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

Adam Ford
2023-09-01T11:07:45Z

On Thu, Aug 31, 2023 at 4:53 PM Marek Vasut <marex@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@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@30c90000 {
> > fsl,asrc-format = <2>;
> > status = "disabled";
> > };
> > +
> > + micfil: audio-controller@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'

adam