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Date: Sun, 6 Feb 2022 23:13:07 +0200
From: Cosmin Tanislav <demonsingur@...il.com>
To: unlisted-recipients:; (no To-header on input)
Cc: cosmin.tanislav@...log.com, demonsingur@...il.com,
Lars-Peter Clausen <lars@...afoo.de>,
Michael Hennerich <Michael.Hennerich@...log.com>,
Rob Herring <robh+dt@...nel.org>, linux-iio@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 5/5] iio: accel: add ADXL367 driver
The ADXL367 is an ultralow power, 3-axis MEMS accelerometer.
The ADXL367 does not alias input signals to achieve ultralow power
consumption, it samples the full bandwidth of the sensor at all
data rates. Measurement ranges of +-2g, +-4g, and +-8g are available,
with a resolution of 0.25mg/LSB on the +-2 g range.
In addition to its ultralow power consumption, the ADXL367
has many features to enable true system level power reduction.
It includes a deep multimode output FIFO, a built-in micropower
temperature sensor, and an internal ADC for synchronous conversion
of an additional analog input.
Signed-off-by: Cosmin Tanislav <cosmin.tanislav@...log.com>
---
MAINTAINERS | 8 +
drivers/iio/accel/Kconfig | 27 +
drivers/iio/accel/Makefile | 3 +
drivers/iio/accel/adxl367.c | 1585 +++++++++++++++++++++++++++++++
drivers/iio/accel/adxl367.h | 23 +
drivers/iio/accel/adxl367_i2c.c | 90 ++
drivers/iio/accel/adxl367_spi.c | 164 ++++
7 files changed, 1900 insertions(+)
create mode 100644 drivers/iio/accel/adxl367.c
create mode 100644 drivers/iio/accel/adxl367.h
create mode 100644 drivers/iio/accel/adxl367_i2c.c
create mode 100644 drivers/iio/accel/adxl367_spi.c
diff --git a/MAINTAINERS b/MAINTAINERS
index a2c8699e9e41..3b5393bb6fee 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -606,6 +606,14 @@ F: drivers/iio/accel/adxl355_core.c
F: drivers/iio/accel/adxl355_i2c.c
F: drivers/iio/accel/adxl355_spi.c
+ADXL367 THREE-AXIS DIGITAL ACCELEROMETER DRIVER
+M: Cosmin Tanislav <cosmin.tanislav@...log.com>
+L: linux-iio@...r.kernel.org
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/devicetree/bindings/iio/accel/adi,adxl367.yaml
+F: drivers/iio/accel/adxl367*
+
ADXL372 THREE-AXIS DIGITAL ACCELEROMETER DRIVER
M: Michael Hennerich <michael.hennerich@...log.com>
S: Supported
diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
index eb17ca40e08a..eac3f02662ae 100644
--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -123,6 +123,33 @@ config ADXL355_SPI
will be called adxl355_spi and you will also get adxl355_core
for the core module.
+config ADXL367
+ tristate
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+
+config ADXL367_SPI
+ tristate "Analog Devices ADXL367 3-Axis Accelerometer SPI Driver"
+ depends on SPI
+ select ADXL367
+ select REGMAP_SPI
+ help
+ Say yes here to add support for the Analog Devices ADXL367 triaxial
+ acceleration sensor.
+ To compile this driver as a module, choose M here: the
+ module will be called adxl367_spi.
+
+config ADXL367_I2C
+ tristate "Analog Devices ADXL367 3-Axis Accelerometer I2C Driver"
+ depends on I2C
+ select ADXL367
+ select REGMAP_I2C
+ help
+ Say yes here to add support for the Analog Devices ADXL367 triaxial
+ acceleration sensor.
+ To compile this driver as a module, choose M here: the
+ module will be called adxl367_i2c.
+
config ADXL372
tristate
select IIO_BUFFER
diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile
index d03e2f6bba08..4d8792668838 100644
--- a/drivers/iio/accel/Makefile
+++ b/drivers/iio/accel/Makefile
@@ -15,6 +15,9 @@ obj-$(CONFIG_ADXL345_SPI) += adxl345_spi.o
obj-$(CONFIG_ADXL355) += adxl355_core.o
obj-$(CONFIG_ADXL355_I2C) += adxl355_i2c.o
obj-$(CONFIG_ADXL355_SPI) += adxl355_spi.o
+obj-$(CONFIG_ADXL367) += adxl367.o
+obj-$(CONFIG_ADXL367_I2C) += adxl367_i2c.o
+obj-$(CONFIG_ADXL367_SPI) += adxl367_spi.o
obj-$(CONFIG_ADXL372) += adxl372.o
obj-$(CONFIG_ADXL372_I2C) += adxl372_i2c.o
obj-$(CONFIG_ADXL372_SPI) += adxl372_spi.o
diff --git a/drivers/iio/accel/adxl367.c b/drivers/iio/accel/adxl367.c
new file mode 100644
index 000000000000..cac47db7d89c
--- /dev/null
+++ b/drivers/iio/accel/adxl367.c
@@ -0,0 +1,1585 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2021 Analog Devices, Inc.
+ * Author: Cosmin Tanislav <cosmin.tanislav@...log.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/kfifo_buf.h>
+#include <linux/iio/sysfs.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <asm/unaligned.h>
+
+#include "adxl367.h"
+
+#define ADXL367_REG_DEVID 0x00
+#define ADXL367_DEVID_AD 0xAD
+
+#define ADXL367_REG_STATUS 0x0B
+#define ADXL367_STATUS_INACT_MASK BIT(5)
+#define ADXL367_STATUS_ACT_MASK BIT(4)
+#define ADXL367_STATUS_FIFO_FULL_MASK BIT(2)
+
+#define ADXL367_FIFO_ENT_H_MASK GENMASK(1, 0)
+
+#define ADXL367_REG_X_DATA_H 0x0E
+#define ADXL367_REG_Y_DATA_H 0x10
+#define ADXL367_REG_Z_DATA_H 0x12
+#define ADXL367_REG_TEMP_DATA_H 0x14
+#define ADXL367_REG_EX_ADC_DATA_H 0x16
+#define ADXL367_DATA_MASK GENMASK(15, 2)
+
+#define ADXL367_TEMP_25C 165
+#define ADXL367_TEMP_PER_C 54
+
+#define ADXL367_VOLTAGE_OFFSET 8192
+#define ADXL367_VOLTAGE_MAX_MV 1000
+#define ADXL367_VOLTAGE_MAX_RAW GENMASK(13, 0)
+
+#define ADXL367_REG_RESET 0x1F
+#define ADXL367_RESET_CODE 0x52
+
+#define ADXL367_REG_THRESH_ACT_H 0x20
+#define ADXL367_REG_THRESH_INACT_H 0x23
+#define ADXL367_THRESH_MAX GENMASK(12, 0)
+#define ADXL367_THRESH_VAL_H_MASK GENMASK(12, 6)
+#define ADXL367_THRESH_H_MASK GENMASK(6, 0)
+#define ADXL367_THRESH_VAL_L_MASK GENMASK(5, 0)
+#define ADXL367_THRESH_L_MASK GENMASK(7, 2)
+
+#define ADXL367_REG_TIME_ACT 0x22
+#define ADXL367_REG_TIME_INACT_H 0x25
+#define ADXL367_TIME_ACT_MAX GENMASK(7, 0)
+#define ADXL367_TIME_INACT_MAX GENMASK(15, 0)
+#define ADXL367_TIME_INACT_VAL_H_MASK GENMASK(15, 8)
+#define ADXL367_TIME_INACT_H_MASK GENMASK(7, 0)
+#define ADXL367_TIME_INACT_VAL_L_MASK GENMASK(7, 0)
+#define ADXL367_TIME_INACT_L_MASK GENMASK(7, 0)
+
+#define ADXL367_REG_ACT_INACT_CTL 0x27
+#define ADXL367_ACT_EN_MASK GENMASK(1, 0)
+#define ADXL367_ACT_LINKLOOP_MASK GENMASK(5, 4)
+
+#define ADXL367_REG_FIFO_CTL 0x28
+#define ADXL367_FIFO_CTL_FORMAT_MASK GENMASK(6, 3)
+#define ADXL367_FIFO_CTL_MODE_MASK GENMASK(1, 0)
+
+#define ADXL367_REG_FIFO_SAMPLES 0x29
+#define ADXL367_FIFO_SIZE 512
+#define ADXL367_FIFO_MAX_WATERMARK 511
+
+#define ADXL367_SAMPLES_VAL_H_MASK BIT(8)
+#define ADXL367_SAMPLES_H_MASK BIT(2)
+#define ADXL367_SAMPLES_VAL_L_MASK GENMASK(7, 0)
+#define ADXL367_SAMPLES_L_MASK GENMASK(7, 0)
+
+#define ADXL367_REG_INT1_MAP 0x2A
+#define ADXL367_INT_INACT_MASK BIT(5)
+#define ADXL367_INT_ACT_MASK BIT(4)
+#define ADXL367_INT_FIFO_WATERMARK_MASK BIT(2)
+
+#define ADXL367_REG_FILTER_CTL 0x2C
+#define ADXL367_FILTER_CTL_RANGE_MASK GENMASK(7, 6)
+#define ADXL367_2G_RANGE_1G 4095
+#define ADXL367_2G_RANGE_100MG 409
+#define ADXL367_FILTER_CTL_ODR_MASK GENMASK(2, 0)
+
+#define ADXL367_REG_POWER_CTL 0x2D
+#define ADXL367_POWER_CTL_MODE_MASK GENMASK(1, 0)
+
+#define ADXL367_REG_ADC_CTL 0x3C
+#define ADXL367_REG_TEMP_CTL 0x3D
+#define ADXL367_ADC_EN_MASK BIT(0)
+
+enum adxl367_range {
+ ADXL367_2G_RANGE,
+ ADXL367_4G_RANGE,
+ ADXL367_8G_RANGE,
+};
+
+enum adxl367_fifo_mode {
+ ADXL367_FIFO_MODE_DISABLED = 0b00,
+ ADXL367_FIFO_MODE_STREAM = 0b10,
+};
+
+enum adxl367_fifo_format {
+ ADXL367_FIFO_FORMAT_XYZ,
+ ADXL367_FIFO_FORMAT_X,
+ ADXL367_FIFO_FORMAT_Y,
+ ADXL367_FIFO_FORMAT_Z,
+ ADXL367_FIFO_FORMAT_XYZT,
+ ADXL367_FIFO_FORMAT_XT,
+ ADXL367_FIFO_FORMAT_YT,
+ ADXL367_FIFO_FORMAT_ZT,
+ ADXL367_FIFO_FORMAT_XYZA,
+ ADXL367_FIFO_FORMAT_XA,
+ ADXL367_FIFO_FORMAT_YA,
+ ADXL367_FIFO_FORMAT_ZA,
+};
+
+enum adxl367_op_mode {
+ ADXL367_OP_STANDBY = 0b00,
+ ADXL367_OP_MEASURE = 0b10,
+};
+
+enum adxl367_act_proc_mode {
+ ADXL367_LOOPED = 0b11,
+};
+
+enum adxl367_act_en_mode {
+ ADXL367_ACT_DISABLED = 0b00,
+ ADCL367_ACT_REF_ENABLED = 0b11,
+};
+
+enum adxl367_activity_type {
+ ADXL367_ACTIVITY,
+ ADXL367_INACTIVITY,
+};
+
+enum adxl367_odr {
+ ADXL367_ODR_12P5HZ,
+ ADXL367_ODR_25HZ,
+ ADXL367_ODR_50HZ,
+ ADXL367_ODR_100HZ,
+ ADXL367_ODR_200HZ,
+ ADXL367_ODR_400HZ,
+};
+
+struct adxl367_state {
+ const struct adxl367_ops *ops;
+ void *context;
+
+ struct device *dev;
+ struct regmap *regmap;
+
+ struct regulator_bulk_data regulators[2];
+
+ /*
+ * Synchronize access to members of driver state, and ensure atomicity
+ * of consecutive regmap operations.
+ */
+ struct mutex lock;
+
+ enum adxl367_odr odr;
+ enum adxl367_range range;
+
+ unsigned int act_threshold;
+ unsigned int act_time_ms;
+ unsigned int inact_threshold;
+ unsigned int inact_time_ms;
+
+ unsigned int fifo_set_size;
+ unsigned int fifo_watermark;
+
+ __be16 fifo_buf[ADXL367_FIFO_SIZE] ____cacheline_aligned;
+ __be16 sample_buf;
+ u8 act_threshold_buf[2];
+ u8 inact_time_buf[2];
+ u8 status_buf[3];
+};
+
+static const unsigned int adxl367_threshold_h_reg_tbl[] = {
+ [ADXL367_ACTIVITY] = ADXL367_REG_THRESH_ACT_H,
+ [ADXL367_INACTIVITY] = ADXL367_REG_THRESH_INACT_H,
+};
+
+static const unsigned int adxl367_act_en_shift_tbl[] = {
+ [ADXL367_ACTIVITY] = 0,
+ [ADXL367_INACTIVITY] = 2,
+};
+
+static const unsigned int adxl367_act_int_mask_tbl[] = {
+ [ADXL367_ACTIVITY] = ADXL367_INT_ACT_MASK,
+ [ADXL367_INACTIVITY] = ADXL367_INT_INACT_MASK,
+};
+
+static const int adxl367_samp_freq_tbl[][2] = {
+ [ADXL367_ODR_12P5HZ] = {12, 500000},
+ [ADXL367_ODR_25HZ] = {25, 0},
+ [ADXL367_ODR_50HZ] = {50, 0},
+ [ADXL367_ODR_100HZ] = {100, 0},
+ [ADXL367_ODR_200HZ] = {200, 0},
+ [ADXL367_ODR_400HZ] = {400, 0},
+};
+
+/* (g * 2) * 9.80665 * 1000000 / (2^14 - 1) */
+static const int adxl367_range_scale_tbl[][2] = {
+ [ADXL367_2G_RANGE] = {0, 2394347},
+ [ADXL367_4G_RANGE] = {0, 4788695},
+ [ADXL367_8G_RANGE] = {0, 9577391},
+};
+
+static const int adxl367_range_scale_factor_tbl[] = {
+ [ADXL367_2G_RANGE] = 1,
+ [ADXL367_4G_RANGE] = 2,
+ [ADXL367_8G_RANGE] = 4,
+};
+
+enum {
+ ADXL367_X_CHANNEL_INDEX,
+ ADXL367_Y_CHANNEL_INDEX,
+ ADXL367_Z_CHANNEL_INDEX,
+ ADXL367_TEMP_CHANNEL_INDEX,
+ ADXL367_EX_ADC_CHANNEL_INDEX
+};
+
+#define ADXL367_X_CHANNEL_MASK BIT(ADXL367_X_CHANNEL_INDEX)
+#define ADXL367_Y_CHANNEL_MASK BIT(ADXL367_Y_CHANNEL_INDEX)
+#define ADXL367_Z_CHANNEL_MASK BIT(ADXL367_Z_CHANNEL_INDEX)
+#define ADXL367_TEMP_CHANNEL_MASK BIT(ADXL367_TEMP_CHANNEL_INDEX)
+#define ADXL367_EX_ADC_CHANNEL_MASK BIT(ADXL367_EX_ADC_CHANNEL_INDEX)
+
+static const unsigned long adxl367_channel_masks[] = {
+ [ADXL367_FIFO_FORMAT_XYZ] = ADXL367_X_CHANNEL_MASK
+ | ADXL367_Y_CHANNEL_MASK
+ | ADXL367_Z_CHANNEL_MASK,
+ [ADXL367_FIFO_FORMAT_X] = ADXL367_X_CHANNEL_MASK,
+ [ADXL367_FIFO_FORMAT_Y] = ADXL367_Y_CHANNEL_MASK,
+ [ADXL367_FIFO_FORMAT_Z] = ADXL367_Z_CHANNEL_MASK,
+ [ADXL367_FIFO_FORMAT_XYZT] = ADXL367_X_CHANNEL_MASK
+ | ADXL367_Y_CHANNEL_MASK
+ | ADXL367_Z_CHANNEL_MASK
+ | ADXL367_TEMP_CHANNEL_MASK,
+ [ADXL367_FIFO_FORMAT_XT] = ADXL367_X_CHANNEL_MASK
+ | ADXL367_TEMP_CHANNEL_MASK,
+ [ADXL367_FIFO_FORMAT_YT] = ADXL367_Y_CHANNEL_MASK
+ | ADXL367_TEMP_CHANNEL_MASK,
+ [ADXL367_FIFO_FORMAT_ZT] = ADXL367_Z_CHANNEL_MASK
+ | ADXL367_TEMP_CHANNEL_MASK,
+ [ADXL367_FIFO_FORMAT_XYZA] = ADXL367_X_CHANNEL_MASK
+ | ADXL367_Y_CHANNEL_MASK
+ | ADXL367_Z_CHANNEL_MASK
+ | ADXL367_EX_ADC_CHANNEL_MASK,
+ [ADXL367_FIFO_FORMAT_XA] = ADXL367_X_CHANNEL_MASK
+ | ADXL367_EX_ADC_CHANNEL_MASK,
+ [ADXL367_FIFO_FORMAT_YA] = ADXL367_Y_CHANNEL_MASK
+ | ADXL367_EX_ADC_CHANNEL_MASK,
+ [ADXL367_FIFO_FORMAT_ZA] = ADXL367_Z_CHANNEL_MASK
+ | ADXL367_EX_ADC_CHANNEL_MASK,
+ 0,
+};
+
+static int adxl367_set_measure_en(struct adxl367_state *st, bool en)
+{
+ enum adxl367_op_mode op_mode = en ? ADXL367_OP_MEASURE
+ : ADXL367_OP_STANDBY;
+ int ret;
+
+ ret = regmap_update_bits(st->regmap, ADXL367_REG_POWER_CTL,
+ ADXL367_POWER_CTL_MODE_MASK,
+ FIELD_PREP(ADXL367_POWER_CTL_MODE_MASK,
+ op_mode));
+ if (ret)
+ return ret;
+
+ /*
+ * Wait for acceleration output to settle after entering
+ * measure mode.
+ */
+ if (en)
+ msleep(100);
+
+ return 0;
+}
+
+static void adxl367_scale_act_thresholds(struct adxl367_state *st,
+ enum adxl367_range old_range,
+ enum adxl367_range new_range)
+{
+ st->act_threshold = st->act_threshold
+ * adxl367_range_scale_factor_tbl[old_range]
+ / adxl367_range_scale_factor_tbl[new_range];
+ st->inact_threshold = st->inact_threshold
+ * adxl367_range_scale_factor_tbl[old_range]
+ / adxl367_range_scale_factor_tbl[new_range];
+}
+
+static int _adxl367_set_act_threshold(struct adxl367_state *st,
+ enum adxl367_activity_type act,
+ unsigned int threshold)
+{
+ u8 reg = adxl367_threshold_h_reg_tbl[act];
+ int ret;
+
+ if (threshold > ADXL367_THRESH_MAX)
+ return -EINVAL;
+
+ st->act_threshold_buf[0] = FIELD_PREP(ADXL367_THRESH_H_MASK,
+ FIELD_GET(ADXL367_THRESH_VAL_H_MASK,
+ threshold));
+ st->act_threshold_buf[1] = FIELD_PREP(ADXL367_THRESH_L_MASK,
+ FIELD_GET(ADXL367_THRESH_VAL_L_MASK,
+ threshold));
+
+ ret = regmap_bulk_write(st->regmap, reg, st->act_threshold_buf,
+ sizeof(st->act_threshold_buf));
+ if (ret)
+ return ret;
+
+ if (act == ADXL367_ACTIVITY)
+ st->act_threshold = threshold;
+ else
+ st->inact_threshold = threshold;
+
+ return 0;
+}
+
+static int adxl367_set_act_threshold(struct adxl367_state *st,
+ enum adxl367_activity_type act,
+ unsigned int threshold)
+{
+ int ret;
+
+ mutex_lock(&st->lock);
+
+ ret = adxl367_set_measure_en(st, false);
+ if (ret)
+ goto out;
+
+ ret = _adxl367_set_act_threshold(st, act, threshold);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_measure_en(st, true);
+
+out:
+ mutex_unlock(&st->lock);
+
+ return ret;
+}
+
+static int adxl367_set_act_proc_mode(struct adxl367_state *st,
+ enum adxl367_act_proc_mode mode)
+{
+ return regmap_update_bits(st->regmap, ADXL367_REG_ACT_INACT_CTL,
+ ADXL367_ACT_LINKLOOP_MASK,
+ FIELD_PREP(ADXL367_ACT_LINKLOOP_MASK,
+ mode));
+}
+
+static int adxl367_set_act_interrupt_en(struct adxl367_state *st,
+ enum adxl367_activity_type act,
+ bool en)
+{
+ unsigned int mask = adxl367_act_int_mask_tbl[act];
+
+ return regmap_update_bits(st->regmap, ADXL367_REG_INT1_MAP,
+ mask, en ? mask : 0);
+}
+
+static int adxl367_get_act_interrupt_en(struct adxl367_state *st,
+ enum adxl367_activity_type act,
+ bool *en)
+{
+ unsigned int mask = adxl367_act_int_mask_tbl[act];
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(st->regmap, ADXL367_REG_INT1_MAP, &val);
+ if (ret)
+ return ret;
+
+ *en = !!(val & mask);
+
+ return 0;
+}
+
+static int adxl367_set_act_en(struct adxl367_state *st,
+ enum adxl367_activity_type act,
+ enum adxl367_act_en_mode en)
+{
+ unsigned int ctl_shift = adxl367_act_en_shift_tbl[act];
+
+ return regmap_update_bits(st->regmap, ADXL367_REG_ACT_INACT_CTL,
+ ADXL367_ACT_EN_MASK << ctl_shift,
+ en << ctl_shift);
+}
+
+static int adxl367_set_fifo_watermark_interrupt_en(struct adxl367_state *st,
+ bool en)
+{
+ return regmap_update_bits(st->regmap, ADXL367_REG_INT1_MAP,
+ ADXL367_INT_FIFO_WATERMARK_MASK,
+ en ? ADXL367_INT_FIFO_WATERMARK_MASK : 0);
+}
+
+static int adxl367_get_fifo_mode(struct adxl367_state *st,
+ enum adxl367_fifo_mode *fifo_mode)
+{
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(st->regmap, ADXL367_REG_FIFO_CTL, &val);
+ if (ret)
+ return ret;
+
+ *fifo_mode = FIELD_GET(ADXL367_FIFO_CTL_MODE_MASK, val);
+
+ return 0;
+}
+
+static int adxl367_set_fifo_mode(struct adxl367_state *st,
+ enum adxl367_fifo_mode fifo_mode)
+{
+ return regmap_update_bits(st->regmap, ADXL367_REG_FIFO_CTL,
+ ADXL367_FIFO_CTL_MODE_MASK,
+ FIELD_PREP(ADXL367_FIFO_CTL_MODE_MASK,
+ fifo_mode));
+}
+
+static int adxl367_set_fifo_format(struct adxl367_state *st,
+ enum adxl367_fifo_format fifo_format)
+{
+ return regmap_update_bits(st->regmap, ADXL367_REG_FIFO_CTL,
+ ADXL367_FIFO_CTL_FORMAT_MASK,
+ FIELD_PREP(ADXL367_FIFO_CTL_FORMAT_MASK,
+ fifo_format));
+}
+
+static int adxl367_set_fifo_samples(struct adxl367_state *st,
+ unsigned int fifo_watermark,
+ unsigned int fifo_set_size)
+{
+ unsigned int fifo_samples = fifo_watermark * fifo_set_size;
+ unsigned int fifo_samples_h, fifo_samples_l;
+ int ret;
+
+ if (fifo_samples > ADXL367_FIFO_MAX_WATERMARK)
+ fifo_samples = ADXL367_FIFO_MAX_WATERMARK;
+
+ if (fifo_set_size == 0)
+ return 0;
+
+ fifo_samples /= fifo_set_size;
+
+ fifo_samples_h = FIELD_PREP(ADXL367_SAMPLES_H_MASK,
+ FIELD_GET(ADXL367_SAMPLES_VAL_H_MASK,
+ fifo_samples));
+ fifo_samples_l = FIELD_PREP(ADXL367_SAMPLES_L_MASK,
+ FIELD_GET(ADXL367_SAMPLES_VAL_L_MASK,
+ fifo_samples));
+
+ ret = regmap_update_bits(st->regmap, ADXL367_REG_FIFO_CTL,
+ ADXL367_SAMPLES_H_MASK, fifo_samples_h);
+ if (ret)
+ return ret;
+
+ return regmap_update_bits(st->regmap, ADXL367_REG_FIFO_SAMPLES,
+ ADXL367_SAMPLES_L_MASK, fifo_samples_l);
+}
+
+static int adxl367_set_fifo_set_size(struct adxl367_state *st,
+ unsigned int fifo_set_size)
+{
+ int ret;
+
+ ret = adxl367_set_fifo_samples(st, st->fifo_watermark, fifo_set_size);
+ if (ret)
+ return ret;
+
+ st->fifo_set_size = fifo_set_size;
+
+ return 0;
+}
+
+static int adxl367_set_fifo_watermark(struct adxl367_state *st,
+ unsigned int fifo_watermark)
+{
+ int ret;
+
+ ret = adxl367_set_fifo_samples(st, fifo_watermark, st->fifo_set_size);
+ if (ret)
+ return ret;
+
+ st->fifo_watermark = fifo_watermark;
+
+ return 0;
+}
+
+static int adxl367_set_range(struct iio_dev *indio_dev,
+ enum adxl367_range range)
+{
+ struct adxl367_state *st = iio_priv(indio_dev);
+ int ret;
+
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ mutex_lock(&st->lock);
+
+ ret = adxl367_set_measure_en(st, false);
+ if (ret)
+ goto out;
+
+ ret = regmap_update_bits(st->regmap, ADXL367_REG_FILTER_CTL,
+ ADXL367_FILTER_CTL_RANGE_MASK,
+ FIELD_PREP(ADXL367_FILTER_CTL_RANGE_MASK,
+ range));
+ if (ret)
+ goto out;
+
+ adxl367_scale_act_thresholds(st, st->range, range);
+
+ /* Activity thresholds depend on range */
+ ret = _adxl367_set_act_threshold(st, ADXL367_ACTIVITY,
+ st->act_threshold);
+ if (ret)
+ goto out;
+
+ ret = _adxl367_set_act_threshold(st, ADXL367_INACTIVITY,
+ st->inact_threshold);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_measure_en(st, true);
+ if (ret)
+ goto out;
+
+ st->range = range;
+
+out:
+ mutex_unlock(&st->lock);
+
+ iio_device_release_direct_mode(indio_dev);
+
+ return ret;
+}
+
+static int adxl367_time_ms_to_samples(struct adxl367_state *st, unsigned int ms)
+{
+ int freq_hz = adxl367_samp_freq_tbl[st->odr][0];
+ int freq_microhz = adxl367_samp_freq_tbl[st->odr][1];
+ /* Scale to decihertz to prevent precision loss in 12.5Hz case. */
+ int freq_dhz = freq_hz * 10 + freq_microhz / 100000;
+
+ return DIV_ROUND_CLOSEST(ms * freq_dhz, 10000);
+}
+
+static int _adxl367_set_act_time_ms(struct adxl367_state *st, unsigned int ms)
+{
+ unsigned int val = adxl367_time_ms_to_samples(st, ms);
+ int ret;
+
+ if (val > ADXL367_TIME_ACT_MAX)
+ val = ADXL367_TIME_ACT_MAX;
+
+ ret = regmap_write(st->regmap, ADXL367_REG_TIME_ACT, val);
+ if (ret)
+ return ret;
+
+ st->act_time_ms = ms;
+
+ return 0;
+}
+
+static int _adxl367_set_inact_time_ms(struct adxl367_state *st, unsigned int ms)
+{
+ unsigned int val = adxl367_time_ms_to_samples(st, ms);
+ int ret;
+
+ if (val > ADXL367_TIME_INACT_MAX)
+ val = ADXL367_TIME_INACT_MAX;
+
+ st->inact_time_buf[0] = FIELD_PREP(ADXL367_TIME_INACT_H_MASK,
+ FIELD_GET(ADXL367_TIME_INACT_VAL_H_MASK,
+ val));
+ st->inact_time_buf[1] = FIELD_PREP(ADXL367_TIME_INACT_L_MASK,
+ FIELD_GET(ADXL367_TIME_INACT_VAL_L_MASK,
+ val));
+
+ ret = regmap_bulk_write(st->regmap, ADXL367_REG_TIME_INACT_H,
+ st->inact_time_buf, sizeof(st->inact_time_buf));
+ if (ret)
+ return ret;
+
+ st->inact_time_ms = ms;
+
+ return 0;
+}
+
+static int adxl367_set_act_time_ms(struct adxl367_state *st,
+ enum adxl367_activity_type act,
+ unsigned int ms)
+{
+ int ret;
+
+ mutex_lock(&st->lock);
+
+ ret = adxl367_set_measure_en(st, false);
+ if (ret)
+ goto out;
+
+ if (act == ADXL367_ACTIVITY)
+ ret = _adxl367_set_act_time_ms(st, ms);
+ else
+ ret = _adxl367_set_inact_time_ms(st, ms);
+
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_measure_en(st, true);
+
+out:
+ mutex_unlock(&st->lock);
+
+ return ret;
+}
+
+static int _adxl367_set_odr(struct adxl367_state *st, enum adxl367_odr odr)
+{
+ int ret;
+
+ ret = regmap_update_bits(st->regmap, ADXL367_REG_FILTER_CTL,
+ ADXL367_FILTER_CTL_ODR_MASK,
+ FIELD_PREP(ADXL367_FILTER_CTL_ODR_MASK,
+ odr));
+ if (ret)
+ return ret;
+
+ /* Activity timers depend on ODR */
+ ret = _adxl367_set_act_time_ms(st, st->act_time_ms);
+ if (ret)
+ return ret;
+
+ ret = _adxl367_set_inact_time_ms(st, st->inact_time_ms);
+ if (ret)
+ return ret;
+
+ st->odr = odr;
+
+ return 0;
+}
+
+static int adxl367_set_odr(struct iio_dev *indio_dev, enum adxl367_odr odr)
+{
+ struct adxl367_state *st = iio_priv(indio_dev);
+ int ret;
+
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ mutex_lock(&st->lock);
+
+ ret = adxl367_set_measure_en(st, false);
+ if (ret)
+ goto out;
+
+ ret = _adxl367_set_odr(st, odr);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_measure_en(st, true);
+
+out:
+ mutex_unlock(&st->lock);
+
+ iio_device_release_direct_mode(indio_dev);
+
+ return ret;
+}
+
+static int adxl367_set_temp_adc_en(struct adxl367_state *st, unsigned int reg,
+ bool en)
+{
+ return regmap_update_bits(st->regmap, reg, ADXL367_ADC_EN_MASK,
+ en ? ADXL367_ADC_EN_MASK : 0);
+}
+
+static int adxl367_set_temp_adc_reg_en(struct adxl367_state *st,
+ unsigned int reg, bool en)
+{
+ int ret;
+
+ switch (reg) {
+ case ADXL367_REG_TEMP_DATA_H:
+ ret = adxl367_set_temp_adc_en(st, ADXL367_REG_TEMP_CTL, en);
+ break;
+ case ADXL367_REG_EX_ADC_DATA_H:
+ ret = adxl367_set_temp_adc_en(st, ADXL367_REG_ADC_CTL, en);
+ break;
+ default:
+ return 0;
+ }
+
+ if (ret)
+ return ret;
+
+ if (en)
+ msleep(100);
+
+ return 0;
+}
+
+static int adxl367_set_temp_adc_mask_en(struct adxl367_state *st,
+ const unsigned long *active_scan_mask,
+ bool en)
+{
+ if (*active_scan_mask & ADXL367_TEMP_CHANNEL_MASK)
+ return adxl367_set_temp_adc_en(st, ADXL367_REG_TEMP_CTL, en);
+ else if (*active_scan_mask & ADXL367_EX_ADC_CHANNEL_MASK)
+ return adxl367_set_temp_adc_en(st, ADXL367_REG_ADC_CTL, en);
+
+ return 0;
+}
+
+static int adxl367_find_odr(struct adxl367_state *st, int val, int val2,
+ enum adxl367_odr *odr)
+{
+ size_t size = ARRAY_SIZE(adxl367_samp_freq_tbl);
+ int i;
+
+ for (i = 0; i < size; i++)
+ if (val == adxl367_samp_freq_tbl[i][0] &&
+ val2 == adxl367_samp_freq_tbl[i][1])
+ break;
+
+ if (i == size)
+ return -EINVAL;
+
+ *odr = i;
+
+ return 0;
+}
+
+static int adxl367_find_range(struct adxl367_state *st, int val, int val2,
+ enum adxl367_range *range)
+{
+ size_t size = ARRAY_SIZE(adxl367_range_scale_tbl);
+ int i;
+
+ for (i = 0; i < size; i++)
+ if (val == adxl367_range_scale_tbl[i][0] &&
+ val2 == adxl367_range_scale_tbl[i][1])
+ break;
+
+ if (i == size)
+ return -EINVAL;
+
+ *range = i;
+
+ return 0;
+}
+
+static int adxl367_read_sample(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val)
+{
+ struct adxl367_state *st = iio_priv(indio_dev);
+ u16 sample;
+ int ret;
+
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ mutex_lock(&st->lock);
+
+ ret = adxl367_set_temp_adc_reg_en(st, chan->address, true);
+ if (ret)
+ goto out;
+
+ ret = regmap_bulk_read(st->regmap, chan->address, &st->sample_buf,
+ sizeof(st->sample_buf));
+ if (ret)
+ goto out;
+
+ sample = FIELD_GET(ADXL367_DATA_MASK, be16_to_cpu(st->sample_buf));
+ *val = sign_extend32(sample, chan->scan_type.realbits - 1);
+
+ ret = adxl367_set_temp_adc_reg_en(st, chan->address, false);
+
+out:
+ mutex_unlock(&st->lock);
+
+ iio_device_release_direct_mode(indio_dev);
+
+ return ret ?: IIO_VAL_INT;
+}
+
+static int adxl367_get_status(struct adxl367_state *st, u8 *status,
+ u16 *fifo_entries)
+{
+ int ret;
+
+ /* Read STATUS, FIFO_ENT_L and FIFO_ENT_H */
+ ret = regmap_bulk_read(st->regmap, ADXL367_REG_STATUS,
+ st->status_buf, sizeof(st->status_buf));
+ if (ret)
+ return ret;
+
+ st->status_buf[2] &= ADXL367_FIFO_ENT_H_MASK;
+
+ *status = st->status_buf[0];
+ *fifo_entries = get_unaligned_le16(&st->status_buf[1]);
+
+ return 0;
+}
+
+static bool adxl367_push_event(struct iio_dev *indio_dev, u8 status)
+{
+ unsigned int ev_dir;
+
+ if (FIELD_GET(ADXL367_STATUS_ACT_MASK, status))
+ ev_dir = IIO_EV_DIR_RISING;
+ else if (FIELD_GET(ADXL367_STATUS_INACT_MASK, status))
+ ev_dir = IIO_EV_DIR_FALLING;
+ else
+ return false;
+
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X_OR_Y_OR_Z,
+ IIO_EV_TYPE_THRESH, ev_dir),
+ iio_get_time_ns(indio_dev));
+
+ return true;
+}
+
+static bool adxl367_push_fifo_data(struct iio_dev *indio_dev, u8 status,
+ u16 fifo_entries)
+{
+ struct adxl367_state *st = iio_priv(indio_dev);
+ int ret;
+ int i;
+
+ if (!FIELD_GET(ADXL367_STATUS_FIFO_FULL_MASK, status))
+ return false;
+
+ fifo_entries -= fifo_entries % st->fifo_set_size;
+
+ ret = st->ops->read_fifo(st->context, st->fifo_buf, fifo_entries);
+ if (ret) {
+ dev_err(st->dev, "Failed to read FIFO: %d\n", ret);
+ return true;
+ }
+
+ for (i = 0; i < fifo_entries; i += st->fifo_set_size)
+ iio_push_to_buffers(indio_dev, &st->fifo_buf[i]);
+
+ return true;
+}
+
+static irqreturn_t adxl367_irq_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct adxl367_state *st = iio_priv(indio_dev);
+ u16 fifo_entries;
+ bool handled;
+ u8 status;
+ int ret;
+
+ ret = adxl367_get_status(st, &status, &fifo_entries);
+ if (ret)
+ return IRQ_NONE;
+
+ handled |= adxl367_push_event(indio_dev, status);
+ handled |= adxl367_push_fifo_data(indio_dev, status, fifo_entries);
+
+ return handled ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static int adxl367_reg_access(struct iio_dev *indio_dev,
+ unsigned int reg,
+ unsigned int writeval,
+ unsigned int *readval)
+{
+ struct adxl367_state *st = iio_priv(indio_dev);
+
+ if (readval)
+ return regmap_read(st->regmap, reg, readval);
+ else
+ return regmap_write(st->regmap, reg, writeval);
+}
+
+static int adxl367_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long info)
+{
+ struct adxl367_state *st = iio_priv(indio_dev);
+
+ switch (info) {
+ case IIO_CHAN_INFO_RAW:
+ return adxl367_read_sample(indio_dev, chan, val);
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_ACCEL:
+ mutex_lock(&st->lock);
+ *val = adxl367_range_scale_tbl[st->range][0];
+ *val2 = adxl367_range_scale_tbl[st->range][1];
+ mutex_unlock(&st->lock);
+ return IIO_VAL_INT_PLUS_NANO;
+ case IIO_TEMP:
+ *val = 1000;
+ *val2 = ADXL367_TEMP_PER_C;
+ return IIO_VAL_FRACTIONAL;
+ case IIO_VOLTAGE:
+ *val = ADXL367_VOLTAGE_MAX_MV;
+ *val2 = ADXL367_VOLTAGE_MAX_RAW;
+ return IIO_VAL_FRACTIONAL;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_OFFSET:
+ switch (chan->type) {
+ case IIO_TEMP:
+ *val = 25 * ADXL367_TEMP_PER_C - ADXL367_TEMP_25C;
+ return IIO_VAL_INT;
+ case IIO_VOLTAGE:
+ *val = ADXL367_VOLTAGE_OFFSET;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ mutex_lock(&st->lock);
+ *val = adxl367_samp_freq_tbl[st->odr][0];
+ *val2 = adxl367_samp_freq_tbl[st->odr][1];
+ mutex_unlock(&st->lock);
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int adxl367_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long info)
+{
+ struct adxl367_state *st = iio_priv(indio_dev);
+ int ret;
+
+ switch (info) {
+ case IIO_CHAN_INFO_SAMP_FREQ: {
+ enum adxl367_odr odr;
+
+ ret = adxl367_find_odr(st, val, val2, &odr);
+ if (ret)
+ return ret;
+
+ return adxl367_set_odr(indio_dev, odr);
+ }
+ case IIO_CHAN_INFO_SCALE: {
+ enum adxl367_range range;
+
+ ret = adxl367_find_range(st, val, val2, &range);
+ if (ret)
+ return ret;
+
+ return adxl367_set_range(indio_dev, range);
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int adxl367_write_raw_get_fmt(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ long info)
+{
+ switch (info) {
+ case IIO_CHAN_INFO_SCALE:
+ if (chan->type != IIO_ACCEL)
+ return -EINVAL;
+
+ return IIO_VAL_INT_PLUS_NANO;
+ default:
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+}
+
+static int adxl367_read_avail(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ const int **vals, int *type, int *length,
+ long info)
+{
+ switch (info) {
+ case IIO_CHAN_INFO_SCALE:
+ if (chan->type != IIO_ACCEL)
+ return -EINVAL;
+
+ *vals = (int *)adxl367_range_scale_tbl;
+ *type = IIO_VAL_INT_PLUS_NANO;
+ *length = ARRAY_SIZE(adxl367_range_scale_tbl) * 2;
+ return IIO_AVAIL_LIST;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ *vals = (int *)adxl367_samp_freq_tbl;
+ *type = IIO_VAL_INT_PLUS_MICRO;
+ *length = ARRAY_SIZE(adxl367_samp_freq_tbl) * 2;
+ return IIO_AVAIL_LIST;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int adxl367_read_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct adxl367_state *st = iio_priv(indio_dev);
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE: {
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ mutex_lock(&st->lock);
+ *val = st->act_threshold;
+ mutex_unlock(&st->lock);
+ return IIO_VAL_INT;
+ case IIO_EV_DIR_FALLING:
+ mutex_lock(&st->lock);
+ *val = st->inact_threshold;
+ mutex_unlock(&st->lock);
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ }
+ case IIO_EV_INFO_PERIOD:
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ mutex_lock(&st->lock);
+ *val = st->act_time_ms;
+ mutex_unlock(&st->lock);
+ *val2 = 1000;
+ return IIO_VAL_FRACTIONAL;
+ case IIO_EV_DIR_FALLING:
+ mutex_lock(&st->lock);
+ *val = st->inact_time_ms;
+ mutex_unlock(&st->lock);
+ *val2 = 1000;
+ return IIO_VAL_FRACTIONAL;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int adxl367_write_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ struct adxl367_state *st = iio_priv(indio_dev);
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ if (val < 0)
+ return -EINVAL;
+
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ return adxl367_set_act_threshold(st, ADXL367_ACTIVITY, val);
+ case IIO_EV_DIR_FALLING:
+ return adxl367_set_act_threshold(st, ADXL367_INACTIVITY, val);
+ default:
+ return -EINVAL;
+ }
+ case IIO_EV_INFO_PERIOD:
+ if (val < 0)
+ return -EINVAL;
+
+ val = val * 1000 + DIV_ROUND_UP(val2, 1000);
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ return adxl367_set_act_time_ms(st, ADXL367_ACTIVITY, val);
+ case IIO_EV_DIR_FALLING:
+ return adxl367_set_act_time_ms(st, ADXL367_INACTIVITY, val);
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int adxl367_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct adxl367_state *st = iio_priv(indio_dev);
+ bool en;
+ int ret;
+
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ ret = adxl367_get_act_interrupt_en(st, ADXL367_ACTIVITY, &en);
+ return ret ?: en;
+ case IIO_EV_DIR_FALLING:
+ ret = adxl367_get_act_interrupt_en(st, ADXL367_INACTIVITY, &en);
+ return ret ?: en;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int adxl367_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ int state)
+{
+ struct adxl367_state *st = iio_priv(indio_dev);
+ enum adxl367_activity_type act;
+ int ret;
+
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ act = ADXL367_ACTIVITY;
+ break;
+ case IIO_EV_DIR_FALLING:
+ act = ADXL367_INACTIVITY;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ mutex_lock(&st->lock);
+
+ ret = adxl367_set_measure_en(st, false);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_act_interrupt_en(st, act, state);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_act_en(st, act, state ? ADCL367_ACT_REF_ENABLED
+ : ADXL367_ACT_DISABLED);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_measure_en(st, true);
+
+out:
+ mutex_unlock(&st->lock);
+
+ iio_device_release_direct_mode(indio_dev);
+
+ return ret;
+}
+
+static ssize_t adxl367_get_fifo_enabled(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct adxl367_state *st = iio_priv(dev_to_iio_dev(dev));
+ enum adxl367_fifo_mode fifo_mode;
+ int ret;
+
+ ret = adxl367_get_fifo_mode(st, &fifo_mode);
+ if (ret)
+ return ret;
+
+ return sysfs_emit(buf, "%d\n", fifo_mode != ADXL367_FIFO_MODE_DISABLED);
+}
+
+static ssize_t adxl367_get_fifo_watermark(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct adxl367_state *st = iio_priv(dev_to_iio_dev(dev));
+ unsigned int fifo_watermark;
+
+ mutex_lock(&st->lock);
+ fifo_watermark = st->fifo_watermark;
+ mutex_unlock(&st->lock);
+
+ return sysfs_emit(buf, "%d\n", fifo_watermark);
+}
+
+static IIO_CONST_ATTR(hwfifo_watermark_min, "1");
+static IIO_CONST_ATTR(hwfifo_watermark_max,
+ __stringify(ADXL367_FIFO_MAX_WATERMARK));
+static IIO_DEVICE_ATTR(hwfifo_watermark, 0444,
+ adxl367_get_fifo_watermark, NULL, 0);
+static IIO_DEVICE_ATTR(hwfifo_enabled, 0444,
+ adxl367_get_fifo_enabled, NULL, 0);
+
+static const struct attribute *adxl367_fifo_attributes[] = {
+ &iio_const_attr_hwfifo_watermark_min.dev_attr.attr,
+ &iio_const_attr_hwfifo_watermark_max.dev_attr.attr,
+ &iio_dev_attr_hwfifo_watermark.dev_attr.attr,
+ &iio_dev_attr_hwfifo_enabled.dev_attr.attr,
+ NULL,
+};
+
+static int adxl367_set_watermark(struct iio_dev *indio_dev, unsigned int val)
+{
+ struct adxl367_state *st = iio_priv(indio_dev);
+ int ret;
+
+ if (val > ADXL367_FIFO_MAX_WATERMARK)
+ return -EINVAL;
+
+ mutex_lock(&st->lock);
+
+ ret = adxl367_set_measure_en(st, false);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_fifo_watermark(st, val);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_measure_en(st, true);
+
+out:
+ mutex_unlock(&st->lock);
+
+ return ret;
+}
+
+static bool adxl367_find_mask_fifo_format(const unsigned long *scan_mask,
+ enum adxl367_fifo_format *fifo_format)
+{
+ size_t size = ARRAY_SIZE(adxl367_channel_masks) - 1;
+ int i;
+
+ for (i = 0; i < size; i++)
+ if (*scan_mask == adxl367_channel_masks[i])
+ break;
+
+ if (i == size)
+ return false;
+
+ *fifo_format = i;
+
+ return true;
+}
+
+static int adxl367_update_scan_mode(struct iio_dev *indio_dev,
+ const unsigned long *active_scan_mask)
+{
+ struct adxl367_state *st = iio_priv(indio_dev);
+ enum adxl367_fifo_format fifo_format;
+ unsigned int fifo_set_size;
+ int ret;
+
+ if (!adxl367_find_mask_fifo_format(active_scan_mask, &fifo_format))
+ return -EINVAL;
+
+ fifo_set_size = bitmap_weight(active_scan_mask, indio_dev->masklength);
+
+ mutex_lock(&st->lock);
+
+ ret = adxl367_set_measure_en(st, false);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_fifo_format(st, fifo_format);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_fifo_set_size(st, fifo_set_size);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_measure_en(st, true);
+
+out:
+ mutex_unlock(&st->lock);
+
+ return ret;
+}
+
+static int adxl367_buffer_postenable(struct iio_dev *indio_dev)
+{
+ struct adxl367_state *st = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&st->lock);
+
+ ret = adxl367_set_temp_adc_mask_en(st, indio_dev->active_scan_mask,
+ true);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_measure_en(st, false);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_fifo_watermark_interrupt_en(st, true);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_fifo_mode(st, ADXL367_FIFO_MODE_STREAM);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_measure_en(st, true);
+
+out:
+ mutex_unlock(&st->lock);
+
+ return ret;
+}
+
+static int adxl367_buffer_predisable(struct iio_dev *indio_dev)
+{
+ struct adxl367_state *st = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&st->lock);
+
+ ret = adxl367_set_measure_en(st, false);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_fifo_mode(st, ADXL367_FIFO_MODE_DISABLED);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_fifo_watermark_interrupt_en(st, false);
+ if (ret)
+ goto out;
+
+ ret = adxl367_set_measure_en(st, true);
+ if (ret)
+ return ret;
+
+ ret = adxl367_set_temp_adc_mask_en(st, indio_dev->active_scan_mask,
+ false);
+
+out:
+ mutex_unlock(&st->lock);
+
+ return ret;
+}
+
+static const struct iio_buffer_setup_ops adxl367_buffer_ops = {
+ .postenable = adxl367_buffer_postenable,
+ .predisable = adxl367_buffer_predisable,
+};
+
+static const struct iio_info adxl367_info = {
+ .read_raw = adxl367_read_raw,
+ .write_raw = adxl367_write_raw,
+ .write_raw_get_fmt = adxl367_write_raw_get_fmt,
+ .read_avail = adxl367_read_avail,
+ .read_event_config = adxl367_read_event_config,
+ .write_event_config = adxl367_write_event_config,
+ .read_event_value = adxl367_read_event_value,
+ .write_event_value = adxl367_write_event_value,
+ .debugfs_reg_access = adxl367_reg_access,
+ .hwfifo_set_watermark = adxl367_set_watermark,
+ .update_scan_mode = adxl367_update_scan_mode,
+};
+
+static const struct iio_event_spec adxl367_events[] = {
+ {
+ .type = IIO_EV_TYPE_MAG_REFERENCED,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_shared_by_type = BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_PERIOD) |
+ BIT(IIO_EV_INFO_VALUE),
+ },
+ {
+ .type = IIO_EV_TYPE_MAG_REFERENCED,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_shared_by_type = BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_PERIOD) |
+ BIT(IIO_EV_INFO_VALUE),
+ },
+};
+
+#define ADXL367_ACCEL_CHANNEL(index, reg, axis) { \
+ .type = IIO_ACCEL, \
+ .address = (reg), \
+ .modified = 1, \
+ .channel2 = IIO_MOD_##axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .info_mask_shared_by_all_available = \
+ BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .event_spec = adxl367_events, \
+ .num_event_specs = ARRAY_SIZE(adxl367_events), \
+ .scan_index = (index), \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 14, \
+ .storagebits = 16, \
+ .endianness = IIO_BE, \
+ }, \
+}
+
+#define ADXL367_CHANNEL(index, reg, _type) { \
+ .type = (_type), \
+ .address = (reg), \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_OFFSET) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_index = (index), \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 14, \
+ .storagebits = 16, \
+ .endianness = IIO_BE, \
+ }, \
+}
+
+static const struct iio_chan_spec adxl367_channels[] = {
+ ADXL367_ACCEL_CHANNEL(ADXL367_X_CHANNEL_INDEX, ADXL367_REG_X_DATA_H, X),
+ ADXL367_ACCEL_CHANNEL(ADXL367_Y_CHANNEL_INDEX, ADXL367_REG_Y_DATA_H, Y),
+ ADXL367_ACCEL_CHANNEL(ADXL367_Z_CHANNEL_INDEX, ADXL367_REG_Z_DATA_H, Z),
+ ADXL367_CHANNEL(ADXL367_TEMP_CHANNEL_INDEX, ADXL367_REG_TEMP_DATA_H,
+ IIO_TEMP),
+ ADXL367_CHANNEL(ADXL367_EX_ADC_CHANNEL_INDEX, ADXL367_REG_EX_ADC_DATA_H,
+ IIO_VOLTAGE),
+};
+
+static int adxl367_verify_devid(struct adxl367_state *st)
+{
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read_poll_timeout(st->regmap, ADXL367_REG_DEVID, val,
+ val == ADXL367_DEVID_AD, 1000, 10000);
+ if (ret)
+ return dev_err_probe(st->dev, -ENODEV,
+ "Invalid dev id 0x%02X, expected 0x%02X\n",
+ val, ADXL367_DEVID_AD);
+
+ return 0;
+}
+
+static int adxl367_setup(struct adxl367_state *st)
+{
+ int ret;
+
+ ret = _adxl367_set_act_threshold(st, ADXL367_ACTIVITY,
+ ADXL367_2G_RANGE_1G);
+ if (ret)
+ return ret;
+
+ ret = _adxl367_set_act_threshold(st, ADXL367_INACTIVITY,
+ ADXL367_2G_RANGE_100MG);
+ if (ret)
+ return ret;
+
+ ret = adxl367_set_act_proc_mode(st, ADXL367_LOOPED);
+ if (ret)
+ return ret;
+
+ ret = _adxl367_set_odr(st, ADXL367_ODR_400HZ);
+ if (ret)
+ return ret;
+
+ ret = _adxl367_set_act_time_ms(st, 10);
+ if (ret)
+ return ret;
+
+ ret = _adxl367_set_inact_time_ms(st, 10000);
+ if (ret)
+ return ret;
+
+ return adxl367_set_measure_en(st, true);
+}
+
+static void adxl367_disable_regulators(void *data)
+{
+ struct adxl367_state *st = data;
+
+ regulator_bulk_disable(ARRAY_SIZE(st->regulators), st->regulators);
+}
+
+int adxl367_probe(struct device *dev, const struct adxl367_ops *ops,
+ void *context, struct regmap *regmap, int irq)
+{
+ struct iio_dev *indio_dev;
+ struct adxl367_state *st;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ st = iio_priv(indio_dev);
+ st->dev = dev;
+ st->regmap = regmap;
+ st->context = context;
+ st->ops = ops;
+
+ mutex_init(&st->lock);
+
+ indio_dev->channels = adxl367_channels;
+ indio_dev->num_channels = ARRAY_SIZE(adxl367_channels);
+ indio_dev->available_scan_masks = adxl367_channel_masks;
+ indio_dev->name = "adxl367";
+ indio_dev->info = &adxl367_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ st->regulators[0].supply = "vdd";
+ st->regulators[1].supply = "vddio";
+
+ ret = devm_regulator_bulk_get(st->dev, ARRAY_SIZE(st->regulators),
+ st->regulators);
+ if (ret)
+ return dev_err_probe(st->dev, ret,
+ "Failed to get regulators\n");
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(st->regulators), st->regulators);
+ if (ret)
+ return dev_err_probe(st->dev, ret,
+ "Failed to enable regulators\n");
+
+ ret = devm_add_action_or_reset(st->dev, adxl367_disable_regulators, st);
+ if (ret)
+ return dev_err_probe(st->dev, ret,
+ "Failed to add regulators disable action\n");
+
+ ret = regmap_write(st->regmap, ADXL367_REG_RESET, ADXL367_RESET_CODE);
+ if (ret)
+ return ret;
+
+ ret = adxl367_verify_devid(st);
+ if (ret)
+ return ret;
+
+ ret = adxl367_setup(st);
+ if (ret)
+ return ret;
+
+ ret = devm_iio_kfifo_buffer_setup_ext(st->dev, indio_dev,
+ INDIO_BUFFER_SOFTWARE,
+ &adxl367_buffer_ops,
+ adxl367_fifo_attributes);
+ if (ret)
+ return ret;
+
+ ret = devm_request_threaded_irq(st->dev, irq, NULL,
+ adxl367_irq_handler, IRQF_ONESHOT,
+ indio_dev->name, indio_dev);
+ if (ret)
+ return dev_err_probe(st->dev, ret, "Failed to request irq\n");
+
+ return devm_iio_device_register(dev, indio_dev);
+}
+EXPORT_SYMBOL_NS_GPL(adxl367_probe, ADXL367);
+
+MODULE_AUTHOR("Cosmin Tanislav <cosmin.tanislav@...log.com>");
+MODULE_DESCRIPTION("Analog Devices ADXL367 3-axis accelerometer driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/adxl367.h b/drivers/iio/accel/adxl367.h
new file mode 100644
index 000000000000..4a42622149b1
--- /dev/null
+++ b/drivers/iio/accel/adxl367.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2021 Analog Devices, Inc.
+ * Author: Cosmin Tanislav <cosmin.tanislav@...log.com>
+ */
+
+#ifndef _ADXL367_H_
+#define _ADXL367_H_
+
+#include <linux/types.h>
+
+struct device;
+struct regmap;
+
+struct adxl367_ops {
+ int (*read_fifo)(void *context, __be16 *fifo_buf,
+ unsigned int fifo_entries);
+};
+
+int adxl367_probe(struct device *dev, const struct adxl367_ops *ops,
+ void *context, struct regmap *regmap, int irq);
+
+#endif /* _ADXL367_H_ */
diff --git a/drivers/iio/accel/adxl367_i2c.c b/drivers/iio/accel/adxl367_i2c.c
new file mode 100644
index 000000000000..250ccd50d964
--- /dev/null
+++ b/drivers/iio/accel/adxl367_i2c.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2021 Analog Devices, Inc.
+ * Author: Cosmin Tanislav <cosmin.tanislav@...log.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "adxl367.h"
+
+#define ADXL367_I2C_FIFO_DATA 0x42
+
+struct adxl367_i2c_state {
+ struct regmap *regmap;
+};
+
+static bool adxl367_readable_noinc_reg(struct device *dev, unsigned int reg)
+{
+ return reg == ADXL367_I2C_FIFO_DATA;
+}
+
+static int adxl367_i2c_read_fifo(void *context, __be16 *fifo_buf,
+ unsigned int fifo_entries)
+{
+ struct adxl367_i2c_state *st = context;
+
+ return regmap_noinc_read(st->regmap, ADXL367_I2C_FIFO_DATA, fifo_buf,
+ fifo_entries * sizeof(*fifo_buf));
+}
+
+static const struct regmap_config adxl367_i2c_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .readable_noinc_reg = adxl367_readable_noinc_reg,
+};
+
+static const struct adxl367_ops adxl367_i2c_ops = {
+ .read_fifo = adxl367_i2c_read_fifo,
+};
+
+static int adxl367_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct adxl367_i2c_state *st;
+ struct regmap *regmap;
+
+ st = devm_kzalloc(&client->dev, sizeof(*st), GFP_KERNEL);
+ if (!st)
+ return -ENOMEM;
+
+ regmap = devm_regmap_init_i2c(client, &adxl367_i2c_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ st->regmap = regmap;
+
+ return adxl367_probe(&client->dev, &adxl367_i2c_ops, st, regmap,
+ client->irq);
+}
+
+static const struct i2c_device_id adxl367_i2c_id[] = {
+ { "adxl367", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, adxl367_i2c_id);
+
+static const struct of_device_id adxl367_of_match[] = {
+ { .compatible = "adi,adxl367" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, adxl367_of_match);
+
+static struct i2c_driver adxl367_i2c_driver = {
+ .driver = {
+ .name = "adxl367_i2c",
+ .of_match_table = adxl367_of_match,
+ },
+ .probe = adxl367_i2c_probe,
+ .id_table = adxl367_i2c_id,
+};
+
+module_i2c_driver(adxl367_i2c_driver);
+
+MODULE_IMPORT_NS(ADXL367);
+MODULE_AUTHOR("Cosmin Tanislav <cosmin.tanislav@...log.com>");
+MODULE_DESCRIPTION("Analog Devices ADXL367 3-axis accelerometer I2C driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/adxl367_spi.c b/drivers/iio/accel/adxl367_spi.c
new file mode 100644
index 000000000000..072c76d4c921
--- /dev/null
+++ b/drivers/iio/accel/adxl367_spi.c
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2021 Analog Devices, Inc.
+ * Author: Cosmin Tanislav <cosmin.tanislav@...log.com>
+ */
+
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#include "adxl367.h"
+
+#define ADXL367_SPI_WRITE_COMMAND 0x0A
+#define ADXL367_SPI_READ_COMMAND 0x0B
+#define ADXL367_SPI_FIFO_COMMAND 0x0D
+
+struct adxl367_spi_state {
+ struct spi_device *spi;
+
+ struct spi_message reg_write_msg;
+ struct spi_transfer reg_write_xfer[2];
+
+ struct spi_message reg_read_msg;
+ struct spi_transfer reg_read_xfer[2];
+
+ struct spi_message fifo_msg;
+ struct spi_transfer fifo_xfer[2];
+
+ /*
+ * DMA (thus cache coherency maintenance) requires the
+ * transfer buffers to live in their own cache lines.
+ */
+ u8 reg_write_tx_buf[1] ____cacheline_aligned;
+ u8 reg_read_tx_buf[2];
+ u8 fifo_tx_buf[1];
+};
+
+static int adxl367_read_fifo(void *context, __be16 *fifo_buf,
+ unsigned int fifo_entries)
+{
+ struct adxl367_spi_state *st = context;
+
+ st->fifo_xfer[1].rx_buf = fifo_buf;
+ st->fifo_xfer[1].len = fifo_entries * sizeof(*fifo_buf);
+
+ return spi_sync(st->spi, &st->fifo_msg);
+}
+
+static int adxl367_read(void *context, const void *reg_buf, size_t reg_size,
+ void *val_buf, size_t val_size)
+{
+ struct adxl367_spi_state *st = context;
+ u8 reg = ((const u8 *)reg_buf)[0];
+
+ st->reg_read_tx_buf[1] = reg;
+ st->reg_read_xfer[1].rx_buf = val_buf;
+ st->reg_read_xfer[1].len = val_size;
+
+ return spi_sync(st->spi, &st->reg_read_msg);
+}
+
+static int adxl367_write(void *context, const void *val_buf, size_t val_size)
+{
+ struct adxl367_spi_state *st = context;
+
+ st->reg_write_xfer[1].tx_buf = val_buf;
+ st->reg_write_xfer[1].len = val_size;
+
+ return spi_sync(st->spi, &st->reg_write_msg);
+}
+
+static struct regmap_bus adxl367_spi_regmap_bus = {
+ .read = adxl367_read,
+ .write = adxl367_write,
+};
+
+static const struct regmap_config adxl367_spi_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static const struct adxl367_ops adxl367_spi_ops = {
+ .read_fifo = adxl367_read_fifo,
+};
+
+static int adxl367_spi_probe(struct spi_device *spi)
+{
+ struct adxl367_spi_state *st;
+ struct regmap *regmap;
+
+ st = devm_kzalloc(&spi->dev, sizeof(*st), GFP_KERNEL);
+ if (!st)
+ return -ENOMEM;
+
+ st->spi = spi;
+
+ /*
+ * Xfer: [XFR1] [ XFR2 ]
+ * Master: 0x0A ADDR DATA0 DATA1 ... DATAN
+ * Slave: .... ..........................
+ */
+ st->reg_write_tx_buf[0] = ADXL367_SPI_WRITE_COMMAND;
+ st->reg_write_xfer[0].tx_buf = st->reg_write_tx_buf;
+ st->reg_write_xfer[0].len = sizeof(st->reg_write_tx_buf);
+ spi_message_init_with_transfers(&st->reg_write_msg,
+ st->reg_write_xfer, 2);
+
+ /*
+ * Xfer: [ XFR1 ] [ XFR2 ]
+ * Master: 0x0B ADDR .....................
+ * Slave: ......... DATA0 DATA1 ... DATAN
+ */
+ st->reg_read_tx_buf[0] = ADXL367_SPI_READ_COMMAND;
+ st->reg_read_xfer[0].tx_buf = st->reg_read_tx_buf;
+ st->reg_read_xfer[0].len = sizeof(st->reg_read_tx_buf);
+ spi_message_init_with_transfers(&st->reg_read_msg,
+ st->reg_read_xfer, 2);
+
+ /*
+ * Xfer: [XFR1] [ XFR2 ]
+ * Master: 0x0D .....................
+ * Slave: .... DATA0 DATA1 ... DATAN
+ */
+ st->fifo_tx_buf[0] = ADXL367_SPI_FIFO_COMMAND;
+ st->fifo_xfer[0].tx_buf = st->fifo_tx_buf;
+ st->fifo_xfer[0].len = sizeof(st->fifo_tx_buf);
+ spi_message_init_with_transfers(&st->fifo_msg, st->fifo_xfer, 2);
+
+ regmap = devm_regmap_init(&spi->dev, &adxl367_spi_regmap_bus, st,
+ &adxl367_spi_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ return adxl367_probe(&spi->dev, &adxl367_spi_ops, st, regmap, spi->irq);
+}
+
+static const struct spi_device_id adxl367_spi_id[] = {
+ { "adxl367", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(spi, adxl367_spi_id);
+
+static const struct of_device_id adxl367_of_match[] = {
+ { .compatible = "adi,adxl367" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, adxl367_of_match);
+
+static struct spi_driver adxl367_spi_driver = {
+ .driver = {
+ .name = "adxl367_spi",
+ .of_match_table = adxl367_of_match,
+ },
+ .probe = adxl367_spi_probe,
+ .id_table = adxl367_spi_id,
+};
+
+module_spi_driver(adxl367_spi_driver);
+
+MODULE_IMPORT_NS(ADXL367);
+MODULE_AUTHOR("Cosmin Tanislav <cosmin.tanislav@...log.com>");
+MODULE_DESCRIPTION("Analog Devices ADXL367 3-axis accelerometer SPI driver");
+MODULE_LICENSE("GPL");
--
2.35.0
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