[ARM] pxa: Fix RCSR handling

Related to d3930614e68bdf83a120d904c039a64e9f75dba1.

RCSR is only present on PXA2xx CPUs, not on PXA3xx CPUs.  Therefore,
we should not be unconditionally writing to RCSR from generic code.

Since we now clear the RCSR status from the SoC specific PXA PM code
and before reset in the arch_reset() function, the duplication in
the corgi, poodle, spitz and tosa code can be removed.

Acked-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

9 files changed, 8 insertions, 17 deletions

diff --git a/arch/arm/mach-pxa/corgi.c b/arch/arm/mach-pxa/corgi.c
index 259ca821e46..b757dd75665 100644
--- a/arch/arm/mach-pxa/corgi.c
+++ b/arch/arm/mach-pxa/corgi.c
@@ -493,8 +493,6 @@ static struct platform_device *devices[] __initdata = {
 
 static void corgi_poweroff(void)
 {
-	RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
-
 	if (!machine_is_corgi())
 		/* Green LED off tells the bootloader to halt */
 		reset_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_LED_GREEN);
@@ -503,8 +501,6 @@ static void corgi_poweroff(void)
 
 static void corgi_restart(char mode)
 {
-	RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
-
 	if (!machine_is_corgi())
 		/* Green LED on tells the bootloader to reboot */
 		set_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_LED_GREEN);
diff --git a/arch/arm/mach-pxa/pm.c b/arch/arm/mach-pxa/pm.c
index 329df2152dc..7d4debbdcca 100644
--- a/arch/arm/mach-pxa/pm.c
+++ b/arch/arm/mach-pxa/pm.c
@@ -46,9 +46,6 @@ int pxa_pm_enter(suspend_state_t state)
 			sleep_save_checksum += sleep_save[i];
 	}
 
-	/* Clear reset status */
-	RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
-
 	/* *** go zzz *** */
 	pxa_cpu_pm_fns->enter(state);
 	cpu_init();
diff --git a/arch/arm/mach-pxa/poodle.c b/arch/arm/mach-pxa/poodle.c
index ca5ac196b47..0b30f25cff3 100644
--- a/arch/arm/mach-pxa/poodle.c
+++ b/arch/arm/mach-pxa/poodle.c
@@ -326,13 +326,11 @@ static struct platform_device *devices[] __initdata = {
 
 static void poodle_poweroff(void)
 {
-	RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
 	arm_machine_restart('h');
 }
 
 static void poodle_restart(char mode)
 {
-	RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
 	arm_machine_restart('h');
 }
 
diff --git a/arch/arm/mach-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c
index 3642f81f8f0..e5b417d14bb 100644
--- a/arch/arm/mach-pxa/pxa25x.c
+++ b/arch/arm/mach-pxa/pxa25x.c
@@ -198,6 +198,9 @@ static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
 
 static void pxa25x_cpu_pm_enter(suspend_state_t state)
 {
+	/* Clear reset status */
+	RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
+
 	switch (state) {
 	case PM_SUSPEND_MEM:
 		/* set resume return address */
diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c
index 505dccaa51f..7e945836e12 100644
--- a/arch/arm/mach-pxa/pxa27x.c
+++ b/arch/arm/mach-pxa/pxa27x.c
@@ -249,6 +249,9 @@ void pxa27x_cpu_pm_enter(suspend_state_t state)
 	/* Clear edge-detect status register. */
 	PEDR = 0xDF12FE1B;
 
+	/* Clear reset status */
+	RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
+
 	switch (state) {
 	case PM_SUSPEND_STANDBY:
 		pxa_cpu_standby();
diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index 62a02c3927c..e7d0fcd9b43 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -529,8 +529,6 @@ static struct platform_device *devices[] __initdata = {
 
 static void spitz_poweroff(void)
 {
-	RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
-
 	pxa_gpio_mode(SPITZ_GPIO_ON_RESET | GPIO_OUT);
 	GPSR(SPITZ_GPIO_ON_RESET) = GPIO_bit(SPITZ_GPIO_ON_RESET);
 
diff --git a/arch/arm/mach-pxa/spitz_pm.c b/arch/arm/mach-pxa/spitz_pm.c
index 7a7f5f947cc..23f050feb20 100644
--- a/arch/arm/mach-pxa/spitz_pm.c
+++ b/arch/arm/mach-pxa/spitz_pm.c
@@ -119,9 +119,6 @@ static void spitz_presuspend(void)
 	/* nRESET_OUT Disable */
 	PSLR |= PSLR_SL_ROD;
 
-	/* Clear reset status */
-	RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
-
 	/* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
 	PCFR = PCFR_GPR_EN | PCFR_OPDE;
 }
diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
index 6458f6d371d..c2cbd66db81 100644
--- a/arch/arm/mach-pxa/tosa.c
+++ b/arch/arm/mach-pxa/tosa.c
@@ -467,8 +467,6 @@ static struct platform_device *devices[] __initdata = {
 
 static void tosa_poweroff(void)
 {
-	RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
-
 	pxa_gpio_mode(TOSA_GPIO_ON_RESET | GPIO_OUT);
 	GPSR(TOSA_GPIO_ON_RESET) = GPIO_bit(TOSA_GPIO_ON_RESET);
 
diff --git a/include/asm-arm/arch-pxa/system.h b/include/asm-arm/arch-pxa/system.h
index a758a719180..9aa6c2e939e 100644
--- a/include/asm-arm/arch-pxa/system.h
+++ b/include/asm-arm/arch-pxa/system.h
@@ -22,7 +22,8 @@ static inline void arch_idle(void)
 
 static inline void arch_reset(char mode)
 {
-	RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
+	if (cpu_is_pxa2xx())
+		RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
 
 	if (mode == 's') {
 		/* Jump into ROM at address 0 */