[PATCH 1/3] mmc: sdhci_am654: Workaround for Errata i2312

[Adrian Hunter]

On 25/06/2025 01:12, Judith Mendez wrote:
> Errata i2312 [0] for K3 silicon mentions the maximum obtainable
> timeout through MMC host controller is 700ms. And for commands taking
> longer than 700ms, hardware timeout should be disabled and software
> timeout should be used.
> 
> The workaround for Errata i2312 can be achieved by adding
> SDHCI_QUIRK2_DISABLE_HW_TIMEOUT quirk in sdhci_am654.
> 
> [0] https://www.ti.com/lit/pdf/sprz487
> 
> Signed-off-by: Judith Mendez <jm at ti.com>

Acked-by: Adrian Hunter <adrian.hunter at intel.com>

> ---
>  drivers/mmc/host/sdhci_am654.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c
> index ea14d56558c4..86d87d8e0675 100644
> --- a/drivers/mmc/host/sdhci_am654.c
> +++ b/drivers/mmc/host/sdhci_am654.c
> @@ -613,7 +613,8 @@ static const struct sdhci_ops sdhci_am654_ops = {
>  static const struct sdhci_pltfm_data sdhci_am654_pdata = {
>  	.ops = &sdhci_am654_ops,
>  	.quirks = SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12,
> -	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
> +	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
> +		   SDHCI_QUIRK2_DISABLE_HW_TIMEOUT,
>  };
>  
>  static const struct sdhci_am654_driver_data sdhci_am654_sr1_drvdata = {
> @@ -643,7 +644,8 @@ static const struct sdhci_ops sdhci_j721e_8bit_ops = {
>  static const struct sdhci_pltfm_data sdhci_j721e_8bit_pdata = {
>  	.ops = &sdhci_j721e_8bit_ops,
>  	.quirks = SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12,
> -	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
> +	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
> +		   SDHCI_QUIRK2_DISABLE_HW_TIMEOUT,
>  };
>  
>  static const struct sdhci_am654_driver_data sdhci_j721e_8bit_drvdata = {
> @@ -667,7 +669,8 @@ static const struct sdhci_ops sdhci_j721e_4bit_ops = {
>  static const struct sdhci_pltfm_data sdhci_j721e_4bit_pdata = {
>  	.ops = &sdhci_j721e_4bit_ops,
>  	.quirks = SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12,
> -	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
> +	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
> +		   SDHCI_QUIRK2_DISABLE_HW_TIMEOUT,
>  };
>  
>  static const struct sdhci_am654_driver_data sdhci_j721e_4bit_drvdata = {