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From:   Vitor Soares <Vitor.Soares@synopsys.com>
To:     Jonathan Cameron <jic23@kernel.org>
CC:     "linux-iio@vger.kernel.org" <linux-iio@vger.kernel.org>,
        "linux-i3c@lists.infradead.org" <linux-i3c@lists.infradead.org>,
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        "rafael@kernel.org" <rafael@kernel.org>,
        "bbrezillon@kernel.org" <bbrezillon@kernel.org>,
        "Joao.Pinto@synopsys.com" <Joao.Pinto@synopsys.com>
Subject: RE: [PATCH v6 2/2] iio: imu: st_lsm6dsx: add i3c basic support for
 LSM6DSO and LSM6DSR
Thread-Topic: [PATCH v6 2/2] iio: imu: st_lsm6dsx: add i3c basic support for
 LSM6DSO and LSM6DSR
Thread-Index: AQHVPjZGdWz6T7t9ZkKVb9XC8/rtK6bVU8UAgGeaouA=
Date:   Wed, 25 Sep 2019 15:35:10 +0000
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Hi Jonathan,

From: Jonathan Cameron <jic23@kernel.org>
Date: Sun, Jul 21, 2019 at 18:16:56

> On Fri, 19 Jul 2019 15:30:55 +0200
> Vitor Soares <Vitor.Soares@synopsys.com> wrote:
>=20
> > For today the st_lsm6dsx driver support LSM6DSO and LSM6DSR sensor only=
 in
> > spi and i2c mode.
> >=20
> > The LSM6DSO and LSM6DSR are also i3c capable so let's give i3c support =
to
> > them.
> >=20
> > Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
> > Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
> > Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
> Great. I'll pick this up once Boris has that immutable branch
> available. Give me a poke if I seem to have lost it!
>=20
> Thanks,
>=20
> Jonathan

I didn't see the i3c support for st_lsm6dsx driver in pull request, could=20
you please check it?

Best regards,
Vitor Soares

> > ---
> > Changes in v6:
> >   none
> >=20
> > Changes in v5:
> >   Move regmap_config declaration inside st_lsm6dsx_i3c_probe()
> >   Fix warning [-Wint-to-void-pointer-cast] when compiling in 64-bit arc=
h
> >=20
> > Changes in v4:
> >   Remove hw_id variable
> >=20
> > Changes in v3:
> >   Remove unnecessary st_lsm6dsx_i3c_data table used to hold device name
> >   Use st_lsm6dsx_probe new form
> >=20
> > Changes in v2:
> >   Add support for LSM6DSR
> >   Set pm_ops to st_lsm6dsx_pm_ops
> >=20
> >  drivers/iio/imu/st_lsm6dsx/Kconfig          |  8 +++-
> >  drivers/iio/imu/st_lsm6dsx/Makefile         |  1 +
> >  drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c | 57 +++++++++++++++++++++=
++++++++
> >  3 files changed, 65 insertions(+), 1 deletion(-)
> >  create mode 100644 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> >=20
> > diff --git a/drivers/iio/imu/st_lsm6dsx/Kconfig b/drivers/iio/imu/st_ls=
m6dsx/Kconfig
> > index 9e59297..6b5a73c 100644
> > --- a/drivers/iio/imu/st_lsm6dsx/Kconfig
> > +++ b/drivers/iio/imu/st_lsm6dsx/Kconfig
> > @@ -1,11 +1,12 @@
> > =20
> >  config IIO_ST_LSM6DSX
> >  	tristate "ST_LSM6DSx driver for STM 6-axis IMU MEMS sensors"
> > -	depends on (I2C || SPI)
> > +	depends on (I2C || SPI || I3C)
> >  	select IIO_BUFFER
> >  	select IIO_KFIFO_BUF
> >  	select IIO_ST_LSM6DSX_I2C if (I2C)
> >  	select IIO_ST_LSM6DSX_SPI if (SPI_MASTER)
> > +	select IIO_ST_LSM6DSX_I3C if (I3C)
> >  	help
> >  	  Say yes here to build support for STMicroelectronics LSM6DSx imu
> >  	  sensor. Supported devices: lsm6ds3, lsm6ds3h, lsm6dsl, lsm6dsm,
> > @@ -23,3 +24,8 @@ config IIO_ST_LSM6DSX_SPI
> >  	tristate
> >  	depends on IIO_ST_LSM6DSX
> >  	select REGMAP_SPI
> > +
> > +config IIO_ST_LSM6DSX_I3C
> > +	tristate
> > +	depends on IIO_ST_LSM6DSX
> > +	select REGMAP_I3C
> > diff --git a/drivers/iio/imu/st_lsm6dsx/Makefile b/drivers/iio/imu/st_l=
sm6dsx/Makefile
> > index e5f733c..c676965 100644
> > --- a/drivers/iio/imu/st_lsm6dsx/Makefile
> > +++ b/drivers/iio/imu/st_lsm6dsx/Makefile
> > @@ -4,3 +4,4 @@ st_lsm6dsx-y :=3D st_lsm6dsx_core.o st_lsm6dsx_buffer.o=
 \
> >  obj-$(CONFIG_IIO_ST_LSM6DSX) +=3D st_lsm6dsx.o
> >  obj-$(CONFIG_IIO_ST_LSM6DSX_I2C) +=3D st_lsm6dsx_i2c.o
> >  obj-$(CONFIG_IIO_ST_LSM6DSX_SPI) +=3D st_lsm6dsx_spi.o
> > +obj-$(CONFIG_IIO_ST_LSM6DSX_I3C) +=3D st_lsm6dsx_i3c.o
> > diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c b/drivers/iio/=
imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> > new file mode 100644
> > index 0000000..57e6331
> > --- /dev/null
> > +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> > @@ -0,0 +1,57 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
> > + *
> > + * Author: Vitor Soares <vitor.soares@synopsys.com>
> > + */
> > +
> > +#include <linux/kernel.h>
> > +#include <linux/module.h>
> > +#include <linux/i3c/device.h>
> > +#include <linux/i3c/master.h>
> > +#include <linux/slab.h>
> > +#include <linux/of.h>
> > +#include <linux/regmap.h>
> > +
> > +#include "st_lsm6dsx.h"
> > +
> > +static const struct i3c_device_id st_lsm6dsx_i3c_ids[] =3D {
> > +	I3C_DEVICE(0x0104, 0x006C, (void *)ST_LSM6DSO_ID),
> > +	I3C_DEVICE(0x0104, 0x006B, (void *)ST_LSM6DSR_ID),
> > +	{ /* sentinel */ },
> > +};
> > +MODULE_DEVICE_TABLE(i3c, st_lsm6dsx_i3c_ids);
> > +
> > +static int st_lsm6dsx_i3c_probe(struct i3c_device *i3cdev)
> > +{
> > +	struct regmap_config st_lsm6dsx_i3c_regmap_config =3D {
> > +		.reg_bits =3D 8,
> > +		.val_bits =3D 8,
> > +	};
> > +	const struct i3c_device_id *id =3D i3c_device_match_id(i3cdev,
> > +							    st_lsm6dsx_i3c_ids);
> > +	struct regmap *regmap;
> > +
> > +	regmap =3D devm_regmap_init_i3c(i3cdev, &st_lsm6dsx_i3c_regmap_config=
);
> > +	if (IS_ERR(regmap)) {
> > +		dev_err(&i3cdev->dev, "Failed to register i3c regmap %d\n",
> > +			(int)PTR_ERR(regmap));
> > +		return PTR_ERR(regmap);
> > +	}
> > +
> > +	return st_lsm6dsx_probe(&i3cdev->dev, 0, (uintptr_t)id->data, regmap)=
;
> > +}
> > +
> > +static struct i3c_driver st_lsm6dsx_driver =3D {
> > +	.driver =3D {
> > +		.name =3D "st_lsm6dsx_i3c",
> > +		.pm =3D &st_lsm6dsx_pm_ops,
> > +	},
> > +	.probe =3D st_lsm6dsx_i3c_probe,
> > +	.id_table =3D st_lsm6dsx_i3c_ids,
> > +};
> > +module_i3c_driver(st_lsm6dsx_driver);
> > +
> > +MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
> > +MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx i3c driver");
> > +MODULE_LICENSE("GPL v2");