mirror of https://github.com/hak5/openwrt.git
894 lines
25 KiB
Diff
894 lines
25 KiB
Diff
From 84e5ddd5c46ea3bf0cad670da32028994cad5936 Mon Sep 17 00:00:00 2001
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From: Robert Jones <rjones@gateworks.com>
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Date: Mon, 14 Oct 2019 11:49:21 -0700
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Subject: [PATCH] iio: imu: Add support for the FXOS8700 IMU
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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FXOS8700CQ is a small, low-power, 3-axis linear accelerometer and 3-axis
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magnetometer combined into a single package. The device features a
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selectable I2C or point-to-point SPI serial interface with 14-bit
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accelerometer and 16-bit magnetometer ADC resolution along with
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smart-embedded functions.
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FXOS8700CQ has dynamically selectable accelerationfull-scale ranges of
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±2 g/±4 g/±8 g and a fixed magnetic measurement range of ±1200 μT.
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Output data rates (ODR) from 1.563 Hz to 800 Hz are selectable by the user
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for each sensor. Interleaved magnetic and acceleration data is available
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at ODR rates of up to 400 Hz. FXOS8700CQ is available in a plastic QFN
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package and it is guaranteed to operate over the extended temperature
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range of –40 °C to +85 °C.
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TODO: Trigger and IRQ configuration support
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Datasheet:
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http://cache.freescale.com/files/sensors/doc/data_sheet/FXOS8700CQ.pdf
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Signed-off-by: Robert Jones <rjones@gateworks.com>
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Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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---
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drivers/iio/imu/Kconfig | 27 ++
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drivers/iio/imu/Makefile | 5 +
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drivers/iio/imu/fxos8700.h | 10 +
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drivers/iio/imu/fxos8700_core.c | 649 ++++++++++++++++++++++++++++++++++++++++
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drivers/iio/imu/fxos8700_i2c.c | 71 +++++
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drivers/iio/imu/fxos8700_spi.c | 59 ++++
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6 files changed, 821 insertions(+)
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create mode 100644 drivers/iio/imu/fxos8700.h
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create mode 100644 drivers/iio/imu/fxos8700_core.c
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create mode 100644 drivers/iio/imu/fxos8700_i2c.c
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create mode 100644 drivers/iio/imu/fxos8700_spi.c
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--- a/drivers/iio/imu/Kconfig
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+++ b/drivers/iio/imu/Kconfig
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@@ -40,6 +40,33 @@ config ADIS16480
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source "drivers/iio/imu/bmi160/Kconfig"
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+config FXOS8700
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+ tristate
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+
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+config FXOS8700_I2C
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+ tristate "NXP FXOS8700 I2C driver"
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+ depends on I2C
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+ select FXOS8700
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+ select REGMAP_I2C
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+ help
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+ Say yes here to build support for the NXP FXOS8700 m+g combo
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+ sensor on I2C.
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+
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+ This driver can also be built as a module. If so, the module will be
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+ called fxos8700_i2c.
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+
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+config FXOS8700_SPI
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+ tristate "NXP FXOS8700 SPI driver"
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+ depends on SPI
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+ select FXOS8700
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+ select REGMAP_SPI
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+ help
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+ Say yes here to build support for the NXP FXOS8700 m+g combo
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+ sensor on SPI.
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+
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+ This driver can also be built as a module. If so, the module will be
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+ called fxos8700_spi.
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+
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config KMX61
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tristate "Kionix KMX61 6-axis accelerometer and magnetometer"
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depends on I2C
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--- a/drivers/iio/imu/Makefile
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+++ b/drivers/iio/imu/Makefile
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@@ -14,6 +14,11 @@ adis_lib-$(CONFIG_IIO_ADIS_LIB_BUFFER) +
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obj-$(CONFIG_IIO_ADIS_LIB) += adis_lib.o
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obj-y += bmi160/
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+
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+obj-$(CONFIG_FXOS8700) += fxos8700_core.o
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+obj-$(CONFIG_FXOS8700_I2C) += fxos8700_i2c.o
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+obj-$(CONFIG_FXOS8700_SPI) += fxos8700_spi.o
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+
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obj-y += inv_mpu6050/
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obj-$(CONFIG_KMX61) += kmx61.o
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--- /dev/null
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+++ b/drivers/iio/imu/fxos8700.h
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@@ -0,0 +1,10 @@
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+/* SPDX-License-Identifier: GPL-2.0 */
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+#ifndef FXOS8700_H_
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+#define FXOS8700_H_
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+
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+extern const struct regmap_config fxos8700_regmap_config;
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+
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+int fxos8700_core_probe(struct device *dev, struct regmap *regmap,
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+ const char *name, bool use_spi);
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+
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+#endif /* FXOS8700_H_ */
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--- /dev/null
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+++ b/drivers/iio/imu/fxos8700_core.c
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@@ -0,0 +1,649 @@
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+// SPDX-License-Identifier: GPL-2.0
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+/*
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+ * FXOS8700 - NXP IMU (accelerometer plus magnetometer)
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+ *
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+ * IIO core driver for FXOS8700, with support for I2C/SPI busses
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+ *
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+ * TODO: Buffer, trigger, and IRQ support
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+ */
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+#include <linux/module.h>
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+#include <linux/regmap.h>
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+#include <linux/acpi.h>
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+#include <linux/bitops.h>
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+
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+#include <linux/iio/iio.h>
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+#include <linux/iio/sysfs.h>
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+
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+#include "fxos8700.h"
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+
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+/* Register Definitions */
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+#define FXOS8700_STATUS 0x00
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+#define FXOS8700_OUT_X_MSB 0x01
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+#define FXOS8700_OUT_X_LSB 0x02
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+#define FXOS8700_OUT_Y_MSB 0x03
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+#define FXOS8700_OUT_Y_LSB 0x04
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+#define FXOS8700_OUT_Z_MSB 0x05
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+#define FXOS8700_OUT_Z_LSB 0x06
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+#define FXOS8700_F_SETUP 0x09
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+#define FXOS8700_TRIG_CFG 0x0a
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+#define FXOS8700_SYSMOD 0x0b
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+#define FXOS8700_INT_SOURCE 0x0c
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+#define FXOS8700_WHO_AM_I 0x0d
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+#define FXOS8700_XYZ_DATA_CFG 0x0e
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+#define FXOS8700_HP_FILTER_CUTOFF 0x0f
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+#define FXOS8700_PL_STATUS 0x10
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+#define FXOS8700_PL_CFG 0x11
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+#define FXOS8700_PL_COUNT 0x12
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+#define FXOS8700_PL_BF_ZCOMP 0x13
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+#define FXOS8700_PL_THS_REG 0x14
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+#define FXOS8700_A_FFMT_CFG 0x15
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+#define FXOS8700_A_FFMT_SRC 0x16
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+#define FXOS8700_A_FFMT_THS 0x17
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+#define FXOS8700_A_FFMT_COUNT 0x18
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+#define FXOS8700_TRANSIENT_CFG 0x1d
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+#define FXOS8700_TRANSIENT_SRC 0x1e
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+#define FXOS8700_TRANSIENT_THS 0x1f
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+#define FXOS8700_TRANSIENT_COUNT 0x20
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+#define FXOS8700_PULSE_CFG 0x21
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+#define FXOS8700_PULSE_SRC 0x22
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+#define FXOS8700_PULSE_THSX 0x23
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+#define FXOS8700_PULSE_THSY 0x24
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+#define FXOS8700_PULSE_THSZ 0x25
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+#define FXOS8700_PULSE_TMLT 0x26
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+#define FXOS8700_PULSE_LTCY 0x27
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+#define FXOS8700_PULSE_WIND 0x28
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+#define FXOS8700_ASLP_COUNT 0x29
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+#define FXOS8700_CTRL_REG1 0x2a
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+#define FXOS8700_CTRL_REG2 0x2b
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+#define FXOS8700_CTRL_REG3 0x2c
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+#define FXOS8700_CTRL_REG4 0x2d
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+#define FXOS8700_CTRL_REG5 0x2e
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+#define FXOS8700_OFF_X 0x2f
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+#define FXOS8700_OFF_Y 0x30
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+#define FXOS8700_OFF_Z 0x31
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+#define FXOS8700_M_DR_STATUS 0x32
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+#define FXOS8700_M_OUT_X_MSB 0x33
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+#define FXOS8700_M_OUT_X_LSB 0x34
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+#define FXOS8700_M_OUT_Y_MSB 0x35
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+#define FXOS8700_M_OUT_Y_LSB 0x36
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+#define FXOS8700_M_OUT_Z_MSB 0x37
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+#define FXOS8700_M_OUT_Z_LSB 0x38
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+#define FXOS8700_CMP_X_MSB 0x39
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+#define FXOS8700_CMP_X_LSB 0x3a
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+#define FXOS8700_CMP_Y_MSB 0x3b
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+#define FXOS8700_CMP_Y_LSB 0x3c
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+#define FXOS8700_CMP_Z_MSB 0x3d
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+#define FXOS8700_CMP_Z_LSB 0x3e
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+#define FXOS8700_M_OFF_X_MSB 0x3f
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+#define FXOS8700_M_OFF_X_LSB 0x40
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+#define FXOS8700_M_OFF_Y_MSB 0x41
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+#define FXOS8700_M_OFF_Y_LSB 0x42
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+#define FXOS8700_M_OFF_Z_MSB 0x43
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+#define FXOS8700_M_OFF_Z_LSB 0x44
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+#define FXOS8700_MAX_X_MSB 0x45
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+#define FXOS8700_MAX_X_LSB 0x46
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+#define FXOS8700_MAX_Y_MSB 0x47
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+#define FXOS8700_MAX_Y_LSB 0x48
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+#define FXOS8700_MAX_Z_MSB 0x49
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+#define FXOS8700_MAX_Z_LSB 0x4a
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+#define FXOS8700_MIN_X_MSB 0x4b
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+#define FXOS8700_MIN_X_LSB 0x4c
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+#define FXOS8700_MIN_Y_MSB 0x4d
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+#define FXOS8700_MIN_Y_LSB 0x4e
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+#define FXOS8700_MIN_Z_MSB 0x4f
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+#define FXOS8700_MIN_Z_LSB 0x50
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+#define FXOS8700_TEMP 0x51
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+#define FXOS8700_M_THS_CFG 0x52
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+#define FXOS8700_M_THS_SRC 0x53
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+#define FXOS8700_M_THS_X_MSB 0x54
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+#define FXOS8700_M_THS_X_LSB 0x55
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+#define FXOS8700_M_THS_Y_MSB 0x56
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+#define FXOS8700_M_THS_Y_LSB 0x57
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+#define FXOS8700_M_THS_Z_MSB 0x58
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+#define FXOS8700_M_THS_Z_LSB 0x59
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+#define FXOS8700_M_THS_COUNT 0x5a
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+#define FXOS8700_M_CTRL_REG1 0x5b
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+#define FXOS8700_M_CTRL_REG2 0x5c
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+#define FXOS8700_M_CTRL_REG3 0x5d
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+#define FXOS8700_M_INT_SRC 0x5e
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+#define FXOS8700_A_VECM_CFG 0x5f
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+#define FXOS8700_A_VECM_THS_MSB 0x60
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+#define FXOS8700_A_VECM_THS_LSB 0x61
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+#define FXOS8700_A_VECM_CNT 0x62
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+#define FXOS8700_A_VECM_INITX_MSB 0x63
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+#define FXOS8700_A_VECM_INITX_LSB 0x64
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+#define FXOS8700_A_VECM_INITY_MSB 0x65
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+#define FXOS8700_A_VECM_INITY_LSB 0x66
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+#define FXOS8700_A_VECM_INITZ_MSB 0x67
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+#define FXOS8700_A_VECM_INITZ_LSB 0x68
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+#define FXOS8700_M_VECM_CFG 0x69
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+#define FXOS8700_M_VECM_THS_MSB 0x6a
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+#define FXOS8700_M_VECM_THS_LSB 0x6b
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+#define FXOS8700_M_VECM_CNT 0x6c
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+#define FXOS8700_M_VECM_INITX_MSB 0x6d
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+#define FXOS8700_M_VECM_INITX_LSB 0x6e
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+#define FXOS8700_M_VECM_INITY_MSB 0x6f
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+#define FXOS8700_M_VECM_INITY_LSB 0x70
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+#define FXOS8700_M_VECM_INITZ_MSB 0x71
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+#define FXOS8700_M_VECM_INITZ_LSB 0x72
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+#define FXOS8700_A_FFMT_THS_X_MSB 0x73
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+#define FXOS8700_A_FFMT_THS_X_LSB 0x74
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+#define FXOS8700_A_FFMT_THS_Y_MSB 0x75
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+#define FXOS8700_A_FFMT_THS_Y_LSB 0x76
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+#define FXOS8700_A_FFMT_THS_Z_MSB 0x77
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+#define FXOS8700_A_FFMT_THS_Z_LSB 0x78
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+#define FXOS8700_A_TRAN_INIT_MSB 0x79
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+#define FXOS8700_A_TRAN_INIT_LSB_X 0x7a
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+#define FXOS8700_A_TRAN_INIT_LSB_Y 0x7b
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+#define FXOS8700_A_TRAN_INIT_LSB_Z 0x7d
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+#define FXOS8700_TM_NVM_LOCK 0x7e
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+#define FXOS8700_NVM_DATA0_35 0x80
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+#define FXOS8700_NVM_DATA_BNK3 0xa4
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+#define FXOS8700_NVM_DATA_BNK2 0xa5
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+#define FXOS8700_NVM_DATA_BNK1 0xa6
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+#define FXOS8700_NVM_DATA_BNK0 0xa7
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+
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+/* Bit definitions for FXOS8700_CTRL_REG1 */
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+#define FXOS8700_CTRL_ODR_MSK 0x38
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+#define FXOS8700_CTRL_ODR_MAX 0x00
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+#define FXOS8700_CTRL_ODR_MIN GENMASK(4, 3)
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+
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+/* Bit definitions for FXOS8700_M_CTRL_REG1 */
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+#define FXOS8700_HMS_MASK GENMASK(1, 0)
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+#define FXOS8700_OS_MASK GENMASK(4, 2)
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+
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+/* Bit definitions for FXOS8700_M_CTRL_REG2 */
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+#define FXOS8700_MAXMIN_RST BIT(2)
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+#define FXOS8700_MAXMIN_DIS_THS BIT(3)
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+#define FXOS8700_MAXMIN_DIS BIT(4)
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+
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+#define FXOS8700_ACTIVE 0x01
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+#define FXOS8700_ACTIVE_MIN_USLEEP 4000 /* from table 6 in datasheet */
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+
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+#define FXOS8700_DEVICE_ID 0xC7
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+#define FXOS8700_PRE_DEVICE_ID 0xC4
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+#define FXOS8700_DATA_BUF_SIZE 3
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+
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+struct fxos8700_data {
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+ struct regmap *regmap;
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+ struct iio_trigger *trig;
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+ __be16 buf[FXOS8700_DATA_BUF_SIZE] ____cacheline_aligned;
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+};
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+
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+/* Regmap info */
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+static const struct regmap_range read_range[] = {
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+ {
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+ .range_min = FXOS8700_STATUS,
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+ .range_max = FXOS8700_A_FFMT_COUNT,
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+ }, {
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+ .range_min = FXOS8700_TRANSIENT_CFG,
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+ .range_max = FXOS8700_A_FFMT_THS_Z_LSB,
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+ },
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+};
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+
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+static const struct regmap_range write_range[] = {
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+ {
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+ .range_min = FXOS8700_F_SETUP,
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+ .range_max = FXOS8700_TRIG_CFG,
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+ }, {
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+ .range_min = FXOS8700_XYZ_DATA_CFG,
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+ .range_max = FXOS8700_HP_FILTER_CUTOFF,
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+ }, {
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+ .range_min = FXOS8700_PL_CFG,
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+ .range_max = FXOS8700_A_FFMT_CFG,
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+ }, {
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+ .range_min = FXOS8700_A_FFMT_THS,
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+ .range_max = FXOS8700_TRANSIENT_CFG,
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+ }, {
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+ .range_min = FXOS8700_TRANSIENT_THS,
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+ .range_max = FXOS8700_PULSE_CFG,
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+ }, {
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+ .range_min = FXOS8700_PULSE_THSX,
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+ .range_max = FXOS8700_OFF_Z,
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+ }, {
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+ .range_min = FXOS8700_M_OFF_X_MSB,
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+ .range_max = FXOS8700_M_OFF_Z_LSB,
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+ }, {
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+ .range_min = FXOS8700_M_THS_CFG,
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+ .range_max = FXOS8700_M_THS_CFG,
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+ }, {
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+ .range_min = FXOS8700_M_THS_X_MSB,
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+ .range_max = FXOS8700_M_CTRL_REG3,
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+ }, {
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+ .range_min = FXOS8700_A_VECM_CFG,
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+ .range_max = FXOS8700_A_FFMT_THS_Z_LSB,
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+ },
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+};
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+
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+static const struct regmap_access_table driver_read_table = {
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+ .yes_ranges = read_range,
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+ .n_yes_ranges = ARRAY_SIZE(read_range),
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+};
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+
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+static const struct regmap_access_table driver_write_table = {
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+ .yes_ranges = write_range,
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+ .n_yes_ranges = ARRAY_SIZE(write_range),
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+};
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+
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+const struct regmap_config fxos8700_regmap_config = {
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+ .reg_bits = 8,
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+ .val_bits = 8,
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+ .max_register = FXOS8700_NVM_DATA_BNK0,
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+ .rd_table = &driver_read_table,
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+ .wr_table = &driver_write_table,
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+};
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+EXPORT_SYMBOL(fxos8700_regmap_config);
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+
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+#define FXOS8700_CHANNEL(_type, _axis) { \
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+ .type = _type, \
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+ .modified = 1, \
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+ .channel2 = IIO_MOD_##_axis, \
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+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
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+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
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+ BIT(IIO_CHAN_INFO_SAMP_FREQ), \
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+}
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+
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+enum fxos8700_accel_scale_bits {
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+ MODE_2G = 0,
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+ MODE_4G,
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+ MODE_8G,
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+};
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+
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+/* scan indexes follow DATA register order */
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+enum fxos8700_scan_axis {
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+ FXOS8700_SCAN_ACCEL_X = 0,
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+ FXOS8700_SCAN_ACCEL_Y,
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+ FXOS8700_SCAN_ACCEL_Z,
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+ FXOS8700_SCAN_MAGN_X,
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+ FXOS8700_SCAN_MAGN_Y,
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+ FXOS8700_SCAN_MAGN_Z,
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+ FXOS8700_SCAN_RHALL,
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+ FXOS8700_SCAN_TIMESTAMP,
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+};
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+
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+enum fxos8700_sensor {
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+ FXOS8700_ACCEL = 0,
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+ FXOS8700_MAGN,
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+ FXOS8700_NUM_SENSORS /* must be last */
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+};
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+
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+enum fxos8700_int_pin {
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||
+ FXOS8700_PIN_INT1,
|
||
+ FXOS8700_PIN_INT2
|
||
+};
|
||
+
|
||
+struct fxos8700_scale {
|
||
+ u8 bits;
|
||
+ int uscale;
|
||
+};
|
||
+
|
||
+struct fxos8700_odr {
|
||
+ u8 bits;
|
||
+ int odr;
|
||
+ int uodr;
|
||
+};
|
||
+
|
||
+static const struct fxos8700_scale fxos8700_accel_scale[] = {
|
||
+ { MODE_2G, 244},
|
||
+ { MODE_4G, 488},
|
||
+ { MODE_8G, 976},
|
||
+};
|
||
+
|
||
+/*
|
||
+ * Accellerometer and magnetometer have the same ODR options, set in the
|
||
+ * CTRL_REG1 register. ODR is halved when using both sensors at once in
|
||
+ * hybrid mode.
|
||
+ */
|
||
+static const struct fxos8700_odr fxos8700_odr[] = {
|
||
+ {0x00, 800, 0},
|
||
+ {0x01, 400, 0},
|
||
+ {0x02, 200, 0},
|
||
+ {0x03, 100, 0},
|
||
+ {0x04, 50, 0},
|
||
+ {0x05, 12, 500000},
|
||
+ {0x06, 6, 250000},
|
||
+ {0x07, 1, 562500},
|
||
+};
|
||
+
|
||
+static const struct iio_chan_spec fxos8700_channels[] = {
|
||
+ FXOS8700_CHANNEL(IIO_ACCEL, X),
|
||
+ FXOS8700_CHANNEL(IIO_ACCEL, Y),
|
||
+ FXOS8700_CHANNEL(IIO_ACCEL, Z),
|
||
+ FXOS8700_CHANNEL(IIO_MAGN, X),
|
||
+ FXOS8700_CHANNEL(IIO_MAGN, Y),
|
||
+ FXOS8700_CHANNEL(IIO_MAGN, Z),
|
||
+ IIO_CHAN_SOFT_TIMESTAMP(FXOS8700_SCAN_TIMESTAMP),
|
||
+};
|
||
+
|
||
+static enum fxos8700_sensor fxos8700_to_sensor(enum iio_chan_type iio_type)
|
||
+{
|
||
+ switch (iio_type) {
|
||
+ case IIO_ACCEL:
|
||
+ return FXOS8700_ACCEL;
|
||
+ case IIO_ANGL_VEL:
|
||
+ return FXOS8700_MAGN;
|
||
+ default:
|
||
+ return -EINVAL;
|
||
+ }
|
||
+}
|
||
+
|
||
+static int fxos8700_set_active_mode(struct fxos8700_data *data,
|
||
+ enum fxos8700_sensor t, bool mode)
|
||
+{
|
||
+ int ret;
|
||
+
|
||
+ ret = regmap_write(data->regmap, FXOS8700_CTRL_REG1, mode);
|
||
+ if (ret)
|
||
+ return ret;
|
||
+
|
||
+ usleep_range(FXOS8700_ACTIVE_MIN_USLEEP,
|
||
+ FXOS8700_ACTIVE_MIN_USLEEP + 1000);
|
||
+
|
||
+ return 0;
|
||
+}
|
||
+
|
||
+static int fxos8700_set_scale(struct fxos8700_data *data,
|
||
+ enum fxos8700_sensor t, int uscale)
|
||
+{
|
||
+ int i;
|
||
+ static const int scale_num = ARRAY_SIZE(fxos8700_accel_scale);
|
||
+ struct device *dev = regmap_get_device(data->regmap);
|
||
+
|
||
+ if (t == FXOS8700_MAGN) {
|
||
+ dev_err(dev, "Magnetometer scale is locked at 1200uT\n");
|
||
+ return -EINVAL;
|
||
+ }
|
||
+
|
||
+ for (i = 0; i < scale_num; i++)
|
||
+ if (fxos8700_accel_scale[i].uscale == uscale)
|
||
+ break;
|
||
+
|
||
+ if (i == scale_num)
|
||
+ return -EINVAL;
|
||
+
|
||
+ return regmap_write(data->regmap, FXOS8700_XYZ_DATA_CFG,
|
||
+ fxos8700_accel_scale[i].bits);
|
||
+}
|
||
+
|
||
+static int fxos8700_get_scale(struct fxos8700_data *data,
|
||
+ enum fxos8700_sensor t, int *uscale)
|
||
+{
|
||
+ int i, ret, val;
|
||
+ static const int scale_num = ARRAY_SIZE(fxos8700_accel_scale);
|
||
+
|
||
+ if (t == FXOS8700_MAGN) {
|
||
+ *uscale = 1200; /* Magnetometer is locked at 1200uT */
|
||
+ return 0;
|
||
+ }
|
||
+
|
||
+ ret = regmap_read(data->regmap, FXOS8700_XYZ_DATA_CFG, &val);
|
||
+ if (ret)
|
||
+ return ret;
|
||
+
|
||
+ for (i = 0; i < scale_num; i++) {
|
||
+ if (fxos8700_accel_scale[i].bits == (val & 0x3)) {
|
||
+ *uscale = fxos8700_accel_scale[i].uscale;
|
||
+ return 0;
|
||
+ }
|
||
+ }
|
||
+
|
||
+ return -EINVAL;
|
||
+}
|
||
+
|
||
+static int fxos8700_get_data(struct fxos8700_data *data, int chan_type,
|
||
+ int axis, int *val)
|
||
+{
|
||
+ u8 base, reg;
|
||
+ int ret;
|
||
+ enum fxos8700_sensor type = fxos8700_to_sensor(chan_type);
|
||
+
|
||
+ base = type ? FXOS8700_OUT_X_MSB : FXOS8700_M_OUT_X_MSB;
|
||
+
|
||
+ /* Block read 6 bytes of device output registers to avoid data loss */
|
||
+ ret = regmap_bulk_read(data->regmap, base, data->buf,
|
||
+ FXOS8700_DATA_BUF_SIZE);
|
||
+ if (ret)
|
||
+ return ret;
|
||
+
|
||
+ /* Convert axis to buffer index */
|
||
+ reg = axis - IIO_MOD_X;
|
||
+
|
||
+ /* Convert to native endianness */
|
||
+ *val = sign_extend32(be16_to_cpu(data->buf[reg]), 15);
|
||
+
|
||
+ return 0;
|
||
+}
|
||
+
|
||
+static int fxos8700_set_odr(struct fxos8700_data *data, enum fxos8700_sensor t,
|
||
+ int odr, int uodr)
|
||
+{
|
||
+ int i, ret, val;
|
||
+ bool active_mode;
|
||
+ static const int odr_num = ARRAY_SIZE(fxos8700_odr);
|
||
+
|
||
+ ret = regmap_read(data->regmap, FXOS8700_CTRL_REG1, &val);
|
||
+ if (ret)
|
||
+ return ret;
|
||
+
|
||
+ active_mode = val & FXOS8700_ACTIVE;
|
||
+
|
||
+ if (active_mode) {
|
||
+ /*
|
||
+ * The device must be in standby mode to change any of the
|
||
+ * other fields within CTRL_REG1
|
||
+ */
|
||
+ ret = regmap_write(data->regmap, FXOS8700_CTRL_REG1,
|
||
+ val & ~FXOS8700_ACTIVE);
|
||
+ if (ret)
|
||
+ return ret;
|
||
+ }
|
||
+
|
||
+ for (i = 0; i < odr_num; i++)
|
||
+ if (fxos8700_odr[i].odr == odr && fxos8700_odr[i].uodr == uodr)
|
||
+ break;
|
||
+
|
||
+ if (i >= odr_num)
|
||
+ return -EINVAL;
|
||
+
|
||
+ return regmap_update_bits(data->regmap,
|
||
+ FXOS8700_CTRL_REG1,
|
||
+ FXOS8700_CTRL_ODR_MSK + FXOS8700_ACTIVE,
|
||
+ fxos8700_odr[i].bits << 3 | active_mode);
|
||
+}
|
||
+
|
||
+static int fxos8700_get_odr(struct fxos8700_data *data, enum fxos8700_sensor t,
|
||
+ int *odr, int *uodr)
|
||
+{
|
||
+ int i, val, ret;
|
||
+ static const int odr_num = ARRAY_SIZE(fxos8700_odr);
|
||
+
|
||
+ ret = regmap_read(data->regmap, FXOS8700_CTRL_REG1, &val);
|
||
+ if (ret)
|
||
+ return ret;
|
||
+
|
||
+ val &= FXOS8700_CTRL_ODR_MSK;
|
||
+
|
||
+ for (i = 0; i < odr_num; i++)
|
||
+ if (val == fxos8700_odr[i].bits)
|
||
+ break;
|
||
+
|
||
+ if (i >= odr_num)
|
||
+ return -EINVAL;
|
||
+
|
||
+ *odr = fxos8700_odr[i].odr;
|
||
+ *uodr = fxos8700_odr[i].uodr;
|
||
+
|
||
+ return 0;
|
||
+}
|
||
+
|
||
+static int fxos8700_read_raw(struct iio_dev *indio_dev,
|
||
+ struct iio_chan_spec const *chan,
|
||
+ int *val, int *val2, long mask)
|
||
+{
|
||
+ int ret;
|
||
+ struct fxos8700_data *data = iio_priv(indio_dev);
|
||
+
|
||
+ switch (mask) {
|
||
+ case IIO_CHAN_INFO_RAW:
|
||
+ ret = fxos8700_get_data(data, chan->type, chan->channel2, val);
|
||
+ if (ret)
|
||
+ return ret;
|
||
+ return IIO_VAL_INT;
|
||
+ case IIO_CHAN_INFO_SCALE:
|
||
+ *val = 0;
|
||
+ ret = fxos8700_get_scale(data, fxos8700_to_sensor(chan->type),
|
||
+ val2);
|
||
+ return ret ? ret : IIO_VAL_INT_PLUS_MICRO;
|
||
+ case IIO_CHAN_INFO_SAMP_FREQ:
|
||
+ ret = fxos8700_get_odr(data, fxos8700_to_sensor(chan->type),
|
||
+ val, val2);
|
||
+ return ret ? ret : IIO_VAL_INT_PLUS_MICRO;
|
||
+ default:
|
||
+ return -EINVAL;
|
||
+ }
|
||
+}
|
||
+
|
||
+static int fxos8700_write_raw(struct iio_dev *indio_dev,
|
||
+ struct iio_chan_spec const *chan,
|
||
+ int val, int val2, long mask)
|
||
+{
|
||
+ struct fxos8700_data *data = iio_priv(indio_dev);
|
||
+
|
||
+ switch (mask) {
|
||
+ case IIO_CHAN_INFO_SCALE:
|
||
+ return fxos8700_set_scale(data, fxos8700_to_sensor(chan->type),
|
||
+ val2);
|
||
+ case IIO_CHAN_INFO_SAMP_FREQ:
|
||
+ return fxos8700_set_odr(data, fxos8700_to_sensor(chan->type),
|
||
+ val, val2);
|
||
+ default:
|
||
+ return -EINVAL;
|
||
+ }
|
||
+}
|
||
+
|
||
+static IIO_CONST_ATTR(in_accel_sampling_frequency_available,
|
||
+ "1.5625 6.25 12.5 50 100 200 400 800");
|
||
+static IIO_CONST_ATTR(in_magn_sampling_frequency_available,
|
||
+ "1.5625 6.25 12.5 50 100 200 400 800");
|
||
+static IIO_CONST_ATTR(in_accel_scale_available, "0.000244 0.000488 0.000976");
|
||
+static IIO_CONST_ATTR(in_magn_scale_available, "0.000001200");
|
||
+
|
||
+static struct attribute *fxos8700_attrs[] = {
|
||
+ &iio_const_attr_in_accel_sampling_frequency_available.dev_attr.attr,
|
||
+ &iio_const_attr_in_magn_sampling_frequency_available.dev_attr.attr,
|
||
+ &iio_const_attr_in_accel_scale_available.dev_attr.attr,
|
||
+ &iio_const_attr_in_magn_scale_available.dev_attr.attr,
|
||
+ NULL,
|
||
+};
|
||
+
|
||
+static const struct attribute_group fxos8700_attrs_group = {
|
||
+ .attrs = fxos8700_attrs,
|
||
+};
|
||
+
|
||
+static const struct iio_info fxos8700_info = {
|
||
+ .read_raw = fxos8700_read_raw,
|
||
+ .write_raw = fxos8700_write_raw,
|
||
+ .attrs = &fxos8700_attrs_group,
|
||
+};
|
||
+
|
||
+static int fxos8700_chip_init(struct fxos8700_data *data, bool use_spi)
|
||
+{
|
||
+ int ret;
|
||
+ unsigned int val;
|
||
+ struct device *dev = regmap_get_device(data->regmap);
|
||
+
|
||
+ ret = regmap_read(data->regmap, FXOS8700_WHO_AM_I, &val);
|
||
+ if (ret) {
|
||
+ dev_err(dev, "Error reading chip id\n");
|
||
+ return ret;
|
||
+ }
|
||
+ if (val != FXOS8700_DEVICE_ID && val != FXOS8700_PRE_DEVICE_ID) {
|
||
+ dev_err(dev, "Wrong chip id, got %x expected %x or %x\n",
|
||
+ val, FXOS8700_DEVICE_ID, FXOS8700_PRE_DEVICE_ID);
|
||
+ return -ENODEV;
|
||
+ }
|
||
+
|
||
+ ret = fxos8700_set_active_mode(data, FXOS8700_ACCEL, true);
|
||
+ if (ret)
|
||
+ return ret;
|
||
+
|
||
+ ret = fxos8700_set_active_mode(data, FXOS8700_MAGN, true);
|
||
+ if (ret)
|
||
+ return ret;
|
||
+
|
||
+ /*
|
||
+ * The device must be in standby mode to change any of the other fields
|
||
+ * within CTRL_REG1
|
||
+ */
|
||
+ ret = regmap_write(data->regmap, FXOS8700_CTRL_REG1, 0x00);
|
||
+ if (ret)
|
||
+ return ret;
|
||
+
|
||
+ /* Set max oversample ratio (OSR) and both devices active */
|
||
+ ret = regmap_write(data->regmap, FXOS8700_M_CTRL_REG1,
|
||
+ FXOS8700_HMS_MASK | FXOS8700_OS_MASK);
|
||
+ if (ret)
|
||
+ return ret;
|
||
+
|
||
+ /* Disable and rst min/max measurements & threshold */
|
||
+ ret = regmap_write(data->regmap, FXOS8700_M_CTRL_REG2,
|
||
+ FXOS8700_MAXMIN_RST | FXOS8700_MAXMIN_DIS_THS |
|
||
+ FXOS8700_MAXMIN_DIS);
|
||
+ if (ret)
|
||
+ return ret;
|
||
+
|
||
+ /* Max ODR (800Hz individual or 400Hz hybrid), active mode */
|
||
+ ret = regmap_write(data->regmap, FXOS8700_CTRL_REG1,
|
||
+ FXOS8700_CTRL_ODR_MAX | FXOS8700_ACTIVE);
|
||
+ if (ret)
|
||
+ return ret;
|
||
+
|
||
+ /* Set for max full-scale range (+/-8G) */
|
||
+ return regmap_write(data->regmap, FXOS8700_XYZ_DATA_CFG, MODE_8G);
|
||
+}
|
||
+
|
||
+static void fxos8700_chip_uninit(void *data)
|
||
+{
|
||
+ struct fxos8700_data *fxos8700_data = data;
|
||
+
|
||
+ fxos8700_set_active_mode(fxos8700_data, FXOS8700_ACCEL, false);
|
||
+ fxos8700_set_active_mode(fxos8700_data, FXOS8700_MAGN, false);
|
||
+}
|
||
+
|
||
+int fxos8700_core_probe(struct device *dev, struct regmap *regmap,
|
||
+ const char *name, bool use_spi)
|
||
+{
|
||
+ struct iio_dev *indio_dev;
|
||
+ struct fxos8700_data *data;
|
||
+ int ret;
|
||
+
|
||
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
|
||
+ if (!indio_dev)
|
||
+ return -ENOMEM;
|
||
+
|
||
+ data = iio_priv(indio_dev);
|
||
+ dev_set_drvdata(dev, indio_dev);
|
||
+ data->regmap = regmap;
|
||
+
|
||
+ ret = fxos8700_chip_init(data, use_spi);
|
||
+ if (ret)
|
||
+ return ret;
|
||
+
|
||
+ ret = devm_add_action_or_reset(dev, fxos8700_chip_uninit, data);
|
||
+ if (ret)
|
||
+ return ret;
|
||
+
|
||
+ indio_dev->dev.parent = dev;
|
||
+ indio_dev->channels = fxos8700_channels;
|
||
+ indio_dev->num_channels = ARRAY_SIZE(fxos8700_channels);
|
||
+ indio_dev->name = name ? name : "fxos8700";
|
||
+ indio_dev->modes = INDIO_DIRECT_MODE;
|
||
+ indio_dev->info = &fxos8700_info;
|
||
+
|
||
+ return devm_iio_device_register(dev, indio_dev);
|
||
+}
|
||
+EXPORT_SYMBOL_GPL(fxos8700_core_probe);
|
||
+
|
||
+MODULE_AUTHOR("Robert Jones <rjones@gateworks.com>");
|
||
+MODULE_DESCRIPTION("FXOS8700 6-Axis Acc and Mag Combo Sensor driver");
|
||
+MODULE_LICENSE("GPL v2");
|
||
--- /dev/null
|
||
+++ b/drivers/iio/imu/fxos8700_i2c.c
|
||
@@ -0,0 +1,71 @@
|
||
+// SPDX-License-Identifier: GPL-2.0
|
||
+/*
|
||
+ * FXOS8700 - NXP IMU, I2C bits
|
||
+ *
|
||
+ * 7-bit I2C slave address determined by SA1 and SA0 logic level
|
||
+ * inputs represented in the following table:
|
||
+ * SA1 | SA0 | Slave Address
|
||
+ * 0 | 0 | 0x1E
|
||
+ * 0 | 1 | 0x1D
|
||
+ * 1 | 0 | 0x1C
|
||
+ * 1 | 1 | 0x1F
|
||
+ */
|
||
+#include <linux/acpi.h>
|
||
+#include <linux/i2c.h>
|
||
+#include <linux/module.h>
|
||
+#include <linux/mod_devicetable.h>
|
||
+#include <linux/regmap.h>
|
||
+
|
||
+#include "fxos8700.h"
|
||
+
|
||
+static int fxos8700_i2c_probe(struct i2c_client *client,
|
||
+ const struct i2c_device_id *id)
|
||
+{
|
||
+ struct regmap *regmap;
|
||
+ const char *name = NULL;
|
||
+
|
||
+ regmap = devm_regmap_init_i2c(client, &fxos8700_regmap_config);
|
||
+ if (IS_ERR(regmap)) {
|
||
+ dev_err(&client->dev, "Failed to register i2c regmap %d\n",
|
||
+ (int)PTR_ERR(regmap));
|
||
+ return PTR_ERR(regmap);
|
||
+ }
|
||
+
|
||
+ if (id)
|
||
+ name = id->name;
|
||
+
|
||
+ return fxos8700_core_probe(&client->dev, regmap, name, false);
|
||
+}
|
||
+
|
||
+static const struct i2c_device_id fxos8700_i2c_id[] = {
|
||
+ {"fxos8700", 0},
|
||
+ { }
|
||
+};
|
||
+MODULE_DEVICE_TABLE(i2c, fxos8700_i2c_id);
|
||
+
|
||
+static const struct acpi_device_id fxos8700_acpi_match[] = {
|
||
+ {"FXOS8700", 0},
|
||
+ { }
|
||
+};
|
||
+MODULE_DEVICE_TABLE(acpi, fxos8700_acpi_match);
|
||
+
|
||
+static const struct of_device_id fxos8700_of_match[] = {
|
||
+ { .compatible = "nxp,fxos8700" },
|
||
+ { }
|
||
+};
|
||
+MODULE_DEVICE_TABLE(of, fxos8700_of_match);
|
||
+
|
||
+static struct i2c_driver fxos8700_i2c_driver = {
|
||
+ .driver = {
|
||
+ .name = "fxos8700_i2c",
|
||
+ .acpi_match_table = ACPI_PTR(fxos8700_acpi_match),
|
||
+ .of_match_table = fxos8700_of_match,
|
||
+ },
|
||
+ .probe = fxos8700_i2c_probe,
|
||
+ .id_table = fxos8700_i2c_id,
|
||
+};
|
||
+module_i2c_driver(fxos8700_i2c_driver);
|
||
+
|
||
+MODULE_AUTHOR("Robert Jones <rjones@gateworks.com>");
|
||
+MODULE_DESCRIPTION("FXOS8700 I2C driver");
|
||
+MODULE_LICENSE("GPL v2");
|
||
--- /dev/null
|
||
+++ b/drivers/iio/imu/fxos8700_spi.c
|
||
@@ -0,0 +1,59 @@
|
||
+// SPDX-License-Identifier: GPL-2.0
|
||
+/*
|
||
+ * FXOS8700 - NXP IMU, SPI bits
|
||
+ */
|
||
+#include <linux/acpi.h>
|
||
+#include <linux/module.h>
|
||
+#include <linux/mod_devicetable.h>
|
||
+#include <linux/regmap.h>
|
||
+#include <linux/spi/spi.h>
|
||
+
|
||
+#include "fxos8700.h"
|
||
+
|
||
+static int fxos8700_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, &fxos8700_regmap_config);
|
||
+ if (IS_ERR(regmap)) {
|
||
+ dev_err(&spi->dev, "Failed to register spi regmap %d\n",
|
||
+ (int)PTR_ERR(regmap));
|
||
+ return PTR_ERR(regmap);
|
||
+ }
|
||
+
|
||
+ return fxos8700_core_probe(&spi->dev, regmap, id->name, true);
|
||
+}
|
||
+
|
||
+static const struct spi_device_id fxos8700_spi_id[] = {
|
||
+ {"fxos8700", 0},
|
||
+ { }
|
||
+};
|
||
+MODULE_DEVICE_TABLE(spi, fxos8700_spi_id);
|
||
+
|
||
+static const struct acpi_device_id fxos8700_acpi_match[] = {
|
||
+ {"FXOS8700", 0},
|
||
+ { }
|
||
+};
|
||
+MODULE_DEVICE_TABLE(acpi, fxos8700_acpi_match);
|
||
+
|
||
+static const struct of_device_id fxos8700_of_match[] = {
|
||
+ { .compatible = "nxp,fxos8700" },
|
||
+ { }
|
||
+};
|
||
+MODULE_DEVICE_TABLE(of, fxos8700_of_match);
|
||
+
|
||
+static struct spi_driver fxos8700_spi_driver = {
|
||
+ .probe = fxos8700_spi_probe,
|
||
+ .id_table = fxos8700_spi_id,
|
||
+ .driver = {
|
||
+ .acpi_match_table = ACPI_PTR(fxos8700_acpi_match),
|
||
+ .of_match_table = fxos8700_of_match,
|
||
+ .name = "fxos8700_spi",
|
||
+ },
|
||
+};
|
||
+module_spi_driver(fxos8700_spi_driver);
|
||
+
|
||
+MODULE_AUTHOR("Robert Jones <rjones@gateworks.com>");
|
||
+MODULE_DESCRIPTION("FXOS8700 SPI driver");
|
||
+MODULE_LICENSE("GPL v2");
|