X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;ds=sidebyside;f=arch%2Farm%2Fmach-aspeed%2Fast2500%2Fclk_ast2500.c;h=7d864a4088036b065036803f385731223e23d9db;hb=1cdb6148450e851abe1df5d7eb20aa07a409941c;hp=079909fa6462218a93ada767df11349657c443f2;hpb=c83a824e62277162ad35f52879b2316902c0eff5;p=oweals%2Fu-boot.git

diff --git a/arch/arm/mach-aspeed/ast2500/clk_ast2500.c b/arch/arm/mach-aspeed/ast2500/clk_ast2500.c
index 079909fa64..7d864a4088 100644
--- a/arch/arm/mach-aspeed/ast2500/clk_ast2500.c
+++ b/arch/arm/mach-aspeed/ast2500/clk_ast2500.c
@@ -1,11 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2016 Google, Inc
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
 #include <dm.h>
+#include <asm/io.h>
 #include <asm/arch/scu_ast2500.h>
 
 int ast_get_clk(struct udevice **devp)
@@ -28,3 +28,17 @@ void *ast_get_scu(void)
 
 	return priv->scu;
 }
+
+void ast_scu_unlock(struct ast2500_scu *scu)
+{
+	writel(SCU_UNLOCK_VALUE, &scu->protection_key);
+	while (!readl(&scu->protection_key))
+		;
+}
+
+void ast_scu_lock(struct ast2500_scu *scu)
+{
+	writel(~SCU_UNLOCK_VALUE, &scu->protection_key);
+	while (readl(&scu->protection_key))
+		;
+}