linux-kernel - Re: [PATCH v8 1/2] Added AMS tsl2591 driver implementation

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Date:   Sun, 18 Apr 2021 23:17:00 +0100
From:   Joe Sandom <joe.g.sandom@...il.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Rob Herring <robh+dt@...nel.org>,
        linux-iio <linux-iio@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8 1/2] Added AMS tsl2591 driver implementation

On Sat, Apr 17, 2021 at 03:50:16PM +0300, Andy Shevchenko wrote:
> On Fri, Apr 16, 2021 at 8:49 PM Joe Sandom <joe.g.sandom@...il.com> wrote:
> >
> > Driver implementation for AMS/TAOS tsl2591 ambient light sensor.
> >
> > This driver supports configuration via device tree and sysfs.
> > Supported channels for raw infrared light intensity,
> > raw combined light intensity and illuminance in lux.
> > The driver additionally supports iio events on lower and
> > upper thresholds.
> >
> > This is a very-high sensitivity light-to-digital converter that
> > transforms light intensity into a digital signal.
> 
> Hmm... It's v8 and the subject line is wrongly formatted.
> Please add the corresponding prefix "iio: light: ..."
> 
Thanks for pointing that out Andy. I'll be sure to correct this in v9.

> Otherwise it's in very good shape.
> 
> ...
> 
> > +/* TSL2591 enable register definitions */
> > +#define TSL2591_PWR_ON              0x01
> > +#define TSL2591_PWR_OFF             0x00
> 
> > +#define TSL2591_ENABLE_ALS          0x02
> > +#define TSL2591_ENABLE_ALS_INT      0x10
> > +#define TSL2591_ENABLE_SLEEP_INT    0x40
> > +#define TSL2591_ENABLE_NP_INT       0x80
> 
> Is it a bitfield?
> 
> ...
> 
> > +       als_lower_l = als_lower_threshold;
> 
> >> 0, but it's up to you.
> 
> > +       als_lower_h = als_lower_threshold >> 8;
> 
> ...
> 
> > +       als_upper_l = als_upper_threshold;
> > +       als_upper_h = als_upper_threshold >> 8;
> 
> Ditto.
> 
> -- 
> With Best Regards,
> Andy Shevchenko