From: Lucas Stankus <lucas.p.stankus@gmail.com>
To: lars@metafoo.de, Michael.Hennerich@analog.com, jic23@kernel.org,
robh+dt@kernel.org, Dragos.Bogdan@analog.com,
Darius.Berghe@analog.com
Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 2/2] iio: accel: Add driver support for ADXL313
Date: Thu, 5 Aug 2021 03:29:59 -0300 [thread overview]
Message-ID: <22ad63af54e6cfc9486d44d05ba3d2f7482c7b1e.1628143857.git.lucas.p.stankus@gmail.com> (raw)
In-Reply-To: <cover.1628143857.git.lucas.p.stankus@gmail.com>
ADXL313 is a small, thin, low power, 3-axis accelerometer with high
resolution measurement up to +/-4g. It includes an integrated 32-level
FIFO and has activity and inactivity sensing capabilities.
Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL313.pdf
Signed-off-by: Lucas Stankus <lucas.p.stankus@gmail.com>
---
MAINTAINERS | 9 +
drivers/iio/accel/Kconfig | 29 +++
drivers/iio/accel/Makefile | 3 +
drivers/iio/accel/adxl313.h | 63 ++++++
drivers/iio/accel/adxl313_core.c | 321 +++++++++++++++++++++++++++++++
drivers/iio/accel/adxl313_i2c.c | 65 +++++++
drivers/iio/accel/adxl313_spi.c | 85 ++++++++
7 files changed, 575 insertions(+)
create mode 100644 drivers/iio/accel/adxl313.h
create mode 100644 drivers/iio/accel/adxl313_core.c
create mode 100644 drivers/iio/accel/adxl313_i2c.c
create mode 100644 drivers/iio/accel/adxl313_spi.c
diff --git a/MAINTAINERS b/MAINTAINERS
index a61f4f3b78a9..566055450b6b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -585,6 +585,15 @@ L: platform-driver-x86@vger.kernel.org
S: Maintained
F: drivers/platform/x86/adv_swbutton.c
+ADXL313 THREE-AXIS DIGITAL ACCELEROMETER DRIVER
+M: Lucas Stankus <lucas.p.stankus@gmail.com>
+S: Supported
+F: Documentation/devicetree/bindings/iio/accel/adi,adxl313.yaml
+F: drivers/iio/accel/adxl313.h
+F: drivers/iio/accel/adxl313_core.c
+F: drivers/iio/accel/adxl313_i2c.c
+F: drivers/iio/accel/adxl313_spi.c
+
ADXL34X THREE-AXIS DIGITAL ACCELEROMETER DRIVER (ADXL345/ADXL346)
M: Michael Hennerich <michael.hennerich@analog.com>
S: Supported
diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
index 0e56ace61103..ae621532e716 100644
--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -30,6 +30,35 @@ config ADIS16209
To compile this driver as a module, say M here: the module will be
called adis16209.
+config ADXL313
+ tristate
+
+config ADXL313_I2C
+ tristate "Analog Devices ADXL313 3-Axis Digital Accelerometer I2C Driver"
+ depends on I2C
+ select ADXL313
+ select REGMAP_I2C
+ help
+ Say Y here if you want to build i2c support for the Analog Devices
+ ADXL313 3-axis digital accelerometer.
+
+ To compile this driver as a module, choose M here: the module
+ will be called adxl313_i2c and you will also get adxl313_core
+ for the core module.
+
+config ADXL313_SPI
+ tristate "Analog Devices ADXL313 3-Axis Digital Accelerometer SPI Driver"
+ depends on SPI
+ select ADXL313
+ select REGMAP_SPI
+ help
+ Say Y here if you want to build spi support for the Analog Devices
+ ADXL313 3-axis digital accelerometer.
+
+ To compile this driver as a module, choose M here: the module
+ will be called adxl313_spi and you will also get adxl313_core
+ for the core module.
+
config ADXL345
tristate
diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile
index 89280e823bcd..fadc92816e24 100644
--- a/drivers/iio/accel/Makefile
+++ b/drivers/iio/accel/Makefile
@@ -6,6 +6,9 @@
# When adding new entries keep the list in alphabetical order
obj-$(CONFIG_ADIS16201) += adis16201.o
obj-$(CONFIG_ADIS16209) += adis16209.o
+obj-$(CONFIG_ADXL313) += adxl313_core.o
+obj-$(CONFIG_ADXL313_I2C) += adxl313_i2c.o
+obj-$(CONFIG_ADXL313_SPI) += adxl313_spi.o
obj-$(CONFIG_ADXL345) += adxl345_core.o
obj-$(CONFIG_ADXL345_I2C) += adxl345_i2c.o
obj-$(CONFIG_ADXL345_SPI) += adxl345_spi.o
diff --git a/drivers/iio/accel/adxl313.h b/drivers/iio/accel/adxl313.h
new file mode 100644
index 000000000000..ea5994227a2e
--- /dev/null
+++ b/drivers/iio/accel/adxl313.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * ADXL313 3-Axis Digital Accelerometer
+ *
+ * Copyright (c) 2021 Lucas Stankus <lucas.p.stankus@gmail.com>
+ */
+
+#ifndef _ADXL313_H_
+#define _ADXL313_H_
+
+/* ADXL313 register definitions */
+#define ADXL313_REG_DEVID0 0x00
+#define ADXL313_REG_DEVID1 0x01
+#define ADXL313_REG_PARTID 0x02
+#define ADXL313_REG_XID 0x04
+#define ADXL313_REG_SOFT_RESET 0x18
+#define ADXL313_REG_OFS_AXIS(index) (0x1E + (index))
+#define ADXL313_REG_THRESH_ACT 0x24
+#define ADXL313_REG_ACT_INACT_CTL 0x27
+#define ADXL313_REG_BW_RATE 0x2C
+#define ADXL313_REG_POWER_CTL 0x2D
+#define ADXL313_REG_INT_MAP 0x2F
+#define ADXL313_REG_DATA_FORMAT 0x31
+#define ADXL313_REG_DATAX 0x32
+#define ADXL313_REG_DATAY 0x34
+#define ADXL313_REG_DATAZ 0x36
+#define ADXL313_REG_FIFO_CTL 0x38
+#define ADXL313_REG_FIFO_STATUS 0x39
+
+#define ADXL313_DEVID0 0xAD
+#define ADXL313_DEVID1 0x1D
+#define ADXL313_PARTID 0xCB
+#define ADXL313_SOFT_RESET 0x52
+
+#define ADXL313_RATE_MSK GENMASK(3, 0)
+#define ADXL313_RATE_BASE 6
+
+#define ADXL313_POWER_CTL_MSK GENMASK(3, 2)
+#define ADXL313_MEASUREMENT_MODE BIT(3)
+
+#define ADXL313_RANGE_MSK GENMASK(1, 0)
+#define ADXL313_RANGE_4G 3
+
+#define ADXL313_FULL_RES BIT(3)
+#define ADXL313_SPI_3WIRE BIT(6)
+#define ADXL313_I2C_DISABLE BIT(6)
+
+/*
+ * Scale for any g range is given in datasheet as
+ * 1024 LSB/g = 0.0009765625 * 9.80665 = 0.009576806640625 m/s^2
+ */
+#define ADXL313_NSCALE 9576806
+
+extern const struct regmap_access_table adxl313_readable_regs_table;
+
+extern const struct regmap_access_table adxl313_writable_regs_table;
+
+int adxl313_core_probe(struct device *dev,
+ struct regmap *regmap,
+ const char *name,
+ int (*interface_specific_setup)(struct device *,
+ struct regmap *));
+#endif /* _ADXL313_H_ */
diff --git a/drivers/iio/accel/adxl313_core.c b/drivers/iio/accel/adxl313_core.c
new file mode 100644
index 000000000000..ed4484607556
--- /dev/null
+++ b/drivers/iio/accel/adxl313_core.c
@@ -0,0 +1,321 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ADXL313 3-Axis Digital Accelerometer
+ *
+ * Copyright (c) 2021 Lucas Stankus <lucas.p.stankus@gmail.com>
+ *
+ * Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL313.pdf
+ */
+
+#include <linux/bitfield.h>
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "adxl313.h"
+
+const struct regmap_range adxl313_readable_reg_range[] = {
+ regmap_reg_range(ADXL313_REG_DEVID0, ADXL313_REG_XID),
+ regmap_reg_range(ADXL313_REG_SOFT_RESET, ADXL313_REG_SOFT_RESET),
+ regmap_reg_range(ADXL313_REG_OFS_AXIS(0), ADXL313_REG_OFS_AXIS(2)),
+ regmap_reg_range(ADXL313_REG_THRESH_ACT, ADXL313_REG_ACT_INACT_CTL),
+ regmap_reg_range(ADXL313_REG_BW_RATE, ADXL313_REG_FIFO_STATUS)
+};
+
+const struct regmap_access_table adxl313_readable_regs_table = {
+ .yes_ranges = adxl313_readable_reg_range,
+ .n_yes_ranges = ARRAY_SIZE(adxl313_readable_reg_range)
+};
+EXPORT_SYMBOL_GPL(adxl313_readable_regs_table);
+
+const struct regmap_range adxl313_writable_reg_range[] = {
+ regmap_reg_range(ADXL313_REG_SOFT_RESET, ADXL313_REG_SOFT_RESET),
+ regmap_reg_range(ADXL313_REG_OFS_AXIS(0), ADXL313_REG_OFS_AXIS(2)),
+ regmap_reg_range(ADXL313_REG_THRESH_ACT, ADXL313_REG_ACT_INACT_CTL),
+ regmap_reg_range(ADXL313_REG_BW_RATE, ADXL313_REG_INT_MAP),
+ regmap_reg_range(ADXL313_REG_DATA_FORMAT, ADXL313_REG_DATA_FORMAT),
+ regmap_reg_range(ADXL313_REG_FIFO_CTL, ADXL313_REG_FIFO_CTL)
+};
+
+const struct regmap_access_table adxl313_writable_regs_table = {
+ .yes_ranges = adxl313_writable_reg_range,
+ .n_yes_ranges = ARRAY_SIZE(adxl313_writable_reg_range)
+};
+EXPORT_SYMBOL_GPL(adxl313_writable_regs_table);
+
+struct adxl313_data {
+ struct regmap *regmap;
+ struct mutex lock; /* lock to protect transf_buf */
+ __le16 transf_buf ____cacheline_aligned;
+};
+
+static const int adxl313_odr_freqs[][2] = {
+ [0] = { 6, 250000 },
+ [1] = { 12, 500000 },
+ [2] = { 25, 0 },
+ [3] = { 50, 0 },
+ [4] = { 100, 0 },
+ [5] = { 200, 0 },
+ [6] = { 400, 0 },
+ [7] = { 800, 0 },
+ [8] = { 1600, 0 },
+ [9] = { 3200, 0 },
+};
+
+#define ADXL313_ACCEL_CHANNEL(index, addr, axis) { \
+ .type = IIO_ACCEL, \
+ .address = addr, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_##axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_CALIBBIAS), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .info_mask_shared_by_type_available = \
+ BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_index = index, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 13, \
+ .storagebits = 16, \
+ .endianness = IIO_LE, \
+ }, \
+}
+
+static const struct iio_chan_spec adxl313_channels[] = {
+ ADXL313_ACCEL_CHANNEL(0, ADXL313_REG_DATAX, X),
+ ADXL313_ACCEL_CHANNEL(1, ADXL313_REG_DATAY, Y),
+ ADXL313_ACCEL_CHANNEL(2, ADXL313_REG_DATAZ, Z),
+};
+
+static int adxl313_set_odr(struct adxl313_data *data,
+ unsigned int freq1, unsigned int freq2)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(adxl313_odr_freqs); i++) {
+ if (adxl313_odr_freqs[i][0] == freq1 &&
+ adxl313_odr_freqs[i][1] == freq2)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(adxl313_odr_freqs))
+ return -EINVAL;
+
+ return regmap_update_bits(data->regmap, ADXL313_REG_BW_RATE,
+ ADXL313_RATE_MSK,
+ FIELD_PREP(ADXL313_RATE_MSK,
+ ADXL313_RATE_BASE + i));
+}
+
+static int adxl313_read_axis(struct adxl313_data *data,
+ struct iio_chan_spec const *chan)
+{
+ int ret;
+
+ mutex_lock(&data->lock);
+
+ ret = regmap_bulk_read(data->regmap,
+ chan->address,
+ &data->transf_buf, 2);
+ if (ret)
+ goto unlock_ret;
+
+ ret = le16_to_cpu(data->transf_buf);
+
+unlock_ret:
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
+static int adxl313_read_freq_avail(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ const int **vals, int *type, int *length,
+ long mask)
+{
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ *vals = (const int *)adxl313_odr_freqs;
+ *length = ARRAY_SIZE(adxl313_odr_freqs) * 2;
+ *type = IIO_VAL_INT_PLUS_MICRO;
+ return IIO_AVAIL_LIST;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int adxl313_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct adxl313_data *data = iio_priv(indio_dev);
+ unsigned int regval;
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = adxl313_read_axis(data, chan);
+ if (ret < 0)
+ return ret;
+
+ *val = sign_extend32(ret, chan->scan_type.realbits - 1);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ *val2 = ADXL313_NSCALE;
+ return IIO_VAL_INT_PLUS_NANO;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ ret = regmap_read(data->regmap,
+ ADXL313_REG_OFS_AXIS(chan->scan_index),
+ ®val);
+ if (ret)
+ return ret;
+
+ /*
+ * 8-bit resolution at +/- 0.5g, that is 4x accel data scale
+ * factor at full resolution
+ */
+ *val = sign_extend32(regval, 7) * 4;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret = regmap_read(data->regmap, ADXL313_REG_BW_RATE, ®val);
+ if (ret)
+ return ret;
+
+ ret = FIELD_GET(ADXL313_RATE_MSK, regval) - ADXL313_RATE_BASE;
+ *val = adxl313_odr_freqs[ret][0];
+ *val2 = adxl313_odr_freqs[ret][1];
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int adxl313_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct adxl313_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_CALIBBIAS:
+ /*
+ * 8-bit resolution at +/- 0.5g, that is 4x accel data scale
+ * factor at full resolution
+ */
+ if (val > 127 * 4 || val < -128 * 4)
+ return -EINVAL;
+
+ return regmap_write(data->regmap,
+ ADXL313_REG_OFS_AXIS(chan->scan_index),
+ val / 4);
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return adxl313_set_odr(data, val, val2);
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_info adxl313_info = {
+ .read_raw = adxl313_read_raw,
+ .write_raw = adxl313_write_raw,
+ .read_avail = adxl313_read_freq_avail
+};
+
+static int adxl313_setup(struct device *dev, struct adxl313_data *data,
+ int (*interface_specific_setup)(struct device *,
+ struct regmap *))
+{
+ unsigned int regval;
+ int ret;
+
+ ret = regmap_read(data->regmap, ADXL313_REG_DEVID0, ®val);
+ if (ret)
+ return ret;
+
+ if (interface_specific_setup) {
+ ret = interface_specific_setup(dev, data->regmap);
+ if (ret)
+ return ret;
+ }
+
+ if (regval != ADXL313_DEVID0) {
+ dev_err(dev, "Invalid manufacturer ID: 0x%02x\n", regval);
+ return -ENODEV;
+ }
+
+ ret = regmap_read(data->regmap, ADXL313_REG_DEVID1, ®val);
+ if (ret)
+ return ret;
+
+ if (regval != ADXL313_DEVID1) {
+ dev_err(dev, "Invalid mems ID: 0x%02x\n", regval);
+ return -ENODEV;
+ }
+
+ ret = regmap_read(data->regmap, ADXL313_REG_PARTID, ®val);
+ if (ret)
+ return ret;
+
+ if (regval != ADXL313_PARTID) {
+ dev_err(dev, "Invalid device ID: 0x%02x\n", regval);
+ return -ENODEV;
+ }
+
+ /* Sets the range to +/- 4g */
+ ret = regmap_update_bits(data->regmap, ADXL313_REG_DATA_FORMAT,
+ ADXL313_RANGE_MSK,
+ FIELD_PREP(ADXL313_RANGE_MSK,
+ ADXL313_RANGE_4G));
+ if (ret)
+ return ret;
+
+ /* Enables full resolution */
+ ret = regmap_update_bits(data->regmap, ADXL313_REG_DATA_FORMAT,
+ ADXL313_FULL_RES, ADXL313_FULL_RES);
+ if (ret)
+ return ret;
+
+ /* Enables measurement mode */
+ return regmap_update_bits(data->regmap, ADXL313_REG_POWER_CTL,
+ ADXL313_POWER_CTL_MSK,
+ ADXL313_MEASUREMENT_MODE);
+}
+
+int adxl313_core_probe(struct device *dev,
+ struct regmap *regmap,
+ const char *name,
+ int (*interface_specific_setup)(struct device *,
+ struct regmap *))
+{
+ struct adxl313_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ data->regmap = regmap;
+ mutex_init(&data->lock);
+
+ indio_dev->name = name;
+ indio_dev->info = &adxl313_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = adxl313_channels;
+ indio_dev->num_channels = ARRAY_SIZE(adxl313_channels);
+
+ ret = adxl313_setup(dev, data, interface_specific_setup);
+ if (ret) {
+ dev_err(dev, "ADXL313 setup failed\n");
+ return ret;
+ }
+
+ return devm_iio_device_register(dev, indio_dev);
+}
+EXPORT_SYMBOL_GPL(adxl313_core_probe);
+
+MODULE_AUTHOR("Lucas Stankus <lucas.p.stankus@gmail.com>");
+MODULE_DESCRIPTION("ADXL313 3-Axis Digital Accelerometer core driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/adxl313_i2c.c b/drivers/iio/accel/adxl313_i2c.c
new file mode 100644
index 000000000000..d60e757cae07
--- /dev/null
+++ b/drivers/iio/accel/adxl313_i2c.c
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ADXL313 3-Axis Digital Accelerometer
+ *
+ * Copyright (c) 2021 Lucas Stankus <lucas.p.stankus@gmail.com>
+ *
+ * Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL313.pdf
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "adxl313.h"
+
+static const struct regmap_config adxl313_i2c_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .rd_table = &adxl313_readable_regs_table,
+ .wr_table = &adxl313_writable_regs_table,
+ .max_register = 0x39
+};
+
+static int adxl313_i2c_probe(struct i2c_client *client)
+{
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_i2c(client, &adxl313_i2c_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&client->dev, "Error initializing i2c regmap: %ld\n",
+ PTR_ERR(regmap));
+ return PTR_ERR(regmap);
+ }
+
+ return adxl313_core_probe(&client->dev, regmap, client->name, NULL);
+}
+
+static const struct i2c_device_id adxl313_i2c_id[] = {
+ { "adxl313" },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, adxl313_i2c_id);
+
+static const struct of_device_id adxl313_of_match[] = {
+ { .compatible = "adi,adxl313" },
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, adxl313_of_match);
+
+static struct i2c_driver adxl313_i2c_driver = {
+ .driver = {
+ .name = "adxl313_i2c",
+ .of_match_table = adxl313_of_match,
+ },
+ .probe_new = adxl313_i2c_probe,
+ .id_table = adxl313_i2c_id
+};
+
+module_i2c_driver(adxl313_i2c_driver);
+
+MODULE_AUTHOR("Lucas Stankus <lucas.p.stankus@gmail.com>");
+MODULE_DESCRIPTION("ADXL313 3-Axis Digital Accelerometer I2C driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/adxl313_spi.c b/drivers/iio/accel/adxl313_spi.c
new file mode 100644
index 000000000000..b5804522d9ff
--- /dev/null
+++ b/drivers/iio/accel/adxl313_spi.c
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ADXL313 3-Axis Digital Accelerometer
+ *
+ * Copyright (c) 2021 Lucas Stankus <lucas.p.stankus@gmail.com>
+ *
+ * Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL313.pdf
+ */
+
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#include "adxl313.h"
+
+static const struct regmap_config adxl313_spi_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .rd_table = &adxl313_readable_regs_table,
+ .wr_table = &adxl313_writable_regs_table,
+ .max_register = 0x39,
+ /* Setting bits 7 and 6 enables multiple-byte read */
+ .read_flag_mask = BIT(7) | BIT(6)
+};
+
+static int adxl313_spi_setup(struct device *dev, struct regmap *regmap)
+{
+ struct spi_device *spi = container_of(dev, struct spi_device, dev);
+ int ret;
+
+ if (spi->mode & SPI_3WIRE) {
+ ret = regmap_write(regmap, ADXL313_REG_DATA_FORMAT,
+ ADXL313_SPI_3WIRE);
+ if (ret)
+ return ret;
+ }
+
+ return regmap_update_bits(regmap, ADXL313_REG_POWER_CTL,
+ ADXL313_I2C_DISABLE, ADXL313_I2C_DISABLE);
+}
+
+static int adxl313_spi_probe(struct spi_device *spi)
+{
+ const struct spi_device_id *id = spi_get_device_id(spi);
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_spi(spi, &adxl313_spi_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&spi->dev, "Error initializing spi regmap: %ld\n",
+ PTR_ERR(regmap));
+ return PTR_ERR(regmap);
+ }
+
+ return adxl313_core_probe(&spi->dev, regmap, id->name,
+ &adxl313_spi_setup);
+}
+
+static const struct spi_device_id adxl313_spi_id[] = {
+ { "adxl313" },
+ { }
+};
+
+MODULE_DEVICE_TABLE(spi, adxl313_spi_id);
+
+static const struct of_device_id adxl313_of_match[] = {
+ { .compatible = "adi,adxl313" },
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, adxl313_of_match);
+
+static struct spi_driver adxl313_spi_driver = {
+ .driver = {
+ .name = "adxl313_spi",
+ .of_match_table = adxl313_of_match,
+ },
+ .probe = adxl313_spi_probe,
+ .id_table = adxl313_spi_id
+};
+
+module_spi_driver(adxl313_spi_driver);
+
+MODULE_AUTHOR("Lucas Stankus <lucas.p.stankus@gmail.com>");
+MODULE_DESCRIPTION("ADXL313 3-Axis Digital Accelerometer SPI driver");
+MODULE_LICENSE("GPL v2");
--
2.32.0
next prev parent reply other threads:[~2021-08-05 6:30 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-05 6:29 [PATCH v2 0/2] iio: accel: Add support for ADXL313 accelerometer Lucas Stankus
2021-08-05 6:29 ` [PATCH v2 1/2] dt-bindings: iio: accel: Add binding documentation for ADXL313 Lucas Stankus
2021-08-06 17:07 ` Rob Herring
2021-08-06 18:10 ` Rob Herring
2021-08-07 0:33 ` Lucas Stankus
2021-08-08 14:45 ` Jonathan Cameron
2021-08-05 6:29 ` Lucas Stankus [this message]
2021-08-05 8:21 ` [PATCH v2 2/2] iio: accel: Add driver support " Alexandru Ardelean
[not found] ` <CAHp75Ve7avWpdnCioW6qdT21NqjK1TTW-nwFsz6x+0JLXsQH3Q@mail.gmail.com>
2021-08-07 0:22 ` Lucas Stankus
2021-08-08 14:51 ` Jonathan Cameron
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