CLKDEV_LOOKUP dependency

Changes in v4:
- the compatible name needs to be based on a single reference design,
  and the name of the board is called "GRU"
- use one i2sX card "rockchip,cpu = <&i2s0>" instead of array that is
  based on GRU
- rename DOC to rockchip,rk3399-gru-sound.txt
- rename compatible to rockchip,rk3399-gru-sound
- rename source code to rk3399_gru_sound.c

Changes in v3:
- rename DOC to rockchip,rk3399-max98357a-rt5514-da7219.txt
- rename compatible to rockchip,rk3399-max98357a-rt5514-da7219
- rename source code to rk3399_max98357a_rt5514_da7219.c

Changes in v2:
- use the FS 256 to set mclks of the max98357a and rt5514 danamically
- add more sample rate for da7219

 .../bindings/sound/rockchip,rk3399-gru-sound.txt   |   15 +
 sound/soc/rockchip/Kconfig                         |   11 +
 sound/soc/rockchip/Makefile                        |    2 +
 sound/soc/rockchip/rk3399_gru_sound.c              |  339 ++++++++++++++++++++
 4 files changed, 367 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/rockchip,rk3399-gru-sound.txt
 create mode 100644 sound/soc/rockchip/rk3399_gru_sound.c

diff --git a/Documentation/devicetree/bindings/sound/rockchip,rk3399-gru-sound.txt b/Documentation/devicetree/bindings/sound/rockchip,rk3399-gru-sound.txt
new file mode 100644
index 0000000..f19b6c8
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/rockchip,rk3399-gru-sound.txt

@@ -0,0 +1,15 @@
+ROCKCHIP with MAX98357A/RT5514/DA7219 codecs on GRU boards
+
+Required properties:
+- compatible: "rockchip,rk3399-gru-sound"
+- rockchip,cpu: The phandle of the Rockchip I2S controller that's
+  connected to the codecs
+- rockchip,codec: The phandle of the MAX98357A/RT5514/DA7219 codecs
+
+Example:
+
+sound {
+	compatible = "rockchip,rk3399-gru-sound";
+	rockchip,cpu = <&i2s0>;
+	rockchip,codec = <&max98357a &rt5514 &da7219>;