commit 4360bb41920ffacd4a935fa692768129ee5bef4e
author Ronen Shitrit <rshitrit@marvell.com> Tue Sep 23 15:28:10 2008 +0300
committer Nicolas Pitre <nico@cam.org> Thu Sep 25 16:29:21 2008 -0400
tree 8d5bbe15ad4c39d089ac42ab0330d8c515584f65
parent 3d014b01e54ce08d15a598f0bfb3ce597f14ca03

[ARM] Kirkwood: add support for L2 cache WB/WT selection

Feroceon L2 cache can work in eighther write through or write back mode
on Kirkwood. Add the option to configure this mode according to Kconfig.

Signed-off-by: Ronen Shitrit <rshitrit@marvell.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>

arch/arm/mach-kirkwood/common.c

diff --git a/arch/arm/mach-kirkwood/common.c b/arch/arm/mach-kirkwood/common.c
index c8516e3..85cad05 100644
--- a/arch/arm/mach-kirkwood/common.c
+++ b/arch/arm/mach-kirkwood/common.c
@@ -588,9 +588,15 @@
 	}
 }
 
-static int __init is_l2_writethrough(void)
+static void __init kirkwood_l2_init(void)
 {
-	return !!(readl(L2_CONFIG_REG) & L2_WRITETHROUGH);
+#ifdef CONFIG_CACHE_FEROCEON_L2_WRITETHROUGH
+	writel(readl(L2_CONFIG_REG) | L2_WRITETHROUGH, L2_CONFIG_REG);
+	feroceon_l2_init(1);
+#else
+	writel(readl(L2_CONFIG_REG) & ~L2_WRITETHROUGH, L2_CONFIG_REG);
+	feroceon_l2_init(0);
+#endif
 }
 
 void __init kirkwood_init(void)
@@ -605,6 +611,6 @@
 	kirkwood_setup_cpu_mbus();
 
 #ifdef CONFIG_CACHE_FEROCEON_L2
-	feroceon_l2_init(is_l2_writethrough());
+	kirkwood_l2_init();
 #endif
 }