Re: 回复: [EXT] Re: [PATCH v3 01/17] mailbox: add i.MX95 Messaging Unit (MU) driver

[Marek Vasut]

On 1/7/25 6:01 AM, Peng Fan wrote:
> On Mon, Jan 06, 2025 at 09:39:57PM +0100, Marek Vasut wrote:
>> On 1/6/25 6:27 AM, Alice Guo (OSS) wrote:
>>>> 主题: [EXT] Re: [PATCH v3 01/17] mailbox: add i.MX95 Messaging Unit (MU)
>>>> driver
>>>>
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>>>> On 1/3/25 7:45 AM, Alice Guo wrote:
>>>>> From: Peng Fan <peng.fan at nxp.com>
>>>>>
>>>>> i.MX95 Messaging Unit (MU) enables 2 processors on a chip to
>>>>> communicate and coordinate by passing messages (e.g. frame
>>>>> information, event notices and requests) through the MU interface.
>>>>> This patch provides a driver for i.MX95 MU using the common mailbox
>>>>> framework. Currently, SCMI exchanges on i.MX95 uses a mailbox
>>>>> transport with SMT format, and the hardware used is this MU.
>>>> Is this ported from Linux ? If so, as of which mainline Linux kernel commit ?
>>>
>>> Yes, u-boot/drivers/mailbox/imx-mailbox.c is ported v6.12.8 Linux.
>>
>> Please add that information into the commit message, including the kernel
>> version and Linux commit ID , in case this driver needs to be updated.
>>
>>>> Can you add older iMX SoC support while adding this driver ? It seems
>>>> imx6..imx95 MU IP look very similar.
>>>
>>> This patch-set is only for i.MX95. I can add the older iMX SoC support in the future.
>> Maybe you could split off addition of the MU driver into separate series and
>> do it for all the SoCs right away instead ?
> 
> Adding other SoCs support needs tests, but to tests other platforms, we
> need more work. We could not just put code here that not tested for other SoCs.
If you are already porting the MU driver for Linux, there is a good 
chance the support for other SoCs was already tested in Linux, so it 
should be safe to port it over in full to U-Boot that way ?