Re: [PATCH 29/43] rtc: m48t86: add DT support for m48t86

[Arnd Bergmann]

On Mon, Apr 24, 2023, at 14:34, Nikita Shubin wrote:
> - get regs from device tree
>
> Signed-off-by: Nikita Shubin <nikita.shubin@xxxxxxxxxxx>

Acked-by: Arnd Bergmann <arnd@xxxxxxxx>

> 
> +#ifdef CONFIG_OF
> +static const struct of_device_id m48t86_rtc_of_ids[] = {
> +	{ .compatible = "dallas,rtc-m48t86" },
> +	{ /* end of table */ },
> +};
> +MODULE_DEVICE_TABLE(of, m48t86_rtc_of_ids);
> +#endif
> +
>  static struct platform_driver m48t86_rtc_platform_driver = {
>  	.driver		= {
>  		.name	= "rtc-m48t86",
> +		.of_match_table = of_match_ptr(m48t86_rtc_of_ids),
>  	},
>  	.probe		= m48t86_rtc_probe,

If you end up doing another revision, I'd suggest you drop the
of_match_ptr() and the #ifdef: there is no point in saving a
few bytes of space for non-DT kernel builds if both the machines
that use this device always rquire CONFIG_OF to be enabled.

     Arnd