ARM: imx: let L2 initialization be a common function

Move imx6q L2 initialization function imx6q_init_l2cache() into
system.c, and rename it imx_init_l2cache(), so that other platforms
other than imx6q can also use the function.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Dirk Behme <dirk.behme@de.bosch.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/system.c b/arch/arm/mach-imx/system.c
index 6fe81bb4d3c9..e5592cab1f6a 100644
--- a/arch/arm/mach-imx/system.c
+++ b/arch/arm/mach-imx/system.c
@@ -27,6 +27,7 @@
 #include <asm/system_misc.h>
 #include <asm/proc-fns.h>
 #include <asm/mach-types.h>
+#include <asm/hardware/cache-l2x0.h>
 
 #include "common.h"
 #include "hardware.h"
@@ -95,3 +96,35 @@ void __init mxc_arch_reset_init_dt(void)
 
         clk_prepare(wdog_clk);
 }
+
+#ifdef CONFIG_CACHE_L2X0
+static void __init imx_init_l2cache(void)
+{
+        void __iomem *l2x0_base;
+        struct device_node *np;
+        unsigned int val;
+
+        np = of_find_compatible_node(NULL, NULL, "arm,pl310-cache");
+        if (!np)
+                goto out;
+
+        l2x0_base = of_iomap(np, 0);
+        if (!l2x0_base) {
+                of_node_put(np);
+                goto out;
+        }
+
+        /* Configure the L2 PREFETCH and POWER registers */
+        val = readl_relaxed(l2x0_base + L2X0_PREFETCH_CTRL);
+        val |= 0x70800000;
+        writel_relaxed(val, l2x0_base + L2X0_PREFETCH_CTRL);
+        val = L2X0_DYNAMIC_CLK_GATING_EN | L2X0_STNDBY_MODE_EN;
+        writel_relaxed(val, l2x0_base + L2X0_POWER_CTRL);
+
+        iounmap(l2x0_base);
+        of_node_put(np);
+
+out:
+        l2x0_of_init(0, ~0UL);
+}
+#endif