Re: [PATCH] mmc: sdhci-msm: Slot indexing for distinguishing multiple SDCC instances

[Adrian Hunter]

On 22/10/24 17:18, Sachin Gupta wrote:
> This update addresses the requirement for accurate slot indexing
> in the sdhci-msm driver to differentiate between multiple SDCC
> (Secure Digital Card Controller) instances, such as eMMC, SD card,
> and SDIO.
> 
> Additionally, it revises the slot indexing logic to comply with
> the new device tree (DT) specifications.

This patch seems incomplete because all it does is assign a global
variable which is never used again.

> 
> Signed-off-by: Ram Prakash Gupta <quic_rampraka@xxxxxxxxxxx>
> Signed-off-by: Sarthak Garg <quic_sartgarg@xxxxxxxxxxx>
> Signed-off-by: Maramaina Naresh <quic_mnaresh@xxxxxxxxxxx>
> Signed-off-by: Ziqi Chen <quic_ziqichen@xxxxxxxxxxx>
> Signed-off-by: Sachin Gupta <quic_sachgupt@xxxxxxxxxxx>
> ---
>  drivers/mmc/host/sdhci-msm.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
> index e113b99a3eab..3cb79117916f 100644
> --- a/drivers/mmc/host/sdhci-msm.c
> +++ b/drivers/mmc/host/sdhci-msm.c
> @@ -292,6 +292,8 @@ struct sdhci_msm_host {
>  	bool vqmmc_enabled;
>  };
>  
> +static struct sdhci_msm_host *sdhci_slot[3];
> +
>  static const struct sdhci_msm_offset *sdhci_priv_msm_offset(struct sdhci_host *host)
>  {
>  	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> @@ -2426,6 +2428,14 @@ static int sdhci_msm_probe(struct platform_device *pdev)
>  	if (ret)
>  		goto pltfm_free;
>  
> +	if (node) {
> +		ret = of_alias_get_id(pdev->dev.of_node, "mmc");
> +		if (ret < 0)
> +			dev_err(&pdev->dev, "get slot index failed %d\n", ret);
> +		else
> +			sdhci_slot[ret] = msm_host;
> +	}
> +
>  	/*
>  	 * Based on the compatible string, load the required msm host info from
>  	 * the data associated with the version info.