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, 6 insertions, 4 deletions

diff --git a/arch/arm/mach-pxa/cpufreq-pxa2xx.c b/arch/arm/mach-pxa/cpufreq-pxa2xx.c
index 58093d9e07be..6a7aeab42f6c 100644
--- a/arch/arm/mach-pxa/cpufreq-pxa2xx.c
+++ b/arch/arm/mach-pxa/cpufreq-pxa2xx.c
@@ -38,8 +38,10 @@
 #include <linux/cpufreq.h>
 #include <linux/err.h>
 #include <linux/regulator/consumer.h>
+#include <linux/io.h>
 
 #include <mach/pxa2xx-regs.h>
+#include <mach/smemc.h>
 
 #ifdef DEBUG
 static unsigned int freq_debug;
@@ -242,7 +244,7 @@ static void pxa27x_guess_max_freq(void)
 
 static void init_sdram_rows(void)
 {
-        uint32_t mdcnfg = MDCNFG;
+        uint32_t mdcnfg = __raw_readl(MDCNFG);
         unsigned int drac2 = 0, drac0 = 0;
 
         if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3))
@@ -331,8 +333,8 @@ static int pxa_set_target(struct cpufreq_policy *policy,
          * we need to preset the smaller DRI before the change.  If we're
          * speeding up we need to set the larger DRI value after the change.
          */
-        preset_mdrefr = postset_mdrefr = MDREFR;
-        if ((MDREFR & MDREFR_DRI_MASK) > mdrefr_dri(new_freq_mem)) {
+        preset_mdrefr = postset_mdrefr = __raw_readl(MDREFR);
+        if ((preset_mdrefr & MDREFR_DRI_MASK) > mdrefr_dri(new_freq_mem)) {
                 preset_mdrefr = (preset_mdrefr & ~MDREFR_DRI_MASK);
                 preset_mdrefr |= mdrefr_dri(new_freq_mem);
         }
@@ -370,7 +372,7 @@ static int pxa_set_target(struct cpufreq_policy *policy,
 3:              nop                                                     \n\
           "
                      : "=&r" (unused)
-                     : "r" (&MDREFR), "r" (cclkcfg),
+                     : "r" (MDREFR), "r" (cclkcfg),
                        "r" (preset_mdrefr), "r" (postset_mdrefr)
                      : "r4", "r5");
         local_irq_restore(flags);