linux-kernel - RE: [PATCH 2/4] arm64: dts: imx8mn: add spba bus node

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Date:   Wed, 30 Dec 2020 02:34:06 +0000
From:   Peng Fan <peng.fan@....com>
To:     Krzysztof Kozlowski <krzk@...nel.org>,
        Adam Ford <aford173@...il.com>,
        "S.j. Wang" <shengjiu.wang@....com>
CC:     Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>,
        Sascha Hauer <kernel@...gutronix.de>,
        arm-soc <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH 2/4] arm64: dts: imx8mn: add spba bus node

> Subject: Re: [PATCH 2/4] arm64: dts: imx8mn: add spba bus node
> 
> On Tue, Dec 29, 2020 at 06:26:41AM -0600, Adam Ford wrote:
> > On Tue, Dec 29, 2020 at 6:15 AM <peng.fan@....com> wrote:
> > >
> > > From: Peng Fan <peng.fan@....com>
> > >
> > > According to RM, there is a spba bus inside aips3 and aips1, add it.
> > >
> > > Signed-off-by: Peng Fan <peng.fan@....com>
> > > ---
> > >  arch/arm64/boot/dts/freescale/imx8mm.dtsi | 362
> > > +++++++++++-----------
> > >  1 file changed, 189 insertions(+), 173 deletions(-)
> > >
> > > diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> > > b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> > > index c824f2615fe8..91f85b8cee9a 100644
> > > --- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> > > +++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> > > @@ -269,117 +269,125 @@ aips1: bus@...00000 {
> > >                         #size-cells = <1>;
> > >                         ranges = <0x30000000 0x30000000
> 0x400000>;
> > >
> > > -                       sai1: sai@...10000 {
> > > -                               #sound-dai-cells = <0>;
> > > -                               compatible = "fsl,imx8mm-sai",
> "fsl,imx8mq-sai";
> > > -                               reg = <0x30010000 0x10000>;
> > > -                               interrupts = <GIC_SPI 95
> IRQ_TYPE_LEVEL_HIGH>;
> > > -                               clocks = <&clk
> IMX8MM_CLK_SAI1_IPG>,
> > > -                                        <&clk
> IMX8MM_CLK_SAI1_ROOT>,
> > > -                                        <&clk
> IMX8MM_CLK_DUMMY>, <&clk IMX8MM_CLK_DUMMY>;
> > > -                               clock-names = "bus", "mclk1",
> "mclk2", "mclk3";
> > > -                               dmas = <&sdma2 0 2 0>, <&sdma2
> 1 2 0>;
> > > -                               dma-names = "rx", "tx";
> > > -                               status = "disabled";
> > > -                       };
> > > +                       bus@...00000 {
> >
> > There is already a bus@...00000 (aips1), and I think the system
> > doesn't like it when there are multiple busses with the same name.
> >
> > There was some discussion on fixing the 8mn [1], but it doesn't look
> > like it went anywhere.
> >
> > I am guessing the Mini will need something similar to the nano.
> >
> > [1] -
> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatc
> >
> hwork.kernel.org%2Fproject%2Flinux-arm-kernel%2Fpatch%2F1607324004-1
> 29
> >
> 60-1-git-send-email-shengjiu.wang%40nxp.com%2F&amp;data=04%7C01%7
> Cpeng
> > .fan%40nxp.com%7C970d320f3ef7413296ed08d8ac1486f9%7C686ea1d3bc
> 2b4c6fa9
> >
> 2cd99c5c301635%7C0%7C0%7C637448551481206715%7CUnknown%7CTW
> FpbGZsb3d8ey
> >
> JWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D
> %7C200
> >
> 0&amp;sdata=xKgYHCDyitbUyTPKVuwQV%2FCoJvepCbdBJ1MD9vP%2B6MY
> %3D&amp;res
> > erved=0
> 
> Several replies from S.j. Wang are missing from LKML (and maybe
> patchwork?) but we reached a conclusion:

Thanks for the pointing, I'll give a look. If S.J take it, I'll leave it to S.J.

Thanks,
Peng. 

> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.ke
> rnel.org%2Flinux-arm-kernel%2F20201208090601.GA8347%40kozik-lap%2F&
> amp;data=04%7C01%7Cpeng.fan%40nxp.com%7C970d320f3ef7413296ed08
> d8ac1486f9%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C63744
> 8551481206715%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiL
> CJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;sdata=nk
> t0J5RtzA%2B29nK4aPnd434FNQV8MUZ%2F8Aq64o6hl6I%3D&amp;reserved
> =0
> 
> Either you do some remapping of address space or just rename the "bus"
> nodes (e.g. generic bus-1 or a specific spba-bus).
> 
> Best regards,
> Krzysztof