77 lines
2.7 KiB
Diff
77 lines
2.7 KiB
Diff
From a8f43b888ffc5eb53f5735cc21c765d035c11c5e Mon Sep 17 00:00:00 2001
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From: Judith Mendez <jm@ti.com>
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Date: Wed, 20 Aug 2025 14:30:47 -0500
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Subject: 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
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to disable HS400 support. AM62P SR1.0 and SR1.1 do not support HS400
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due to errata i2458 [0] so disable HS400 for these SoC revisions.
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[0] https://www.ti.com/lit/er/sprz574a/sprz574a.pdf
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Fixes: 37f28165518f ("arm64: dts: ti: k3-am62p: Add ITAP/OTAP values for MMC")
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Cc: stable@vger.kernel.org
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Signed-off-by: Judith Mendez <jm@ti.com>
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Reviewed-by: Andrew Davis <afd@ti.com>
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Acked-by: Adrian Hunter <adrian.hunter@intel.com>
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Link: https://lore.kernel.org/r/20250820193047.4064142-1-jm@ti.com
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Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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---
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drivers/mmc/host/sdhci_am654.c | 18 ++++++++++++++++++
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1 file changed, 18 insertions(+)
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--- a/drivers/mmc/host/sdhci_am654.c
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+++ b/drivers/mmc/host/sdhci_am654.c
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@@ -156,6 +156,7 @@ struct sdhci_am654_data {
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#define SDHCI_AM654_QUIRK_FORCE_CDTEST BIT(0)
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#define SDHCI_AM654_QUIRK_SUPPRESS_V1P8_ENA BIT(1)
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+#define SDHCI_AM654_QUIRK_DISABLE_HS400 BIT(2)
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};
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struct window {
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@@ -765,6 +766,7 @@ static int sdhci_am654_init(struct sdhci
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{
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct sdhci_am654_data *sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
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+ struct device *dev = mmc_dev(host->mmc);
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u32 ctl_cfg_2 = 0;
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u32 mask;
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u32 val;
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@@ -820,6 +822,12 @@ static int sdhci_am654_init(struct sdhci
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if (ret)
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goto err_cleanup_host;
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+ if (sdhci_am654->quirks & SDHCI_AM654_QUIRK_DISABLE_HS400 &&
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+ host->mmc->caps2 & (MMC_CAP2_HS400 | MMC_CAP2_HS400_ES)) {
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+ dev_info(dev, "HS400 mode not supported on this silicon revision, disabling it\n");
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+ host->mmc->caps2 &= ~(MMC_CAP2_HS400 | MMC_CAP2_HS400_ES);
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+ }
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+
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ret = __sdhci_add_host(host);
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if (ret)
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goto err_cleanup_host;
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@@ -883,6 +891,12 @@ static int sdhci_am654_get_of_property(s
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return 0;
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}
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+static const struct soc_device_attribute sdhci_am654_descope_hs400[] = {
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+ { .family = "AM62PX", .revision = "SR1.0" },
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+ { .family = "AM62PX", .revision = "SR1.1" },
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+ { /* sentinel */ }
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+};
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+
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static const struct of_device_id sdhci_am654_of_match[] = {
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{
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.compatible = "ti,am654-sdhci-5.1",
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@@ -970,6 +984,10 @@ static int sdhci_am654_probe(struct plat
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if (ret)
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return dev_err_probe(dev, ret, "parsing dt failed\n");
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+ soc = soc_device_match(sdhci_am654_descope_hs400);
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+ if (soc)
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+ sdhci_am654->quirks |= SDHCI_AM654_QUIRK_DISABLE_HS400;
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+
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host->mmc_host_ops.start_signal_voltage_switch = sdhci_am654_start_signal_voltage_switch;
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host->mmc_host_ops.execute_tuning = sdhci_am654_execute_tuning;
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