[PATCH 2/5] mmc: sdhci: add eMMC hardware reset support

Adrian Hunter
2011-08-29T13:42:26Z

Add an SDHCI operation for hardware reset and connect it to the
host controller operation.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
drivers/mmc/host/sdhci.c | 9 +++++++++
drivers/mmc/host/sdhci.h | 2 +-
2 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 0e02cc1..d66a7a1 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1471,6 +1471,14 @@ static int sdhci_get_ro(struct mmc_host *mmc)
return 0;
}

+static void sdhci_hw_reset(struct mmc_host *mmc)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+
+ if (host->ops && host->ops->hw_reset)
+ host->ops->hw_reset(host);
+}
+
static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable)
{
struct sdhci_host *host;
@@ -1805,6 +1813,7 @@ static const struct mmc_host_ops sdhci_ops = {
.request = sdhci_request,
.set_ios = sdhci_set_ios,
.get_ro = sdhci_get_ro,
+ .hw_reset = sdhci_hw_reset,
.enable_sdio_irq = sdhci_enable_sdio_irq,
.start_signal_voltage_switch = sdhci_start_signal_voltage_switch,
.execute_tuning = sdhci_execute_tuning,
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 745c42f..7bd919c 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -273,7 +273,7 @@ struct sdhci_ops {
void (*platform_reset_enter)(struct sdhci_host *host, u8 mask);
void (*platform_reset_exit)(struct sdhci_host *host, u8 mask);
int (*set_uhs_signaling)(struct sdhci_host *host, unsigned int uhs);
-
+ void (*hw_reset)(struct sdhci_host *host);
};

#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
--
1.7.6