On 04/08/15 18:57, H Hartley Sweeten wrote:
The comedi_lrange table for the analog inputs is inverted compared to the values that need to be written to the ME4000_AI_CHANNEL_LIST_REG to select the range. Create a macro, ME4000_AI_LIST_RANGE(), to handle the inversion. Remove the old defines and simplify the code a bit. Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx> --- drivers/staging/comedi/drivers/me4000.c | 41 ++++++++------------------------- 1 file changed, 9 insertions(+), 32 deletions(-) diff --git a/drivers/staging/comedi/drivers/me4000.c b/drivers/staging/comedi/drivers/me4000.c index c3653a35..db0a18f 100644 --- a/drivers/staging/comedi/drivers/me4000.c +++ b/drivers/staging/comedi/drivers/me4000.c @@ -111,10 +111,7 @@ broken. #define ME4000_AI_CTRL_BIT_EX_TRIG_BOTH (1 << 31) #define ME4000_AI_CHANNEL_LIST_REG 0x78 #define ME4000_AI_LIST_INPUT_DIFFERENTIAL (1 << 5) -#define ME4000_AI_LIST_RANGE_BIPOLAR_10 (0 << 6) -#define ME4000_AI_LIST_RANGE_BIPOLAR_2_5 (1 << 6) -#define ME4000_AI_LIST_RANGE_UNIPOLAR_10 (2 << 6) -#define ME4000_AI_LIST_RANGE_UNIPOLAR_2_5 (3 << 6) +#define ME4000_AI_LIST_RANGE(x) ((3 - ((x) & 3)) << 6)
You could also use '((~(x) & 3) << 6)' but yours is probably more readable! -- -=( Ian Abbott @ MEV Ltd. E-mail: <abbotti@xxxxxxxxx> )=- -=( Web: http://www.mev.co.uk/ )=- _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
