--- zzzz-none-000/linux-4.9.279/drivers/mmc/host/sdhci-pltfm.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-arm-6591-750/linux-4.9.279/drivers/mmc/host/sdhci-pltfm.c	2023-02-08 10:58:13.000000000 +0000
@@ -27,6 +27,10 @@
  *
  * Inspired by sdhci-pci.c, by Pierre Ossman
  */
+/* 
+ * Includes Intel Corporation's changes/modifications dated: 2014. 
+ * Changed/modified portions - Copyright © 2012-2017 , Intel Corporation.
+ */ 
 
 #include <linux/err.h>
 #include <linux/module.h>
@@ -123,7 +127,18 @@
 	int irq, ret;
 
 	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+#ifndef CONFIG_ARCH_GEN3
+/*
+    in Puma we do not use ioremap, ioumap, request_mem_region and release_mem_region - virtual addresses are
+    predefined.
+*/
 	ioaddr = devm_ioremap_resource(&pdev->dev, iomem);
+#else
+	/* Get virtual address */
+	ioaddr = (unsigned int __iomem *)(iomem->start);
+#endif
+
 	if (IS_ERR(ioaddr)) {
 		ret = PTR_ERR(ioaddr);
 		goto err;
@@ -186,7 +201,17 @@
 
 	sdhci_get_of_property(pdev);
 
+#ifdef CONFIG_ARCH_GEN3
+	MMC_LOCK_HW_MUTEX(host->mmc);
+    pr_info("sdhci-pltfm: For dual boot with APP-CPU, disable all writes to host controller during initialization \n");
+    host->flags |= SDHCI_DISABLE_REGISTER_WRITE;  /* For non-destructive initialization, disable all writes to host controller */
+#endif
 	ret = sdhci_add_host(host);
+#ifdef CONFIG_ARCH_GEN3
+    host->flags &= ~SDHCI_DISABLE_REGISTER_WRITE;  /* enable writes to host controller */
+    MMC_UNLOCK_HW_MUTEX(host->mmc);
+#endif
+
 	if (ret)
 		sdhci_pltfm_free(pdev);