linux-kernel - Re: [PATCH] iio: imu: adis: use new `delay` structure for SPI transfer delays

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Message-ID: <5401e982a04d32ac17465fa20b34de40dd9bb622.camel@analog.com>
Date:   Tue, 10 Dec 2019 14:07:02 +0000
From:   "Ardelean, Alexandru" <alexandru.Ardelean@...log.com>
To:     "jic23@...nel.org" <jic23@...nel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>
Subject: Re: [PATCH] iio: imu: adis: use new `delay` structure for SPI
 transfer delays

On Sat, 2019-12-07 at 11:05 +0000, Jonathan Cameron wrote:
> On Wed, 4 Dec 2019 10:09:04 +0200
> Alexandru Ardelean <alexandru.ardelean@...log.com> wrote:
> 
> > In a recent change to the SPI subsystem [1], a new `delay` struct was
> > added
> > to replace the `delay_usecs`. This change replaces the current
> > `delay_secs`
> > with `delay` for this driver.
> > 
> > The `spi_transfer_delay_exec()` function [in the SPI framework] makes
> > sure
> > that both `delay_usecs` & `delay` are used (in this order to preserve
> > backwards compatibility).
> > 
> > [1] commit bebcfd272df6485 ("spi: introduce `delay` field for
> > `spi_transfer` + spi_transfer_delay_exec()")
> > 
> > Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
> I don't yet have that patch in my upstream so this will have to wait
> until
> it gets there. Give me a poke if I seem to have forgotten about it.

Ack.
Will send a V2 with a typo fix in the commit-desc in the meantime.

> 
> Thanks,
> 
> Jonathan
> 
> 
> > ---
> >  drivers/iio/imu/adis.c | 27 ++++++++++++++++++---------
> >  1 file changed, 18 insertions(+), 9 deletions(-)
> > 
> > diff --git a/drivers/iio/imu/adis.c b/drivers/iio/imu/adis.c
> > index 2cd2cc2316c6..95af67470668 100644
> > --- a/drivers/iio/imu/adis.c
> > +++ b/drivers/iio/imu/adis.c
> > @@ -38,7 +38,8 @@ int adis_write_reg(struct adis *adis, unsigned int
> > reg,
> >  			.bits_per_word = 8,
> >  			.len = 2,
> >  			.cs_change = 1,
> > -			.delay_usecs = adis->data->write_delay,
> > +			.delay.value = adis->data->write_delay,
> > +			.delay.unit = SPI_DELAY_UNIT_USECS,
> >  			.cs_change_delay.value = adis->data-
> > >cs_change_delay,
> >  			.cs_change_delay.unit = SPI_DELAY_UNIT_USECS,
> >  		}, {
> > @@ -46,7 +47,8 @@ int adis_write_reg(struct adis *adis, unsigned int
> > reg,
> >  			.bits_per_word = 8,
> >  			.len = 2,
> >  			.cs_change = 1,
> > -			.delay_usecs = adis->data->write_delay,
> > +			.delay.value = adis->data->write_delay,
> > +			.delay.unit = SPI_DELAY_UNIT_USECS,
> >  			.cs_change_delay.value = adis->data-
> > >cs_change_delay,
> >  			.cs_change_delay.unit = SPI_DELAY_UNIT_USECS,
> >  		}, {
> > @@ -54,19 +56,22 @@ int adis_write_reg(struct adis *adis, unsigned int
> > reg,
> >  			.bits_per_word = 8,
> >  			.len = 2,
> >  			.cs_change = 1,
> > -			.delay_usecs = adis->data->write_delay,
> > +			.delay.value = adis->data->write_delay,
> > +			.delay.unit = SPI_DELAY_UNIT_USECS,
> >  			.cs_change_delay.value = adis->data-
> > >cs_change_delay,
> >  			.cs_change_delay.unit = SPI_DELAY_UNIT_USECS,
> >  		}, {
> >  			.tx_buf = adis->tx + 6,
> >  			.bits_per_word = 8,
> >  			.len = 2,
> > -			.delay_usecs = adis->data->write_delay,
> > +			.delay.value = adis->data->write_delay,
> > +			.delay.unit = SPI_DELAY_UNIT_USECS,
> >  		}, {
> >  			.tx_buf = adis->tx + 8,
> >  			.bits_per_word = 8,
> >  			.len = 2,
> > -			.delay_usecs = adis->data->write_delay,
> > +			.delay.value = adis->data->write_delay,
> > +			.delay.unit = SPI_DELAY_UNIT_USECS,
> >  		},
> >  	};
> >  
> > @@ -138,7 +143,8 @@ int adis_read_reg(struct adis *adis, unsigned int
> > reg,
> >  			.bits_per_word = 8,
> >  			.len = 2,
> >  			.cs_change = 1,
> > -			.delay_usecs = adis->data->write_delay,
> > +			.delay.value = adis->data->write_delay,
> > +			.delay.unit = SPI_DELAY_UNIT_USECS,
> >  			.cs_change_delay.value = adis->data-
> > >cs_change_delay,
> >  			.cs_change_delay.unit = SPI_DELAY_UNIT_USECS,
> >  		}, {
> > @@ -146,7 +152,8 @@ int adis_read_reg(struct adis *adis, unsigned int
> > reg,
> >  			.bits_per_word = 8,
> >  			.len = 2,
> >  			.cs_change = 1,
> > -			.delay_usecs = adis->data->read_delay,
> > +			.delay.value = adis->data->read_delay,
> > +			.delay.unit = SPI_DELAY_UNIT_USECS,
> >  			.cs_change_delay.value = adis->data-
> > >cs_change_delay,
> >  			.cs_change_delay.unit = SPI_DELAY_UNIT_USECS,
> >  		}, {
> > @@ -155,14 +162,16 @@ int adis_read_reg(struct adis *adis, unsigned int
> > reg,
> >  			.bits_per_word = 8,
> >  			.len = 2,
> >  			.cs_change = 1,
> > -			.delay_usecs = adis->data->read_delay,
> > +			.delay.value = adis->data->read_delay,
> > +			.delay.unit = SPI_DELAY_UNIT_USECS,
> >  			.cs_change_delay.value = adis->data-
> > >cs_change_delay,
> >  			.cs_change_delay.unit = SPI_DELAY_UNIT_USECS,
> >  		}, {
> >  			.rx_buf = adis->rx + 2,
> >  			.bits_per_word = 8,
> >  			.len = 2,
> > -			.delay_usecs = adis->data->read_delay,
> > +			.delay.value = adis->data->read_delay,
> > +			.delay.unit = SPI_DELAY_UNIT_USECS,
> >  		},
> >  	};
> >