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

Markus Pargmann
2015-08-12T10:19:43Z

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