| Message ID | 20250516203121.3736379-1-jm@ti.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v6] mmc: sdhci_am654: Add SDHCI_QUIRK2_SUPPRESS_V1P8_ENA quirk to am62 compatible | expand |
On Fri, 16 May 2025 at 22:31, Judith Mendez <jm@ti.com> wrote: > > 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 941a7abd4666 > ("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: ac5a41b472b4 ("Revert "mmc: sdhci_am654: Add sdhci_am654_start_signal_voltage_switch"") > Fixes: 941a7abd4666 ("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> Applied for fixes, thanks! Kind regards Uffe > --- > Changes since v5: > - Drop sdhci_am62_4bit_pdata > - Pick Adrians tag > - Add note to commit message > > Tested on am62x SK, am64x EVM and am64x SK. Tested-bys are welcome > > Link to v5: > https://lore.kernel.org/linux-mmc/20250514002513.1179186-1-jm@ti.com/ > Link to v4: > https://lore.kernel.org/linux-mmc/20250424180036.1541568-1-jm@ti.com/ > Link to v3 RESEND: > https://lore.kernel.org/linux-mmc/8678d284-db12-451a-b789-2b75f9932f9f@ti.com > Link to v2: > https://lore.kernel.org/linux-mmc/20250417182652.3521104-1-jm@ti.com/ > Link to v1: > https://lore.kernel.org/linux-mmc/20250407222702.2199047-1-jm@ti.com/ > --- > drivers/mmc/host/sdhci_am654.c | 35 +++++++++++++++++++++++++++++++++- > 1 file changed, 34 insertions(+), 1 deletion(-) > > diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c > index f75c31815ab0..73385ff4c0f3 100644 > --- 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_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); > > base-commit: 8566fc3b96539e3235909d6bdda198e1282beaed > -- > 2.49.0 >
diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c index f75c31815ab0..73385ff4c0f3 100644 --- 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_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);
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 941a7abd4666 ("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: ac5a41b472b4 ("Revert "mmc: sdhci_am654: Add sdhci_am654_start_signal_voltage_switch"") Fixes: 941a7abd4666 ("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> --- Changes since v5: - Drop sdhci_am62_4bit_pdata - Pick Adrians tag - Add note to commit message Tested on am62x SK, am64x EVM and am64x SK. Tested-bys are welcome Link to v5: https://lore.kernel.org/linux-mmc/20250514002513.1179186-1-jm@ti.com/ Link to v4: https://lore.kernel.org/linux-mmc/20250424180036.1541568-1-jm@ti.com/ Link to v3 RESEND: https://lore.kernel.org/linux-mmc/8678d284-db12-451a-b789-2b75f9932f9f@ti.com Link to v2: https://lore.kernel.org/linux-mmc/20250417182652.3521104-1-jm@ti.com/ Link to v1: https://lore.kernel.org/linux-mmc/20250407222702.2199047-1-jm@ti.com/ --- drivers/mmc/host/sdhci_am654.c | 35 +++++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) base-commit: 8566fc3b96539e3235909d6bdda198e1282beaed