openwrtv4/target/linux/cns3xxx/patches-3.14/097-l2x0_cmdline_disable.patch

--- a/arch/arm/mach-cns3xxx/core.c
+++ b/arch/arm/mach-cns3xxx/core.c
@@ -273,13 +273,26 @@ void __init cns3xxx_timer_init(void)
 
 #ifdef CONFIG_CACHE_L2X0
 
-void __init cns3xxx_l2x0_init(void)
+static int cns3xxx_l2x0_enable = 1;
+
+static int __init cns3xxx_l2x0_disable(char *s)
+{
+	cns3xxx_l2x0_enable = 0;
+	return 1;
+}
+__setup("nol2x0", cns3xxx_l2x0_disable);
+
+static int __init cns3xxx_l2x0_init(void)
 {
-	void __iomem *base = ioremap(CNS3XXX_L2C_BASE, SZ_4K);
+	void __iomem *base;
 	u32 val;
 
+	if (!cns3xxx_l2x0_enable)
+		return 0;
+
+ 	base = ioremap(CNS3XXX_L2C_BASE, SZ_4K);
 	if (WARN_ON(!base))
-		return;
+		return 0;
 
 	/*
 	 * Tag RAM Control register
@@ -309,7 +322,10 @@ void __init cns3xxx_l2x0_init(void)
 
 	/* 32 KiB, 8-way, parity disable */
 	l2x0_init(base, 0x00540000, 0xfe000fff);
+
+	return 0;
 }
+arch_initcall(cns3xxx_l2x0_init);
 
 #endif /* CONFIG_CACHE_L2X0 */
 
--- a/arch/arm/mach-cns3xxx/cns3420vb.c
+++ b/arch/arm/mach-cns3xxx/cns3420vb.c
@@ -239,8 +239,6 @@ static struct platform_device *cns3420_p
 
 static void __init cns3420_init(void)
 {
-	cns3xxx_l2x0_init();
-
 	platform_add_devices(cns3420_pdevs, ARRAY_SIZE(cns3420_pdevs));
 
 	cns3xxx_ahci_init();