Re: [PATCH v3] iio: light: apds9306: fix default sampling frequency definition

[Jonathan Cameron]

On Sat, 12 Sep 2026 20:29:36 +0930
Subhajit Ghosh <subhajit.ghosh@xxxxxxxxxxxxxx> wrote:

> On 6/9/26 1:29 pm, Jonathan Cameron wrote:
> > On Fri, 04 Sep 2026 11:19:48 +1000
> > Tsz Shan Chan <tsz.chan.dev@xxxxxxxxx> wrote:
> >   
> >> APDS9306_SAMP_FREQ_10HZ is defined as 0.
> >>
> >> According to the datasheet (Broadcom AV02-4755EN, page 11,
> >> ALS_MEAS_RATE), bits[2:0] set the measurement rate:
> >> - 000: 25ms  (40Hz)
> >> - 001: 20ms  (20Hz)
> >> - 010: 100ms (10Hz)
> >>
> >> Change APDS9306_SAMP_FREQ_10HZ from 0 to 2 to write the correct value
> >> for 10Hz.
> >>
> >> Datasheet: https://docs.broadcom.com/doc/AV02-4755EN
> >> Fixes: 620d1e6c7a3f ("iio: light: Add support for APDS9306 Light Sensor")
> >> Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxx>
> >> Signed-off-by: Tsz Shan Chan <tchan@xxxxxxxxxxxxxx>  
> > Looks correct to me, but as driver is only a few years old, I'll leave
> > some time to see if Subhajit is still about to take a look.
> > 
> > Jonathan  
> 
> Hi Tsz,
> Really good find.
> I am just trying to find out how this happened as this is not a logic or implementation error!
> Let me rig up my test setup, read back from the reg and make sure it gives 0x22 without any init.
> 
> Looks all right to me according to the datasheet and init sequence.
> Acked-by: Subhajit Ghosh <subhajit.ghosh@xxxxxxxxxxxxxx>
> 
Shout if your testing shows up anything interesting.
In meantime I've queued this up on the testing branch of iio.git and marked
it for stable

Thanks,

Jonathan

> Thanks Andy and Jonathan.
> 
> Regards,
> Subhajit Ghosh
> 
> >> ---
> >> Changes in v3:
> >> - Move datasheet URL to datasheet tag in the commit message
> >> - Link to v2: https://lore.kernel.org/r/20260903-apds9306-v2-1-e8673986ae56@xxxxxxxxxxxxxx
> >>
> >> Changes in v2:
> >> - Add datasheet link to commit message
> >> - Remove blank line in the tag block
> >> - Link to v1: https://lore.kernel.org/r/20260903-apds9306-v1-1-3f892aa4f156@xxxxxxxxxxxxxx
> >> ---
> >>   drivers/iio/light/apds9306.c | 2 +-
> >>   1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/iio/light/apds9306.c b/drivers/iio/light/apds9306.c
> >> index f681b02e4922..7dd41136734f 100644
> >> --- a/drivers/iio/light/apds9306.c
> >> +++ b/drivers/iio/light/apds9306.c
> >> @@ -61,7 +61,7 @@
> >>   #define APDS9306_NUM_REPEAT_RATES	7
> >>   #define APDS9306_INT_SRC_CLEAR	0
> >>   #define APDS9306_INT_SRC_ALS	1
> >> -#define APDS9306_SAMP_FREQ_10HZ	0
> >> +#define APDS9306_SAMP_FREQ_10HZ	2
> >>   
> >>   /**
> >>    * struct part_id_gts_multiplier - Part no. and corresponding gts multiplier
> >>
> >> ---
> >> base-commit: 940de590b839f71d6dc846160534bf202401b8b7
> >> change-id: 20260903-apds9306-bedba7b74e59
> >>
> >> Best regards,  
> >   
>