[PATCH V3 2/3] arm64: dts: imx8mp: Add micfil node

[Marek Vasut]

On 9/1/23 13:06, Adam Ford wrote:
> On Thu, Aug 31, 2023 at 4:53 PM Marek Vasut <marex at denx.de> wrote:
>>
>> On 8/31/23 06:44, Adam Ford wrote:
>>> The i.MX8MP has a micfil controller which is used for interfacing
>>> with a pulse density microphone. Add the node and mark it as
>>> disabled by default.
>>>
>>> Signed-off-by: Adam Ford <aford173 at gmail.com>
>>> ---
>>> V3:  The AUDIOMIX_PDM_ROOT doesn't exist and the real clock is
>>>        called IMX8MP_CLK_AUDIOMIX_PDM_SEL, so swap it out.
>>>
>>> V2:  No change
>>>
>>> diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
>>> index 3167706d81e1..341fd0369ce9 100644
>>> --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
>>> +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
>>> @@ -1479,6 +1479,27 @@ easrc: easrc at 30c90000 {
>>>                                        fsl,asrc-format = <2>;
>>>                                        status = "disabled";
>>>                                };
>>> +
>>> +                             micfil: audio-controller at 30ca0000 {
>>> +                                     compatible = "fsl,imx8mp-micfil";
>>> +                                     reg = <0x30ca0000 0x10000>;
>>> +                                     #sound-dai-cells = <0>;
>>> +                                     interrupts = <GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>,
>>> +                                                  <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>,
>>> +                                                  <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>,
>>> +                                                  <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
>>> +                                     clocks = <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_PDM_IPG>,
>>> +                                              <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_PDM_SEL>,
>>> +                                              <&clk IMX8MP_AUDIO_PLL1_OUT>,
>>> +                                              <&clk IMX8MP_AUDIO_PLL2_OUT>,
>>> +                                              <&clk IMX8MP_CLK_EXT3>;
>>> +                                     clock-names = "ipg_clk", "ipg_clk_app",
>>> +                                                   "pll8k", "pll11k", "clkext3";
>>> +                                     dmas = <&sdma2 24 25 0x80000000>;
>>> +                                     dma-names = "rx";
>>
>> Is dma-names really required if there is only a single DMA channel in DT ?
> 
> I would normally agree with you, the DT binding file shows it's
> required, and the driver looks like it's searching for a channel name
> called 'rx'

Maybe something that can be improved both in the driver and bindings ?