[Upstream] Re: [PATCH v2 13/15] arm64: dts: imx8mm-phycore-som: Add overlay for rproc

[Andrej Picej]

Gentle ping.

Best regards,
Andrej

On 31. 12. 24 08:34, Andrej Picej wrote:
> Hi Shawn,
> 
> On 30. 12. 24 05:17, Shawn Guo wrote:
>> On Mon, Dec 02, 2024 at 08:20:50AM +0100, Andrej Picej wrote:
>>> From: Dominik Haller <d.haller at phytec.de>
>>>
>>> Adds a devicetree overlay containing reserved memory regions used
>>> for intercore communication between A53 and M4 cores.
>>>
>>> Signed-off-by: Dominik Haller <d.haller at phytec.de>
>>> Signed-off-by: Andrej Picej <andrej.picej at norik.com>
>>> ---
>>> Changes in v2:
>>>   - no change.
>>> ---
>>>   arch/arm64/boot/dts/freescale/Makefile        |  2 +
>>>   .../dts/freescale/imx8mm-phycore-rpmsg.dtso   | 55 +++++++++++++++++++
>>>   2 files changed, 57 insertions(+)
>>>   create mode 100644 
>>> arch/arm64/boot/dts/freescale/imx8mm-phycore-rpmsg.dtso
>>>
>>> diff --git a/arch/arm64/boot/dts/freescale/Makefile 
>>> b/arch/arm64/boot/dts/freescale/Makefile
>>> index 99be36a04db9..5bc083a7b778 100644
>>> --- a/arch/arm64/boot/dts/freescale/Makefile
>>> +++ b/arch/arm64/boot/dts/freescale/Makefile
>>> @@ -125,9 +125,11 @@ dtb-$(CONFIG_ARCH_MXC) += 
>>> imx8mm-phyboard-polis-rdk.dtb
>>>   imx8mm-phyboard-polis-peb-av-10-dtbs += 
>>> imx8mm-phyboard-polis-rdk.dtb imx8mm-phyboard-polis-peb-av-10.dtbo
>>>   imx8mm-phyboard-polis-peb-eval-01-dtbs += 
>>> imx8mm-phyboard-polis-rdk.dtb imx8mm-phyboard-polis-peb-eval-01.dtbo
>>> +imx8mm-phycore-rpmsg-dtbs += imx8mm-phyboard-polis-rdk.dtb 
>>> imx8mm-phycore-rpmsg.dtbo
>>>   dtb-$(CONFIG_ARCH_MXC) += imx8mm-phyboard-polis-peb-av-10.dtb
>>>   dtb-$(CONFIG_ARCH_MXC) += imx8mm-phyboard-polis-peb-eval-01.dtb
>>> +dtb-$(CONFIG_ARCH_MXC) += imx8mm-phycore-rpmsg.dtb
>>>   dtb-$(CONFIG_ARCH_MXC) += imx8mm-phygate-tauri-l.dtb
>>>   dtb-$(CONFIG_ARCH_MXC) += imx8mm-prt8mm.dtb
>>> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-phycore-rpmsg.dtso 
>>> b/arch/arm64/boot/dts/freescale/imx8mm-phycore-rpmsg.dtso
>>> new file mode 100644
>>> index 000000000000..0c61946f0cf8
>>> --- /dev/null
>>> +++ b/arch/arm64/boot/dts/freescale/imx8mm-phycore-rpmsg.dtso
>>> @@ -0,0 +1,55 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>> +/*
>>> + * Copyright (C) 2024 PHYTEC Messtechnik GmbH
>>> + * Author: Dominik Haller <d.haller at phytec.de>
>>> + */
>>> +
>>> +/dts-v1/;
>>> +/plugin/;
>>> +
>>> +#include <dt-bindings/clock/imx8mm-clock.h>
>>> +
>>> +&{/} {
>>> +    reserved-memory {
>>> +        #address-cells = <2>;
>>> +        #size-cells = <2>;
>>> +        ranges;
>>
>> I'm getting this:
>>
>> arch/arm64/boot/dts/freescale/imx8mm-phycore-rpmsg.dtso:16.3-10: 
>> Warning (ranges_format): 
>> /fragment at 0/__overlay__/reserved-memory:ranges: empty "ranges" 
>> property but its #size-cells (2) differs from /fragment at 0/__overlay__ (1)
>> arch/arm64/boot/dts/freescale/imx8mm-phycore-rpmsg.dtso:13.18-43.4: 
>> Warning (avoid_default_addr_size): 
>> /fragment at 0/__overlay__/reserved-memory: Relying on default 
>> #address-cells value
>> arch/arm64/boot/dts/freescale/imx8mm-phycore-rpmsg.dtso:13.18-43.4: 
>> Warning (avoid_default_addr_size): 
>> /fragment at 0/__overlay__/reserved-memory: Relying on default 
>> #size-cells value
>>
> 
> I see, missed this before, sorry. But I have some problems fixing it.
> I think the problem is that this is overlay, the same node put in the 
> imx8mm-phycore-som.dtsi doesn't trigger a warning.
> The only solution that I found is that I specify the default 
> address-cells and size-cells in root node:
> 
> 
> &{/} {
>      #address-cells = <2>;
>      #size-cells = <2>;
> 
>      reserved-memory {
>          #address-cells = <2>;
>          #size-cells = <2>;
>          ranges;
>      ...
>      };
> };
> 
> The same values are used in imx8mm.dtsi, but the checker fails to find 
> these default values.
> Not sure if this is the right solution, though. Your input would be 
> helpful, thanks.
> 
> Best regards,
> Andrej
> 
> 
>> Shawn
>>
>>> +
>>> +        m4_reserved: m4 at 80000000 {
>>> +            reg = <0 0x80000000 0 0x1000000>;
>>> +            no-map;
>>> +        };
>>> +
>>> +        vdev0vring0: vdev0vring0 at b8000000 {
>>> +            reg = <0 0xb8000000 0 0x8000>;
>>> +            no-map;
>>> +        };
>>> +
>>> +        vdev0vring1: vdev0vring1 at b8008000 {
>>> +            reg = <0 0xb8008000 0 0x8000>;
>>> +            no-map;
>>> +        };
>>> +
>>> +        rsc_table: rsc_table at b80ff000 {
>>> +            reg = <0 0xb80ff000 0 0x1000>;
>>> +            no-map;
>>> +        };
>>> +
>>> +        vdevbuffer: vdevbuffer at b8400000 {
>>> +            compatible = "shared-dma-pool";
>>> +            reg = <0 0xb8400000 0 0x100000>;
>>> +            no-map;
>>> +        };
>>> +    };
>>> +
>>> +    core-m4 {
>>> +        compatible = "fsl,imx8mm-cm4";
>>> +        clocks = <&clk IMX8MM_CLK_M4_DIV>;
>>> +        mboxes = <&mu 0 1
>>> +            &mu 1 1
>>> +            &mu 3 1>;
>>> +        mbox-names = "tx", "rx", "rxdb";
>>> +        memory-region = <&vdevbuffer>, <&vdev0vring0>, 
>>> <&vdev0vring1>, <&rsc_table>;
>>> +        syscon = <&src>;
>>> +    };
>>> +};
>>> -- 
>>> 2.34.1
>>>
>>
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