[ARM] pxa: introduce reset_status and clear_reset_status for driver's usage

Due to the problem of reset status bits being handled by different
registers between pxa2xx and pxa3xx, introduce a global reset_status
variable, initialized by SoC-specific code and later being used by
other drivers.

And also introduce clear_reset_status(), which is used to clear the
corresponding status bits. Pass RESET_STATUS_ALL to clear all bits.

Signed-off-by: Eric Miao <eric.miao@marvell.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/pxa3xx.c b/arch/arm/mach-pxa/pxa3xx.c
index f491025a0c82..3d36c790f5ce 100644
--- a/arch/arm/mach-pxa/pxa3xx.c
+++ b/arch/arm/mach-pxa/pxa3xx.c
@@ -24,6 +24,7 @@
 
 #include <asm/hardware.h>
 #include <asm/arch/pxa3xx-regs.h>
+#include <asm/arch/reset.h>
 #include <asm/arch/ohci.h>
 #include <asm/arch/pm.h>
 #include <asm/arch/dma.h>
@@ -109,6 +110,12 @@ unsigned int pxa3xx_get_memclk_frequency_10khz(void)
         return (clk / 10000);
 }
 
+void pxa3xx_clear_reset_status(unsigned int mask)
+{
+        /* RESET_STATUS_* has a 1:1 mapping with ARSR */
+        ARSR = mask;
+}
+
 /*
  * Return the current AC97 clock frequency.
  */
@@ -532,6 +539,9 @@ static int __init pxa3xx_init(void)
         int i, ret = 0;
 
         if (cpu_is_pxa3xx()) {
+
+                reset_status = ARSR;
+
                 /*
                  * clear RDH bit every time after reset
                  *