[PATCH 1/8] mmc: sdhci-cadence: Add reset control support

[Tanmay Kathpalia]

Add reset control functionality to the SDHCI Cadence driver to properly
handle hardware reset sequences during probe. This ensures the controller
is in a known state before initialization.

Signed-off-by: Tanmay Kathpalia <tanmay.kathpalia at altera.com>
Reviewed-by: Balsundar Ponnusamy <balsundar.ponnusamy at altera.com>
---
 drivers/mmc/sdhci-cadence.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/mmc/sdhci-cadence.c b/drivers/mmc/sdhci-cadence.c
index 7d169efa476..d9fda902076 100644
--- a/drivers/mmc/sdhci-cadence.c
+++ b/drivers/mmc/sdhci-cadence.c
@@ -15,6 +15,7 @@
 #include <linux/sizes.h>
 #include <linux/libfdt.h>
 #include <mmc.h>
+#include <reset.h>
 #include <sdhci.h>
 #include "sdhci-cadence.h"
 
@@ -214,6 +215,7 @@ static int sdhci_cdns_probe(struct udevice *dev)
 	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
 	struct sdhci_cdns_plat *plat = dev_get_plat(dev);
 	struct sdhci_host *host = dev_get_priv(dev);
+	struct reset_ctl_bulk reset_bulk;
 	fdt_addr_t base;
 	int ret;
 
@@ -225,6 +227,12 @@ static int sdhci_cdns_probe(struct udevice *dev)
 	if (!plat->hrs_addr)
 		return -ENOMEM;
 
+	ret = reset_get_bulk(dev, &reset_bulk);
+	if (ret)
+		dev_warn(dev, "Can't get reset: %d\n", ret);
+	else
+		reset_deassert_bulk(&reset_bulk);
+
 	host->name = dev->name;
 	host->ioaddr = plat->hrs_addr + SDHCI_CDNS_SRS_BASE;
 	host->ops = &sdhci_cdns_ops;
-- 
2.43.7