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