1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 3e17c62eea86..7a79dc1599e5 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2451,6 +2451,30 @@ int mmc_hw_reset(struct mmc_host *host)
 }
 EXPORT_SYMBOL(mmc_hw_reset);
 
+int mmc_sw_reset(struct mmc_host *host)
+{
+	int ret;
+
+	if (!host->card)
+		return -EINVAL;
+
+	mmc_bus_get(host);
+	if (!host->bus_ops || host->bus_dead || !host->bus_ops->sw_reset) {
+		mmc_bus_put(host);
+		return -EOPNOTSUPP;
+	}
+
+	ret = host->bus_ops->sw_reset(host);
+	mmc_bus_put(host);
+
+	if (ret)
+		pr_warn("%s: tried to SW reset card, got error %d\n",
+			mmc_hostname(host), ret);
+
+	return ret;
+}
+EXPORT_SYMBOL(mmc_sw_reset);
+
 static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
 {
 	host->f_init = freq;