6.12-stable review patch. If anyone has any objections, please let me know.
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From: Judith Mendez jm@ti.com
commit d2d7a96b29ea6ab093973a1a37d26126db70c79f upstream.
This adds SDHCI_AM654_QUIRK_DISABLE_HS400 quirk which shall be used to disable HS400 support. AM62P SR1.0 and SR1.1 do not support HS400 due to errata i2458 [0] so disable HS400 for these SoC revisions.
[0] https://www.ti.com/lit/er/sprz574a/sprz574a.pdf Fixes: 37f28165518f ("arm64: dts: ti: k3-am62p: Add ITAP/OTAP values for MMC") Cc: stable@vger.kernel.org Signed-off-by: Judith Mendez jm@ti.com Reviewed-by: Andrew Davis afd@ti.com Acked-by: Adrian Hunter adrian.hunter@intel.com Link: https://lore.kernel.org/r/20250820193047.4064142-1-jm@ti.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org [ adapted quirk bit assignment from BIT(2) to BIT(1) ] Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mmc/host/sdhci_am654.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
--- a/drivers/mmc/host/sdhci_am654.c +++ b/drivers/mmc/host/sdhci_am654.c @@ -155,6 +155,7 @@ struct sdhci_am654_data { u32 tuning_loop;
#define SDHCI_AM654_QUIRK_FORCE_CDTEST BIT(0) +#define SDHCI_AM654_QUIRK_DISABLE_HS400 BIT(1) };
struct window { @@ -734,6 +735,7 @@ static int sdhci_am654_init(struct sdhci { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_am654_data *sdhci_am654 = sdhci_pltfm_priv(pltfm_host); + struct device *dev = mmc_dev(host->mmc); u32 ctl_cfg_2 = 0; u32 mask; u32 val; @@ -789,6 +791,12 @@ static int sdhci_am654_init(struct sdhci if (ret) goto err_cleanup_host;
+ if (sdhci_am654->quirks & SDHCI_AM654_QUIRK_DISABLE_HS400 && + host->mmc->caps2 & (MMC_CAP2_HS400 | MMC_CAP2_HS400_ES)) { + dev_info(dev, "HS400 mode not supported on this silicon revision, disabling it\n"); + host->mmc->caps2 &= ~(MMC_CAP2_HS400 | MMC_CAP2_HS400_ES); + } + ret = __sdhci_add_host(host); if (ret) goto err_cleanup_host; @@ -852,6 +860,12 @@ static int sdhci_am654_get_of_property(s return 0; }
+static const struct soc_device_attribute sdhci_am654_descope_hs400[] = { + { .family = "AM62PX", .revision = "SR1.0" }, + { .family = "AM62PX", .revision = "SR1.1" }, + { /* sentinel */ } +}; + static const struct of_device_id sdhci_am654_of_match[] = { { .compatible = "ti,am654-sdhci-5.1", @@ -943,6 +957,10 @@ static int sdhci_am654_probe(struct plat goto err_pltfm_free; }
+ soc = soc_device_match(sdhci_am654_descope_hs400); + if (soc) + sdhci_am654->quirks |= SDHCI_AM654_QUIRK_DISABLE_HS400; + host->mmc_host_ops.execute_tuning = sdhci_am654_execute_tuning;
pm_runtime_get_noresume(dev);