linux-kernel - Re: [PATCH v2 4/4] iio: bmc150: Add SPI driver

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Date:	Wed, 16 Sep 2015 12:01:19 +0200
From:	Markus Pargmann <mpa@...gutronix.de>
To:	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Cc:	Jonathan Cameron <jic23@...nel.org>,
	Irina Tirdea <irina.tirdea@...el.com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel@...gutronix.de
Subject: Re: [PATCH v2 4/4] iio: bmc150: Add SPI driver

On Tue, Sep 01, 2015 at 07:10:57AM -0700, Srinivas Pandruvada wrote:
> On Mon, 2015-08-31 at 17:18 +0100, Jonathan Cameron wrote:
> > On 20/08/15 13:49, Markus Pargmann wrote:
> > > Add a simple SPI driver which initializes the spi regmap for the 
> > > bmc150
> > > core driver.
> > > 
> > > Signed-off-by: Markus Pargmann <mpa@...gutronix.de>
> > Looks good to me, but clearly will have to wait for the earlier
> > patches in the series.
> > 
> > Nearly there!
> > 
> > Jonathan
> > > ---
> > >  drivers/iio/accel/Kconfig            |  5 +++
> > >  drivers/iio/accel/Makefile           |  1 +
> > >  drivers/iio/accel/bmc150-accel-spi.c | 83 
> > > ++++++++++++++++++++++++++++++++++++
> > >  3 files changed, 89 insertions(+)
> > >  create mode 100644 drivers/iio/accel/bmc150-accel-spi.c
> > > 
> > > diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
> > > index 6da4eb0db57b..56d24fa3d34a 100644
> > > --- a/drivers/iio/accel/Kconfig
> > > +++ b/drivers/iio/accel/Kconfig
> > > @@ -23,6 +23,7 @@ config BMC150_ACCEL
> > >  	select IIO_TRIGGERED_BUFFER
> > >  	select REGMAP
> > >  	select BMC150_ACCEL_I2C if I2C
> > > +	select BMC150_ACCEL_SPI if SPI
> > >  	help
> > >  	  Say yes here to build support for the following Bosch 
> > > accelerometers:
> > >  	  BMC150, BMI055, BMA250E, BMA222E, BMA255, BMA280.
> > > @@ -35,6 +36,10 @@ config BMC150_ACCEL_I2C
> > >  	tristate
> > >  	select REGMAP_I2C
> > >  
> > > +config BMC150_ACCEL_SPI
> > > +	tristate
> > > +	select REGMAP_SPI
> > > +
> > >  config HID_SENSOR_ACCEL_3D
> > >  	depends on HID_SENSOR_HUB
> > >  	select IIO_BUFFER
> > > diff --git a/drivers/iio/accel/Makefile 
> > > b/drivers/iio/accel/Makefile
> > > index 5ef8bdbad092..e579e93bf022 100644
> > > --- a/drivers/iio/accel/Makefile
> > > +++ b/drivers/iio/accel/Makefile
> > > @@ -6,6 +6,7 @@
> > >  obj-$(CONFIG_BMA180) += bma180.o
> > >  obj-$(CONFIG_BMC150_ACCEL) += bmc150-accel-core.o
> > >  obj-$(CONFIG_BMC150_ACCEL_I2C) += bmc150-accel-i2c.o
> > > +obj-$(CONFIG_BMC150_ACCEL_SPI) += bmc150-accel-spi.o
> > >  obj-$(CONFIG_HID_SENSOR_ACCEL_3D) += hid-sensor-accel-3d.o
> > >  obj-$(CONFIG_KXCJK1013) += kxcjk-1013.o
> > >  obj-$(CONFIG_KXSD9)	+= kxsd9.o
> > > diff --git a/drivers/iio/accel/bmc150-accel-spi.c 
> > > b/drivers/iio/accel/bmc150-accel-spi.c
> > > new file mode 100644
> > > index 000000000000..1c2a4f683da4
> > > --- /dev/null
> > > +++ b/drivers/iio/accel/bmc150-accel-spi.c
> > > @@ -0,0 +1,83 @@
> > > +/*
> > > + * 3-axis accelerometer driver supporting following I2C Bosch
> > > -Sensortec chips:
> > > + *  - BMC150
> > > + *  - BMI055
> > > + *  - BMA255
> > > + *  - BMA250E
> > > + *  - BMA222E
> > > + *  - BMA280
> > > + *
> > > + * Copyright (c) 2014, Intel Corporation.
> > > + *
> > > + * This program is free software; you can redistribute it and/or 
> > > modify it
> > > + * under the terms and conditions of the GNU General Public 
> > > License,
> > > + * version 2, as published by the Free Software Foundation.
> > > + *
> > > + * This program is distributed in the hope it will be useful, but 
> > > WITHOUT
> > > + * ANY WARRANTY; without even the implied warranty of 
> > > MERCHANTABILITY or
> > > + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public 
> > > License for
> > > + * more details.
> > > + */
> Not sure If you want to carry Intel Copyright for SPI driver part. If
> you want to use change the year to 2015.

Thanks, will replace that.

Best Regards,

Markus

> > > +
> > > +#include <linux/device.h>
> > > +#include <linux/mod_devicetable.h>
> > > +#include <linux/module.h>
> > > +#include <linux/acpi.h>
> > > +#include <linux/regmap.h>
> > > +#include <linux/spi/spi.h>
> > > +
> > > +#include "bmc150-accel.h"
> > > +
> > > +static const struct regmap_config bmc150_spi_regmap_conf = {
> > > +	.reg_bits = 8,
> > > +	.val_bits = 8,
> > > +	.max_register = 0x3f,
> > > +};
> > > +
> > > +static int bmc150_accel_probe(struct spi_device *spi)
> > > +{
> > > +	struct regmap *regmap;
> > > +	const struct spi_device_id *id = spi_get_device_id(spi);
> > > +
> > > +	regmap = devm_regmap_init_spi(spi, 
> > > &bmc150_spi_regmap_conf);
> > > +	if (IS_ERR(regmap)) {
> > > +		dev_err(&spi->dev, "Failed to initialize spi 
> > > regmap\n");
> > > +		return PTR_ERR(regmap);
> > > +	}
> > > +
> > > +	return bmc150_accel_core_probe(&spi->dev, regmap, spi
> > > ->irq,
> > > +				       id->name, id->driver_data, 
> > > true);
> > > +}
> > > +
> > > +static int bmc150_accel_remove(struct spi_device *spi)
> > > +{
> > > +	return bmc150_accel_core_remove(&spi->dev);
> > > +}
> > > +
> > > +static const struct spi_device_id bmc150_accel_id[] = {
> > > +	{"bmc150_accel",	bmc150},
> > > +	{"bmi055_accel",	bmi055},
> > > +	{"bma255",		bma255},
> > > +	{"bma250e",		bma250e},
> > > +	{"bma222e",		bma222e},
> > > +	{"bma280",		bma280},
> > > +	{}
> > > +};
> > > +
> > > +MODULE_DEVICE_TABLE(spi, bmc150_accel_id);
> > > +
> > > +static struct spi_driver bmc150_accel_driver = {
> > > +	.driver = {
> > > +		.name	= "bmc150_accel_spi",
> > > +		.acpi_match_table = 
> > > ACPI_PTR(bmc150_accel_acpi_match),
> > > +		.pm	= &bmc150_accel_pm_ops,
> > > +	},
> > > +	.probe		= bmc150_accel_probe,
> > > +	.remove		= bmc150_accel_remove,
> > > +	.id_table	= bmc150_accel_id,
> > > +};
> > > +module_spi_driver(bmc150_accel_driver);
> > > +
> > > +MODULE_AUTHOR("Markus Pargmann <mpa@...gutronix.de>");
> > > +MODULE_LICENSE("GPL v2");
> > > +MODULE_DESCRIPTION("BMC150 SPI accelerometer driver");
> > > 
> > 
> 

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