From: Prasanth Babu Mantena <p-mantena@ti.com>
Date: Wed, 9 Oct 2024 14:57:00 +0000 (+0530)
Subject: mach-k3: common.c: Remove dma device in spl exit
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=c4b00537dc0d998b201807d8e660de73cdf9ca69;p=u-boot.git

mach-k3: common.c: Remove dma device in spl exit

While exiting from spl, remove any dma device active through
spl_board_prepare_for_boot(). This is required for cleaning up
any dma channels being used in spl and avoid issues with overlapping
channel allocation in the next stage bootloaders.

Signed-off-by: Prasanth Babu Mantena <p-mantena@ti.com>
---

diff --git a/arch/arm/mach-k3/common.c b/arch/arm/mach-k3/common.c
index df48ec8d47..46d3d88196 100644
--- a/arch/arm/mach-k3/common.c
+++ b/arch/arm/mach-k3/common.c
@@ -28,6 +28,8 @@
 #include <env.h>
 #include <elf.h>
 #include <soc.h>
+#include <dm/uclass-internal.h>
+#include <dm/device-internal.h>
 
 #include <asm/arch/k3-qos.h>
 
@@ -246,12 +248,32 @@ void spl_enable_cache(void)
 #endif
 }
 
-#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF))
+static __maybe_unused void k3_dma_remove(void)
+{
+	struct udevice *dev;
+	int rc;
+
+	rc = uclass_find_device(UCLASS_DMA, 0, &dev);
+	if (!rc && dev) {
+		rc = device_remove(dev, DM_REMOVE_NORMAL);
+		if (rc)
+			pr_warn("Cannot remove dma device '%s' (err=%d)\n",
+				dev->name, rc);
+	} else
+		pr_warn("DMA Device not found (err=%d)\n", rc);
+}
+
 void spl_board_prepare_for_boot(void)
 {
+#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF))
 	dcache_disable();
+#endif
+#if IS_ENABLED(CONFIG_SPL_DMA) && IS_ENABLED(CONFIG_SPL_DM_DEVICE_REMOVE)
+	k3_dma_remove();
+#endif
 }
 
+#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF))
 void spl_board_prepare_for_linux(void)
 {
 	dcache_disable();