Add 2.6.27 support to rb532, nand is not recognized, needs to be sorted out

SVN-Revision: 13224

target/linux/rb532/patches-2.6.27/003-gpio_bit_setting.patch

@@ -0,0 +1,35 @@
+The algorithm works unconditionally. If bitval is one, the first line is
+a no op and the second line sets the bit at offset position. Vice versa,
+if bitval is zero, the first line clears the bit at offset position and
+the second line is a no op.
+
+Signed-off-by: Phil Sutter <n0-1@freewrt.org>
+---
+ arch/mips/rb532/gpio.c |    6 ++----
+ 1 files changed, 2 insertions(+), 4 deletions(-)
+
+diff --git a/arch/mips/rb532/gpio.c b/arch/mips/rb532/gpio.c
+index 0e84c8a..e35cb75 100644
+--- a/arch/mips/rb532/gpio.c
++++ b/arch/mips/rb532/gpio.c
+@@ -119,13 +119,11 @@ static inline void rb532_set_bit(unsigned bitval,
+ 	unsigned long flags;
+ 	u32 val;
+ 
+-	bitval = !!bitval;              /* map parameter to {0,1} */
+-
+ 	local_irq_save(flags);
+ 
+ 	val = readl(ioaddr);
+-	val &= ~( ~bitval << offset );   /* unset bit if bitval == 0 */
+-	val |=  (  bitval << offset );   /* set bit if bitval == 1 */
++	val &= ~(!bitval << offset);   /* unset bit if bitval == 0 */
++	val |= (!!bitval << offset);   /* set bit if bitval == 1 */
+ 	writel(val, ioaddr);
+ 
+ 	local_irq_restore(flags);
+-- 
+1.5.6.4
+
+
+