diff options
Diffstat (limited to 'target/linux/rb532/patches-2.6.28/003-gpio_bit_setting.patch')
| -rw-r--r-- | target/linux/rb532/patches-2.6.28/003-gpio_bit_setting.patch | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/target/linux/rb532/patches-2.6.28/003-gpio_bit_setting.patch b/target/linux/rb532/patches-2.6.28/003-gpio_bit_setting.patch new file mode 100644 index 0000000000..49f9f4b3b5 --- /dev/null +++ b/target/linux/rb532/patches-2.6.28/003-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 + + + |