[ARM] ohci-pxa27x: introduce pxa27x_clear_otgph()

Direct access to pxa27x specific register PSSR in a generic ohci driver
is no good, introduce pxa27x_clear_otgph() and move the implementation
into processor specific code.
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-pxa/pxa27x.c

@@ -34,6 +34,13 @@
 #include "devices.h"
 #include "clock.h"
 
+void pxa27x_clear_otgph(void)
+{
+	if (cpu_is_pxa27x() && (PSSR & PSSR_OTGPH))
+		PSSR |= PSSR_OTGPH;
+}
+EXPORT_SYMBOL(pxa27x_clear_otgph);
+
 /* Crystal clock: 13MHz */
 #define BASE_CLK	13000000
 

drivers/usb/host/ohci-pxa27x.c

@@ -25,7 +25,6 @@
 #include <linux/clk.h>
 
 #include <mach/hardware.h>
-#include <mach/pxa2xx-regs.h> /* FIXME: for PSSR */
 #include <mach/ohci.h>
 
 /*
@@ -182,6 +181,12 @@ static inline void pxa27x_setup_hc(struct pxaohci_platform_data *inf)
 	UHCRHDA = uhcrhda;
 }
 
+#ifdef CONFIG_CPU_PXA27x
+extern void pxa27x_clear_otgph(void);
+#else
+#define pxa27x_clear_otgph()	do {} while (0)
+#endif
+
 static int pxa27x_start_hc(struct device *dev)
 {
 	int retval = 0;
@@ -212,9 +217,7 @@ static int pxa27x_start_hc(struct device *dev)
 	UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);
 
 	/* Clear any OTG Pin Hold */
-	if (cpu_is_pxa27x() && (PSSR & PSSR_OTGPH))
-		PSSR |= PSSR_OTGPH;
-
+	pxa27x_clear_otgph();
 	return 0;
 }