Re: [PATCH 2/2] mmc: sdhci-of-aspeed: Add ast2700 support

[Krzysztof Kozlowski <krzk@kernel.org>]

On Fri, Mar 13, 2026 at 01:27:57PM +0800, Ryan Chen wrote:
> Add support for the AST2700 SOC in the sd controller driver. AST2700 sd
> controller requires an reset line, so hook up the optional reset control
> and deassert it during probe.
> 
> Signed-off-by: Ryan Chen <ryan_chen@aspeedtech.com>
> ---
>  drivers/mmc/host/sdhci-of-aspeed.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/mmc/host/sdhci-of-aspeed.c b/drivers/mmc/host/sdhci-of-aspeed.c
> index ca97b01996b1..91c36245e506 100644
> --- a/drivers/mmc/host/sdhci-of-aspeed.c
> +++ b/drivers/mmc/host/sdhci-of-aspeed.c
> @@ -520,6 +520,7 @@ static int aspeed_sdc_probe(struct platform_device *pdev)
>  
>  {
>  	struct device_node *parent, *child;
> +	struct reset_control *reset;
>  	struct aspeed_sdc *sdc;
>  	int ret;
>  
> @@ -529,6 +530,15 @@ static int aspeed_sdc_probe(struct platform_device *pdev)
>  
>  	spin_lock_init(&sdc->lock);
>  
> +	reset = reset_control_get_optional_exclusive(&pdev->dev, NULL);
> +	if (IS_ERR(reset))
> +		return dev_err_probe(&pdev->dev, PTR_ERR(reset),
> +				     "unable to acquire reset\n");
> +	ret = reset_control_deassert(sdc->rst);
> +	if (ret)
> +		return dev_err_probe(&pdev->dev, ret,
> +				     "reset deassert failed\n");
> +
>  	sdc->clk = devm_clk_get(&pdev->dev, NULL);
>  	if (IS_ERR(sdc->clk))
>  		return PTR_ERR(sdc->clk);
> @@ -577,6 +587,7 @@ static const struct of_device_id aspeed_sdc_of_match[] = {
>  	{ .compatible = "aspeed,ast2400-sd-controller", },
>  	{ .compatible = "aspeed,ast2500-sd-controller", },
>  	{ .compatible = "aspeed,ast2600-sd-controller", },
> +	{ .compatible = "aspeed,ast2700-sd-controller", },

So devices are fully compatible. You must express it in the bindings and
drop this hunk.

Best regards,
Krzysztof