On the some platforms of Freescale, sdhci controller can only
support 1.8V voltage, but the peripheral hardware circuit has
capability to support 3.3V voltage.
Signed-off-by: Chunhe Lan <chunhe....@freescale.com>
---
drivers/mmc/host/sdhci.c | 3 +++
include/linux/mmc/sdhci.h | 4 ++++
2 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 4fe2de8..e4a537d 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2682,6 +2682,9 @@ int sdhci_add_host(struct sdhci_host *host)
host->caps1 :
sdhci_readl(host, SDHCI_CAPABILITIES_1);
+ if (host->quirks & SDHCI_QUIRK_QORIQ_CIRCUIT_SUPPORT_VS33)
+ caps[0] = caps[0] | SDHCI_CAN_VDD_330;
+
if (host->quirks & SDHCI_QUIRK_FORCE_DMA)
host->flags |= SDHCI_USE_SDMA;
else if (!(caps[0] & SDHCI_CAN_DO_SDMA))
diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h
index 1edcb4d..78eced5 100644
--- a/include/linux/mmc/sdhci.h
+++ b/include/linux/mmc/sdhci.h
@@ -87,6 +87,10 @@ struct sdhci_host {
#define SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC (1<<30)
/* The read-only detection via SDHCI_PRESENT_STATE register is unstable */
#define SDHCI_QUIRK_UNSTABLE_RO_DETECT (1<<31)
+/* Controller can only supports 1.8V, but the peripheral hardware
+ * circuit has capability to support 3.3V
+ */
+#define SDHCI_QUIRK_QORIQ_CIRCUIT_SUPPORT_VS33 (1U<<32)
unsigned int quirks2; /* More deviations from spec. */
--
1.7.6.5
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