This quirk is used for controllers that can only support 1.8V
voltage but the peripheral hardware circuit has capability to
support 3.3V voltage.
Signed-off-by: Yangbo Lu <yangbo.lu@xxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 3 +++
drivers/mmc/host/sdhci.h | 4 ++++
2 files changed, 7 insertions(+)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index c80287a..40de0d3 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2959,6 +2959,9 @@ int sdhci_add_host(struct sdhci_host *host)
host->caps1 :
sdhci_readl(host, SDHCI_CAPABILITIES_1);
+ if (host->quirks2 & SDHCI_QUIRK2_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/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index e639b7f..2704daf1 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -409,6 +409,10 @@ struct sdhci_host {
#define SDHCI_QUIRK2_SUPPORT_SINGLE (1<<13)
/* Controller broken with using ACMD23 */
#define SDHCI_QUIRK2_ACMD23_BROKEN (1<<14)
+/* Controller only supports 1.8V, but the peripheral hardware
+ * circuit has capability to support 3.3V
+ */
+#define SDHCI_QUIRK2_CIRCUIT_SUPPORT_VS33 (1<<15)
int irq; /* Device IRQ */
void __iomem *ioaddr; /* Mapped address */
--
2.1.0.27.g96db324
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