[PATCH] iio: dac: remove redundant variable 'shift'

[PATCH] iio: dac: remove redundant variable 'shift'

[Colin King]

From: Colin Ian King <colin.king@canonical.com>

Variable shift is being assigned but is never used hence it is
redundant and can be removed.

Cleans up two clang warnings:
warning: variable ‘shift’ set but not used [-Wunused-but-set-variable]

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/iio/dac/ti-dac5571.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/iio/dac/ti-dac5571.c b/drivers/iio/dac/ti-dac5571.c
index dd21eebed6a8..e39d1e901353 100644
--- a/drivers/iio/dac/ti-dac5571.c
+++ b/drivers/iio/dac/ti-dac5571.c
@@ -97,9 +97,6 @@ static int dac5571_cmd_quad(struct dac5571_data *data, int channel, u16 val)
 
 static int dac5571_pwrdwn_single(struct dac5571_data *data, int channel, u8 pwrdwn)
 {
-	unsigned int shift;
-
-	shift = 12 - data->spec->resolution;
 	data->buf[1] = 0;
 	data->buf[0] = pwrdwn << DAC5571_SINGLE_PWRDWN_BITS;
 
@@ -111,9 +108,6 @@ static int dac5571_pwrdwn_single(struct dac5571_data *data, int channel, u8 pwrd
 
 static int dac5571_pwrdwn_quad(struct dac5571_data *data, int channel, u8 pwrdwn)
 {
-	unsigned int shift;
-
-	shift = 16 - data->spec->resolution;
 	data->buf[2] = 0;
 	data->buf[1] = pwrdwn << DAC5571_QUAD_PWRDWN_BITS;
 	data->buf[0] = (channel << DAC5571_CHANNEL_SELECT) |
-- 
2.17.1

Re: [PATCH] iio: dac: remove redundant variable 'shift'

[Sean Nyekjær]

On 2018-07-02 12:24, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
> 
> Variable shift is being assigned but is never used hence it is
> redundant and can be removed.
> 
> Cleans up two clang warnings:
> warning: variable ‘shift’ set but not used [-Wunused-but-set-variable]
> 
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk>

Good catch :-)

BR
/Sean

Re: [PATCH] iio: dac: remove redundant variable 'shift'

[Jonathan Cameron]

On Mon, 2 Jul 2018 12:43:20 +0200
Sean Nyekjær <sean.nyekjaer@prevas.dk> wrote:

> On 2018-07-02 12:24, Colin King wrote:
> > From: Colin Ian King <colin.king@canonical.com>
> > 
> > Variable shift is being assigned but is never used hence it is
> > redundant and can be removed.
> > 
> > Cleans up two clang warnings:
> > warning: variable ‘shift’ set but not used [-Wunused-but-set-variable]
> > 
> > Signed-off-by: Colin Ian King <colin.king@canonical.com>  
> Reviewed-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk>
> 
> Good catch :-)
> 
> BR
> /Sean
Hi Colin,

As ever, thanks for the patch!

If you wouldn't mind putting the name of the driver in question in patches
like these that would be great.    There are enough drivers, that I doubt
anyone (other than me) looks at all patches for DACs.  They only look at
the particular parts they actually have on boards ;)

Applied to the togreg branch of iio.git and pushed out as testing for the
autobuilders to play with it.

Thanks,

Jonathan