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diff --git a/sys/dev/sdhci/sdhci_fsl_fdt.c b/sys/dev/sdhci/sdhci_fsl_fdt.c
--- a/sys/dev/sdhci/sdhci_fsl_fdt.c
+++ b/sys/dev/sdhci/sdhci_fsl_fdt.c
@@ -70,6 +70,7 @@
#define SDHCI_FSL_PROT_CTRL_BYTE_NATIVE (2 << 4)
#define SDHCI_FSL_PROT_CTRL_BYTE_MASK (3 << 4)
#define SDHCI_FSL_PROT_CTRL_DMA_MASK (3 << 8)
+#define SDHCI_FSL_PROT_CTRL_VOLT_SEL (1 << 10)
#define SDHCI_FSL_SYS_CTRL 0x2c
#define SDHCI_FSL_CLK_IPGEN (1 << 0)
@@ -102,6 +103,8 @@
/* Some platforms do not detect pulse width correctly. */
#define SDHCI_FSL_UNRELIABLE_PULSE_DET (1 << 0)
+/* On some platforms switching voltage to 1.8V is not supported */
+#define SDHCI_FSL_UNSUPP_1_8V (1 << 1)
struct sdhci_fsl_fdt_softc {
device_t dev;
@@ -132,7 +135,7 @@
static const struct sdhci_fsl_fdt_soc_data sdhci_fsl_fdt_ls1012a_soc_data = {
.quirks = 0,
.baseclk_div = 1,
- .errata = 0
+ .errata = SDHCI_FSL_UNSUPP_1_8V,
};
static const struct sdhci_fsl_fdt_soc_data sdhci_fsl_fdt_ls1028a_soc_data = {
@@ -145,6 +148,7 @@
static const struct sdhci_fsl_fdt_soc_data sdhci_fsl_fdt_ls1046a_soc_data = {
.quirks = SDHCI_QUIRK_DONT_SET_HISPD_BIT | SDHCI_QUIRK_BROKEN_AUTO_STOP,
.baseclk_div = 2,
+ .errata = SDHCI_FSL_UNSUPP_1_8V,
};
static const struct sdhci_fsl_fdt_soc_data sdhci_fsl_fdt_gen_data = {
@@ -517,34 +521,46 @@
{
struct sdhci_fsl_fdt_softc *sc;
struct sdhci_slot *slot;
+ regulator_t vqmmc_supply;
+ uint32_t val_old, val;
int uvolt, err;
sc = device_get_softc(brdev);
+ slot = device_get_ivars(reqdev);
- if (sc->fdt_helper.vqmmc_supply == NULL)
- return EOPNOTSUPP;
-
- err = sdhci_generic_switch_vccq(brdev, reqdev);
- if (err != 0)
- return (err);
+ val_old = val = RD4(sc, SDHCI_FSL_PROT_CTRL);
- slot = device_get_ivars(reqdev);
switch (slot->host.ios.vccq) {
case vccq_180:
+ if (sc->soc_data->errata & SDHCI_FSL_UNSUPP_1_8V)
+ return (EOPNOTSUPP);
+
+ val |= SDHCI_FSL_PROT_CTRL_VOLT_SEL;
uvolt = 1800000;
break;
case vccq_330:
+ val &= ~SDHCI_FSL_PROT_CTRL_VOLT_SEL;
uvolt = 3300000;
break;
default:
- return EINVAL;
+ return (EOPNOTSUPP);
}
- err = regulator_set_voltage(sc->fdt_helper.vqmmc_supply, uvolt, uvolt);
- if (err != 0) {
- device_printf(sc->dev,
- "Cannot set vqmmc to %d<->%d\n", uvolt, uvolt);
- return (err);
+ WR4(sc, SDHCI_FSL_PROT_CTRL, val);
+
+ vqmmc_supply = sc->fdt_helper.vqmmc_supply;
+ /*
+ * Even though we expect to find a fixed regulator in this controller
+ * family, let's play safe.
+ */
+ if (vqmmc_supply != NULL) {
+ err = regulator_set_voltage(vqmmc_supply, uvolt, uvolt);
+ if (err != 0) {
+ device_printf(sc->dev,
+ "Cannot set vqmmc to %d<->%d\n", uvolt, uvolt);
+ WR4(sc, SDHCI_FSL_PROT_CTRL, val_old);
+ return (err);
+ }
}
return (0);

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