Re: [PATCH] comedi: dmm32at: Fix coding style - use BIT macro
From: Dan Carpenter
Date: Thu Nov 19 2015 - 02:51:53 EST
On Wed, Nov 18, 2015 at 04:26:52PM +0000, Ian Abbott wrote:
> >+#define DMM32AT_AI_CFG_SCINT_10US (BIT(5) & ~BIT(4))
> >+#define DMM32AT_AI_CFG_SCINT_5US (BIT(5) | BIT(4))
> The values of DMM32AT_AI_CFG_SCINT_20US etc. are numerically
> correct, but look a bit strange. The `(BIT(5) & ~BIT(4))` looks
> especially strange and could be changed to `BIT(5)`. These are all
> really shifted 2-bit values, so perhaps the BIT() macro isn't the
> best representation.
BIT(5) & ~BIT(4) is silly. Don't do that.
The original code was fine.
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