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mmc: sdhci_am654: Disable HS400 for AM62P SR1.0 and SR1.1

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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: 37f2816551 ("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>
This commit is contained in:
Judith Mendez 2025-08-20 14:30:47 -05:00 • committed by Ulf Hansson
parent 99d7ab8db9
commit d2d7a96b29
1 changed files with 18 additions and 0 deletions
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18
drivers/mmc/host/sdhci_am654.c
View file

@ -156,6 +156,7 @@ struct sdhci_am654_data {
#define SDHCI_AM654_QUIRK_FORCE_CDTEST BIT(0)
#define SDHCI_AM654_QUIRK_SUPPRESS_V1P8_ENA BIT(1)
#define SDHCI_AM654_QUIRK_DISABLE_HS400 BIT(2)
};
struct window {
@ -765,6 +766,7 @@ static int sdhci_am654_init(struct sdhci_host *host)
{
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;
@ -820,6 +822,12 @@ static int sdhci_am654_init(struct sdhci_host *host)
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;
@ -883,6 +891,12 @@ static int sdhci_am654_get_of_property(struct platform_device *pdev,
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",
@ -970,6 +984,10 @@ static int sdhci_am654_probe(struct platform_device *pdev)
if (ret)
return dev_err_probe(dev, ret, "parsing dt failed\n");
soc = soc_device_match(sdhci_am654_descope_hs400);
if (soc)
sdhci_am654->quirks |= SDHCI_AM654_QUIRK_DISABLE_HS400;
host->mmc_host_ops.start_signal_voltage_switch = sdhci_am654_start_signal_voltage_switch;
host->mmc_host_ops.execute_tuning = sdhci_am654_execute_tuning;