linux-kernel - Re: [PATCH v3 3/6] iio: accel: adxl345: Add spi-3wire option

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Date: Mon, 25 Mar 2024 14:46:43 +0000
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: Lothar Rubusch <l.rubusch@...il.com>
CC: Jonathan Cameron <jic23@...nel.org>, <lars@...afoo.de>,
	<Michael.Hennerich@...log.com>, <robh+dt@...nel.org>,
	<krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
	<linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <eraretuya@...il.com>
Subject: Re: [PATCH v3 3/6] iio: accel: adxl345: Add spi-3wire option

On Sun, 24 Mar 2024 19:59:39 +0100
Lothar Rubusch <l.rubusch@...il.com> wrote:

> On Sun, Mar 24, 2024 at 2:32 PM Jonathan Cameron <jic23@...nel.org> wrote:
> >
> > On Sat, 23 Mar 2024 12:20:27 +0000
> > Lothar Rubusch <l.rubusch@...il.com> wrote:
> >  
> > > Add a setup function implementation to the spi module to enable
> > > spi-3wire as option when specified in the device-tree.
> > >
> > > Signed-off-by: Lothar Rubusch <l.rubusch@...il.com>
> > > ---
> > >  drivers/iio/accel/adxl345.h     |  3 +++
> > >  drivers/iio/accel/adxl345_spi.c | 12 +++++++++++-
> > >  2 files changed, 14 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/iio/accel/adxl345.h b/drivers/iio/accel/adxl345.h
> > > index 3c1ded0c2..6b84a2cee 100644
> > > --- a/drivers/iio/accel/adxl345.h
> > > +++ b/drivers/iio/accel/adxl345.h
> > > @@ -8,6 +8,9 @@
> > >  #ifndef _ADXL345_H_
> > >  #define _ADXL345_H_
> > >
> > > +#define ADXL345_REG_DATA_FORMAT              0x31
> > > +#define ADXL345_DATA_FORMAT_SPI         BIT(6) /* spi-3wire */  
> > Name it that, rather than using a comment.   No need to precisely
> > match datasheet naming - you are naming the value not the field here.
> >
> > ADXL345_DATA_FORMAT_SPI_3_WRITE perhaps?
> >  
> 
> Would you accept the following instead?
> ADXL345_DATA_FORMAT_SPI_3WIRE
> 
> In the OF binding it is SPI_3WIRE. So, from this perspective I think it would
> be consistent naming.

That's fine.  Precise naming up to you.

Jonathan

> 
> (...)
>