From: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Date: Thu, 26 Jun 2025 06:24:40 +0000 (+0530)
Subject: mmc: zynq_sdhci: Reset the host controller
X-Git-Tag: v2025.10-rc1~131^2~14
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b7146855774e0b9653f027b80cfcd865db626748;p=thirdparty%2Fu-boot.git

mmc: zynq_sdhci: Reset the host controller

Reset the host controller at the early stage of probe so that the
configuration will be done properly for reboot cases.

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Link: https://lore.kernel.org/r/20250626062440.295301-1-venkatesh.abbarapu@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
---

diff --git a/drivers/mmc/zynq_sdhci.c b/drivers/mmc/zynq_sdhci.c
index 2375b15539b..3b682918b03 100644
--- a/drivers/mmc/zynq_sdhci.c
+++ b/drivers/mmc/zynq_sdhci.c
@@ -1127,6 +1127,28 @@ static int arasan_sdhci_probe(struct udevice *dev)
 	if (arasan_sdhci_is_compatible(dev, SDHCI_COMPATIBLE_VERSAL_NET_EMMC))
 		priv->internal_phy_reg = true;
 
+	ret = reset_get_bulk(dev, &priv->resets);
+	if (ret == -ENOTSUPP || ret == -ENOENT) {
+		dev_warn(dev, "Reset not found\n");
+	} else if (ret) {
+		dev_err(dev, "Reset failed\n");
+		return ret;
+	}
+
+	if (!ret) {
+		ret = reset_assert_bulk(&priv->resets);
+		if (ret) {
+			dev_err(dev, "Reset assert failed\n");
+			return ret;
+		}
+
+		ret = reset_deassert_bulk(&priv->resets);
+		if (ret) {
+			dev_err(dev, "Reset release failed\n");
+			return ret;
+		}
+	}
+
 	ret = clk_get_by_index(dev, 0, &clk);
 	if (ret < 0) {
 		dev_err(dev, "failed to get clock\n");