[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>

2 files changed, 27 insertions, 0 deletions

diff --git a/include/asm-arm/arch-pxa/reset.h b/include/asm-arm/arch-pxa/reset.h
index 6ca72c5cf7db..9489a48871a8 100644
--- a/include/asm-arm/arch-pxa/reset.h
+++ b/include/asm-arm/arch-pxa/reset.h
@@ -1,6 +1,15 @@
 #ifndef __ASM_ARCH_RESET_H
 #define __ASM_ARCH_RESET_H
 
+#define RESET_STATUS_HARDWARE   (1 << 0)        /* Hardware Reset */
+#define RESET_STATUS_WATCHDOG   (1 << 1)        /* Watchdog Reset */
+#define RESET_STATUS_LOWPOWER   (1 << 2)        /* Low Power/Sleep Exit */
+#define RESET_STATUS_GPIO       (1 << 3)        /* GPIO Reset */
+#define RESET_STATUS_ALL        (0xf)
+
+extern unsigned int reset_status;
+extern void clear_reset_status(unsigned int mask);
+
 /*
  * register GPIO as reset generator
  */
diff --git a/include/asm-arm/arch-sa1100/reset.h b/include/asm-arm/arch-sa1100/reset.h
new file mode 100644
index 000000000000..f61957e6842a
--- /dev/null
+++ b/include/asm-arm/arch-sa1100/reset.h
@@ -0,0 +1,18 @@
+#ifndef __ASM_ARCH_RESET_H
+#define __ASM_ARCH_RESET_H
+
+#include "hardware.h"
+
+#define RESET_STATUS_HARDWARE   (1 << 0)        /* Hardware Reset */
+#define RESET_STATUS_WATCHDOG   (1 << 1)        /* Watchdog Reset */
+#define RESET_STATUS_LOWPOWER   (1 << 2)        /* Exit from Low Power/Sleep */
+#define RESET_STATUS_GPIO       (1 << 3)        /* GPIO Reset */
+#define RESET_STATUS_ALL        (0xf)
+
+extern unsigned int reset_status;
+static inline void clear_reset_status(unsigned int mask)
+{
+        RCSR = mask;
+}
+
+#endif /* __ASM_ARCH_RESET_H */