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mmc: sdhci-cadence: Add reset control support

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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@altera.com>
Reviewed-by: Balsundar Ponnusamy <balsundar.ponnusamy@altera.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Tanmay Kathpalia
2025-12-11 20:53:50 +08:00
committed by Peng Fan
parent 66be03b7ee
commit b033255a57
1 changed files with 6 additions and 0 deletions
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drivers/mmc/sdhci-cadence.c
+6
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@@ -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 +227,10 @@ static int sdhci_cdns_probe(struct udevice *dev)
if (!plat->hrs_addr)
return -ENOMEM;
ret = reset_get_bulk(dev, &reset_bulk);
if (!ret)
reset_deassert_bulk(&reset_bulk);
host->name = dev->name;
host->ioaddr = plat->hrs_addr + SDHCI_CDNS_SRS_BASE;
host->ops = &sdhci_cdns_ops;