[ARM] 5047/2: Support resetting by asserting GPIO pin

This adds support for resetting via assertion of GPIO pin.
This e.g. is used on Sharp Zaurus SL-6000.

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 6 insertions, 16 deletions

diff --git a/include/asm-arm/arch-pxa/hardware.h b/include/asm-arm/arch-pxa/hardware.h
index e25558faa5a4..5547ec797ad0 100644
--- a/include/asm-arm/arch-pxa/hardware.h
+++ b/include/asm-arm/arch-pxa/hardware.h
@@ -205,6 +205,11 @@ static inline void __deprecated pxa_set_cken(int clock, int enable)
  */
 extern unsigned int get_memclk_frequency_10khz(void);
 
+/*
+ * register GPIO as reset generator
+ */
+extern int init_gpio_reset(int gpio);
+
 #endif
 
 #if defined(CONFIG_MACH_ARMCORE) && defined(CONFIG_PCI)
diff --git a/include/asm-arm/arch-pxa/system.h b/include/asm-arm/arch-pxa/system.h
index 9aa6c2e939e8..14894ae3fa67 100644
--- a/include/asm-arm/arch-pxa/system.h
+++ b/include/asm-arm/arch-pxa/system.h
@@ -20,19 +20,4 @@ static inline void arch_idle(void)
 }
 
 
-static inline void arch_reset(char mode)
-{
-        if (cpu_is_pxa2xx())
-                RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
-
-        if (mode == 's') {
-                /* Jump into ROM at address 0 */
-                cpu_reset(0);
-        } else {
-                /* Initialize the watchdog and let it fire */
-                OWER = OWER_WME;
-                OSSR = OSSR_M3;
-                OSMR3 = OSCR + 368640;  /* ... in 100 ms */
-        }
-}
-
+void arch_reset(char mode);