linux-kernel - Re: [PATCH 2/2] arch: arm64: dts: Add support for AM69 Starter Kit

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Date:   Wed, 25 Jan 2023 18:44:07 +0530
From:   Dasnavis Sabiya <sabiya.d@...tralsolutions.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     nm@...com, Vignesh Raghavendra <vigneshr@...com>,
        kristo@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, linus.walleij@...aro.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Dasnavis Sabiya <sabiya.d@...com>
Subject: Re: [PATCH 2/2] arch: arm64: dts: Add support for AM69 Starter Kit

Hi Krzysztof,

On Mon, Jan 23, 2023 at 12:58 PM Dasnavis Sabiya
<sabiya.d@...tralsolutions.com> wrote:
>
> Hi Krzysztof,
>
> On Fri, Jan 20, 2023 at 4:03 PM Vignesh Raghavendra <vigneshr@...com> wrote:
> >
> > Hi Krzysztof,
> >
> > On 19/01/23 19:06, Krzysztof Kozlowski wrote:
> > > On 19/01/2023 14:29, sabiya.d@...tralsolutions.com wrote:
> > >> From: Dasnavis Sabiya <sabiya.d@...com>
> > >>
> > >> AM69 Starter Kit is a single board designed for TI AM69 SOC that
> > >> provides advanced system integration in automotive ADAS applications,
> > >> autonomous mobile robot and edge AI applications. The SOC comprises
> > >> of Cortex-A72s in dual clusters, lockstep capable dual Cortex-R5F MCUs,
> > >> Vision Processing Accelerators (VPAC) with Image Signal Processor (ISP)
> > >> and multiple vision assist accelerators, Depth and Motion Processing
> > >> Accelerators (DMPAC), Deep-learning Matrix Multiply Accelerator(MMA)
> > >> and C7x floating point vector DSP
> > >>
> > >> AM69 SK supports the following interfaces:
> > >>        * 32 GB LPDDR4 RAM
> > >>        * x1 Gigabit Ethernet interface
> > >>        * x3 USB 3.0 Type-A ports
> > >>        * x1 USB 3.0 Type-C port
> > >>        * x1 UHS-1 capable micro-SD card slot
> > >>        * x4 MCAN instances
> > >>        * 32 GB eMMC Flash
> > >>        * 512 Mbit OSPI flash
> > >>        * x2 Display connectors
> > >>        * x1 PCIe M.2 M Key
> > >>        * x1 PCIe M.2 E Key
> > >>        * x1 4L PCIe Card Slot
> > >>        * x3 CSI2 Camera interface
> > >>        * 40-pin Raspberry Pi header
> > >>
> > >> Add initial support for the AM69 SK board.
> > >
> > > Thank you for your patch. There is something to discuss/improve.
> > >
> > >>
> > >> Design Files: https://www.ti.com/lit/zip/SPRR466
> > >> TRM: https://www.ti.com/lit/zip/spruj52
> > >>
> > >> Signed-off-by: Dasnavis Sabiya <sabiya.d@...com>
> > >> ---
> > >>  arch/arm64/boot/dts/ti/Makefile       |   1 +
> > >>  arch/arm64/boot/dts/ti/k3-am69-sk.dts | 180 ++++++++++++++++++++++++++
> > >>  2 files changed, 181 insertions(+)
> > >>  create mode 100644 arch/arm64/boot/dts/ti/k3-am69-sk.dts
> > >>
> > >> diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
> > >> index e7c2c7dd0b25..04b1a7611096 100644
> > >> --- a/arch/arm64/boot/dts/ti/Makefile
> > >> +++ b/arch/arm64/boot/dts/ti/Makefile
> > >> @@ -20,6 +20,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-j7200-common-proc-board.dtb
> > >>
> > >>  dtb-$(CONFIG_ARCH_K3) += k3-j721s2-common-proc-board.dtb
> > >>
> > >> +dtb-$(CONFIG_ARCH_K3) += k3-am69-sk.dtb
> > >
> > > I was told the order of entries here is "time of release". Is it
> > > correct? This is the order you want to keep here and am69-sk was
> > > released after j721s2-common-proc-board but before j784s4-evm?
> >
> >
> > Unfortunately, files are not in any particular order at the moment.
> >
> > Currently, entries are grouped into a block based upon SoC present on
> > them. Boards within the family block are sorted alphabetically. But the
> > block of SoCs itself is arranged in no particular order.
> >
> > I would like to propose to cleanup this file such that board dtbs are
> > grouped as per SoC present on them (like now), sort the group
> > alphabetically. Also then sort alphabetically within the family (similar
> > how boards appear in dt bindings)
> >
> > Will do that towards end of rc6 once these patches are queued up to
> > avoid merge conflicts.
> >
> As per the approach mentioned by Vignesh, I have grouped the am69 sk into
> the SoC block J784S4 and sorted the board in alphabetical order.
> Please revert with your thoughts on this.
> > >
Could you please let me know if the approach is acceptable?
> > >>  dtb-$(CONFIG_ARCH_K3) += k3-j784s4-evm.dtb
> > >>
> > >
> > >
> > > Best regards,
> > > Krzysztof
> > >
> >
> > --
> > Regards
> > Vignesh
>
> Regards
> Dasnavis Sabiya

Regards,
Dasnavis Sabiya