* [PATCH v7 1/2] dt-bindings: iio: accel: Add bmi088 accelerometer bindings
@ 2021-01-21 15:56 Mike Looijmans
2021-01-21 15:56 ` [PATCH v7 2/2] iio: accel: Add support for the Bosch-Sensortec BMI088 Mike Looijmans
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Mike Looijmans @ 2021-01-21 15:56 UTC (permalink / raw)
To: linux-iio
Cc: Mike Looijmans, Jonathan Cameron, Lars-Peter Clausen,
Peter Meerwald-Stadler, Rob Herring, devicetree, linux-kernel
This adds the device-tree bindings for the Bosch Sensortec BMI088 IMU,
the accelerometer part.
Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
---
Changes in v7:
Add additionalProperties
Change bmi088_accel to bmi088-accel
Add interrupt-names and adjust description
Changes in v6:
I't been almost a year since the last commit, sorry...
Fixed the yaml errors
Add interrupt, vdd and vddio properties
Changes in v5:
submit together with driver code as patch series
Changes in v2:
convert to yaml format
.../bindings/iio/accel/bosch,bmi088.yaml | 66 +++++++++++++++++++
1 file changed, 66 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml
diff --git a/Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml b/Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml
new file mode 100644
index 000000000000..db5dbaf80fa2
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/accel/bosch,bmi088.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Bosch BMI088 IMU accelerometer part
+
+maintainers:
+ - Mike Looijmans <mike.looijmans@topic.nl>
+
+description: |
+ Acceleration part of the IMU sensor with an SPI interface
+ Specifications about the sensor can be found at:
+ https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmi088-ds001.pdf
+
+properties:
+ compatible:
+ enum:
+ - bosch,bmi088-accel
+
+ reg:
+ maxItems: 1
+
+ vdd-supply: true
+
+ vddio-supply: true
+
+ interrupts:
+ minItems: 1
+ maxItems: 2
+ description: |
+ Type should be either IRQ_TYPE_LEVEL_HIGH or IRQ_TYPE_LEVEL_LOW.
+ Two configurable interrupt lines exist.
+
+ interrupt-names:
+ description: Specify which interrupt line is in use.
+ items:
+ enum:
+ - INT1
+ - INT2
+ minItems: 1
+ maxItems: 2
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ bmi088-accel@1 {
+ compatible = "bosch,bmi088-accel";
+ reg = <1>;
+ spi-max-frequency = <10000000>;
+ interrupt-parent = <&gpio6>;
+ interrupts = <19 IRQ_TYPE_LEVEL_LOW>;
+ interrupt-names = "INT2";
+ };
+ };
+...
--
2.17.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH v7 2/2] iio: accel: Add support for the Bosch-Sensortec BMI088
2021-01-21 15:56 [PATCH v7 1/2] dt-bindings: iio: accel: Add bmi088 accelerometer bindings Mike Looijmans
@ 2021-01-21 15:56 ` Mike Looijmans
2021-01-23 15:49 ` Jonathan Cameron
2021-01-22 14:00 ` [PATCH v7 1/2] dt-bindings: iio: accel: Add bmi088 accelerometer bindings Rob Herring
2021-01-23 15:38 ` Jonathan Cameron
2 siblings, 1 reply; 6+ messages in thread
From: Mike Looijmans @ 2021-01-21 15:56 UTC (permalink / raw)
To: linux-iio
Cc: Mike Looijmans, Dan Robertson, Gaëtan André,
Jonathan Bakker, Jonathan Cameron, Lars-Peter Clausen,
Linus Walleij, Peter Meerwald-Stadler, linux-kernel
The BMI088 is a combined module with both accelerometer and gyroscope.
This adds the accelerometer driver support for the SPI interface.
The gyroscope part is already supported by the BMG160 driver.
Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
---
Changes in v7:
Change bmi088_accel to bmi088-accel
Order includes alphabetically
Suspend and disable on remove
Make bmi088_regmap_spi_{read|write} static
Changes in v6:
Hope you have good memory - v5 was almost a year ago now
Remove superfluous *val=0
Make sample_frequency selection into read_avail list
Changes in v5:
Add includes and forward defines in header
BIT(7) instead of 0x80
Reset already sets defaults, do not set them again
Remove now unused bmi088_accel_set_bw
Remove unused AXIS_MAX
Use MASK define for ODR setting
Explain buffer use and alignment
Split bmi088_accel_set_power_state into "on" and "off" parts
Cosmetic changes to improve readability
Changes in v4:
Remove unused #include directives
Remove unused #defines for event and irq
Replace (ret < 0) with (ret) for all regmap calls
Consistent checking of IO errors in probe and init
Removed #ifdef CONFIG_PM guard
Use bitops for set_frequency instead of loop with shift
s/__s16/s16/g
Remove excess blank lines
Don't return -EAGAIN in pm_runtime
Changes in v3:
Processed comments from Jonathan Cameron and Lars-Peter Clausen
implement runtime PM (tested by code tracing) and sleep
fix scale and offset factors for accel and temperature and
return raw values instead of pre-scaled ones
Use iio_device_{claim,release}_direct_mode
Remove unused code and structs
Use a cache-aligned buffer for bulk read
Configure and enable caching register values
Changes in v2:
Remove unused typedefs and variables
Fix error return when iio_device_register fails
drivers/iio/accel/Kconfig | 18 +
drivers/iio/accel/Makefile | 2 +
drivers/iio/accel/bmi088-accel-core.c | 632 ++++++++++++++++++++++++++
drivers/iio/accel/bmi088-accel-spi.c | 83 ++++
drivers/iio/accel/bmi088-accel.h | 18 +
5 files changed, 753 insertions(+)
create mode 100644 drivers/iio/accel/bmi088-accel-core.c
create mode 100644 drivers/iio/accel/bmi088-accel-spi.c
create mode 100644 drivers/iio/accel/bmi088-accel.h
diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
index 2e0c62c39155..cceda3cecbcf 100644
--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -157,6 +157,24 @@ config BMC150_ACCEL_SPI
tristate
select REGMAP_SPI
+config BMI088_ACCEL
+ tristate "Bosch BMI088 Accelerometer Driver"
+ depends on SPI
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select REGMAP
+ select BMI088_ACCEL_SPI
+ help
+ Say yes here to build support for the Bosch BMI088 accelerometer.
+
+ This is a combo module with both accelerometer and gyroscope. This
+ driver only implements the accelerometer part, which has its own
+ address and register map. BMG160 provides the gyroscope driver.
+
+config BMI088_ACCEL_SPI
+ tristate
+ select REGMAP_SPI
+
config DA280
tristate "MiraMEMS DA280 3-axis 14-bit digital accelerometer driver"
depends on I2C
diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile
index 4f6c1ebe13b0..32cd1342a31a 100644
--- a/drivers/iio/accel/Makefile
+++ b/drivers/iio/accel/Makefile
@@ -20,6 +20,8 @@ obj-$(CONFIG_BMA400_SPI) += bma400_spi.o
obj-$(CONFIG_BMC150_ACCEL) += bmc150-accel-core.o
obj-$(CONFIG_BMC150_ACCEL_I2C) += bmc150-accel-i2c.o
obj-$(CONFIG_BMC150_ACCEL_SPI) += bmc150-accel-spi.o
+obj-$(CONFIG_BMI088_ACCEL) += bmi088-accel-core.o
+obj-$(CONFIG_BMI088_ACCEL_SPI) += bmi088-accel-spi.o
obj-$(CONFIG_DA280) += da280.o
obj-$(CONFIG_DA311) += da311.o
obj-$(CONFIG_DMARD06) += dmard06.o
diff --git a/drivers/iio/accel/bmi088-accel-core.c b/drivers/iio/accel/bmi088-accel-core.c
new file mode 100644
index 000000000000..d7dc6f3e2fa6
--- /dev/null
+++ b/drivers/iio/accel/bmi088-accel-core.c
@@ -0,0 +1,632 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 3-axis accelerometer driver supporting following Bosch-Sensortec chips:
+ * - BMI088
+ *
+ * Copyright (c) 2018-2021, Topic Embedded Products
+ */
+
+#include <asm/unaligned.h>
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#include "bmi088-accel.h"
+
+#define BMI088_ACCEL_REG_CHIP_ID 0x00
+#define BMI088_ACCEL_REG_ERROR 0x02
+
+#define BMI088_ACCEL_REG_INT_STATUS 0x1D
+#define BMI088_ACCEL_INT_STATUS_BIT_DRDY BIT(7)
+
+#define BMI088_ACCEL_REG_RESET 0x7E
+#define BMI088_ACCEL_RESET_VAL 0xB6
+
+#define BMI088_ACCEL_REG_PWR_CTRL 0x7D
+#define BMI088_ACCEL_REG_PWR_CONF 0x7C
+
+#define BMI088_ACCEL_REG_INT_MAP_DATA 0x58
+#define BMI088_ACCEL_INT_MAP_DATA_BIT_INT1_DRDY BIT(2)
+#define BMI088_ACCEL_INT_MAP_DATA_BIT_INT2_FWM BIT(5)
+
+#define BMI088_ACCEL_REG_INT1_IO_CONF 0x53
+#define BMI088_ACCEL_INT1_IO_CONF_BIT_ENABLE_OUT BIT(3)
+#define BMI088_ACCEL_INT1_IO_CONF_BIT_LVL BIT(1)
+
+#define BMI088_ACCEL_REG_INT2_IO_CONF 0x54
+#define BMI088_ACCEL_INT2_IO_CONF_BIT_ENABLE_OUT BIT(3)
+#define BMI088_ACCEL_INT2_IO_CONF_BIT_LVL BIT(1)
+
+#define BMI088_ACCEL_REG_ACC_CONF 0x40
+#define BMI088_ACCEL_MODE_ODR_MASK 0x0f
+
+#define BMI088_ACCEL_REG_ACC_RANGE 0x41
+#define BMI088_ACCEL_RANGE_3G 0x00
+#define BMI088_ACCEL_RANGE_6G 0x01
+#define BMI088_ACCEL_RANGE_12G 0x02
+#define BMI088_ACCEL_RANGE_24G 0x03
+
+#define BMI088_ACCEL_REG_TEMP 0x22
+#define BMI088_ACCEL_REG_TEMP_SHIFT 5
+#define BMI088_ACCEL_TEMP_UNIT 125
+#define BMI088_ACCEL_TEMP_OFFSET 23000
+
+#define BMI088_ACCEL_REG_XOUT_L 0x12
+#define BMI088_ACCEL_AXIS_TO_REG(axis) \
+ (BMI088_ACCEL_REG_XOUT_L + (axis * 2))
+
+#define BMI088_ACCEL_MAX_STARTUP_TIME_US 1000
+#define BMI088_AUTO_SUSPEND_DELAY_MS 2000
+
+#define BMI088_ACCEL_REG_FIFO_STATUS 0x0E
+#define BMI088_ACCEL_REG_FIFO_CONFIG0 0x48
+#define BMI088_ACCEL_REG_FIFO_CONFIG1 0x49
+#define BMI088_ACCEL_REG_FIFO_DATA 0x3F
+#define BMI088_ACCEL_FIFO_LENGTH 100
+
+#define BMI088_ACCEL_FIFO_MODE_FIFO 0x40
+#define BMI088_ACCEL_FIFO_MODE_STREAM 0x80
+
+enum bmi088_accel_axis {
+ AXIS_X,
+ AXIS_Y,
+ AXIS_Z,
+};
+
+enum bmi088_power_modes {
+ BMI088_ACCEL_MODE_ACTIVE,
+ BMI088_ACCEL_MODE_SUSPEND,
+};
+
+static const int bmi088_sample_freqs[] = {
+ 12, 500000,
+ 25, 0,
+ 50, 0,
+ 100, 0,
+ 200, 0,
+ 400, 0,
+ 800, 0,
+ 1600, 0,
+};
+
+/* Available OSR (over sampling rate) sets the 3dB cut-off frequency */
+enum bmi088_osr_modes {
+ BMI088_ACCEL_MODE_OSR_NORMAL = 0xA,
+ BMI088_ACCEL_MODE_OSR_2 = 0x9,
+ BMI088_ACCEL_MODE_OSR_4 = 0x8,
+};
+
+/* Available ODR (output data rates) in Hz */
+enum bmi088_odr_modes {
+ BMI088_ACCEL_MODE_ODR_12_5 = 0x5,
+ BMI088_ACCEL_MODE_ODR_25 = 0x6,
+ BMI088_ACCEL_MODE_ODR_50 = 0x7,
+ BMI088_ACCEL_MODE_ODR_100 = 0x8,
+ BMI088_ACCEL_MODE_ODR_200 = 0x9,
+ BMI088_ACCEL_MODE_ODR_400 = 0xa,
+ BMI088_ACCEL_MODE_ODR_800 = 0xb,
+ BMI088_ACCEL_MODE_ODR_1600 = 0xc,
+};
+
+struct bmi088_scale_info {
+ int scale;
+ u8 reg_range;
+};
+
+struct bmi088_accel_chip_info {
+ const char *name;
+ u8 chip_id;
+ const struct iio_chan_spec *channels;
+ int num_channels;
+};
+
+struct bmi088_accel_data {
+ struct regmap *regmap;
+ struct mutex mutex;
+ const struct bmi088_accel_chip_info *chip_info;
+ u8 buffer[2] ____cacheline_aligned; /* shared DMA safe buffer */
+};
+
+static const struct regmap_range bmi088_volatile_ranges[] = {
+ /* All registers below 0x40 are volatile, except the CHIP ID. */
+ regmap_reg_range(BMI088_ACCEL_REG_ERROR, 0x3f),
+ /* Mark the RESET as volatile too, it is self-clearing */
+ regmap_reg_range(BMI088_ACCEL_REG_RESET, BMI088_ACCEL_REG_RESET),
+};
+
+static const struct regmap_access_table bmi088_volatile_table = {
+ .yes_ranges = bmi088_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(bmi088_volatile_ranges),
+};
+
+const struct regmap_config bmi088_regmap_conf = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0x7E,
+ .volatile_table = &bmi088_volatile_table,
+ .cache_type = REGCACHE_RBTREE,
+};
+EXPORT_SYMBOL_GPL(bmi088_regmap_conf);
+
+static int bmi088_accel_set_power_state_on(struct bmi088_accel_data *data)
+{
+ struct device *dev = regmap_get_device(data->regmap);
+ int ret;
+
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(dev);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int bmi088_accel_set_power_state_off(struct bmi088_accel_data *data)
+{
+ struct device *dev = regmap_get_device(data->regmap);
+ int ret;
+
+ pm_runtime_mark_last_busy(dev);
+ ret = pm_runtime_put_autosuspend(dev);
+
+ return ret < 0 ? ret : 0;
+}
+
+/*
+ * The register ACC_PWR_CTRL enables and disables the accelerometer and the
+ * temperature sensor.
+ */
+static int bmi088_accel_enable(struct bmi088_accel_data *data, bool on_off)
+{
+ struct device *dev = regmap_get_device(data->regmap);
+ unsigned int val = on_off ? 0x4 : 0x0;
+ int ret;
+
+ ret = regmap_write(data->regmap, BMI088_ACCEL_REG_PWR_CTRL, val);
+ if (ret) {
+ dev_err(dev, "Error writing ACC_PWR_CTRL reg\n");
+ return ret;
+ }
+ /* Datasheet recommends to wait at least 5ms before communication */
+ usleep_range(5000, 6000);
+
+ return 0;
+}
+
+/* In suspend mode, only the accelerometer is powered down. */
+static int bmi088_accel_set_mode(struct bmi088_accel_data *data,
+ enum bmi088_power_modes mode)
+{
+ struct device *dev = regmap_get_device(data->regmap);
+ unsigned int val = mode == BMI088_ACCEL_MODE_SUSPEND ? 0x3 : 0x0;
+ int ret;
+
+ ret = regmap_write(data->regmap, BMI088_ACCEL_REG_PWR_CONF, val);
+ if (ret) {
+ dev_err(dev, "Error writing ACCEL_PWR_CONF reg\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int bmi088_accel_get_sample_freq(struct bmi088_accel_data *data,
+ int *val, int *val2)
+{
+ unsigned int value;
+ int ret;
+
+ ret = regmap_read(data->regmap, BMI088_ACCEL_REG_ACC_CONF,
+ &value);
+ if (ret)
+ return ret;
+
+ value &= BMI088_ACCEL_MODE_ODR_MASK;
+ value -= BMI088_ACCEL_MODE_ODR_12_5;
+ value <<= 1;
+
+ if (value >= ARRAY_SIZE(bmi088_sample_freqs) - 1)
+ return -EINVAL;
+
+ *val = bmi088_sample_freqs[value];
+ *val2 = bmi088_sample_freqs[value + 1];
+
+ return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static int bmi088_accel_set_sample_freq(struct bmi088_accel_data *data, int val)
+{
+ unsigned int regval;
+ int index = 0;
+
+ while (index < ARRAY_SIZE(bmi088_sample_freqs) &&
+ bmi088_sample_freqs[index] != val)
+ index += 2;
+
+ if (index >= ARRAY_SIZE(bmi088_sample_freqs))
+ return -EINVAL;
+
+ regval = (index >> 1) + BMI088_ACCEL_MODE_ODR_12_5;
+
+ return regmap_update_bits(data->regmap, BMI088_ACCEL_REG_ACC_CONF,
+ BMI088_ACCEL_MODE_ODR_MASK, regval);
+}
+
+static int bmi088_accel_get_temp(struct bmi088_accel_data *data, int *val)
+{
+ int ret;
+ s16 temp;
+
+ mutex_lock(&data->mutex);
+
+ ret = regmap_bulk_read(data->regmap, BMI088_ACCEL_REG_TEMP,
+ &data->buffer, sizeof(__be16));
+ /* data->buffer is cacheline aligned */
+ temp = be16_to_cpu(*(__be16 *)data->buffer);
+
+ mutex_unlock(&data->mutex);
+
+ if (ret)
+ return ret;
+
+ *val = temp >> BMI088_ACCEL_REG_TEMP_SHIFT;
+
+ return IIO_VAL_INT;
+}
+
+static int bmi088_accel_get_axis(struct bmi088_accel_data *data,
+ struct iio_chan_spec const *chan,
+ int *val)
+{
+ int ret;
+ s16 raw_val;
+
+ mutex_lock(&data->mutex);
+
+ ret = bmi088_accel_set_power_state_on(data);
+ if (ret)
+ return ret;
+
+ ret = regmap_bulk_read(data->regmap,
+ BMI088_ACCEL_AXIS_TO_REG(chan->scan_index),
+ data->buffer, sizeof(__le16));
+ raw_val = le16_to_cpu(*(__le16 *)data->buffer);
+
+ bmi088_accel_set_power_state_off(data);
+
+ mutex_unlock(&data->mutex);
+
+ if (ret)
+ return ret;
+
+ *val = raw_val;
+
+ return IIO_VAL_INT;
+}
+
+static int bmi088_accel_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct bmi088_accel_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_TEMP:
+ return bmi088_accel_get_temp(data, val);
+ case IIO_ACCEL:
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ ret = bmi088_accel_get_axis(data, chan, val);
+ iio_device_release_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_OFFSET:
+ switch (chan->type) {
+ case IIO_TEMP:
+ /* Offset applies before scale */
+ *val = BMI088_ACCEL_TEMP_OFFSET/BMI088_ACCEL_TEMP_UNIT;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_TEMP:
+ /* 0.125 degrees per LSB */
+ *val = BMI088_ACCEL_TEMP_UNIT;
+ return IIO_VAL_INT;
+ case IIO_ACCEL:
+ ret = regmap_read(data->regmap,
+ BMI088_ACCEL_REG_ACC_RANGE, val);
+ if (ret)
+ return ret;
+
+ *val2 = 15 - (*val & 0x3);
+ *val = 3 * 980;
+
+ return IIO_VAL_FRACTIONAL_LOG2;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ mutex_lock(&data->mutex);
+ ret = bmi088_accel_get_sample_freq(data, val, val2);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int bmi088_accel_read_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:
+ *type = IIO_VAL_INT_PLUS_MICRO;
+ *vals = bmi088_sample_freqs;
+ *length = ARRAY_SIZE(bmi088_sample_freqs);
+ return IIO_AVAIL_LIST;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int bmi088_accel_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct bmi088_accel_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ mutex_lock(&data->mutex);
+ ret = bmi088_accel_set_sample_freq(data, val);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+}
+
+#define BMI088_ACCEL_CHANNEL(_axis) { \
+ .type = IIO_ACCEL, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_##_axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .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 = AXIS_##_axis, \
+}
+
+static const struct iio_chan_spec bmi088_accel_channels[] = {
+ {
+ .type = IIO_TEMP,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_OFFSET),
+ .scan_index = -1,
+ },
+ BMI088_ACCEL_CHANNEL(X),
+ BMI088_ACCEL_CHANNEL(Y),
+ BMI088_ACCEL_CHANNEL(Z),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const struct bmi088_accel_chip_info bmi088_accel_chip_info_tbl[] = {
+ [0] = {
+ .name = "bmi088a",
+ .chip_id = 0x1E,
+ .channels = bmi088_accel_channels,
+ .num_channels = ARRAY_SIZE(bmi088_accel_channels),
+ },
+};
+
+static const struct iio_info bmi088_accel_info = {
+ .read_raw = bmi088_accel_read_raw,
+ .write_raw = bmi088_accel_write_raw,
+ .read_avail = bmi088_accel_read_avail,
+};
+
+static const unsigned long bmi088_accel_scan_masks[] = {
+ BIT(AXIS_X) | BIT(AXIS_Y) | BIT(AXIS_Z),
+ 0
+};
+
+static int bmi088_accel_chip_init(struct bmi088_accel_data *data)
+{
+ struct device *dev = regmap_get_device(data->regmap);
+ int ret, i;
+ unsigned int val;
+
+ /* Do a dummy read to enable SPI interface, won't harm I2C */
+ regmap_read(data->regmap, BMI088_ACCEL_REG_INT_STATUS, &val);
+
+ /*
+ * Reset chip to get it in a known good state. A delay of 1ms after
+ * reset is required according to the data sheet
+ */
+ ret = regmap_write(data->regmap, BMI088_ACCEL_REG_RESET,
+ BMI088_ACCEL_RESET_VAL);
+ if (ret)
+ return ret;
+
+ usleep_range(1000, 2000);
+
+ /* Do a dummy read again after a reset to enable the SPI interface */
+ regmap_read(data->regmap, BMI088_ACCEL_REG_INT_STATUS, &val);
+
+ /* Read chip ID */
+ ret = regmap_read(data->regmap, BMI088_ACCEL_REG_CHIP_ID, &val);
+ if (ret) {
+ dev_err(dev, "Error: Reading chip id\n");
+ return ret;
+ }
+
+ /* Validate chip ID */
+ for (i = 0; i < ARRAY_SIZE(bmi088_accel_chip_info_tbl); i++) {
+ if (bmi088_accel_chip_info_tbl[i].chip_id == val) {
+ data->chip_info = &bmi088_accel_chip_info_tbl[i];
+ break;
+ }
+ }
+ if (i == ARRAY_SIZE(bmi088_accel_chip_info_tbl)) {
+ dev_err(dev, "Invalid chip %x\n", val);
+ return -ENODEV;
+ }
+
+ /* Enable accelerometer after reset */
+ return bmi088_accel_enable(data, true);
+}
+
+int bmi088_accel_core_probe(struct device *dev, struct regmap *regmap,
+ int irq, const char *name, bool block_supported)
+{
+ struct bmi088_accel_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);
+ dev_set_drvdata(dev, indio_dev);
+
+ data->regmap = regmap;
+
+ ret = bmi088_accel_chip_init(data);
+ if (ret)
+ return ret;
+
+ mutex_init(&data->mutex);
+
+ indio_dev->dev.parent = dev;
+ indio_dev->channels = data->chip_info->channels;
+ indio_dev->num_channels = data->chip_info->num_channels;
+ indio_dev->name = name ? name : data->chip_info->name;
+ indio_dev->available_scan_masks = bmi088_accel_scan_masks;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &bmi088_accel_info;
+
+ ret = pm_runtime_set_active(dev);
+ if (ret)
+ return ret;
+
+ pm_runtime_enable(dev);
+ pm_runtime_set_autosuspend_delay(dev, BMI088_AUTO_SUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(dev);
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ dev_err(dev, "Unable to register iio device\n");
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(bmi088_accel_core_probe);
+
+static void bmi088_accel_suspend_impl(struct bmi088_accel_data *data)
+{
+ mutex_lock(&data->mutex);
+ bmi088_accel_set_mode(data, BMI088_ACCEL_MODE_SUSPEND);
+ bmi088_accel_enable(data, false);
+ mutex_unlock(&data->mutex);
+}
+
+int bmi088_accel_core_remove(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct bmi088_accel_data *data = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+
+ pm_runtime_disable(dev);
+ pm_runtime_set_suspended(dev);
+ pm_runtime_put_noidle(dev);
+ bmi088_accel_suspend_impl(data);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(bmi088_accel_core_remove);
+
+/* When going into system sleep, put the chip in power down */
+static int __maybe_unused bmi088_accel_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct bmi088_accel_data *data = iio_priv(indio_dev);
+
+ bmi088_accel_suspend_impl(data);
+
+ return 0;
+}
+
+static int __maybe_unused bmi088_accel_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct bmi088_accel_data *data = iio_priv(indio_dev);
+
+ mutex_lock(&data->mutex);
+ bmi088_accel_enable(data, true);
+ bmi088_accel_set_mode(data, BMI088_ACCEL_MODE_ACTIVE);
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+/* For runtime PM put the chip in suspend mode */
+static int __maybe_unused bmi088_accel_runtime_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct bmi088_accel_data *data = iio_priv(indio_dev);
+
+ return bmi088_accel_set_mode(data, BMI088_ACCEL_MODE_SUSPEND);
+}
+
+static int __maybe_unused bmi088_accel_runtime_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct bmi088_accel_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = bmi088_accel_set_mode(data, BMI088_ACCEL_MODE_ACTIVE);
+ if (ret)
+ return ret;
+
+ usleep_range(BMI088_ACCEL_MAX_STARTUP_TIME_US,
+ BMI088_ACCEL_MAX_STARTUP_TIME_US * 2);
+
+ return 0;
+}
+
+const struct dev_pm_ops bmi088_accel_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(bmi088_accel_suspend, bmi088_accel_resume)
+ SET_RUNTIME_PM_OPS(bmi088_accel_runtime_suspend,
+ bmi088_accel_runtime_resume, NULL)
+};
+EXPORT_SYMBOL_GPL(bmi088_accel_pm_ops);
+
+MODULE_AUTHOR("Niek van Agt <niek.van.agt@topicproducts.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("BMI088 accelerometer driver (core)");
diff --git a/drivers/iio/accel/bmi088-accel-spi.c b/drivers/iio/accel/bmi088-accel-spi.c
new file mode 100644
index 000000000000..dd1e3f6cf211
--- /dev/null
+++ b/drivers/iio/accel/bmi088-accel-spi.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 3-axis accelerometer driver supporting following Bosch-Sensortec chips:
+ * - BMI088
+ *
+ * Copyright (c) 2018-2020, Topic Embedded Products
+ */
+
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+
+#include "bmi088-accel.h"
+
+static int bmi088_regmap_spi_write(void *context, const void *data, size_t count)
+{
+ struct spi_device *spi = context;
+
+ /* Write register is same as generic SPI */
+ return spi_write(spi, data, count);
+}
+
+static int bmi088_regmap_spi_read(void *context, const void *reg,
+ size_t reg_size, void *val, size_t val_size)
+{
+ struct spi_device *spi = context;
+ u8 addr[2];
+
+ addr[0] = *(u8 *)reg;
+ addr[0] |= BIT(7); /* Set RW = '1' */
+ addr[1] = 0; /* Read requires a dummy byte transfer */
+
+ return spi_write_then_read(spi, addr, sizeof(addr), val, val_size);
+}
+
+static struct regmap_bus bmi088_regmap_bus = {
+ .write = bmi088_regmap_spi_write,
+ .read = bmi088_regmap_spi_read,
+};
+
+static int bmi088_accel_probe(struct spi_device *spi)
+{
+ struct regmap *regmap;
+ const struct spi_device_id *id = spi_get_device_id(spi);
+
+ regmap = devm_regmap_init(&spi->dev, &bmi088_regmap_bus,
+ spi, &bmi088_regmap_conf);
+
+ if (IS_ERR(regmap)) {
+ dev_err(&spi->dev, "Failed to initialize spi regmap\n");
+ return PTR_ERR(regmap);
+ }
+
+ return bmi088_accel_core_probe(&spi->dev, regmap, spi->irq, id->name,
+ true);
+}
+
+static int bmi088_accel_remove(struct spi_device *spi)
+{
+ return bmi088_accel_core_remove(&spi->dev);
+}
+
+static const struct spi_device_id bmi088_accel_id[] = {
+ {"bmi088-accel", },
+ {}
+};
+MODULE_DEVICE_TABLE(spi, bmi088_accel_id);
+
+static struct spi_driver bmi088_accel_driver = {
+ .driver = {
+ .name = "bmi088_accel_spi",
+ .pm = &bmi088_accel_pm_ops,
+ },
+ .probe = bmi088_accel_probe,
+ .remove = bmi088_accel_remove,
+ .id_table = bmi088_accel_id,
+};
+module_spi_driver(bmi088_accel_driver);
+
+MODULE_AUTHOR("Niek van Agt <niek.van.agt@topicproducts.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("BMI088 accelerometer driver (SPI)");
diff --git a/drivers/iio/accel/bmi088-accel.h b/drivers/iio/accel/bmi088-accel.h
new file mode 100644
index 000000000000..5c25f16b672c
--- /dev/null
+++ b/drivers/iio/accel/bmi088-accel.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef BMI088_ACCEL_H
+#define BMI088_ACCEL_H
+
+#include <linux/pm.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+
+struct device;
+
+extern const struct regmap_config bmi088_regmap_conf;
+extern const struct dev_pm_ops bmi088_accel_pm_ops;
+
+int bmi088_accel_core_probe(struct device *dev, struct regmap *regmap, int irq,
+ const char *name, bool block_supported);
+int bmi088_accel_core_remove(struct device *dev);
+
+#endif /* BMI088_ACCEL_H */
--
2.17.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH v7 1/2] dt-bindings: iio: accel: Add bmi088 accelerometer bindings
2021-01-21 15:56 [PATCH v7 1/2] dt-bindings: iio: accel: Add bmi088 accelerometer bindings Mike Looijmans
2021-01-21 15:56 ` [PATCH v7 2/2] iio: accel: Add support for the Bosch-Sensortec BMI088 Mike Looijmans
@ 2021-01-22 14:00 ` Rob Herring
2021-01-23 15:38 ` Jonathan Cameron
2 siblings, 0 replies; 6+ messages in thread
From: Rob Herring @ 2021-01-22 14:00 UTC (permalink / raw)
To: Mike Looijmans
Cc: linux-kernel, Jonathan Cameron, Lars-Peter Clausen, Rob Herring,
linux-iio, Peter Meerwald-Stadler, devicetree
On Thu, 21 Jan 2021 16:56:58 +0100, Mike Looijmans wrote:
> This adds the device-tree bindings for the Bosch Sensortec BMI088 IMU,
> the accelerometer part.
>
> Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
>
> ---
>
> Changes in v7:
> Add additionalProperties
> Change bmi088_accel to bmi088-accel
> Add interrupt-names and adjust description
>
> Changes in v6:
> I't been almost a year since the last commit, sorry...
> Fixed the yaml errors
> Add interrupt, vdd and vddio properties
>
> Changes in v5:
> submit together with driver code as patch series
>
> Changes in v2:
> convert to yaml format
>
> .../bindings/iio/accel/bosch,bmi088.yaml | 66 +++++++++++++++++++
> 1 file changed, 66 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml
>
My bot found errors running 'make dt_binding_check' on your patch:
yamllint warnings/errors:
dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/iio/accel/bosch,bmi088.example.dt.yaml: bmi088-accel@1: 'spi-max-frequency' does not match any of the regexes: 'pinctrl-[0-9]+'
From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml
See https://patchwork.ozlabs.org/patch/1429940
This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.
If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:
pip3 install dtschema --upgrade
Please check and re-submit.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v7 1/2] dt-bindings: iio: accel: Add bmi088 accelerometer bindings
2021-01-21 15:56 [PATCH v7 1/2] dt-bindings: iio: accel: Add bmi088 accelerometer bindings Mike Looijmans
2021-01-21 15:56 ` [PATCH v7 2/2] iio: accel: Add support for the Bosch-Sensortec BMI088 Mike Looijmans
2021-01-22 14:00 ` [PATCH v7 1/2] dt-bindings: iio: accel: Add bmi088 accelerometer bindings Rob Herring
@ 2021-01-23 15:38 ` Jonathan Cameron
[not found] ` <1b153bce-a66a-45ee-a5c6-963ea6fb1c82.949ef384-8293-46b8-903f-40a477c056ae.31062d28-ea32-4cba-9e19-a7434c115d8e@emailsignatures365.codetwo.com>
2 siblings, 1 reply; 6+ messages in thread
From: Jonathan Cameron @ 2021-01-23 15:38 UTC (permalink / raw)
To: Mike Looijmans
Cc: linux-iio, Lars-Peter Clausen, Peter Meerwald-Stadler,
Rob Herring, devicetree, linux-kernel
On Thu, 21 Jan 2021 16:56:58 +0100
Mike Looijmans <mike.looijmans@topic.nl> wrote:
> This adds the device-tree bindings for the Bosch Sensortec BMI088 IMU,
> the accelerometer part.
>
> Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
Just the issue the build bot found. Otherwise looks good to me.
Jonathan
>
> ---
>
> Changes in v7:
> Add additionalProperties
> Change bmi088_accel to bmi088-accel
> Add interrupt-names and adjust description
>
> Changes in v6:
> I't been almost a year since the last commit, sorry...
> Fixed the yaml errors
> Add interrupt, vdd and vddio properties
>
> Changes in v5:
> submit together with driver code as patch series
>
> Changes in v2:
> convert to yaml format
>
> .../bindings/iio/accel/bosch,bmi088.yaml | 66 +++++++++++++++++++
> 1 file changed, 66 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml
>
> diff --git a/Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml b/Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml
> new file mode 100644
> index 000000000000..db5dbaf80fa2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml
> @@ -0,0 +1,66 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/accel/bosch,bmi088.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Bosch BMI088 IMU accelerometer part
> +
> +maintainers:
> + - Mike Looijmans <mike.looijmans@topic.nl>
> +
> +description: |
> + Acceleration part of the IMU sensor with an SPI interface
> + Specifications about the sensor can be found at:
> + https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmi088-ds001.pdf
> +
> +properties:
> + compatible:
> + enum:
> + - bosch,bmi088-accel
> +
> + reg:
> + maxItems: 1
> +
> + vdd-supply: true
> +
> + vddio-supply: true
> +
> + interrupts:
> + minItems: 1
> + maxItems: 2
> + description: |
> + Type should be either IRQ_TYPE_LEVEL_HIGH or IRQ_TYPE_LEVEL_LOW.
> + Two configurable interrupt lines exist.
> +
> + interrupt-names:
> + description: Specify which interrupt line is in use.
> + items:
> + enum:
> + - INT1
> + - INT2
> + minItems: 1
> + maxItems: 2
As per Rob's build bot you need.
spi-max-frequency: true
If that's all that comes up and Rob is happy with this I can fix that up whilst
applying. Please try to run the checks suggested in Rob's build bot message
before submitting binding patches though.
> +
> +required:
> + - compatible
> + - reg
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/irq.h>
> + spi {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + bmi088-accel@1 {
> + compatible = "bosch,bmi088-accel";
> + reg = <1>;
> + spi-max-frequency = <10000000>;
> + interrupt-parent = <&gpio6>;
> + interrupts = <19 IRQ_TYPE_LEVEL_LOW>;
> + interrupt-names = "INT2";
> + };
> + };
> +...
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v7 2/2] iio: accel: Add support for the Bosch-Sensortec BMI088
2021-01-21 15:56 ` [PATCH v7 2/2] iio: accel: Add support for the Bosch-Sensortec BMI088 Mike Looijmans
@ 2021-01-23 15:49 ` Jonathan Cameron
0 siblings, 0 replies; 6+ messages in thread
From: Jonathan Cameron @ 2021-01-23 15:49 UTC (permalink / raw)
To: Mike Looijmans
Cc: linux-iio, Dan Robertson, Gaëtan André,
Jonathan Bakker, Lars-Peter Clausen, Linus Walleij,
Peter Meerwald-Stadler, linux-kernel
On Thu, 21 Jan 2021 16:56:59 +0100
Mike Looijmans <mike.looijmans@topic.nl> wrote:
> The BMI088 is a combined module with both accelerometer and gyroscope.
> This adds the accelerometer driver support for the SPI interface.
> The gyroscope part is already supported by the BMG160 driver.
>
> Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
>
..
> diff --git a/drivers/iio/accel/bmi088-accel-core.c b/drivers/iio/accel/bmi088-accel-core.c
> new file mode 100644
> index 000000000000..d7dc6f3e2fa6
> --- /dev/null
> +++ b/drivers/iio/accel/bmi088-accel-core.c
> @@ -0,0 +1,632 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * 3-axis accelerometer driver supporting following Bosch-Sensortec chips:
> + * - BMI088
> + *
> + * Copyright (c) 2018-2021, Topic Embedded Products
> + */
> +
> +#include <asm/unaligned.h>
Ah. I forgot to highlight this one. Oddly convention is
to do alphabetical order, but in groups. Generic first
(e.g. linux/*.h) and then specific (asm/*) and finally
as you have it, local headers.
Mind you it's not universal in the kernel, but I think this
is one of the more common patterns and it's definitely
preferred in IIO.
> +#include <linux/acpi.h>
> +#include <linux/delay.h>
> +#include <linux/iio/iio.h>
> +#include <linux/iio/sysfs.h>
> +#include <linux/interrupt.h>
> +#include <linux/module.h>
> +#include <linux/pm.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regmap.h>
> +#include <linux/slab.h>
> +
> +#include "bmi088-accel.h"
> +
...
> +static int bmi088_accel_set_power_state_on(struct bmi088_accel_data *data)
Linus Walleij's query in v6 needs addressing (it crossed with you posting v7 I think)
> +{
> + struct device *dev = regmap_get_device(data->regmap);
> + int ret;
> +
> + ret = pm_runtime_get_sync(dev);
> + if (ret < 0) {
> + pm_runtime_put_noidle(dev);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int bmi088_accel_set_power_state_off(struct bmi088_accel_data *data)
> +{
> + struct device *dev = regmap_get_device(data->regmap);
> + int ret;
> +
> + pm_runtime_mark_last_busy(dev);
> + ret = pm_runtime_put_autosuspend(dev);
> +
> + return ret < 0 ? ret : 0;
> +}
> +
> +/*
> + * The register ACC_PWR_CTRL enables and disables the accelerometer and the
> + * temperature sensor.
> + */
> +static int bmi088_accel_enable(struct bmi088_accel_data *data, bool on_off)
> +{
> + struct device *dev = regmap_get_device(data->regmap);
> + unsigned int val = on_off ? 0x4 : 0x0;
> + int ret;
> +
> + ret = regmap_write(data->regmap, BMI088_ACCEL_REG_PWR_CTRL, val);
> + if (ret) {
> + dev_err(dev, "Error writing ACC_PWR_CTRL reg\n");
> + return ret;
> + }
> + /* Datasheet recommends to wait at least 5ms before communication */
> + usleep_range(5000, 6000);
> +
> + return 0;
> +}
> +
> +/* In suspend mode, only the accelerometer is powered down. */
> +static int bmi088_accel_set_mode(struct bmi088_accel_data *data,
> + enum bmi088_power_modes mode)
> +{
> + struct device *dev = regmap_get_device(data->regmap);
> + unsigned int val = mode == BMI088_ACCEL_MODE_SUSPEND ? 0x3 : 0x0;
> + int ret;
> +
> + ret = regmap_write(data->regmap, BMI088_ACCEL_REG_PWR_CONF, val);
> + if (ret) {
> + dev_err(dev, "Error writing ACCEL_PWR_CONF reg\n");
> + return ret;
> + }
> +
> + return 0;
> +}
> +
...
> +int bmi088_accel_core_probe(struct device *dev, struct regmap *regmap,
> + int irq, const char *name, bool block_supported)
> +{
> + struct bmi088_accel_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);
> + dev_set_drvdata(dev, indio_dev);
> +
> + data->regmap = regmap;
> +
> + ret = bmi088_accel_chip_init(data);
> + if (ret)
> + return ret;
> +
> + mutex_init(&data->mutex);
> +
> + indio_dev->dev.parent = dev;
> + indio_dev->channels = data->chip_info->channels;
> + indio_dev->num_channels = data->chip_info->num_channels;
> + indio_dev->name = name ? name : data->chip_info->name;
> + indio_dev->available_scan_masks = bmi088_accel_scan_masks;
> + indio_dev->modes = INDIO_DIRECT_MODE;
> + indio_dev->info = &bmi088_accel_info;
> +
> + ret = pm_runtime_set_active(dev);
> + if (ret)
> + return ret;
> +
> + pm_runtime_enable(dev);
> + pm_runtime_set_autosuspend_delay(dev, BMI088_AUTO_SUSPEND_DELAY_MS);
> + pm_runtime_use_autosuspend(dev);
> +
> + ret = iio_device_register(indio_dev);
> + if (ret)
> + dev_err(dev, "Unable to register iio device\n");
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(bmi088_accel_core_probe);
> +
> +static void bmi088_accel_suspend_impl(struct bmi088_accel_data *data)
> +{
> + mutex_lock(&data->mutex);
> + bmi088_accel_set_mode(data, BMI088_ACCEL_MODE_SUSPEND);
> + bmi088_accel_enable(data, false);
> + mutex_unlock(&data->mutex);
> +}accel_supsn
> +
> +int bmi088_accel_core_remove(struct device *dev)
> +{
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> + struct bmi088_accel_data *data = iio_priv(indio_dev);
> +
> + iio_device_unregister(indio_dev);
> +
> + pm_runtime_disable(dev);
> + pm_runtime_set_suspended(dev);
> + pm_runtime_put_noidle(dev);
> + bmi088_accel_suspend_impl(data);
Sorry, did read your response to v6 review quick enough or I'd have
commented on it there.
Whilst it seems convenient I would rather you didn't use this shared
function. It obscures what is going on a little so it's not obvious
which elements of probe this is undoing.
the accel_enable is buried in *chip_init() so I'd ideally like to
see an *chip_uninit() that undoes only what was done in chip_init()
(next to it so it's easy to check!)
The set_mode() bit is harder to identify in probe and actually makes
me a bit suspicious. If we probe the driver and immediately read
I suspect the device may not actually be turned on?
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(bmi088_accel_core_remove);
> +
> +/* When going into system sleep, put the chip in power down */
> +static int __maybe_unused bmi088_accel_suspend(struct device *dev)
> +{
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> + struct bmi088_accel_data *data = iio_priv(indio_dev);
> +
> + bmi088_accel_suspend_impl(data);
> +
> + return 0;
> +}
> +
> +static int __maybe_unused bmi088_accel_resume(struct device *dev)
> +{
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> + struct bmi088_accel_data *data = iio_priv(indio_dev);
> +
> + mutex_lock(&data->mutex);
> + bmi088_accel_enable(data, true);
> + bmi088_accel_set_mode(data, BMI088_ACCEL_MODE_ACTIVE);
> + mutex_unlock(&data->mutex);
> +
> + return 0;
> +}
> +
> +/* For runtime PM put the chip in suspend mode */
> +static int __maybe_unused bmi088_accel_runtime_suspend(struct device *dev)
> +{
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> + struct bmi088_accel_data *data = iio_priv(indio_dev);
> +
> + return bmi088_accel_set_mode(data, BMI088_ACCEL_MODE_SUSPEND);
> +}
> +
> +static int __maybe_unused bmi088_accel_runtime_resume(struct device *dev)
> +{
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> + struct bmi088_accel_data *data = iio_priv(indio_dev);
> + int ret;
> +
> + ret = bmi088_accel_set_mode(data, BMI088_ACCEL_MODE_ACTIVE);
> + if (ret)
> + return ret;
> +
> + usleep_range(BMI088_ACCEL_MAX_STARTUP_TIME_US,
> + BMI088_ACCEL_MAX_STARTUP_TIME_US * 2);
> +
> + return 0;
> +}
> +
> +const struct dev_pm_ops bmi088_accel_pm_ops = {
> + SET_SYSTEM_SLEEP_PM_OPS(bmi088_accel_suspend, bmi088_accel_resume)
> + SET_RUNTIME_PM_OPS(bmi088_accel_runtime_suspend,
> + bmi088_accel_runtime_resume, NULL)
> +};
> +EXPORT_SYMBOL_GPL(bmi088_accel_pm_ops);
> +
> +MODULE_AUTHOR("Niek van Agt <niek.van.agt@topicproducts.com>");
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("BMI088 accelerometer driver (core)");
...
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v7 1/2] dt-bindings: iio: accel: Add bmi088 accelerometer bindings
[not found] ` <1b153bce-a66a-45ee-a5c6-963ea6fb1c82.0d2bd5fa-15cc-4b27-b94e-83614f9e5b38.19976ff0-2a49-43f4-afd2-1dfd0965f697@emailsignatures365.codetwo.com>
@ 2021-01-25 7:53 ` Mike Looijmans
0 siblings, 0 replies; 6+ messages in thread
From: Mike Looijmans @ 2021-01-25 7:53 UTC (permalink / raw)
To: Jonathan Cameron
Cc: linux-iio, Lars-Peter Clausen, Peter Meerwald-Stadler,
Rob Herring, devicetree, linux-kernel
See below
Met vriendelijke groet / kind regards,
Mike Looijmans
System Expert
TOPIC Embedded Products B.V.
Materiaalweg 4, 5681 RJ Best
The Netherlands
T: +31 (0) 499 33 69 69
E: mike.looijmans@topicproducts.com
W: www.topicproducts.com
Please consider the environment before printing this e-mail
On 23-01-2021 16:38, Jonathan Cameron wrote:
> On Thu, 21 Jan 2021 16:56:58 +0100
> Mike Looijmans <mike.looijmans@topic.nl> wrote:
>
>> This adds the device-tree bindings for the Bosch Sensortec BMI088 IMU,
>> the accelerometer part.
>>
>> Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
> Just the issue the build bot found. Otherwise looks good to me.
>
> Jonathan
>
>> ---
>>
>> Changes in v7:
>> Add additionalProperties
>> Change bmi088_accel to bmi088-accel
>> Add interrupt-names and adjust description
>>
>> Changes in v6:
>> I't been almost a year since the last commit, sorry...
>> Fixed the yaml errors
>> Add interrupt, vdd and vddio properties
>>
>> Changes in v5:
>> submit together with driver code as patch series
>>
>> Changes in v2:
>> convert to yaml format
>>
>> .../bindings/iio/accel/bosch,bmi088.yaml | 66 +++++++++++++++++++
>> 1 file changed, 66 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml b/Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml
>> new file mode 100644
>> index 000000000000..db5dbaf80fa2
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml
>> @@ -0,0 +1,66 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/iio/accel/bosch,bmi088.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Bosch BMI088 IMU accelerometer part
>> +
>> +maintainers:
>> + - Mike Looijmans <mike.looijmans@topic.nl>
>> +
>> +description: |
>> + Acceleration part of the IMU sensor with an SPI interface
>> + Specifications about the sensor can be found at:
>> + https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmi088-ds001.pdf
>> +
>> +properties:
>> + compatible:
>> + enum:
>> + - bosch,bmi088-accel
>> +
>> + reg:
>> + maxItems: 1
>> +
>> + vdd-supply: true
>> +
>> + vddio-supply: true
>> +
>> + interrupts:
>> + minItems: 1
>> + maxItems: 2
>> + description: |
>> + Type should be either IRQ_TYPE_LEVEL_HIGH or IRQ_TYPE_LEVEL_LOW.
>> + Two configurable interrupt lines exist.
>> +
>> + interrupt-names:
>> + description: Specify which interrupt line is in use.
>> + items:
>> + enum:
>> + - INT1
>> + - INT2
>> + minItems: 1
>> + maxItems: 2
> As per Rob's build bot you need.
>
> spi-max-frequency: true
>
> If that's all that comes up and Rob is happy with this I can fix that up whilst
> applying. Please try to run the checks suggested in Rob's build bot message
> before submitting binding patches though.
There'll be a v8 it seems, so I've already added it. Seems that I need
to upgrade those definition files every day...
>> +
>> +required:
>> + - compatible
>> + - reg
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> + - |
>> + #include <dt-bindings/interrupt-controller/irq.h>
>> + spi {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + bmi088-accel@1 {
>> + compatible = "bosch,bmi088-accel";
>> + reg = <1>;
>> + spi-max-frequency = <10000000>;
>> + interrupt-parent = <&gpio6>;
>> + interrupts = <19 IRQ_TYPE_LEVEL_LOW>;
>> + interrupt-names = "INT2";
>> + };
>> + };
>> +...
--
Mike Looijmans
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2021-01-25 7:56 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-01-21 15:56 [PATCH v7 1/2] dt-bindings: iio: accel: Add bmi088 accelerometer bindings Mike Looijmans
2021-01-21 15:56 ` [PATCH v7 2/2] iio: accel: Add support for the Bosch-Sensortec BMI088 Mike Looijmans
2021-01-23 15:49 ` Jonathan Cameron
2021-01-22 14:00 ` [PATCH v7 1/2] dt-bindings: iio: accel: Add bmi088 accelerometer bindings Rob Herring
2021-01-23 15:38 ` Jonathan Cameron
[not found] ` <1b153bce-a66a-45ee-a5c6-963ea6fb1c82.949ef384-8293-46b8-903f-40a477c056ae.31062d28-ea32-4cba-9e19-a7434c115d8e@emailsignatures365.codetwo.com>
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2021-01-25 7:53 ` Mike Looijmans
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