[PATCH RESEND v4 1/3] dt-bindings: lcdif: Document a imx6sx-lcdif fallback

[Liu Ying]

On 10/20/2025, Fabio Estevam wrote:
> Hi Liu,

Hi Fabio,

> 
> On Tue, Oct 14, 2025 at 1:12 AM Liu Ying <victor.liu at nxp.com> wrote:
> 
>> Strictly speaking, I don't think i.MX6SX LCDIF is compatible with i.MX28 LCDIF
>> because at least i.MX28 LCDIF has the version and debug{0,1,2} registers(at
>> 0x1c0, 0x1d0, 0x1e0 and 0x1f0) while i.MX6SX LCDIF hasn't.
> 
> There are some DT users, such as Barebox that matches against
> fsl,imx28-lcdif, so we cannot remove it.

Hmmm, it looks like software projects like Barebox don't really follow this DT
binding.  Is it possible to fix Barebox to avoid changing this DT binding by
this patch?  I'm assuming that Uboot has already been fixed.

> 
> In my first attempt,  I tried removing it:
> 
> https://lore.kernel.org/linux-devicetree/20241028180844.154349-2-festevam@gmail.com/
> 
> but this was rejected due to potential dtb compatibility breakage:
> 
> https://lore.kernel.org/linux-devicetree/4addc413-dd13-4867-8c49-45539af7b45b@pengutronix.de/


-- 
Regards,
Liu Ying