linux-kernel - [PATCH v4 2/2] iio: bmg160: Add SPI driver

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Date:	Wed, 19 Aug 2015 14:12:46 +0200
From:	Markus Pargmann <mpa@...gutronix.de>
To:	Jonathan Cameron <jic23@...nel.org>
Cc:	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Irina Tirdea <irina.tirdea@...el.com>,
	Vlad Dogaru <vlad.dogaru@...el.com>, linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel@...gutronix.de,
	Markus Pargmann <mpa@...gutronix.de>
Subject: [PATCH v4 2/2] iio: bmg160: Add SPI driver

Signed-off-by: Markus Pargmann <mpa@...gutronix.de>
---
 drivers/iio/gyro/Kconfig      |  7 +++++-
 drivers/iio/gyro/Makefile     |  1 +
 drivers/iio/gyro/bmg160_spi.c | 57 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 64 insertions(+), 1 deletion(-)
 create mode 100644 drivers/iio/gyro/bmg160_spi.c

diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig
index 94526b13d49f..e816d29d6a62 100644
--- a/drivers/iio/gyro/Kconfig
+++ b/drivers/iio/gyro/Kconfig
@@ -56,18 +56,23 @@ config BMG160
 	select IIO_BUFFER
 	select IIO_TRIGGERED_BUFFER
 	select BMG160_I2C if (I2C)
+	select BMG160_SPI if (SPI)
 	help
 	  Say yes here to build support for BOSCH BMG160 Tri-axis Gyro Sensor
 	  driver connected via I2C or SPI. This driver also supports BMI055
 	  gyroscope.
 
 	  This driver can also be built as a module.  If so, the module
-	  will be called bmg160_i2c.
+	  will be called bmg160_i2c or bmg160_spi.
 
 config BMG160_I2C
 	tristate
 	select REGMAP_I2C
 
+config BMG160_SPI
+	tristate
+	select REGMAP_SPI
+
 config HID_SENSOR_GYRO_3D
 	depends on HID_SENSOR_HUB
 	select IIO_BUFFER
diff --git a/drivers/iio/gyro/Makefile b/drivers/iio/gyro/Makefile
index 608401041550..f866a4be0667 100644
--- a/drivers/iio/gyro/Makefile
+++ b/drivers/iio/gyro/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_ADIS16260) += adis16260.o
 obj-$(CONFIG_ADXRS450) += adxrs450.o
 obj-$(CONFIG_BMG160) += bmg160_core.o
 obj-$(CONFIG_BMG160_I2C) += bmg160_i2c.o
+obj-$(CONFIG_BMG160_SPI) += bmg160_spi.o
 
 obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o
 
diff --git a/drivers/iio/gyro/bmg160_spi.c b/drivers/iio/gyro/bmg160_spi.c
new file mode 100644
index 000000000000..021ea5fe6a37
--- /dev/null
+++ b/drivers/iio/gyro/bmg160_spi.c
@@ -0,0 +1,57 @@
+#include <linux/spi/spi.h>
+#include <linux/regmap.h>
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+
+#include "bmg160.h"
+
+static const struct regmap_config bmg160_regmap_spi_conf = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 0x3f,
+};
+
+static int bmg160_spi_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, &bmg160_regmap_spi_conf);
+	if (IS_ERR(regmap)) {
+		dev_err(&spi->dev, "Failed to register spi regmap %d\n",
+			(int)PTR_ERR(regmap));
+		return PTR_ERR(regmap);
+	}
+
+	return bmg160_core_probe(&spi->dev, regmap, spi->irq, id->name);
+}
+
+static int bmg160_spi_remove(struct spi_device *spi)
+{
+	bmg160_core_remove(&spi->dev);
+
+	return 0;
+}
+
+static const struct spi_device_id bmg160_spi_id[] = {
+	{"bmg160", 0},
+	{"bmi055_gyro", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(spi, bmg160_spi_id);
+
+static struct spi_driver bmg160_spi_driver = {
+	.driver = {
+		.name	= "bmg160_spi",
+		.pm	= &bmg160_pm_ops,
+	},
+	.probe		= bmg160_spi_probe,
+	.remove		= bmg160_spi_remove,
+	.id_table	= bmg160_spi_id,
+};
+module_spi_driver(bmg160_spi_driver);
+
+MODULE_AUTHOR("Markus Pargmann <mpa@...gutronix.de>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("BMG160 SPI Gyro driver");
-- 
2.4.6

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