ARM: pxa: Access SMEMC via virtual addresses

This is important because on PXA3xx, the physical mapping of SMEMC registers
differs from the one on PXA2xx. In order to get PCMCIA working on both PXA2xx
and PXA320, the PCMCIA driver was adjusted accordingly as well.

Also, various places in the kernel had to be patched to use
__raw_read/__raw_write.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
index 38833858cf82..57d61ee9b226 100644
--- a/arch/arm/mach-pxa/tosa.c
+++ b/arch/arm/mach-pxa/tosa.c
@@ -46,6 +46,7 @@
 #include <mach/tosa_bt.h>
 #include <mach/pxa2xx_spi.h>
 #include <mach/audio.h>
+#include <mach/smemc.h>
 
 #include <asm/mach/arch.h>
 #include <mach/tosa.h>
@@ -893,9 +894,11 @@ static void tosa_poweroff(void)
 
 static void tosa_restart(char mode, const char *cmd)
 {
+        uint32_t msc0 = __raw_readl(MSC0);
+
         /* Bootloader magic for a reboot */
-        if((MSC0 & 0xffff0000) == 0x7ff00000)
-                MSC0 = (MSC0 & 0xffff) | 0x7ee00000;
+        if((msc0 & 0xffff0000) == 0x7ff00000)
+                __raw_writel((msc0 & 0xffff) | 0x7ee00000, MSC0);
 
         tosa_poweroff();
 }