On Sat, Oct 31, 2020 at 9:03 PM Shawn Guo <shawnguo@xxxxxxxxxx> wrote:
>
> On Mon, Oct 19, 2020 at 12:45:24PM -0500, Adam Ford wrote:
> > The driver exists for the Enhanced Asynchronous Sample Rate Converter
> > (EASRC) Controller, but there isn't a device tree entry for it.
> >
> > On the vendor kernel, they put this on a spba-bus for SDMA support.
> >
> > Add the the node for the spba-bus with the easrc node inside.
> >
> > Signed-off-by: Adam Ford <aford173@xxxxxxxxx>
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mn.dtsi b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> > index 746faf1cf2fb..7d34281332e1 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> > @@ -246,6 +246,34 @@ aips1: bus@30000000 {
> > #size-cells = <1>;
> > ranges;
> >
> > + spba-bus@30000000 {
>
> spba: bus@30000000
Go ahead and disregard my V2. I'll submit a V3. I sent the V2 before
I got this feedback.
>
> > + compatible = "fsl,spba-bus", "simple-bus";
>
> "fsl,spba-bus" is undocumented. Document it or drop it.
I just submitted a patch to document this bus. It's used on a bunch
of imx boards, so I think it's important to document it.
I assigned you as the maintainer of the binding doc since you're
listed as the maintainer of the SDMA driver which is what's using
the compatible flag. I hope that is the correct thing to do.
>
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + reg = <0x30000000 0x100000>;
> > + ranges;
> > +
> > + easrc: easrc@300C0000 {
> > + compatible = "fsl,imx8mn-easrc";
> > + reg = <0x300C0000 0x10000>;
> > + interrupts = <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>;
> > + clocks = <&clk IMX8MN_CLK_ASRC_ROOT>;
> > + clock-names = "mem";
> > + dmas = <&sdma2 16 23 0> , <&sdma2 17 23 0>,
> > + <&sdma2 18 23 0> , <&sdma2 19 23 0>,
> > + <&sdma2 20 23 0> , <&sdma2 21 23 0>,
> > + <&sdma2 22 23 0> , <&sdma2 23 23 0>;
> > + dma-names = "ctx0_rx", "ctx0_tx",
> > + "ctx1_rx", "ctx1_tx",
> > + "ctx2_rx", "ctx2_tx",
> > + "ctx3_rx", "ctx3_tx";
> > + fsl,easrc-ram-script-name = "imx/easrc/easrc-imx8mn.bin";
>
> Undocumented property?
That's my fault. I accidentally copied the device tree entry from the
vendor kernel instead of using the naming from the device tree binding
document.
I fixed this in my V2, but I need to send a V3 anyway.
adam
>
> Shawn
>
> > + fsl,asrc-rate = <8000>;
> > + fsl,asrc-width = <16>;
> > + status = "disabled";
> > + };
> > + };
> > +
> > gpio1: gpio@30200000 {
> > compatible = "fsl,imx8mn-gpio", "fsl,imx35-gpio";
> > reg = <0x30200000 0x10000>;
> > --
> > 2.25.1
> >
