linux-kernel - [PATCH v2 6/6] iio: bmg160: Add SPI driver

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Message-Id: <1438686179-18635-7-git-send-email-mpa@pengutronix.de>
Date:	Tue,  4 Aug 2015 13:02:59 +0200
From:	Markus Pargmann <mpa@...gutronix.de>
To:	Jonathan Cameron <jic23@...nel.org>
Cc:	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Vlad Dogaru <vlad.dogaru@...el.com>,
	Paul Bolle <pebolle@...cali.nl>, linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel@...gutronix.de,
	Markus Pargmann <mpa@...gutronix.de>
Subject: [PATCH v2 6/6] iio: bmg160: Add SPI driver

Signed-off-by: Markus Pargmann <mpa@...gutronix.de>
---
 drivers/iio/gyro/Kconfig      | 11 ++++++++
 drivers/iio/gyro/Makefile     |  1 +
 drivers/iio/gyro/bmg160_spi.c | 60 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 72 insertions(+)
 create mode 100644 drivers/iio/gyro/bmg160_spi.c

diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig
index 1e6cfff5546f..420aea844216 100644
--- a/drivers/iio/gyro/Kconfig
+++ b/drivers/iio/gyro/Kconfig
@@ -72,6 +72,17 @@ config BMG160_I2C
 	  This driver can also be built as a module.  If so, the module
 	  will be called bmg160_i2c.
 
+config BMG160_SPI
+	tristate "Driver for connection via SPI"
+	depends on SPI
+	select REGMAP_SPI
+	help
+	  Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
+	  driver connected via SPI. This driver also supports BMI055 gyroscope.
+
+	  This driver can also be built as a module.  If so, the module
+	  will be called bmg160_spi.
+
 endif
 
 config HID_SENSOR_GYRO_3D
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..4dcef65f3476
--- /dev/null
+++ b/drivers/iio/gyro/bmg160_spi.c
@@ -0,0 +1,60 @@
+#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,
+	.read_flag_mask = 0x80,
+
+	.use_single_rw = true,
+	.cache_type = REGCACHE_NONE,
+};
+
+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");
-- 
2.1.4

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