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mmc: sdhci_am654: Add SDHCI_QUIRK2_SUPPRESS_V1P8_ENA quirk to am62 compatible 

Add a new struct for platform data for the ti,am62-sdhci compatible to
apply additional quirks, namely "SDHCI_QUIRK2_SUPPRESS_V1P8_ENA", to
host controllers with am62 compatible.

Note, the fix was originally introduced by commit 941a7abd46
("mmc: sdhci_am654: Add sdhci_am654_start_signal_voltage_switch") but was
found to be applied too broadly and had to be reverted.

This fixes MMC init failures seen across am62x boards.

Fixes: ac5a41b472 ("Revert "mmc: sdhci_am654: Add sdhci_am654_start_signal_voltage_switch"")
Fixes: 941a7abd46 ("mmc: sdhci_am654: Add sdhci_am654_start_signal_voltage_switch")
Cc: stable@vger.kernel.org
Suggested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Judith Mendez <jm@ti.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20250516203121.3736379-1-jm@ti.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Judith Mendez 2025-05-16 15:31:21 -05:00 committed by Ulf Hansson
parent 08f959759e
commit 71c9475b1e
1 changed files with 34 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/mmc/host/sdhci_am654.c
View File

@ -155,6 +155,7 @@ struct sdhci_am654_data {
u32 tuning_loop;
#define SDHCI_AM654_QUIRK_FORCE_CDTEST BIT(0)
#define SDHCI_AM654_QUIRK_SUPPRESS_V1P8_ENA BIT(1)
};
struct window {
@ -166,6 +167,7 @@ struct window {
struct sdhci_am654_driver_data {
const struct sdhci_pltfm_data *pdata;
u32 flags;
u32 quirks;
#define IOMUX_PRESENT (1 << 0)
#define FREQSEL_2_BIT (1 << 1)
#define STRBSEL_4_BIT (1 << 2)
@ -356,6 +358,29 @@ static void sdhci_j721e_4bit_set_clock(struct sdhci_host *host,
sdhci_set_clock(host, clock);
}
static int sdhci_am654_start_signal_voltage_switch(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct sdhci_host *host = mmc_priv(mmc);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_am654_data *sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
int ret;
if ((sdhci_am654->quirks & SDHCI_AM654_QUIRK_SUPPRESS_V1P8_ENA) &&
ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) {
if (!IS_ERR(mmc->supply.vqmmc)) {
ret = mmc_regulator_set_vqmmc(mmc, ios);
if (ret < 0) {
pr_err("%s: Switching to 1.8V signalling voltage failed,\n",
mmc_hostname(mmc));
return -EIO;
}
}
return 0;
}
return sdhci_start_signal_voltage_switch(mmc, ios);
}
static u8 sdhci_am654_write_power_on(struct sdhci_host *host, u8 val, int reg)
{
writeb(val, host->ioaddr + reg);
@ -650,6 +675,12 @@ static const struct sdhci_am654_driver_data sdhci_j721e_4bit_drvdata = {
.flags = IOMUX_PRESENT,
};
static const struct sdhci_am654_driver_data sdhci_am62_4bit_drvdata = {
.pdata = &sdhci_j721e_4bit_pdata,
.flags = IOMUX_PRESENT,
.quirks = SDHCI_AM654_QUIRK_SUPPRESS_V1P8_ENA,
};
static const struct soc_device_attribute sdhci_am654_devices[] = {
{ .family = "AM65X",
.revision = "SR1.0",
@ -872,7 +903,7 @@ static const struct of_device_id sdhci_am654_of_match[] = {
},
{
.compatible = "ti,am62-sdhci",
.data = &sdhci_j721e_4bit_drvdata,
.data = &sdhci_am62_4bit_drvdata,
},
{ /* sentinel */ }
};
@ -906,6 +937,7 @@ static int sdhci_am654_probe(struct platform_device *pdev)
pltfm_host = sdhci_priv(host);
sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
sdhci_am654->flags = drvdata->flags;
sdhci_am654->quirks = drvdata->quirks;
clk_xin = devm_clk_get(dev, "clk_xin");
if (IS_ERR(clk_xin)) {
@ -940,6 +972,7 @@ static int sdhci_am654_probe(struct platform_device *pdev)
goto err_pltfm_free;
}
host->mmc_host_ops.start_signal_voltage_switch = sdhci_am654_start_signal_voltage_switch;
host->mmc_host_ops.execute_tuning = sdhci_am654_execute_tuning;
pm_runtime_get_noresume(dev);