config BMG160
tristate "BOSCH BMG160 Gyro Sensor"
- depends on I2C
+ depends on (I2C || SPI_MASTER)
select IIO_BUFFER
select IIO_TRIGGERED_BUFFER
- select REGMAP_I2C
+ select BMG160_I2C if (I2C)
help
- Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
- driver. This driver also supports BMI055 gyroscope.
+ Say yes here to build support for BOSCH BMG160 Tri-axis Gyro Sensor
+ driver connected via I2C or SPI. This driver also supports BMI055
+ gyroscope.
This driver can also be built as a module. If so, the module
- will be called bmg160.
+ will be called bmg160_i2c.
+
+config BMG160_I2C
+ tristate
+ select REGMAP_I2C
config HID_SENSOR_GYRO_3D
depends on HID_SENSOR_HUB
obj-$(CONFIG_ADIS16136) += adis16136.o
obj-$(CONFIG_ADIS16260) += adis16260.o
obj-$(CONFIG_ADXRS450) += adxrs450.o
-obj-$(CONFIG_BMG160) += bmg160.o
+obj-$(CONFIG_BMG160) += bmg160_core.o
+obj-$(CONFIG_BMG160_I2C) += bmg160_i2c.o
obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o
+++ /dev/null
-/*
- * BMG160 Gyro Sensor driver
- * Copyright (c) 2014, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- */
-
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/acpi.h>
-#include <linux/gpio/consumer.h>
-#include <linux/pm.h>
-#include <linux/pm_runtime.h>
-#include <linux/iio/iio.h>
-#include <linux/iio/sysfs.h>
-#include <linux/iio/buffer.h>
-#include <linux/iio/trigger.h>
-#include <linux/iio/events.h>
-#include <linux/iio/trigger_consumer.h>
-#include <linux/iio/triggered_buffer.h>
-#include <linux/regmap.h>
-
-#define BMG160_DRV_NAME "bmg160"
-#define BMG160_IRQ_NAME "bmg160_event"
-#define BMG160_GPIO_NAME "gpio_int"
-
-#define BMG160_REG_CHIP_ID 0x00
-#define BMG160_CHIP_ID_VAL 0x0F
-
-#define BMG160_REG_PMU_LPW 0x11
-#define BMG160_MODE_NORMAL 0x00
-#define BMG160_MODE_DEEP_SUSPEND 0x20
-#define BMG160_MODE_SUSPEND 0x80
-
-#define BMG160_REG_RANGE 0x0F
-
-#define BMG160_RANGE_2000DPS 0
-#define BMG160_RANGE_1000DPS 1
-#define BMG160_RANGE_500DPS 2
-#define BMG160_RANGE_250DPS 3
-#define BMG160_RANGE_125DPS 4
-
-#define BMG160_REG_PMU_BW 0x10
-#define BMG160_NO_FILTER 0
-#define BMG160_DEF_BW 100
-
-#define BMG160_REG_INT_MAP_0 0x17
-#define BMG160_INT_MAP_0_BIT_ANY BIT(1)
-
-#define BMG160_REG_INT_MAP_1 0x18
-#define BMG160_INT_MAP_1_BIT_NEW_DATA BIT(0)
-
-#define BMG160_REG_INT_RST_LATCH 0x21
-#define BMG160_INT_MODE_LATCH_RESET 0x80
-#define BMG160_INT_MODE_LATCH_INT 0x0F
-#define BMG160_INT_MODE_NON_LATCH_INT 0x00
-
-#define BMG160_REG_INT_EN_0 0x15
-#define BMG160_DATA_ENABLE_INT BIT(7)
-
-#define BMG160_REG_INT_EN_1 0x16
-#define BMG160_INT1_BIT_OD BIT(1)
-
-#define BMG160_REG_XOUT_L 0x02
-#define BMG160_AXIS_TO_REG(axis) (BMG160_REG_XOUT_L + (axis * 2))
-
-#define BMG160_REG_SLOPE_THRES 0x1B
-#define BMG160_SLOPE_THRES_MASK 0x0F
-
-#define BMG160_REG_MOTION_INTR 0x1C
-#define BMG160_INT_MOTION_X BIT(0)
-#define BMG160_INT_MOTION_Y BIT(1)
-#define BMG160_INT_MOTION_Z BIT(2)
-#define BMG160_ANY_DUR_MASK 0x30
-#define BMG160_ANY_DUR_SHIFT 4
-
-#define BMG160_REG_INT_STATUS_2 0x0B
-#define BMG160_ANY_MOTION_MASK 0x07
-#define BMG160_ANY_MOTION_BIT_X BIT(0)
-#define BMG160_ANY_MOTION_BIT_Y BIT(1)
-#define BMG160_ANY_MOTION_BIT_Z BIT(2)
-
-#define BMG160_REG_TEMP 0x08
-#define BMG160_TEMP_CENTER_VAL 23
-
-#define BMG160_MAX_STARTUP_TIME_MS 80
-
-#define BMG160_AUTO_SUSPEND_DELAY_MS 2000
-
-struct bmg160_data {
- struct device *dev;
- struct regmap *regmap;
- struct iio_trigger *dready_trig;
- struct iio_trigger *motion_trig;
- struct mutex mutex;
- s16 buffer[8];
- u8 bw_bits;
- u32 dps_range;
- int ev_enable_state;
- int slope_thres;
- bool dready_trigger_on;
- bool motion_trigger_on;
- int irq;
-};
-
-enum bmg160_axis {
- AXIS_X,
- AXIS_Y,
- AXIS_Z,
-};
-
-static const struct {
- int val;
- int bw_bits;
-} bmg160_samp_freq_table[] = { {100, 0x07},
- {200, 0x06},
- {400, 0x03},
- {1000, 0x02},
- {2000, 0x01} };
-
-static const struct {
- int scale;
- int dps_range;
-} bmg160_scale_table[] = { { 1065, BMG160_RANGE_2000DPS},
- { 532, BMG160_RANGE_1000DPS},
- { 266, BMG160_RANGE_500DPS},
- { 133, BMG160_RANGE_250DPS},
- { 66, BMG160_RANGE_125DPS} };
-
-static struct regmap_config bmg160_regmap_i2c_conf = {
- .reg_bits = 8,
- .val_bits = 8,
- .max_register = 0x3f
-};
-
-static int bmg160_set_mode(struct bmg160_data *data, u8 mode)
-{
- int ret;
-
- ret = regmap_write(data->regmap, BMG160_REG_PMU_LPW, mode);
- if (ret < 0) {
- dev_err(data->dev, "Error writing reg_pmu_lpw\n");
- return ret;
- }
-
- return 0;
-}
-
-static int bmg160_convert_freq_to_bit(int val)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(bmg160_samp_freq_table); ++i) {
- if (bmg160_samp_freq_table[i].val == val)
- return bmg160_samp_freq_table[i].bw_bits;
- }
-
- return -EINVAL;
-}
-
-static int bmg160_set_bw(struct bmg160_data *data, int val)
-{
- int ret;
- int bw_bits;
-
- bw_bits = bmg160_convert_freq_to_bit(val);
- if (bw_bits < 0)
- return bw_bits;
-
- ret = regmap_write(data->regmap, BMG160_REG_PMU_BW, bw_bits);
- if (ret < 0) {
- dev_err(data->dev, "Error writing reg_pmu_bw\n");
- return ret;
- }
-
- data->bw_bits = bw_bits;
-
- return 0;
-}
-
-static int bmg160_chip_init(struct bmg160_data *data)
-{
- int ret;
- unsigned int val;
-
- ret = regmap_read(data->regmap, BMG160_REG_CHIP_ID, &val);
- if (ret < 0) {
- dev_err(data->dev, "Error reading reg_chip_id\n");
- return ret;
- }
-
- dev_dbg(data->dev, "Chip Id %x\n", val);
- if (val != BMG160_CHIP_ID_VAL) {
- dev_err(data->dev, "invalid chip %x\n", val);
- return -ENODEV;
- }
-
- ret = bmg160_set_mode(data, BMG160_MODE_NORMAL);
- if (ret < 0)
- return ret;
-
- /* Wait upto 500 ms to be ready after changing mode */
- usleep_range(500, 1000);
-
- /* Set Bandwidth */
- ret = bmg160_set_bw(data, BMG160_DEF_BW);
- if (ret < 0)
- return ret;
-
- /* Set Default Range */
- ret = regmap_write(data->regmap, BMG160_REG_RANGE, BMG160_RANGE_500DPS);
- if (ret < 0) {
- dev_err(data->dev, "Error writing reg_range\n");
- return ret;
- }
- data->dps_range = BMG160_RANGE_500DPS;
-
- ret = regmap_read(data->regmap, BMG160_REG_SLOPE_THRES, &val);
- if (ret < 0) {
- dev_err(data->dev, "Error reading reg_slope_thres\n");
- return ret;
- }
- data->slope_thres = val;
-
- /* Set default interrupt mode */
- ret = regmap_update_bits(data->regmap, BMG160_REG_INT_EN_1,
- BMG160_INT1_BIT_OD, 0);
- if (ret < 0) {
- dev_err(data->dev, "Error updating bits in reg_int_en_1\n");
- return ret;
- }
-
- ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
- BMG160_INT_MODE_LATCH_INT |
- BMG160_INT_MODE_LATCH_RESET);
- if (ret < 0) {
- dev_err(data->dev,
- "Error writing reg_motion_intr\n");
- return ret;
- }
-
- return 0;
-}
-
-static int bmg160_set_power_state(struct bmg160_data *data, bool on)
-{
-#ifdef CONFIG_PM
- int ret;
-
- if (on)
- ret = pm_runtime_get_sync(data->dev);
- else {
- pm_runtime_mark_last_busy(data->dev);
- ret = pm_runtime_put_autosuspend(data->dev);
- }
-
- if (ret < 0) {
- dev_err(data->dev,
- "Failed: bmg160_set_power_state for %d\n", on);
- if (on)
- pm_runtime_put_noidle(data->dev);
-
- return ret;
- }
-#endif
-
- return 0;
-}
-
-static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
- bool status)
-{
- int ret;
-
- /* Enable/Disable INT_MAP0 mapping */
- ret = regmap_update_bits(data->regmap, BMG160_REG_INT_MAP_0,
- BMG160_INT_MAP_0_BIT_ANY,
- (status ? BMG160_INT_MAP_0_BIT_ANY : 0));
- if (ret < 0) {
- dev_err(data->dev, "Error updating bits reg_int_map0\n");
- return ret;
- }
-
- /* Enable/Disable slope interrupts */
- if (status) {
- /* Update slope thres */
- ret = regmap_write(data->regmap, BMG160_REG_SLOPE_THRES,
- data->slope_thres);
- if (ret < 0) {
- dev_err(data->dev,
- "Error writing reg_slope_thres\n");
- return ret;
- }
-
- ret = regmap_write(data->regmap, BMG160_REG_MOTION_INTR,
- BMG160_INT_MOTION_X | BMG160_INT_MOTION_Y |
- BMG160_INT_MOTION_Z);
- if (ret < 0) {
- dev_err(data->dev,
- "Error writing reg_motion_intr\n");
- return ret;
- }
-
- /*
- * New data interrupt is always non-latched,
- * which will have higher priority, so no need
- * to set latched mode, we will be flooded anyway with INTR
- */
- if (!data->dready_trigger_on) {
- ret = regmap_write(data->regmap,
- BMG160_REG_INT_RST_LATCH,
- BMG160_INT_MODE_LATCH_INT |
- BMG160_INT_MODE_LATCH_RESET);
- if (ret < 0) {
- dev_err(data->dev,
- "Error writing reg_rst_latch\n");
- return ret;
- }
- }
-
- ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0,
- BMG160_DATA_ENABLE_INT);
-
- } else {
- ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0, 0);
- }
-
- if (ret < 0) {
- dev_err(data->dev, "Error writing reg_int_en0\n");
- return ret;
- }
-
- return 0;
-}
-
-static int bmg160_setup_new_data_interrupt(struct bmg160_data *data,
- bool status)
-{
- int ret;
-
- /* Enable/Disable INT_MAP1 mapping */
- ret = regmap_update_bits(data->regmap, BMG160_REG_INT_MAP_1,
- BMG160_INT_MAP_1_BIT_NEW_DATA,
- (status ? BMG160_INT_MAP_1_BIT_NEW_DATA : 0));
- if (ret < 0) {
- dev_err(data->dev, "Error updating bits in reg_int_map1\n");
- return ret;
- }
-
- if (status) {
- ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
- BMG160_INT_MODE_NON_LATCH_INT |
- BMG160_INT_MODE_LATCH_RESET);
- if (ret < 0) {
- dev_err(data->dev,
- "Error writing reg_rst_latch\n");
- return ret;
- }
-
- ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0,
- BMG160_DATA_ENABLE_INT);
-
- } else {
- /* Restore interrupt mode */
- ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
- BMG160_INT_MODE_LATCH_INT |
- BMG160_INT_MODE_LATCH_RESET);
- if (ret < 0) {
- dev_err(data->dev,
- "Error writing reg_rst_latch\n");
- return ret;
- }
-
- ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0, 0);
- }
-
- if (ret < 0) {
- dev_err(data->dev, "Error writing reg_int_en0\n");
- return ret;
- }
-
- return 0;
-}
-
-static int bmg160_get_bw(struct bmg160_data *data, int *val)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(bmg160_samp_freq_table); ++i) {
- if (bmg160_samp_freq_table[i].bw_bits == data->bw_bits) {
- *val = bmg160_samp_freq_table[i].val;
- return IIO_VAL_INT;
- }
- }
-
- return -EINVAL;
-}
-
-static int bmg160_set_scale(struct bmg160_data *data, int val)
-{
- int ret, i;
-
- for (i = 0; i < ARRAY_SIZE(bmg160_scale_table); ++i) {
- if (bmg160_scale_table[i].scale == val) {
- ret = regmap_write(data->regmap, BMG160_REG_RANGE,
- bmg160_scale_table[i].dps_range);
- if (ret < 0) {
- dev_err(data->dev,
- "Error writing reg_range\n");
- return ret;
- }
- data->dps_range = bmg160_scale_table[i].dps_range;
- return 0;
- }
- }
-
- return -EINVAL;
-}
-
-static int bmg160_get_temp(struct bmg160_data *data, int *val)
-{
- int ret;
- unsigned int raw_val;
-
- mutex_lock(&data->mutex);
- ret = bmg160_set_power_state(data, true);
- if (ret < 0) {
- mutex_unlock(&data->mutex);
- return ret;
- }
-
- ret = regmap_read(data->regmap, BMG160_REG_TEMP, &raw_val);
- if (ret < 0) {
- dev_err(data->dev, "Error reading reg_temp\n");
- bmg160_set_power_state(data, false);
- mutex_unlock(&data->mutex);
- return ret;
- }
-
- *val = sign_extend32(raw_val, 7);
- ret = bmg160_set_power_state(data, false);
- mutex_unlock(&data->mutex);
- if (ret < 0)
- return ret;
-
- return IIO_VAL_INT;
-}
-
-static int bmg160_get_axis(struct bmg160_data *data, int axis, int *val)
-{
- int ret;
- unsigned int raw_val;
-
- mutex_lock(&data->mutex);
- ret = bmg160_set_power_state(data, true);
- if (ret < 0) {
- mutex_unlock(&data->mutex);
- return ret;
- }
-
- ret = regmap_bulk_read(data->regmap, BMG160_AXIS_TO_REG(axis), &raw_val,
- 2);
- if (ret < 0) {
- dev_err(data->dev, "Error reading axis %d\n", axis);
- bmg160_set_power_state(data, false);
- mutex_unlock(&data->mutex);
- return ret;
- }
-
- *val = sign_extend32(raw_val, 15);
- ret = bmg160_set_power_state(data, false);
- mutex_unlock(&data->mutex);
- if (ret < 0)
- return ret;
-
- return IIO_VAL_INT;
-}
-
-static int bmg160_read_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int *val, int *val2, long mask)
-{
- struct bmg160_data *data = iio_priv(indio_dev);
- int ret;
-
- switch (mask) {
- case IIO_CHAN_INFO_RAW:
- switch (chan->type) {
- case IIO_TEMP:
- return bmg160_get_temp(data, val);
- case IIO_ANGL_VEL:
- if (iio_buffer_enabled(indio_dev))
- return -EBUSY;
- else
- return bmg160_get_axis(data, chan->scan_index,
- val);
- default:
- return -EINVAL;
- }
- case IIO_CHAN_INFO_OFFSET:
- if (chan->type == IIO_TEMP) {
- *val = BMG160_TEMP_CENTER_VAL;
- return IIO_VAL_INT;
- } else
- return -EINVAL;
- case IIO_CHAN_INFO_SCALE:
- *val = 0;
- switch (chan->type) {
- case IIO_TEMP:
- *val2 = 500000;
- return IIO_VAL_INT_PLUS_MICRO;
- case IIO_ANGL_VEL:
- {
- int i;
-
- for (i = 0; i < ARRAY_SIZE(bmg160_scale_table); ++i) {
- if (bmg160_scale_table[i].dps_range ==
- data->dps_range) {
- *val2 = bmg160_scale_table[i].scale;
- return IIO_VAL_INT_PLUS_MICRO;
- }
- }
- return -EINVAL;
- }
- default:
- return -EINVAL;
- }
- case IIO_CHAN_INFO_SAMP_FREQ:
- *val2 = 0;
- mutex_lock(&data->mutex);
- ret = bmg160_get_bw(data, val);
- mutex_unlock(&data->mutex);
- return ret;
- default:
- return -EINVAL;
- }
-}
-
-static int bmg160_write_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int val, int val2, long mask)
-{
- struct bmg160_data *data = iio_priv(indio_dev);
- int ret;
-
- switch (mask) {
- case IIO_CHAN_INFO_SAMP_FREQ:
- mutex_lock(&data->mutex);
- /*
- * Section 4.2 of spec
- * In suspend mode, the only supported operations are reading
- * registers as well as writing to the (0x14) softreset
- * register. Since we will be in suspend mode by default, change
- * mode to power on for other writes.
- */
- ret = bmg160_set_power_state(data, true);
- if (ret < 0) {
- mutex_unlock(&data->mutex);
- return ret;
- }
- ret = bmg160_set_bw(data, val);
- if (ret < 0) {
- bmg160_set_power_state(data, false);
- mutex_unlock(&data->mutex);
- return ret;
- }
- ret = bmg160_set_power_state(data, false);
- mutex_unlock(&data->mutex);
- return ret;
- case IIO_CHAN_INFO_SCALE:
- if (val)
- return -EINVAL;
-
- mutex_lock(&data->mutex);
- /* Refer to comments above for the suspend mode ops */
- ret = bmg160_set_power_state(data, true);
- if (ret < 0) {
- mutex_unlock(&data->mutex);
- return ret;
- }
- ret = bmg160_set_scale(data, val2);
- if (ret < 0) {
- bmg160_set_power_state(data, false);
- mutex_unlock(&data->mutex);
- return ret;
- }
- ret = bmg160_set_power_state(data, false);
- mutex_unlock(&data->mutex);
- return ret;
- default:
- return -EINVAL;
- }
-
- return -EINVAL;
-}
-
-static int bmg160_read_event(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 bmg160_data *data = iio_priv(indio_dev);
-
- *val2 = 0;
- switch (info) {
- case IIO_EV_INFO_VALUE:
- *val = data->slope_thres & BMG160_SLOPE_THRES_MASK;
- break;
- default:
- return -EINVAL;
- }
-
- return IIO_VAL_INT;
-}
-
-static int bmg160_write_event(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 bmg160_data *data = iio_priv(indio_dev);
-
- switch (info) {
- case IIO_EV_INFO_VALUE:
- if (data->ev_enable_state)
- return -EBUSY;
- data->slope_thres &= ~BMG160_SLOPE_THRES_MASK;
- data->slope_thres |= (val & BMG160_SLOPE_THRES_MASK);
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int bmg160_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 bmg160_data *data = iio_priv(indio_dev);
-
- return data->ev_enable_state;
-}
-
-static int bmg160_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 bmg160_data *data = iio_priv(indio_dev);
- int ret;
-
- if (state && data->ev_enable_state)
- return 0;
-
- mutex_lock(&data->mutex);
-
- if (!state && data->motion_trigger_on) {
- data->ev_enable_state = 0;
- mutex_unlock(&data->mutex);
- return 0;
- }
- /*
- * We will expect the enable and disable to do operation in
- * in reverse order. This will happen here anyway as our
- * resume operation uses sync mode runtime pm calls, the
- * suspend operation will be delayed by autosuspend delay
- * So the disable operation will still happen in reverse of
- * enable operation. When runtime pm is disabled the mode
- * is always on so sequence doesn't matter
- */
- ret = bmg160_set_power_state(data, state);
- if (ret < 0) {
- mutex_unlock(&data->mutex);
- return ret;
- }
-
- ret = bmg160_setup_any_motion_interrupt(data, state);
- if (ret < 0) {
- bmg160_set_power_state(data, false);
- mutex_unlock(&data->mutex);
- return ret;
- }
-
- data->ev_enable_state = state;
- mutex_unlock(&data->mutex);
-
- return 0;
-}
-
-static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("100 200 400 1000 2000");
-
-static IIO_CONST_ATTR(in_anglvel_scale_available,
- "0.001065 0.000532 0.000266 0.000133 0.000066");
-
-static struct attribute *bmg160_attributes[] = {
- &iio_const_attr_sampling_frequency_available.dev_attr.attr,
- &iio_const_attr_in_anglvel_scale_available.dev_attr.attr,
- NULL,
-};
-
-static const struct attribute_group bmg160_attrs_group = {
- .attrs = bmg160_attributes,
-};
-
-static const struct iio_event_spec bmg160_event = {
- .type = IIO_EV_TYPE_ROC,
- .dir = IIO_EV_DIR_EITHER,
- .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) |
- BIT(IIO_EV_INFO_ENABLE)
-};
-
-#define BMG160_CHANNEL(_axis) { \
- .type = IIO_ANGL_VEL, \
- .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), \
- .scan_index = AXIS_##_axis, \
- .scan_type = { \
- .sign = 's', \
- .realbits = 16, \
- .storagebits = 16, \
- }, \
- .event_spec = &bmg160_event, \
- .num_event_specs = 1 \
-}
-
-static const struct iio_chan_spec bmg160_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,
- },
- BMG160_CHANNEL(X),
- BMG160_CHANNEL(Y),
- BMG160_CHANNEL(Z),
- IIO_CHAN_SOFT_TIMESTAMP(3),
-};
-
-static const struct iio_info bmg160_info = {
- .attrs = &bmg160_attrs_group,
- .read_raw = bmg160_read_raw,
- .write_raw = bmg160_write_raw,
- .read_event_value = bmg160_read_event,
- .write_event_value = bmg160_write_event,
- .write_event_config = bmg160_write_event_config,
- .read_event_config = bmg160_read_event_config,
- .driver_module = THIS_MODULE,
-};
-
-static irqreturn_t bmg160_trigger_handler(int irq, void *p)
-{
- struct iio_poll_func *pf = p;
- struct iio_dev *indio_dev = pf->indio_dev;
- struct bmg160_data *data = iio_priv(indio_dev);
- int bit, ret, i = 0;
- unsigned int val;
-
- mutex_lock(&data->mutex);
- for_each_set_bit(bit, indio_dev->active_scan_mask,
- indio_dev->masklength) {
- ret = regmap_bulk_read(data->regmap, BMG160_AXIS_TO_REG(bit),
- &val, 2);
- if (ret < 0) {
- mutex_unlock(&data->mutex);
- goto err;
- }
- data->buffer[i++] = ret;
- }
- mutex_unlock(&data->mutex);
-
- iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
- pf->timestamp);
-err:
- iio_trigger_notify_done(indio_dev->trig);
-
- return IRQ_HANDLED;
-}
-
-static int bmg160_trig_try_reen(struct iio_trigger *trig)
-{
- struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
- struct bmg160_data *data = iio_priv(indio_dev);
- int ret;
-
- /* new data interrupts don't need ack */
- if (data->dready_trigger_on)
- return 0;
-
- /* Set latched mode interrupt and clear any latched interrupt */
- ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
- BMG160_INT_MODE_LATCH_INT |
- BMG160_INT_MODE_LATCH_RESET);
- if (ret < 0) {
- dev_err(data->dev, "Error writing reg_rst_latch\n");
- return ret;
- }
-
- return 0;
-}
-
-static int bmg160_data_rdy_trigger_set_state(struct iio_trigger *trig,
- bool state)
-{
- struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
- struct bmg160_data *data = iio_priv(indio_dev);
- int ret;
-
- mutex_lock(&data->mutex);
-
- if (!state && data->ev_enable_state && data->motion_trigger_on) {
- data->motion_trigger_on = false;
- mutex_unlock(&data->mutex);
- return 0;
- }
-
- /*
- * Refer to comment in bmg160_write_event_config for
- * enable/disable operation order
- */
- ret = bmg160_set_power_state(data, state);
- if (ret < 0) {
- mutex_unlock(&data->mutex);
- return ret;
- }
- if (data->motion_trig == trig)
- ret = bmg160_setup_any_motion_interrupt(data, state);
- else
- ret = bmg160_setup_new_data_interrupt(data, state);
- if (ret < 0) {
- bmg160_set_power_state(data, false);
- mutex_unlock(&data->mutex);
- return ret;
- }
- if (data->motion_trig == trig)
- data->motion_trigger_on = state;
- else
- data->dready_trigger_on = state;
-
- mutex_unlock(&data->mutex);
-
- return 0;
-}
-
-static const struct iio_trigger_ops bmg160_trigger_ops = {
- .set_trigger_state = bmg160_data_rdy_trigger_set_state,
- .try_reenable = bmg160_trig_try_reen,
- .owner = THIS_MODULE,
-};
-
-static irqreturn_t bmg160_event_handler(int irq, void *private)
-{
- struct iio_dev *indio_dev = private;
- struct bmg160_data *data = iio_priv(indio_dev);
- int ret;
- int dir;
- unsigned int val;
-
- ret = regmap_read(data->regmap, BMG160_REG_INT_STATUS_2, &val);
- if (ret < 0) {
- dev_err(data->dev, "Error reading reg_int_status2\n");
- goto ack_intr_status;
- }
-
- if (val & 0x08)
- dir = IIO_EV_DIR_RISING;
- else
- dir = IIO_EV_DIR_FALLING;
-
- if (val & BMG160_ANY_MOTION_BIT_X)
- iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ANGL_VEL,
- 0,
- IIO_MOD_X,
- IIO_EV_TYPE_ROC,
- dir),
- iio_get_time_ns());
- if (val & BMG160_ANY_MOTION_BIT_Y)
- iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ANGL_VEL,
- 0,
- IIO_MOD_Y,
- IIO_EV_TYPE_ROC,
- dir),
- iio_get_time_ns());
- if (val & BMG160_ANY_MOTION_BIT_Z)
- iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ANGL_VEL,
- 0,
- IIO_MOD_Z,
- IIO_EV_TYPE_ROC,
- dir),
- iio_get_time_ns());
-
-ack_intr_status:
- if (!data->dready_trigger_on) {
- ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
- BMG160_INT_MODE_LATCH_INT |
- BMG160_INT_MODE_LATCH_RESET);
- if (ret < 0)
- dev_err(data->dev,
- "Error writing reg_rst_latch\n");
- }
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t bmg160_data_rdy_trig_poll(int irq, void *private)
-{
- struct iio_dev *indio_dev = private;
- struct bmg160_data *data = iio_priv(indio_dev);
-
- if (data->dready_trigger_on)
- iio_trigger_poll(data->dready_trig);
- else if (data->motion_trigger_on)
- iio_trigger_poll(data->motion_trig);
-
- if (data->ev_enable_state)
- return IRQ_WAKE_THREAD;
- else
- return IRQ_HANDLED;
-
-}
-
-static int bmg160_buffer_preenable(struct iio_dev *indio_dev)
-{
- struct bmg160_data *data = iio_priv(indio_dev);
-
- return bmg160_set_power_state(data, true);
-}
-
-static int bmg160_buffer_postdisable(struct iio_dev *indio_dev)
-{
- struct bmg160_data *data = iio_priv(indio_dev);
-
- return bmg160_set_power_state(data, false);
-}
-
-static const struct iio_buffer_setup_ops bmg160_buffer_setup_ops = {
- .preenable = bmg160_buffer_preenable,
- .postenable = iio_triggered_buffer_postenable,
- .predisable = iio_triggered_buffer_predisable,
- .postdisable = bmg160_buffer_postdisable,
-};
-
-static int bmg160_gpio_probe(struct bmg160_data *data)
-
-{
- struct device *dev;
- struct gpio_desc *gpio;
-
- dev = data->dev;
-
- /* data ready gpio interrupt pin */
- gpio = devm_gpiod_get_index(dev, BMG160_GPIO_NAME, 0, GPIOD_IN);
- if (IS_ERR(gpio)) {
- dev_err(dev, "acpi gpio get index failed\n");
- return PTR_ERR(gpio);
- }
-
- data->irq = gpiod_to_irq(gpio);
-
- dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio),
- data->irq);
-
- return 0;
-}
-
-static const char *bmg160_match_acpi_device(struct device *dev)
-{
- const struct acpi_device_id *id;
-
- id = acpi_match_device(dev->driver->acpi_match_table, dev);
- if (!id)
- return NULL;
-
- return dev_name(dev);
-}
-
-static int bmg160_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct bmg160_data *data;
- struct iio_dev *indio_dev;
- int ret;
- const char *name = NULL;
- struct regmap *regmap;
- struct device *dev = &client->dev;
-
- regmap = devm_regmap_init_i2c(client, &bmg160_regmap_i2c_conf);
- if (IS_ERR(regmap)) {
- dev_err(&client->dev, "Failed to register i2c regmap %d\n",
- (int)PTR_ERR(regmap));
- return PTR_ERR(regmap);
- }
-
- indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
- if (!indio_dev)
- return -ENOMEM;
-
- data = iio_priv(indio_dev);
- dev_set_drvdata(dev, indio_dev);
- data->dev = dev;
- data->irq = client->irq;
-
- ret = bmg160_chip_init(data);
- if (ret < 0)
- return ret;
-
- mutex_init(&data->mutex);
-
- if (id)
- name = id->name;
-
- if (ACPI_HANDLE(dev))
- name = bmg160_match_acpi_device(dev);
-
- indio_dev->dev.parent = dev;
- indio_dev->channels = bmg160_channels;
- indio_dev->num_channels = ARRAY_SIZE(bmg160_channels);
- indio_dev->name = name;
- indio_dev->modes = INDIO_DIRECT_MODE;
- indio_dev->info = &bmg160_info;
-
- if (data->irq <= 0)
- bmg160_gpio_probe(data);
-
- if (data->irq > 0) {
- ret = devm_request_threaded_irq(dev,
- data->irq,
- bmg160_data_rdy_trig_poll,
- bmg160_event_handler,
- IRQF_TRIGGER_RISING,
- BMG160_IRQ_NAME,
- indio_dev);
- if (ret)
- return ret;
-
- data->dready_trig = devm_iio_trigger_alloc(dev,
- "%s-dev%d",
- indio_dev->name,
- indio_dev->id);
- if (!data->dready_trig)
- return -ENOMEM;
-
- data->motion_trig = devm_iio_trigger_alloc(dev,
- "%s-any-motion-dev%d",
- indio_dev->name,
- indio_dev->id);
- if (!data->motion_trig)
- return -ENOMEM;
-
- data->dready_trig->dev.parent = dev;
- data->dready_trig->ops = &bmg160_trigger_ops;
- iio_trigger_set_drvdata(data->dready_trig, indio_dev);
- ret = iio_trigger_register(data->dready_trig);
- if (ret)
- return ret;
-
- data->motion_trig->dev.parent = dev;
- data->motion_trig->ops = &bmg160_trigger_ops;
- iio_trigger_set_drvdata(data->motion_trig, indio_dev);
- ret = iio_trigger_register(data->motion_trig);
- if (ret) {
- data->motion_trig = NULL;
- goto err_trigger_unregister;
- }
- }
-
- ret = iio_triggered_buffer_setup(indio_dev,
- iio_pollfunc_store_time,
- bmg160_trigger_handler,
- &bmg160_buffer_setup_ops);
- if (ret < 0) {
- dev_err(dev,
- "iio triggered buffer setup failed\n");
- goto err_trigger_unregister;
- }
-
- ret = iio_device_register(indio_dev);
- if (ret < 0) {
- dev_err(dev, "unable to register iio device\n");
- goto err_buffer_cleanup;
- }
-
- ret = pm_runtime_set_active(dev);
- if (ret)
- goto err_iio_unregister;
-
- pm_runtime_enable(dev);
- pm_runtime_set_autosuspend_delay(dev,
- BMG160_AUTO_SUSPEND_DELAY_MS);
- pm_runtime_use_autosuspend(dev);
-
- return 0;
-
-err_iio_unregister:
- iio_device_unregister(indio_dev);
-err_buffer_cleanup:
- iio_triggered_buffer_cleanup(indio_dev);
-err_trigger_unregister:
- if (data->dready_trig)
- iio_trigger_unregister(data->dready_trig);
- if (data->motion_trig)
- iio_trigger_unregister(data->motion_trig);
-
- return ret;
-}
-
-static int bmg160_remove(struct i2c_client *client)
-{
- struct iio_dev *indio_dev = i2c_get_clientdata(client);
- struct bmg160_data *data = iio_priv(indio_dev);
-
- pm_runtime_disable(&client->dev);
- pm_runtime_set_suspended(&client->dev);
- pm_runtime_put_noidle(&client->dev);
-
- iio_device_unregister(indio_dev);
- iio_triggered_buffer_cleanup(indio_dev);
-
- if (data->dready_trig) {
- iio_trigger_unregister(data->dready_trig);
- iio_trigger_unregister(data->motion_trig);
- }
-
- mutex_lock(&data->mutex);
- bmg160_set_mode(data, BMG160_MODE_DEEP_SUSPEND);
- mutex_unlock(&data->mutex);
-
- return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int bmg160_suspend(struct device *dev)
-{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- struct bmg160_data *data = iio_priv(indio_dev);
-
- mutex_lock(&data->mutex);
- bmg160_set_mode(data, BMG160_MODE_SUSPEND);
- mutex_unlock(&data->mutex);
-
- return 0;
-}
-
-static int bmg160_resume(struct device *dev)
-{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- struct bmg160_data *data = iio_priv(indio_dev);
-
- mutex_lock(&data->mutex);
- if (data->dready_trigger_on || data->motion_trigger_on ||
- data->ev_enable_state)
- bmg160_set_mode(data, BMG160_MODE_NORMAL);
- mutex_unlock(&data->mutex);
-
- return 0;
-}
-#endif
-
-#ifdef CONFIG_PM
-static int bmg160_runtime_suspend(struct device *dev)
-{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- struct bmg160_data *data = iio_priv(indio_dev);
- int ret;
-
- ret = bmg160_set_mode(data, BMG160_MODE_SUSPEND);
- if (ret < 0) {
- dev_err(data->dev, "set mode failed\n");
- return -EAGAIN;
- }
-
- return 0;
-}
-
-static int bmg160_runtime_resume(struct device *dev)
-{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- struct bmg160_data *data = iio_priv(indio_dev);
- int ret;
-
- ret = bmg160_set_mode(data, BMG160_MODE_NORMAL);
- if (ret < 0)
- return ret;
-
- msleep_interruptible(BMG160_MAX_STARTUP_TIME_MS);
-
- return 0;
-}
-#endif
-
-static const struct dev_pm_ops bmg160_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(bmg160_suspend, bmg160_resume)
- SET_RUNTIME_PM_OPS(bmg160_runtime_suspend,
- bmg160_runtime_resume, NULL)
-};
-
-static const struct acpi_device_id bmg160_acpi_match[] = {
- {"BMG0160", 0},
- {"BMI055B", 0},
- {},
-};
-
-MODULE_DEVICE_TABLE(acpi, bmg160_acpi_match);
-
-static const struct i2c_device_id bmg160_id[] = {
- {"bmg160", 0},
- {"bmi055_gyro", 0},
- {}
-};
-
-MODULE_DEVICE_TABLE(i2c, bmg160_id);
-
-static struct i2c_driver bmg160_driver = {
- .driver = {
- .name = BMG160_DRV_NAME,
- .acpi_match_table = ACPI_PTR(bmg160_acpi_match),
- .pm = &bmg160_pm_ops,
- },
- .probe = bmg160_probe,
- .remove = bmg160_remove,
- .id_table = bmg160_id,
-};
-module_i2c_driver(bmg160_driver);
-
-MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("BMG160 Gyro driver");
--- /dev/null
+#ifndef BMG160_H_
+#define BMG160_H_
+
+extern const struct dev_pm_ops bmg160_pm_ops;
+
+int bmg160_core_probe(struct device *dev, struct regmap *regmap, int irq,
+ const char *name);
+void bmg160_core_remove(struct device *dev);
+
+#endif /* BMG160_H_ */
--- /dev/null
+/*
+ * BMG160 Gyro Sensor driver
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/gpio/consumer.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/events.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/regmap.h>
+#include "bmg160.h"
+
+#define BMG160_IRQ_NAME "bmg160_event"
+#define BMG160_GPIO_NAME "gpio_int"
+
+#define BMG160_REG_CHIP_ID 0x00
+#define BMG160_CHIP_ID_VAL 0x0F
+
+#define BMG160_REG_PMU_LPW 0x11
+#define BMG160_MODE_NORMAL 0x00
+#define BMG160_MODE_DEEP_SUSPEND 0x20
+#define BMG160_MODE_SUSPEND 0x80
+
+#define BMG160_REG_RANGE 0x0F
+
+#define BMG160_RANGE_2000DPS 0
+#define BMG160_RANGE_1000DPS 1
+#define BMG160_RANGE_500DPS 2
+#define BMG160_RANGE_250DPS 3
+#define BMG160_RANGE_125DPS 4
+
+#define BMG160_REG_PMU_BW 0x10
+#define BMG160_NO_FILTER 0
+#define BMG160_DEF_BW 100
+
+#define BMG160_REG_INT_MAP_0 0x17
+#define BMG160_INT_MAP_0_BIT_ANY BIT(1)
+
+#define BMG160_REG_INT_MAP_1 0x18
+#define BMG160_INT_MAP_1_BIT_NEW_DATA BIT(0)
+
+#define BMG160_REG_INT_RST_LATCH 0x21
+#define BMG160_INT_MODE_LATCH_RESET 0x80
+#define BMG160_INT_MODE_LATCH_INT 0x0F
+#define BMG160_INT_MODE_NON_LATCH_INT 0x00
+
+#define BMG160_REG_INT_EN_0 0x15
+#define BMG160_DATA_ENABLE_INT BIT(7)
+
+#define BMG160_REG_INT_EN_1 0x16
+#define BMG160_INT1_BIT_OD BIT(1)
+
+#define BMG160_REG_XOUT_L 0x02
+#define BMG160_AXIS_TO_REG(axis) (BMG160_REG_XOUT_L + (axis * 2))
+
+#define BMG160_REG_SLOPE_THRES 0x1B
+#define BMG160_SLOPE_THRES_MASK 0x0F
+
+#define BMG160_REG_MOTION_INTR 0x1C
+#define BMG160_INT_MOTION_X BIT(0)
+#define BMG160_INT_MOTION_Y BIT(1)
+#define BMG160_INT_MOTION_Z BIT(2)
+#define BMG160_ANY_DUR_MASK 0x30
+#define BMG160_ANY_DUR_SHIFT 4
+
+#define BMG160_REG_INT_STATUS_2 0x0B
+#define BMG160_ANY_MOTION_MASK 0x07
+#define BMG160_ANY_MOTION_BIT_X BIT(0)
+#define BMG160_ANY_MOTION_BIT_Y BIT(1)
+#define BMG160_ANY_MOTION_BIT_Z BIT(2)
+
+#define BMG160_REG_TEMP 0x08
+#define BMG160_TEMP_CENTER_VAL 23
+
+#define BMG160_MAX_STARTUP_TIME_MS 80
+
+#define BMG160_AUTO_SUSPEND_DELAY_MS 2000
+
+struct bmg160_data {
+ struct device *dev;
+ struct regmap *regmap;
+ struct iio_trigger *dready_trig;
+ struct iio_trigger *motion_trig;
+ struct mutex mutex;
+ s16 buffer[8];
+ u8 bw_bits;
+ u32 dps_range;
+ int ev_enable_state;
+ int slope_thres;
+ bool dready_trigger_on;
+ bool motion_trigger_on;
+ int irq;
+};
+
+enum bmg160_axis {
+ AXIS_X,
+ AXIS_Y,
+ AXIS_Z,
+};
+
+static const struct {
+ int val;
+ int bw_bits;
+} bmg160_samp_freq_table[] = { {100, 0x07},
+ {200, 0x06},
+ {400, 0x03},
+ {1000, 0x02},
+ {2000, 0x01} };
+
+static const struct {
+ int scale;
+ int dps_range;
+} bmg160_scale_table[] = { { 1065, BMG160_RANGE_2000DPS},
+ { 532, BMG160_RANGE_1000DPS},
+ { 266, BMG160_RANGE_500DPS},
+ { 133, BMG160_RANGE_250DPS},
+ { 66, BMG160_RANGE_125DPS} };
+
+static int bmg160_set_mode(struct bmg160_data *data, u8 mode)
+{
+ int ret;
+
+ ret = regmap_write(data->regmap, BMG160_REG_PMU_LPW, mode);
+ if (ret < 0) {
+ dev_err(data->dev, "Error writing reg_pmu_lpw\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int bmg160_convert_freq_to_bit(int val)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(bmg160_samp_freq_table); ++i) {
+ if (bmg160_samp_freq_table[i].val == val)
+ return bmg160_samp_freq_table[i].bw_bits;
+ }
+
+ return -EINVAL;
+}
+
+static int bmg160_set_bw(struct bmg160_data *data, int val)
+{
+ int ret;
+ int bw_bits;
+
+ bw_bits = bmg160_convert_freq_to_bit(val);
+ if (bw_bits < 0)
+ return bw_bits;
+
+ ret = regmap_write(data->regmap, BMG160_REG_PMU_BW, bw_bits);
+ if (ret < 0) {
+ dev_err(data->dev, "Error writing reg_pmu_bw\n");
+ return ret;
+ }
+
+ data->bw_bits = bw_bits;
+
+ return 0;
+}
+
+static int bmg160_chip_init(struct bmg160_data *data)
+{
+ int ret;
+ unsigned int val;
+
+ ret = regmap_read(data->regmap, BMG160_REG_CHIP_ID, &val);
+ if (ret < 0) {
+ dev_err(data->dev, "Error reading reg_chip_id\n");
+ return ret;
+ }
+
+ dev_dbg(data->dev, "Chip Id %x\n", val);
+ if (val != BMG160_CHIP_ID_VAL) {
+ dev_err(data->dev, "invalid chip %x\n", val);
+ return -ENODEV;
+ }
+
+ ret = bmg160_set_mode(data, BMG160_MODE_NORMAL);
+ if (ret < 0)
+ return ret;
+
+ /* Wait upto 500 ms to be ready after changing mode */
+ usleep_range(500, 1000);
+
+ /* Set Bandwidth */
+ ret = bmg160_set_bw(data, BMG160_DEF_BW);
+ if (ret < 0)
+ return ret;
+
+ /* Set Default Range */
+ ret = regmap_write(data->regmap, BMG160_REG_RANGE, BMG160_RANGE_500DPS);
+ if (ret < 0) {
+ dev_err(data->dev, "Error writing reg_range\n");
+ return ret;
+ }
+ data->dps_range = BMG160_RANGE_500DPS;
+
+ ret = regmap_read(data->regmap, BMG160_REG_SLOPE_THRES, &val);
+ if (ret < 0) {
+ dev_err(data->dev, "Error reading reg_slope_thres\n");
+ return ret;
+ }
+ data->slope_thres = val;
+
+ /* Set default interrupt mode */
+ ret = regmap_update_bits(data->regmap, BMG160_REG_INT_EN_1,
+ BMG160_INT1_BIT_OD, 0);
+ if (ret < 0) {
+ dev_err(data->dev, "Error updating bits in reg_int_en_1\n");
+ return ret;
+ }
+
+ ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
+ BMG160_INT_MODE_LATCH_INT |
+ BMG160_INT_MODE_LATCH_RESET);
+ if (ret < 0) {
+ dev_err(data->dev,
+ "Error writing reg_motion_intr\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int bmg160_set_power_state(struct bmg160_data *data, bool on)
+{
+#ifdef CONFIG_PM
+ int ret;
+
+ if (on)
+ ret = pm_runtime_get_sync(data->dev);
+ else {
+ pm_runtime_mark_last_busy(data->dev);
+ ret = pm_runtime_put_autosuspend(data->dev);
+ }
+
+ if (ret < 0) {
+ dev_err(data->dev,
+ "Failed: bmg160_set_power_state for %d\n", on);
+ if (on)
+ pm_runtime_put_noidle(data->dev);
+
+ return ret;
+ }
+#endif
+
+ return 0;
+}
+
+static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
+ bool status)
+{
+ int ret;
+
+ /* Enable/Disable INT_MAP0 mapping */
+ ret = regmap_update_bits(data->regmap, BMG160_REG_INT_MAP_0,
+ BMG160_INT_MAP_0_BIT_ANY,
+ (status ? BMG160_INT_MAP_0_BIT_ANY : 0));
+ if (ret < 0) {
+ dev_err(data->dev, "Error updating bits reg_int_map0\n");
+ return ret;
+ }
+
+ /* Enable/Disable slope interrupts */
+ if (status) {
+ /* Update slope thres */
+ ret = regmap_write(data->regmap, BMG160_REG_SLOPE_THRES,
+ data->slope_thres);
+ if (ret < 0) {
+ dev_err(data->dev,
+ "Error writing reg_slope_thres\n");
+ return ret;
+ }
+
+ ret = regmap_write(data->regmap, BMG160_REG_MOTION_INTR,
+ BMG160_INT_MOTION_X | BMG160_INT_MOTION_Y |
+ BMG160_INT_MOTION_Z);
+ if (ret < 0) {
+ dev_err(data->dev,
+ "Error writing reg_motion_intr\n");
+ return ret;
+ }
+
+ /*
+ * New data interrupt is always non-latched,
+ * which will have higher priority, so no need
+ * to set latched mode, we will be flooded anyway with INTR
+ */
+ if (!data->dready_trigger_on) {
+ ret = regmap_write(data->regmap,
+ BMG160_REG_INT_RST_LATCH,
+ BMG160_INT_MODE_LATCH_INT |
+ BMG160_INT_MODE_LATCH_RESET);
+ if (ret < 0) {
+ dev_err(data->dev,
+ "Error writing reg_rst_latch\n");
+ return ret;
+ }
+ }
+
+ ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0,
+ BMG160_DATA_ENABLE_INT);
+
+ } else {
+ ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0, 0);
+ }
+
+ if (ret < 0) {
+ dev_err(data->dev, "Error writing reg_int_en0\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int bmg160_setup_new_data_interrupt(struct bmg160_data *data,
+ bool status)
+{
+ int ret;
+
+ /* Enable/Disable INT_MAP1 mapping */
+ ret = regmap_update_bits(data->regmap, BMG160_REG_INT_MAP_1,
+ BMG160_INT_MAP_1_BIT_NEW_DATA,
+ (status ? BMG160_INT_MAP_1_BIT_NEW_DATA : 0));
+ if (ret < 0) {
+ dev_err(data->dev, "Error updating bits in reg_int_map1\n");
+ return ret;
+ }
+
+ if (status) {
+ ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
+ BMG160_INT_MODE_NON_LATCH_INT |
+ BMG160_INT_MODE_LATCH_RESET);
+ if (ret < 0) {
+ dev_err(data->dev,
+ "Error writing reg_rst_latch\n");
+ return ret;
+ }
+
+ ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0,
+ BMG160_DATA_ENABLE_INT);
+
+ } else {
+ /* Restore interrupt mode */
+ ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
+ BMG160_INT_MODE_LATCH_INT |
+ BMG160_INT_MODE_LATCH_RESET);
+ if (ret < 0) {
+ dev_err(data->dev,
+ "Error writing reg_rst_latch\n");
+ return ret;
+ }
+
+ ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0, 0);
+ }
+
+ if (ret < 0) {
+ dev_err(data->dev, "Error writing reg_int_en0\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int bmg160_get_bw(struct bmg160_data *data, int *val)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(bmg160_samp_freq_table); ++i) {
+ if (bmg160_samp_freq_table[i].bw_bits == data->bw_bits) {
+ *val = bmg160_samp_freq_table[i].val;
+ return IIO_VAL_INT;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int bmg160_set_scale(struct bmg160_data *data, int val)
+{
+ int ret, i;
+
+ for (i = 0; i < ARRAY_SIZE(bmg160_scale_table); ++i) {
+ if (bmg160_scale_table[i].scale == val) {
+ ret = regmap_write(data->regmap, BMG160_REG_RANGE,
+ bmg160_scale_table[i].dps_range);
+ if (ret < 0) {
+ dev_err(data->dev,
+ "Error writing reg_range\n");
+ return ret;
+ }
+ data->dps_range = bmg160_scale_table[i].dps_range;
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int bmg160_get_temp(struct bmg160_data *data, int *val)
+{
+ int ret;
+ unsigned int raw_val;
+
+ mutex_lock(&data->mutex);
+ ret = bmg160_set_power_state(data, true);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+
+ ret = regmap_read(data->regmap, BMG160_REG_TEMP, &raw_val);
+ if (ret < 0) {
+ dev_err(data->dev, "Error reading reg_temp\n");
+ bmg160_set_power_state(data, false);
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+
+ *val = sign_extend32(raw_val, 7);
+ ret = bmg160_set_power_state(data, false);
+ mutex_unlock(&data->mutex);
+ if (ret < 0)
+ return ret;
+
+ return IIO_VAL_INT;
+}
+
+static int bmg160_get_axis(struct bmg160_data *data, int axis, int *val)
+{
+ int ret;
+ unsigned int raw_val;
+
+ mutex_lock(&data->mutex);
+ ret = bmg160_set_power_state(data, true);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+
+ ret = regmap_bulk_read(data->regmap, BMG160_AXIS_TO_REG(axis), &raw_val,
+ 2);
+ if (ret < 0) {
+ dev_err(data->dev, "Error reading axis %d\n", axis);
+ bmg160_set_power_state(data, false);
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+
+ *val = sign_extend32(raw_val, 15);
+ ret = bmg160_set_power_state(data, false);
+ mutex_unlock(&data->mutex);
+ if (ret < 0)
+ return ret;
+
+ return IIO_VAL_INT;
+}
+
+static int bmg160_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct bmg160_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_TEMP:
+ return bmg160_get_temp(data, val);
+ case IIO_ANGL_VEL:
+ if (iio_buffer_enabled(indio_dev))
+ return -EBUSY;
+ else
+ return bmg160_get_axis(data, chan->scan_index,
+ val);
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_OFFSET:
+ if (chan->type == IIO_TEMP) {
+ *val = BMG160_TEMP_CENTER_VAL;
+ return IIO_VAL_INT;
+ } else
+ return -EINVAL;
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ switch (chan->type) {
+ case IIO_TEMP:
+ *val2 = 500000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_ANGL_VEL:
+ {
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(bmg160_scale_table); ++i) {
+ if (bmg160_scale_table[i].dps_range ==
+ data->dps_range) {
+ *val2 = bmg160_scale_table[i].scale;
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ }
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ *val2 = 0;
+ mutex_lock(&data->mutex);
+ ret = bmg160_get_bw(data, val);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int bmg160_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct bmg160_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ mutex_lock(&data->mutex);
+ /*
+ * Section 4.2 of spec
+ * In suspend mode, the only supported operations are reading
+ * registers as well as writing to the (0x14) softreset
+ * register. Since we will be in suspend mode by default, change
+ * mode to power on for other writes.
+ */
+ ret = bmg160_set_power_state(data, true);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ ret = bmg160_set_bw(data, val);
+ if (ret < 0) {
+ bmg160_set_power_state(data, false);
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ ret = bmg160_set_power_state(data, false);
+ mutex_unlock(&data->mutex);
+ return ret;
+ case IIO_CHAN_INFO_SCALE:
+ if (val)
+ return -EINVAL;
+
+ mutex_lock(&data->mutex);
+ /* Refer to comments above for the suspend mode ops */
+ ret = bmg160_set_power_state(data, true);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ ret = bmg160_set_scale(data, val2);
+ if (ret < 0) {
+ bmg160_set_power_state(data, false);
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ ret = bmg160_set_power_state(data, false);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+
+ return -EINVAL;
+}
+
+static int bmg160_read_event(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 bmg160_data *data = iio_priv(indio_dev);
+
+ *val2 = 0;
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ *val = data->slope_thres & BMG160_SLOPE_THRES_MASK;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return IIO_VAL_INT;
+}
+
+static int bmg160_write_event(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 bmg160_data *data = iio_priv(indio_dev);
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ if (data->ev_enable_state)
+ return -EBUSY;
+ data->slope_thres &= ~BMG160_SLOPE_THRES_MASK;
+ data->slope_thres |= (val & BMG160_SLOPE_THRES_MASK);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int bmg160_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 bmg160_data *data = iio_priv(indio_dev);
+
+ return data->ev_enable_state;
+}
+
+static int bmg160_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 bmg160_data *data = iio_priv(indio_dev);
+ int ret;
+
+ if (state && data->ev_enable_state)
+ return 0;
+
+ mutex_lock(&data->mutex);
+
+ if (!state && data->motion_trigger_on) {
+ data->ev_enable_state = 0;
+ mutex_unlock(&data->mutex);
+ return 0;
+ }
+ /*
+ * We will expect the enable and disable to do operation in
+ * in reverse order. This will happen here anyway as our
+ * resume operation uses sync mode runtime pm calls, the
+ * suspend operation will be delayed by autosuspend delay
+ * So the disable operation will still happen in reverse of
+ * enable operation. When runtime pm is disabled the mode
+ * is always on so sequence doesn't matter
+ */
+ ret = bmg160_set_power_state(data, state);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+
+ ret = bmg160_setup_any_motion_interrupt(data, state);
+ if (ret < 0) {
+ bmg160_set_power_state(data, false);
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+
+ data->ev_enable_state = state;
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("100 200 400 1000 2000");
+
+static IIO_CONST_ATTR(in_anglvel_scale_available,
+ "0.001065 0.000532 0.000266 0.000133 0.000066");
+
+static struct attribute *bmg160_attributes[] = {
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ &iio_const_attr_in_anglvel_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group bmg160_attrs_group = {
+ .attrs = bmg160_attributes,
+};
+
+static const struct iio_event_spec bmg160_event = {
+ .type = IIO_EV_TYPE_ROC,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE)
+};
+
+#define BMG160_CHANNEL(_axis) { \
+ .type = IIO_ANGL_VEL, \
+ .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), \
+ .scan_index = AXIS_##_axis, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ }, \
+ .event_spec = &bmg160_event, \
+ .num_event_specs = 1 \
+}
+
+static const struct iio_chan_spec bmg160_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,
+ },
+ BMG160_CHANNEL(X),
+ BMG160_CHANNEL(Y),
+ BMG160_CHANNEL(Z),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const struct iio_info bmg160_info = {
+ .attrs = &bmg160_attrs_group,
+ .read_raw = bmg160_read_raw,
+ .write_raw = bmg160_write_raw,
+ .read_event_value = bmg160_read_event,
+ .write_event_value = bmg160_write_event,
+ .write_event_config = bmg160_write_event_config,
+ .read_event_config = bmg160_read_event_config,
+ .driver_module = THIS_MODULE,
+};
+
+static irqreturn_t bmg160_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct bmg160_data *data = iio_priv(indio_dev);
+ int bit, ret, i = 0;
+ unsigned int val;
+
+ mutex_lock(&data->mutex);
+ for_each_set_bit(bit, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ ret = regmap_bulk_read(data->regmap, BMG160_AXIS_TO_REG(bit),
+ &val, 2);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ goto err;
+ }
+ data->buffer[i++] = ret;
+ }
+ mutex_unlock(&data->mutex);
+
+ iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
+ pf->timestamp);
+err:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static int bmg160_trig_try_reen(struct iio_trigger *trig)
+{
+ struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+ struct bmg160_data *data = iio_priv(indio_dev);
+ int ret;
+
+ /* new data interrupts don't need ack */
+ if (data->dready_trigger_on)
+ return 0;
+
+ /* Set latched mode interrupt and clear any latched interrupt */
+ ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
+ BMG160_INT_MODE_LATCH_INT |
+ BMG160_INT_MODE_LATCH_RESET);
+ if (ret < 0) {
+ dev_err(data->dev, "Error writing reg_rst_latch\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int bmg160_data_rdy_trigger_set_state(struct iio_trigger *trig,
+ bool state)
+{
+ struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+ struct bmg160_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+
+ if (!state && data->ev_enable_state && data->motion_trigger_on) {
+ data->motion_trigger_on = false;
+ mutex_unlock(&data->mutex);
+ return 0;
+ }
+
+ /*
+ * Refer to comment in bmg160_write_event_config for
+ * enable/disable operation order
+ */
+ ret = bmg160_set_power_state(data, state);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ if (data->motion_trig == trig)
+ ret = bmg160_setup_any_motion_interrupt(data, state);
+ else
+ ret = bmg160_setup_new_data_interrupt(data, state);
+ if (ret < 0) {
+ bmg160_set_power_state(data, false);
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ if (data->motion_trig == trig)
+ data->motion_trigger_on = state;
+ else
+ data->dready_trigger_on = state;
+
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+static const struct iio_trigger_ops bmg160_trigger_ops = {
+ .set_trigger_state = bmg160_data_rdy_trigger_set_state,
+ .try_reenable = bmg160_trig_try_reen,
+ .owner = THIS_MODULE,
+};
+
+static irqreturn_t bmg160_event_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct bmg160_data *data = iio_priv(indio_dev);
+ int ret;
+ int dir;
+ unsigned int val;
+
+ ret = regmap_read(data->regmap, BMG160_REG_INT_STATUS_2, &val);
+ if (ret < 0) {
+ dev_err(data->dev, "Error reading reg_int_status2\n");
+ goto ack_intr_status;
+ }
+
+ if (val & 0x08)
+ dir = IIO_EV_DIR_RISING;
+ else
+ dir = IIO_EV_DIR_FALLING;
+
+ if (val & BMG160_ANY_MOTION_BIT_X)
+ iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ANGL_VEL,
+ 0,
+ IIO_MOD_X,
+ IIO_EV_TYPE_ROC,
+ dir),
+ iio_get_time_ns());
+ if (val & BMG160_ANY_MOTION_BIT_Y)
+ iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ANGL_VEL,
+ 0,
+ IIO_MOD_Y,
+ IIO_EV_TYPE_ROC,
+ dir),
+ iio_get_time_ns());
+ if (val & BMG160_ANY_MOTION_BIT_Z)
+ iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ANGL_VEL,
+ 0,
+ IIO_MOD_Z,
+ IIO_EV_TYPE_ROC,
+ dir),
+ iio_get_time_ns());
+
+ack_intr_status:
+ if (!data->dready_trigger_on) {
+ ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
+ BMG160_INT_MODE_LATCH_INT |
+ BMG160_INT_MODE_LATCH_RESET);
+ if (ret < 0)
+ dev_err(data->dev,
+ "Error writing reg_rst_latch\n");
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t bmg160_data_rdy_trig_poll(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct bmg160_data *data = iio_priv(indio_dev);
+
+ if (data->dready_trigger_on)
+ iio_trigger_poll(data->dready_trig);
+ else if (data->motion_trigger_on)
+ iio_trigger_poll(data->motion_trig);
+
+ if (data->ev_enable_state)
+ return IRQ_WAKE_THREAD;
+ else
+ return IRQ_HANDLED;
+
+}
+
+static int bmg160_buffer_preenable(struct iio_dev *indio_dev)
+{
+ struct bmg160_data *data = iio_priv(indio_dev);
+
+ return bmg160_set_power_state(data, true);
+}
+
+static int bmg160_buffer_postdisable(struct iio_dev *indio_dev)
+{
+ struct bmg160_data *data = iio_priv(indio_dev);
+
+ return bmg160_set_power_state(data, false);
+}
+
+static const struct iio_buffer_setup_ops bmg160_buffer_setup_ops = {
+ .preenable = bmg160_buffer_preenable,
+ .postenable = iio_triggered_buffer_postenable,
+ .predisable = iio_triggered_buffer_predisable,
+ .postdisable = bmg160_buffer_postdisable,
+};
+
+static int bmg160_gpio_probe(struct bmg160_data *data)
+
+{
+ struct device *dev;
+ struct gpio_desc *gpio;
+
+ dev = data->dev;
+
+ /* data ready gpio interrupt pin */
+ gpio = devm_gpiod_get_index(dev, BMG160_GPIO_NAME, 0, GPIOD_IN);
+ if (IS_ERR(gpio)) {
+ dev_err(dev, "acpi gpio get index failed\n");
+ return PTR_ERR(gpio);
+ }
+
+ data->irq = gpiod_to_irq(gpio);
+
+ dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio),
+ data->irq);
+
+ return 0;
+}
+
+static const char *bmg160_match_acpi_device(struct device *dev)
+{
+ const struct acpi_device_id *id;
+
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+ if (!id)
+ return NULL;
+
+ return dev_name(dev);
+}
+
+int bmg160_core_probe(struct device *dev, struct regmap *regmap, int irq,
+ const char *name)
+{
+ struct bmg160_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->dev = dev;
+ data->irq = irq;
+ data->regmap = regmap;
+
+ ret = bmg160_chip_init(data);
+ if (ret < 0)
+ return ret;
+
+ mutex_init(&data->mutex);
+
+ if (ACPI_HANDLE(dev))
+ name = bmg160_match_acpi_device(dev);
+
+ indio_dev->dev.parent = dev;
+ indio_dev->channels = bmg160_channels;
+ indio_dev->num_channels = ARRAY_SIZE(bmg160_channels);
+ indio_dev->name = name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &bmg160_info;
+
+ if (data->irq <= 0)
+ bmg160_gpio_probe(data);
+
+ if (data->irq > 0) {
+ ret = devm_request_threaded_irq(dev,
+ data->irq,
+ bmg160_data_rdy_trig_poll,
+ bmg160_event_handler,
+ IRQF_TRIGGER_RISING,
+ BMG160_IRQ_NAME,
+ indio_dev);
+ if (ret)
+ return ret;
+
+ data->dready_trig = devm_iio_trigger_alloc(dev,
+ "%s-dev%d",
+ indio_dev->name,
+ indio_dev->id);
+ if (!data->dready_trig)
+ return -ENOMEM;
+
+ data->motion_trig = devm_iio_trigger_alloc(dev,
+ "%s-any-motion-dev%d",
+ indio_dev->name,
+ indio_dev->id);
+ if (!data->motion_trig)
+ return -ENOMEM;
+
+ data->dready_trig->dev.parent = dev;
+ data->dready_trig->ops = &bmg160_trigger_ops;
+ iio_trigger_set_drvdata(data->dready_trig, indio_dev);
+ ret = iio_trigger_register(data->dready_trig);
+ if (ret)
+ return ret;
+
+ data->motion_trig->dev.parent = dev;
+ data->motion_trig->ops = &bmg160_trigger_ops;
+ iio_trigger_set_drvdata(data->motion_trig, indio_dev);
+ ret = iio_trigger_register(data->motion_trig);
+ if (ret) {
+ data->motion_trig = NULL;
+ goto err_trigger_unregister;
+ }
+ }
+
+ ret = iio_triggered_buffer_setup(indio_dev,
+ iio_pollfunc_store_time,
+ bmg160_trigger_handler,
+ &bmg160_buffer_setup_ops);
+ if (ret < 0) {
+ dev_err(dev,
+ "iio triggered buffer setup failed\n");
+ goto err_trigger_unregister;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0) {
+ dev_err(dev, "unable to register iio device\n");
+ goto err_buffer_cleanup;
+ }
+
+ ret = pm_runtime_set_active(dev);
+ if (ret)
+ goto err_iio_unregister;
+
+ pm_runtime_enable(dev);
+ pm_runtime_set_autosuspend_delay(dev,
+ BMG160_AUTO_SUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(dev);
+
+ return 0;
+
+err_iio_unregister:
+ iio_device_unregister(indio_dev);
+err_buffer_cleanup:
+ iio_triggered_buffer_cleanup(indio_dev);
+err_trigger_unregister:
+ if (data->dready_trig)
+ iio_trigger_unregister(data->dready_trig);
+ if (data->motion_trig)
+ iio_trigger_unregister(data->motion_trig);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(bmg160_core_probe);
+
+void bmg160_core_remove(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct bmg160_data *data = iio_priv(indio_dev);
+
+ pm_runtime_disable(dev);
+ pm_runtime_set_suspended(dev);
+ pm_runtime_put_noidle(dev);
+
+ iio_device_unregister(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+
+ if (data->dready_trig) {
+ iio_trigger_unregister(data->dready_trig);
+ iio_trigger_unregister(data->motion_trig);
+ }
+
+ mutex_lock(&data->mutex);
+ bmg160_set_mode(data, BMG160_MODE_DEEP_SUSPEND);
+ mutex_unlock(&data->mutex);
+}
+EXPORT_SYMBOL_GPL(bmg160_core_remove);
+
+#ifdef CONFIG_PM_SLEEP
+static int bmg160_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct bmg160_data *data = iio_priv(indio_dev);
+
+ mutex_lock(&data->mutex);
+ bmg160_set_mode(data, BMG160_MODE_SUSPEND);
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+static int bmg160_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct bmg160_data *data = iio_priv(indio_dev);
+
+ mutex_lock(&data->mutex);
+ if (data->dready_trigger_on || data->motion_trigger_on ||
+ data->ev_enable_state)
+ bmg160_set_mode(data, BMG160_MODE_NORMAL);
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM
+static int bmg160_runtime_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct bmg160_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = bmg160_set_mode(data, BMG160_MODE_SUSPEND);
+ if (ret < 0) {
+ dev_err(data->dev, "set mode failed\n");
+ return -EAGAIN;
+ }
+
+ return 0;
+}
+
+static int bmg160_runtime_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct bmg160_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = bmg160_set_mode(data, BMG160_MODE_NORMAL);
+ if (ret < 0)
+ return ret;
+
+ msleep_interruptible(BMG160_MAX_STARTUP_TIME_MS);
+
+ return 0;
+}
+#endif
+
+const struct dev_pm_ops bmg160_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(bmg160_suspend, bmg160_resume)
+ SET_RUNTIME_PM_OPS(bmg160_runtime_suspend,
+ bmg160_runtime_resume, NULL)
+};
+EXPORT_SYMBOL_GPL(bmg160_pm_ops);
+
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("BMG160 Gyro driver");
--- /dev/null
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+
+#include "bmg160.h"
+
+static const struct regmap_config bmg160_regmap_i2c_conf = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0x3f
+};
+
+static int bmg160_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct regmap *regmap;
+ const char *name = NULL;
+
+ regmap = devm_regmap_init_i2c(client, &bmg160_regmap_i2c_conf);
+ if (IS_ERR(regmap)) {
+ dev_err(&client->dev, "Failed to register i2c regmap %d\n",
+ (int)PTR_ERR(regmap));
+ return PTR_ERR(regmap);
+ }
+
+ if (id)
+ name = id->name;
+
+ return bmg160_core_probe(&client->dev, regmap, client->irq, name);
+}
+
+static int bmg160_i2c_remove(struct i2c_client *client)
+{
+ bmg160_core_remove(&client->dev);
+
+ return 0;
+}
+
+static const struct acpi_device_id bmg160_acpi_match[] = {
+ {"BMG0160", 0},
+ {"BMI055B", 0},
+ {},
+};
+
+MODULE_DEVICE_TABLE(acpi, bmg160_acpi_match);
+
+static const struct i2c_device_id bmg160_i2c_id[] = {
+ {"bmg160", 0},
+ {"bmi055_gyro", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, bmg160_i2c_id);
+
+static struct i2c_driver bmg160_i2c_driver = {
+ .driver = {
+ .name = "bmg160_i2c",
+ .acpi_match_table = ACPI_PTR(bmg160_acpi_match),
+ .pm = &bmg160_pm_ops,
+ },
+ .probe = bmg160_i2c_probe,
+ .remove = bmg160_i2c_remove,
+ .id_table = bmg160_i2c_id,
+};
+module_i2c_driver(bmg160_i2c_driver);
+
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("BMG160 I2C Gyro driver");
projects / firefly-linux-kernel-4.4.55.git / commitdiff