arm/imx: change mxc_init_l2x0() to an imx31/35 specific call

The mxc_init_l2x0() should really be an imx31/35 specific call.
The patch removes early_initcall from mxc_init_l2x0() and get imx31
and imx35 soc specific function calls mxc_init_l2x0(), so that it's
not necessarily to be called for all imx socs when we build single
image for multiple imx socs.

Thus the function can be renamed to imx3_init_l2x0() and put into
mm-imx3.c.  It also changes the return type from integer to void.
From what I see, the integer was picked just to satisfy early_initcall
prototype.

With the patch 'ARM: l2x0: add empty l2x0_of_init' applied, the code
compiles even without CONFIG_CACHE_L2X0 enabled.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 38 insertions, 57 deletions

diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index 8ec4a4ca1489..0aa86d22236b 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -10,7 +10,6 @@ obj-$(CONFIG_MACH_MX27) += clock-imx27.o mm-imx27.o ehci-imx27.o
 
 obj-$(CONFIG_SOC_IMX31) += mm-imx3.o cpu-imx31.o clock-imx31.o iomux-imx31.o ehci-imx31.o
 obj-$(CONFIG_SOC_IMX35) += mm-imx3.o cpu-imx35.o clock-imx35.o ehci-imx35.o
-obj-$(CONFIG_CACHE_L2X0) += cache-l2x0.o
 
 # Support for CMOS sensor interface
 obj-$(CONFIG_MX1_VIDEO) += mx1-camera-fiq.o mx1-camera-fiq-ksym.o
diff --git a/arch/arm/mach-imx/cache-l2x0.c b/arch/arm/mach-imx/cache-l2x0.c
deleted file mode 100644
index 69d1322add3c..000000000000
--- a/arch/arm/mach-imx/cache-l2x0.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * Copyright (C) 2009-2010 Pengutronix
- * Sascha Hauer <s.hauer@pengutronix.de>
- * Juergen Beisert <j.beisert@pengutronix.de>
- *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License version 2 as published by the
- * Free Software Foundation.
- */
-
-#include <linux/init.h>
-#include <linux/err.h>
-#include <linux/kernel.h>
-
-#include <asm/hardware/cache-l2x0.h>
-
-#include <mach/hardware.h>
-
-static int mxc_init_l2x0(void)
-{
-        void __iomem *l2x0_base;
-        void __iomem *clkctl_base;
-
-        if (!cpu_is_mx31() && !cpu_is_mx35())
-                return 0;
-
-/*
- * First of all, we must repair broken chip settings. There are some
- * i.MX35 CPUs in the wild, comming with bogus L2 cache settings. These
- * misconfigured CPUs will run amok immediately when the L2 cache gets enabled.
- * Workaraound is to setup the correct register setting prior enabling the
- * L2 cache. This should not hurt already working CPUs, as they are using the
- * same value.
- */
-#define L2_MEM_VAL 0x10
-
-        clkctl_base = ioremap(MX35_CLKCTL_BASE_ADDR, 4096);
-        if (clkctl_base != NULL) {
-                writel(0x00000515, clkctl_base + L2_MEM_VAL);
-                iounmap(clkctl_base);
-        } else {
-                pr_err("L2 cache: Cannot fix timing. Trying to continue without\n");
-        }
-
-        l2x0_base = ioremap(MX3x_L2CC_BASE_ADDR, 4096);
-        if (IS_ERR(l2x0_base)) {
-                printk(KERN_ERR "remapping L2 cache area failed with %ld\n",
-                                PTR_ERR(l2x0_base));
-                return 0;
-        }
-
-        l2x0_init(l2x0_base, 0x00030024, 0x00000000);
-
-        return 0;
-}
-arch_initcall(mxc_init_l2x0);
diff --git a/arch/arm/mach-imx/mm-imx3.c b/arch/arm/mach-imx/mm-imx3.c
index e06eed12a7b0..ffa33b4dedde 100644
--- a/arch/arm/mach-imx/mm-imx3.c
+++ b/arch/arm/mach-imx/mm-imx3.c
@@ -21,6 +21,7 @@
 #include <linux/err.h>
 
 #include <asm/pgtable.h>
+#include <asm/hardware/cache-l2x0.h>
 #include <asm/mach/map.h>
 
 #include <mach/common.h>
@@ -29,6 +30,39 @@
 #include <mach/iomux-v3.h>
 #include <mach/irqs.h>
 
+void imx3_init_l2x0(void)
+{
+        void __iomem *l2x0_base;
+        void __iomem *clkctl_base;
+
+/*
+ * First of all, we must repair broken chip settings. There are some
+ * i.MX35 CPUs in the wild, comming with bogus L2 cache settings. These
+ * misconfigured CPUs will run amok immediately when the L2 cache gets enabled.
+ * Workaraound is to setup the correct register setting prior enabling the
+ * L2 cache. This should not hurt already working CPUs, as they are using the
+ * same value.
+ */
+#define L2_MEM_VAL 0x10
+
+        clkctl_base = ioremap(MX35_CLKCTL_BASE_ADDR, 4096);
+        if (clkctl_base != NULL) {
+                writel(0x00000515, clkctl_base + L2_MEM_VAL);
+                iounmap(clkctl_base);
+        } else {
+                pr_err("L2 cache: Cannot fix timing. Trying to continue without\n");
+        }
+
+        l2x0_base = ioremap(MX3x_L2CC_BASE_ADDR, 4096);
+        if (IS_ERR(l2x0_base)) {
+                printk(KERN_ERR "remapping L2 cache area failed with %ld\n",
+                                PTR_ERR(l2x0_base));
+                return;
+        }
+
+        l2x0_init(l2x0_base, 0x00030024, 0x00000000);
+}
+
 static struct map_desc mx31_io_desc[] __initdata = {
         imx_map_entry(MX31, X_MEMC, MT_DEVICE),
         imx_map_entry(MX31, AVIC, MT_DEVICE_NONSHARED),
@@ -102,6 +136,8 @@ void __init imx31_soc_init(void)
 {
         int to_version = mx31_revision() >> 4;
 
+        imx3_init_l2x0();
+
         mxc_register_gpio("imx31-gpio", 0, MX31_GPIO1_BASE_ADDR, SZ_16K, MX31_INT_GPIO1, 0);
         mxc_register_gpio("imx31-gpio", 1, MX31_GPIO2_BASE_ADDR, SZ_16K, MX31_INT_GPIO2, 0);
         mxc_register_gpio("imx31-gpio", 2, MX31_GPIO3_BASE_ADDR, SZ_16K, MX31_INT_GPIO3, 0);
@@ -154,6 +190,8 @@ void __init imx35_soc_init(void)
 {
         int to_version = mx35_revision() >> 4;
 
+        imx3_init_l2x0();
+
         /* i.mx35 has the i.mx31 type gpio */
         mxc_register_gpio("imx31-gpio", 0, MX35_GPIO1_BASE_ADDR, SZ_16K, MX35_INT_GPIO1, 0);
         mxc_register_gpio("imx31-gpio", 1, MX35_GPIO2_BASE_ADDR, SZ_16K, MX35_INT_GPIO2, 0);