[PATCH] mmc: esdhi: Add SDHCI_QUIRK_QORIQ_CIRCUIT_SUPPORT_VS33 quirk support
From: Chunhe Lan <hidden>
Date: 2012-11-22 08:13:56
Also in:
linux-mmc
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, secure digital host controller interface (sdhci) driver, the rest · Maintainers:
Ulf Hansson, Adrian Hunter, Linus Torvalds
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 <redacted> --- 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