new file mode 100644
@@ -0,0 +1,98 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/rockchip,rk3308-codec.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip RK3308 Internal Codec
+
+description: |
+ This is the audio codec embedded in the Rockchip RK3308
+ SoC. It has 8 24-bit ADCs and 2 24-bit DACs. The maximum supported
+ sampling rate is 192 kHz.
+
+ It is connected internally to one out of a selection of the internal I2S
+ controllers.
+
+ The RK3308 audio codec has 8 independent capture channels, but some
+ features work on stereo pairs called groups:
+ * grp 0 -- MIC1 / MIC2
+ * grp 1 -- MIC3 / MIC4
+ * grp 2 -- MIC5 / MIC6
+ * grp 3 -- MIC7 / MIC8
+
+maintainers:
+ - Luca Ceresoli <luca.ceresoli@bootlin.com>
+
+properties:
+ compatible:
+ const: rockchip,rk3308-codec
+
+ reg:
+ maxItems: 1
+
+ rockchip,grf:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description:
+ Phandle to the General Register Files (GRF)
+
+ clocks:
+ items:
+ - description: clock for TX
+ - description: clock for RX
+ - description: AHB clock driving the interface
+
+ clock-names:
+ items:
+ - const: mclk_tx
+ - const: mclk_rx
+ - const: hclk
+
+ resets:
+ maxItems: 1
+
+ reset-names:
+ items:
+ - const: codec
+
+ "#sound-dai-cells":
+ const: 0
+
+ rockchip,micbias-avdd-percent:
+ description: |
+ Voltage setting for the MICBIAS pins expressed as a percentage of
+ AVDD.
+
+ E.g. if rockchip,micbias-avdd-percent = 85 and AVDD = 3v3, then the
+ MIC BIAS voltage will be 3.3 V * 85% = 2.805 V.
+
+ enum: [ 50, 55, 60, 65, 70, 75, 80, 85 ]
+
+required:
+ - compatible
+ - reg
+ - rockchip,grf
+ - clocks
+ - resets
+ - "#sound-dai-cells"
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/rk3308-cru.h>
+
+ audio-codec: audio-codec@ff560000 {
+ compatible = "rockchip,rk3308-codec";
+ reg = <0xff560000 0x10000>;
+ rockchip,grf = <&grf>;
+ clock-names = "mclk_tx", "mclk_rx", "hclk";
+ clocks = <&cru SCLK_I2S2_8CH_TX_OUT>,
+ <&cru SCLK_I2S2_8CH_RX_OUT>,
+ <&cru PCLK_ACODEC>;
+ reset-names = "codec";
+ resets = <&cru SRST_ACODEC_P>;
+ #sound-dai-cells = <0>;
+ };
+
+...
@@ -18669,6 +18669,11 @@ S: Maintained
F: Documentation/devicetree/bindings/media/rockchip-rga.yaml
F: drivers/media/platform/rockchip/rga/
+ROCKCHIP RK3308 INTERNAL AUDIO CODEC
+M: Luca Ceresoli <luca.ceresoli@bootlin.com>
+S: Maintained
+F: Documentation/devicetree/bindings/sound/rockchip,rk3308-codec.yaml
+
ROCKCHIP VIDEO DECODER DRIVER
M: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
L: linux-media@vger.kernel.org
Add device tree bindings document for the internal audio codec of the Rockchip RK3308 SoC. Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> --- Changed in v2: - reword commit title - add maxItems to resets - remove quotes from reset-names - use percent values for rockchip,micbias-avdd-multiplier - use name compliant to the docs in the example --- .../bindings/sound/rockchip,rk3308-codec.yaml | 98 ++++++++++++++++++++++ MAINTAINERS | 5 ++ 2 files changed, 103 insertions(+)