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SubjectRe: [PATCH v4 4/9] staging:iio:ad7780: add chip ID values and mask
On Sun, 3 Mar 2019 11:01:09 -0300
Renato Lui Geh <renatogeh@gmail.com> wrote:

> On 03/01, Ardelean, Alexandru wrote:
> >On Thu, 2019-02-28 at 11:24 -0300, Renato Lui Geh wrote:
> >>
> >>
> >> The ad7780 supports both the ad778x and ad717x families. Each chip has
> >> a corresponding ID. This patch provides a mask for extracting ID values
> >> from the status bits and also macros for the correct values for the
> >> ad7170, ad7171, ad7780 and ad7781.
> >>
> >> Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
> >> ---
> >> drivers/staging/iio/adc/ad7780.c | 8 ++++++--
> >> 1 file changed, 6 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/drivers/staging/iio/adc/ad7780.c
> >> b/drivers/staging/iio/adc/ad7780.c
> >> index 56c49e28f432..ad7617a3a141 100644
> >> --- a/drivers/staging/iio/adc/ad7780.c
> >> +++ b/drivers/staging/iio/adc/ad7780.c
> >> @@ -26,10 +26,14 @@
> >> #define AD7780_RDY BIT(7)
> >> #define AD7780_FILTER BIT(6)
> >> #define AD7780_ERR BIT(5)
> >> -#define AD7780_ID1 BIT(4)
> >> -#define AD7780_ID0 BIT(3)
> >> #define AD7780_GAIN BIT(2)
> >>
> >> +#define AD7170_ID 0
> >> +#define AD7171_ID 1
> >> +#define AD7780_ID 1
> >> +#define AD7781_ID 0
> >> +
> >> +#define AD7780_ID_MASK (BIT(3) | BIT(4))
> >
> >This also doesn't have any functionality change.
> >The AD7170_ID, AD7171_ID, AD7780_ID & AD7781_ID IDs are also unused (maybe
> >in a later patch they are ?).
>
> They aren't. I added them following a previous review suggestion. Should
> I remove them?

Can we check them? It's always useful to confirm that the device is
the one you think it is. Then we can either use what is there
with a suitable warning, or if that is tricky just fault out as the
dt is giving us the wrong part number.

J

> >
> >I would also leave the AD7780_ID1 & AD7780_ID0 definitions in place, since
> >they're easier matched with the datasheet.
> >
> >>
> >> #define AD7780_PATTERN_GOOD 1
> >> #define AD7780_PATTERN_MASK GENMASK(1, 0)
> >> --
> >> 2.21.0
> >>

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