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authorRui Miguel Silva <rui.silva@linaro.org>2019-04-12 17:48:59 +0100
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2019-04-22 11:34:12 +0100
commit4da38f1be6675734f3330578ebd2316848b383f0 (patch)
treea2c763a3cc1ec880c17dba1a4575d9a97b0e907b /drivers/iio
parenta034cbe1c412628383609f1634154348e00e2990 (diff)
downloadlinux-4da38f1be6675734f3330578ebd2316848b383f0.tar.gz
iio: gyro: fxas21002c: add spi driver
Add driver to talk over spi to a fxas21002c gyroscope device and use the core as main controller. Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/gyro/Kconfig7
-rw-r--r--drivers/iio/gyro/Makefile1
-rw-r--r--drivers/iio/gyro/fxas21002c_spi.c70
3 files changed, 77 insertions, 1 deletions
diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig
index 71b6552ee06b..61c00cee037d 100644
--- a/drivers/iio/gyro/Kconfig
+++ b/drivers/iio/gyro/Kconfig
@@ -78,7 +78,8 @@ config FXAS21002C
select IIO_BUFFER
select IIO_TRIGGERED_BUFFER
select FXAS21002C_I2C if (I2C)
- depends on I2C
+ select FXAS21002C_SPI if (SPI)
+ depends on (I2C || SPI_MASTER)
help
Say yes here to build support for NXP FXAS21002C Tri-axis Gyro
Sensor driver connected via I2C or SPI.
@@ -90,6 +91,10 @@ config FXAS21002C_I2C
tristate
select REGMAP_I2C
+config FXAS21002C_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 adc18a5eb283..45cbd5dc644e 100644
--- a/drivers/iio/gyro/Makefile
+++ b/drivers/iio/gyro/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_BMG160_I2C) += bmg160_i2c.o
obj-$(CONFIG_BMG160_SPI) += bmg160_spi.o
obj-$(CONFIG_FXAS21002C) += fxas21002c_core.o
obj-$(CONFIG_FXAS21002C_I2C) += fxas21002c_i2c.o
+obj-$(CONFIG_FXAS21002C_SPI) += fxas21002c_spi.o
obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o
diff --git a/drivers/iio/gyro/fxas21002c_spi.c b/drivers/iio/gyro/fxas21002c_spi.c
new file mode 100644
index 000000000000..77ceebef4e34
--- /dev/null
+++ b/drivers/iio/gyro/fxas21002c_spi.c
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for NXP Fxas21002c Gyroscope - SPI
+ *
+ * Copyright (C) 2019 Linaro Ltd.
+ */
+
+#include <linux/err.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#include "fxas21002c.h"
+
+static const struct regmap_config fxas21002c_regmap_spi_conf = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = FXAS21002C_REG_CTRL3,
+};
+
+static int fxas21002c_spi_probe(struct spi_device *spi)
+{
+ const struct spi_device_id *id = spi_get_device_id(spi);
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_spi(spi, &fxas21002c_regmap_spi_conf);
+ if (IS_ERR(regmap)) {
+ dev_err(&spi->dev, "Failed to register spi regmap: %ld\n",
+ PTR_ERR(regmap));
+ return PTR_ERR(regmap);
+ }
+
+ return fxas21002c_core_probe(&spi->dev, regmap, spi->irq, id->name);
+}
+
+static int fxas21002c_spi_remove(struct spi_device *spi)
+{
+ fxas21002c_core_remove(&spi->dev);
+
+ return 0;
+}
+
+static const struct spi_device_id fxas21002c_spi_id[] = {
+ { "fxas21002c", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, fxas21002c_spi_id);
+
+static const struct of_device_id fxas21002c_spi_of_match[] = {
+ { .compatible = "nxp,fxas21002c", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, fxas21002c_spi_of_match);
+
+static struct spi_driver fxas21002c_spi_driver = {
+ .driver = {
+ .name = "fxas21002c_spi",
+ .pm = &fxas21002c_pm_ops,
+ .of_match_table = fxas21002c_spi_of_match,
+ },
+ .probe = fxas21002c_spi_probe,
+ .remove = fxas21002c_spi_remove,
+ .id_table = fxas21002c_spi_id,
+};
+module_spi_driver(fxas21002c_spi_driver);
+
+MODULE_AUTHOR("Rui Miguel Silva <rui.silva@linaro.org>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("FXAS21002C SPI Gyro driver");