This patch enable cache snooping when the sdhc is initialized.
---
drivers/mmc/host/sdhci.c | 3 +++
drivers/mmc/host/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 288e40b..cc6d45c 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -178,6 +178,9 @@ static void sdhci_init(struct sdhci_host *host)
{
sdhci_reset(host, SDHCI_RESET_ALL);
+ /* Enable cache snooping */
+ sdhci_writel(host, SDHCI_CACHE_SNOOP, SDHCI_HOST_DMA_CONTROL);
+
sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK,
SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index afda7f1..9ee9622 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -176,6 +176,10 @@
#define SDHCI_SPEC_100 0
#define SDHCI_SPEC_200 1
+/* 40C DMA control register*/
+#define SDHCI_HOST_DMA_CONTROL 0x40C
+#define SDHCI_CACHE_SNOOP 0x40
+
struct sdhci_ops;
struct sdhci_host {
--
1.6.4
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