[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, 9 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/pxa2xx.c b/arch/arm/mach-pxa/pxa2xx.c
index d4f6415e8413..d93d3e6a6e27 100644
--- a/arch/arm/mach-pxa/pxa2xx.c
+++ b/arch/arm/mach-pxa/pxa2xx.c
@@ -14,10 +14,19 @@
 #include <linux/kernel.h>
 #include <linux/device.h>
 
+#include <asm/hardware.h>
+#include <asm/arch/pxa2xx-regs.h>
 #include <asm/arch/mfp-pxa2xx.h>
 #include <asm/arch/mfp-pxa25x.h>
+#include <asm/arch/reset.h>
 #include <asm/arch/irda.h>
 
+void pxa2xx_clear_reset_status(unsigned int mask)
+{
+        /* RESET_STATUS_* has a 1:1 mapping with RCSR */
+        RCSR = mask;
+}
+
 static unsigned long pxa2xx_mfp_fir[] = {
         GPIO46_FICP_RXD,
         GPIO47_FICP_TXD,