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Groups > linux.kernel > #1205887 > unrolled thread

[PATCH 20/20] iio: bmc150: Add SPI driver

Started byMarkus Pargmann <mpa@pengutronix.de>
First post2015-08-12 12:20 +0200
Last post2015-08-17 10:10 +0200
Articles 5 — 3 participants

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  [PATCH 20/20] iio: bmc150: Add SPI driver Markus Pargmann <mpa@pengutronix.de> - 2015-08-12 12:20 +0200
    Re: [PATCH 20/20] iio: bmc150: Add SPI driver Mark Brown <broonie@kernel.org> - 2015-08-12 14:10 +0200
      Re: [PATCH 20/20] iio: bmc150: Add SPI driver Markus Pargmann <mpa@pengutronix.de> - 2015-08-17 10:10 +0200
    Re: [PATCH 20/20] iio: bmc150: Add SPI driver Jonathan Cameron <jic23@kernel.org> - 2015-08-15 15:50 +0200
      Re: [PATCH 20/20] iio: bmc150: Add SPI driver Markus Pargmann <mpa@pengutronix.de> - 2015-08-17 10:10 +0200

#1205887 — [PATCH 20/20] iio: bmc150: Add SPI driver

FromMarkus Pargmann <mpa@pengutronix.de>
Date2015-08-12 12:20 +0200
Subject[PATCH 20/20] iio: bmc150: Add SPI driver
Message-ID<pWBiy-1oV-29@gated-at.bofh.it>
Add a simple SPI driver which initializes the spi regmap for the bmc150
core driver.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
---
 drivers/iio/accel/Kconfig            | 10 +++++
 drivers/iio/accel/Makefile           |  1 +
 drivers/iio/accel/bmc150-accel-spi.c | 86 ++++++++++++++++++++++++++++++++++++
 3 files changed, 97 insertions(+)
 create mode 100644 drivers/iio/accel/bmc150-accel-spi.c

diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
index c63e981c38ff..bdb42069a767 100644
--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -40,6 +40,16 @@ config BMC150_ACCEL_I2C
 	  Say yes here to build support for I2C communication with the
 	  mentioned accelerometer.
 
+config BMC150_ACCEL_SPI
+	tristate "SPI support"
+	depends on SPI
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	select REGMAP_SPI
+	help
+	  Say yes here to build support for SPI communication with the
+	  mentioned accelerometer.
+
 endif
 
 config HID_SENSOR_ACCEL_3D
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..c13fd2aa5f34
--- /dev/null
+++ b/drivers/iio/accel/bmc150-accel-spi.c
@@ -0,0 +1,86 @@
+/*
+ * 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.
+ */
+
+#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,
+
+	.use_single_rw = false,
+	.cache_type = REGCACHE_NONE,
+};
+
+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@pengutronix.de>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("BMC150 SPI accelerometer driver");
-- 
2.4.6

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#1205997

FromMark Brown <broonie@kernel.org>
Date2015-08-12 14:10 +0200
Message-ID<pWD10-3Uo-13@gated-at.bofh.it>
In reply to#1205887

[Multipart message — attachments visible in raw view] — view raw

On Wed, Aug 12, 2015 at 12:12:45PM +0200, Markus Pargmann wrote:

> +	.use_single_rw = false,
> +	.cache_type = REGCACHE_NONE,
> +};

No need to initialise defaults.

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#1208454

FromMarkus Pargmann <mpa@pengutronix.de>
Date2015-08-17 10:10 +0200
Message-ID<pYnEu-1sk-5@gated-at.bofh.it>
In reply to#1205997

[Multipart message — attachments visible in raw view] — view raw

On Wed, Aug 12, 2015 at 01:03:00PM +0100, Mark Brown wrote:
> On Wed, Aug 12, 2015 at 12:12:45PM +0200, Markus Pargmann wrote:
> 
> > +	.use_single_rw = false,
> > +	.cache_type = REGCACHE_NONE,
> > +};
> 
> No need to initialise defaults.

Thanks, removed those.

Best regards,

Markus

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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#1208086

FromJonathan Cameron <jic23@kernel.org>
Date2015-08-15 15:50 +0200
Message-ID<pXK0p-33T-1@gated-at.bofh.it>
In reply to#1205887
On 12/08/15 11:12, Markus Pargmann wrote:
> Add a simple SPI driver which initializes the spi regmap for the bmc150
> core driver.
> 
> Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
1 thing inline, plus the change of kconfig approach suggested for the
previous patch.

Otherwise, looks fine to me.

Srinivas, over to you for the next version :) (unless you are feeling
enthusiastic and want to take a look at this one)
> ---
>  drivers/iio/accel/Kconfig            | 10 +++++
>  drivers/iio/accel/Makefile           |  1 +
>  drivers/iio/accel/bmc150-accel-spi.c | 86 ++++++++++++++++++++++++++++++++++++
>  3 files changed, 97 insertions(+)
>  create mode 100644 drivers/iio/accel/bmc150-accel-spi.c
> 
> diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
> index c63e981c38ff..bdb42069a767 100644
> --- a/drivers/iio/accel/Kconfig
> +++ b/drivers/iio/accel/Kconfig
> @@ -40,6 +40,16 @@ config BMC150_ACCEL_I2C
>  	  Say yes here to build support for I2C communication with the
>  	  mentioned accelerometer.
>  
> +config BMC150_ACCEL_SPI
> +	tristate "SPI support"
> +	depends on SPI
> +	select IIO_BUFFER
> +	select IIO_TRIGGERED_BUFFER
> +	select REGMAP_SPI
> +	help
> +	  Say yes here to build support for SPI communication with the
> +	  mentioned accelerometer.
If you move to the config approach I suggested earlier, these options
are hidden away avoiding the need for a help message ;)
> +
>  endif
>  
>  config HID_SENSOR_ACCEL_3D
> 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..c13fd2aa5f34
> --- /dev/null
> +++ b/drivers/iio/accel/bmc150-accel-spi.c
> @@ -0,0 +1,86 @@
> +/*
> + * 3-axis accelerometer driver supporting following I2C Bosch-Sensortec chips:
Umm. Read the line above?  Spot the obvious minor point ;)

> + *  - 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.
> + */
> +
> +#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,
> +
> +	.use_single_rw = false,
> +	.cache_type = REGCACHE_NONE,
> +};
> +
> +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@pengutronix.de>");
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("BMC150 SPI accelerometer driver");
> 

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#1208458

FromMarkus Pargmann <mpa@pengutronix.de>
Date2015-08-17 10:10 +0200
Message-ID<pYnEv-1sk-21@gated-at.bofh.it>
In reply to#1208086

[Multipart message — attachments visible in raw view] — view raw

On Sat, Aug 15, 2015 at 02:47:20PM +0100, Jonathan Cameron wrote:
> On 12/08/15 11:12, Markus Pargmann wrote:
> > Add a simple SPI driver which initializes the spi regmap for the bmc150
> > core driver.
> > 
> > Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
> 1 thing inline, plus the change of kconfig approach suggested for the
> previous patch.
> 
> Otherwise, looks fine to me.
> 
> Srinivas, over to you for the next version :) (unless you are feeling
> enthusiastic and want to take a look at this one)
> > ---
> >  drivers/iio/accel/Kconfig            | 10 +++++
> >  drivers/iio/accel/Makefile           |  1 +
> >  drivers/iio/accel/bmc150-accel-spi.c | 86 ++++++++++++++++++++++++++++++++++++
> >  3 files changed, 97 insertions(+)
> >  create mode 100644 drivers/iio/accel/bmc150-accel-spi.c
> > 
> > diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
> > index c63e981c38ff..bdb42069a767 100644
> > --- a/drivers/iio/accel/Kconfig
> > +++ b/drivers/iio/accel/Kconfig
> > @@ -40,6 +40,16 @@ config BMC150_ACCEL_I2C
> >  	  Say yes here to build support for I2C communication with the
> >  	  mentioned accelerometer.
> >  
> > +config BMC150_ACCEL_SPI
> > +	tristate "SPI support"
> > +	depends on SPI
> > +	select IIO_BUFFER
> > +	select IIO_TRIGGERED_BUFFER
> > +	select REGMAP_SPI
> > +	help
> > +	  Say yes here to build support for SPI communication with the
> > +	  mentioned accelerometer.
> If you move to the config approach I suggested earlier, these options
> are hidden away avoiding the need for a help message ;)

Yes.

> > +
> >  endif
> >  
> >  config HID_SENSOR_ACCEL_3D
> > 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..c13fd2aa5f34
> > --- /dev/null
> > +++ b/drivers/iio/accel/bmc150-accel-spi.c
> > @@ -0,0 +1,86 @@
> > +/*
> > + * 3-axis accelerometer driver supporting following I2C Bosch-Sensortec chips:
> Umm. Read the line above?  Spot the obvious minor point ;)

Oh yes. Thanks.

Best regards,

Markus

> 
> > + *  - 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.
> > + */
> > +
> > +#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,
> > +
> > +	.use_single_rw = false,
> > +	.cache_type = REGCACHE_NONE,
> > +};
> > +
> > +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@pengutronix.de>");
> > +MODULE_LICENSE("GPL v2");
> > +MODULE_DESCRIPTION("BMC150 SPI accelerometer driver");
> > 
> 
> 

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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