bcm47xx: prepare to support different buses

Prepare bcm47xx to support different System buses. Before adding
support for bcma it should be possible to build bcm47xx without the
need of ssb. With this patch bcm47xx does not directly contain a
ssb_bus, but a union contain all the supported system buses. As a SoC
just uses one system bus a union is a good choice.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 40 insertions, 15 deletions

diff --git a/arch/mips/include/asm/mach-bcm47xx/gpio.h b/arch/mips/include/asm/mach-bcm47xx/gpio.h
index 98504142124..6b78827dd14 100644
--- a/arch/mips/include/asm/mach-bcm47xx/gpio.h
+++ b/arch/mips/include/asm/mach-bcm47xx/gpio.h
@@ -21,41 +21,66 @@ extern int gpio_to_irq(unsigned gpio);
 
 static inline int gpio_get_value(unsigned gpio)
 {
-	return ssb_gpio_in(&ssb_bcm47xx, 1 << gpio);
+	switch (bcm47xx_bus_type) {
+	case BCM47XX_BUS_TYPE_SSB:
+		return ssb_gpio_in(&bcm47xx_bus.ssb, 1 << gpio);
+	}
+	return -EINVAL;
 }
 
 static inline void gpio_set_value(unsigned gpio, int value)
 {
-	ssb_gpio_out(&ssb_bcm47xx, 1 << gpio, value ? 1 << gpio : 0);
+	switch (bcm47xx_bus_type) {
+	case BCM47XX_BUS_TYPE_SSB:
+		ssb_gpio_out(&bcm47xx_bus.ssb, 1 << gpio,
+			     value ? 1 << gpio : 0);
+	}
 }
 
 static inline int gpio_direction_input(unsigned gpio)
 {
-	ssb_gpio_outen(&ssb_bcm47xx, 1 << gpio, 0);
-	return 0;
+	switch (bcm47xx_bus_type) {
+	case BCM47XX_BUS_TYPE_SSB:
+		ssb_gpio_outen(&bcm47xx_bus.ssb, 1 << gpio, 0);
+		return 0;
+	}
+	return -EINVAL;
 }
 
 static inline int gpio_direction_output(unsigned gpio, int value)
 {
-	/* first set the gpio out value */
-	ssb_gpio_out(&ssb_bcm47xx, 1 << gpio, value ? 1 << gpio : 0);
-	/* then set the gpio mode */
-	ssb_gpio_outen(&ssb_bcm47xx, 1 << gpio, 1 << gpio);
-	return 0;
+	switch (bcm47xx_bus_type) {
+	case BCM47XX_BUS_TYPE_SSB:
+		/* first set the gpio out value */
+		ssb_gpio_out(&bcm47xx_bus.ssb, 1 << gpio,
+			     value ? 1 << gpio : 0);
+		/* then set the gpio mode */
+		ssb_gpio_outen(&bcm47xx_bus.ssb, 1 << gpio, 1 << gpio);
+		return 0;
+	}
+	return -EINVAL;
 }
 
 static inline int gpio_intmask(unsigned gpio, int value)
 {
-	ssb_gpio_intmask(&ssb_bcm47xx, 1 << gpio,
-			 value ? 1 << gpio : 0);
-	return 0;
+	switch (bcm47xx_bus_type) {
+	case BCM47XX_BUS_TYPE_SSB:
+		ssb_gpio_intmask(&bcm47xx_bus.ssb, 1 << gpio,
+				 value ? 1 << gpio : 0);
+		return 0;
+	}
+	return -EINVAL;
 }
 
 static inline int gpio_polarity(unsigned gpio, int value)
 {
-	ssb_gpio_polarity(&ssb_bcm47xx, 1 << gpio,
-			  value ? 1 << gpio : 0);
-	return 0;
+	switch (bcm47xx_bus_type) {
+	case BCM47XX_BUS_TYPE_SSB:
+		ssb_gpio_polarity(&bcm47xx_bus.ssb, 1 << gpio,
+				  value ? 1 << gpio : 0);
+		return 0;
+	}
+	return -EINVAL;
 }