Re: [PATCH 4/8] i3c: renesas: Add RZ/G3L support

[Krzysztof Kozlowski]

On Tue, Oct 20, 2026 at 10:14:58AM +0100, Diogo Ivo wrote:
> Add support for the I3C Bus Interface on the Renesas RZ/G3L (R9A08G046)
> SoC by adding the renesas,r9a08g046-i3c compatible to the OF match
> table.
> 
> The controller is very similar to the IP on the RZ/G3S. However, for
> instance the RZ/G3L variant has no HDR Exit Pattern detection interrupt:
> RZ/G3S exposes 17 interrupts, while RZ/G3L exposes 16. A RZ/G3L node
> therefore cannot be described with the RZ/G3S compatible, as its bindings
> require at least 17 interrupts. The same point applies to RZ/G3E, that
> requires 3 clocks while the RZ/G3L requires 2.
> 
> >From the driver point of view there is no difference between the two
> SoCs: the driver only consumes the tclk clock, the presetn and tresetn
> resets and seven named interrupts (resp, rx, tx, st, sp, tend, nack),
> all of which are among the 16 shared ones. No driver changes are needed
> besides the new compatible.
> 
> Signed-off-by: Diogo Ivo <diogo.ivo.sx@xxxxxxxxxxx>
> ---
>  drivers/i3c/master/renesas-i3c.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/i3c/master/renesas-i3c.c b/drivers/i3c/master/renesas-i3c.c
> index 4fddc1b4fdbb..80a6df1151bf 100644
> --- a/drivers/i3c/master/renesas-i3c.c
> +++ b/drivers/i3c/master/renesas-i3c.c
> @@ -1625,6 +1625,7 @@ static const struct dev_pm_ops renesas_i3c_pm_ops = {
>  
>  static const struct of_device_id renesas_i3c_of_ids[] = {
>  	{ .compatible = "renesas,r9a08g045-i3c" },
> +	{ .compatible = "renesas,r9a08g046-i3c" },

So fully compatible? If so, drop this and express compatibility in the
bindings.

Best regards,
Krzysztof