@@ -11,8 +11,11 @@ maintainers:
description: |
fsl_rpmsg is a virtual audio device. Mapping to real hardware devices
- are SAI, DMA controlled by Cortex M core. What we see from Linux
- side is a device which provides audio service by rpmsg channel.
+ are SAI, MICFIL, DMA controlled by Cortex M core. What we see from
+ Linux side is a device which provides audio service by rpmsg channel.
+ We can create different sound cards which access different hardwares
+ such as SAI, MICFIL, .etc through building rpmsg channels between
+ Cortex-A and Cortex-M.
properties:
compatible:
@@ -85,6 +88,16 @@ properties:
This is a boolean property. If present, the receiving function
will be enabled.
+ fsl,rpmsg-channel-name:
+ $ref: /schemas/types.yaml#/definitions/string
+ description: |
+ A string property to assign rpmsg channel this sound card sits on.
+ This property can be omitted if there is only one sound card and it sits
+ on "rpmsg-audio-channel".
+ enum:
+ - rpmsg-audio-channel
+ - rpmsg-micfil-channel
+
required:
- compatible
- model
@@ -107,3 +120,22 @@ examples:
<&clk IMX8MN_AUDIO_PLL2_OUT>;
clock-names = "ipg", "mclk", "dma", "pll8k", "pll11k";
};
+
+ - |
+ #include <dt-bindings/clock/imx8mm-clock.h>
+
+ rpmsg_micfil: audio-controller {
+ compatible = "fsl,imx8mm-rpmsg-audio";
+ model = "micfil-audio";
+ fsl,rpmsg-channel-name = "rpmsg-micfil-channel";
+ fsl,enable-lpa;
+ fsl,rpmsg-in;
+ clocks = <&clk IMX8MM_CLK_PDM_IPG>,
+ <&clk IMX8MM_CLK_PDM_ROOT>,
+ <&clk IMX8MM_CLK_SDMA3_ROOT>,
+ <&clk IMX8MM_AUDIO_PLL1_OUT>,
+ <&clk IMX8MM_AUDIO_PLL2_OUT>;
+ clock-names = "ipg", "mclk", "dma", "pll8k", "pll11k";
+ };
+
+...
Add a string property to assign the rpmsg channel this sound card sits on. This property can be omitted if there is only one sound card and it sits on "rpmsg-audio-channel". Signed-off-by: Chancel Liu <chancel.liu@nxp.com> --- .../devicetree/bindings/sound/fsl,rpmsg.yaml | 36 +++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-)