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

[Peng Fan <peng.fan@oss.nxp.com>]

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@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.

we are hoping to land i.MX95 in near term, so I would prefer to extend the
driver after we finish i.MX95 patchset.

Thanks,
Peng