[PATCH 1/3] mmc: sdhci_am654: Workaround for Errata i2312
Adrian Hunter
adrian.hunter at intel.com
Wed Jun 25 23:51:28 PDT 2025
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 = {
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