ARM: 6311/2: mmci: work with only one irq

The DBx500 variants have only one IRQ line hooked up.  Allow these (and
any other implementations which choose to use only one irq) to work by
directing the PIO interrupts also to the first IRQ line.

Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/mmc/host/mmci.h

@@ -139,6 +139,11 @@
 	MCI_DATATIMEOUTMASK|MCI_TXUNDERRUNMASK|MCI_RXOVERRUNMASK|	\
 	MCI_CMDRESPENDMASK|MCI_CMDSENTMASK|MCI_DATABLOCKENDMASK)
 
+/* These interrupts are directed to IRQ1 when two IRQ lines are available */
+#define MCI_IRQ1MASK \
+	(MCI_RXFIFOHALFFULLMASK | MCI_RXDATAAVLBLMASK | \
+	 MCI_TXFIFOHALFEMPTYMASK)
+
 #define NR_SG		16
 
 struct clk;
@@ -154,6 +159,7 @@ struct mmci_host {
 	int			gpio_cd;
 	int			gpio_wp;
 	int			gpio_cd_irq;
+	bool			singleirq;
 
 	unsigned int		data_xfered;