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Fri, 24 Sep 2021 12:32:13 +0000 From: Baptiste Mansuy To: jic23@kernel.org, lars@metafoo.de Cc: linux-iio@vger.kernel.org, Baptiste Mansuy Subject: [PATCH v2] iio: imu: mpu6050: add watermark support for icm20602/20690 Date: Fri, 24 Sep 2021 14:31:24 +0200 Message-Id: <20210924123124.25831-1-bmansuy@invensense.com> X-Mailer: git-send-email 2.25.1 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: LO4P123CA0111.GBRP123.PROD.OUTLOOK.COM (2603:10a6:600:192::8) To BYAPR12MB2901.namprd12.prod.outlook.com (2603:10b6:a03:138::32) MIME-Version: 1.0 Received: from FRGNB-2THMRC2.invcorp.invensense.com (77.157.193.39) by LO4P123CA0111.GBRP123.PROD.OUTLOOK.COM (2603:10a6:600:192::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4544.15 via Frontend Transport; Fri, 24 Sep 2021 12:32:12 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: d8392e37-9644-4b6f-3eee-08d97f5755e9 X-MS-TrafficTypeDiagnostic: BY5PR12MB5016: X-LD-Processed: 462b3b3b-e42b-47ea-801a-f1581aac892d,ExtFwd X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:751; 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This allows the use of the watermark interrupt with the posibility to change it's size. Change the timestamp computation to be used with the watermark. Add the set_watermark and flush callbacks according to the iio description. Signed-off-by: Baptiste Mansuy --- V1 -> V2: Changed watermark computation following the latest ABI drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 195 +++++++++++++++++- drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h | 23 ++- drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c | 138 ++++++++++--- drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c | 24 ++- 4 files changed, 339 insertions(+), 41 deletions(-) diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c index 597768c..2f70991 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c @@ -47,7 +47,9 @@ static const struct inv_mpu6050_reg_map reg_set_icm20602 = { .raw_accl = INV_MPU6050_REG_RAW_ACCEL, .temperature = INV_MPU6050_REG_TEMPERATURE, .int_enable = INV_MPU6050_REG_INT_ENABLE, - .int_status = INV_MPU6050_REG_INT_STATUS, + .int_status = INV_ICM20602_REG_FIFO_WM_INT_STATUS, + .wm_th_hb = INV_ICM20602_FIFO_WM_TH_HB, + .wm_th_lb = INV_ICM20602_FIFO_WM_TH_LB, .pwr_mgmt_1 = INV_MPU6050_REG_PWR_MGMT_1, .pwr_mgmt_2 = INV_MPU6050_REG_PWR_MGMT_2, .int_pin_cfg = INV_MPU6050_REG_INT_PIN_CFG, @@ -56,6 +58,31 @@ static const struct inv_mpu6050_reg_map reg_set_icm20602 = { .i2c_if = INV_ICM20602_REG_I2C_IF, }; +static const struct inv_mpu6050_reg_map reg_set_icm20690 = { + .sample_rate_div = INV_MPU6050_REG_SAMPLE_RATE_DIV, + .lpf = INV_MPU6050_REG_CONFIG, + .accel_lpf = INV_MPU6500_REG_ACCEL_CONFIG_2, + .user_ctrl = INV_MPU6050_REG_USER_CTRL, + .fifo_en = INV_MPU6050_REG_FIFO_EN, + .gyro_config = INV_MPU6050_REG_GYRO_CONFIG, + .accl_config = INV_MPU6050_REG_ACCEL_CONFIG, + .fifo_count_h = INV_MPU6050_REG_FIFO_COUNT_H, + .fifo_r_w = INV_MPU6050_REG_FIFO_R_W, + .raw_gyro = INV_MPU6050_REG_RAW_GYRO, + .raw_accl = INV_MPU6050_REG_RAW_ACCEL, + .temperature = INV_MPU6050_REG_TEMPERATURE, + .int_enable = INV_MPU6050_REG_INT_ENABLE, + .int_status = INV_ICM20602_REG_FIFO_WM_INT_STATUS, + .wm_th_hb = INV_ICM20690_FIFO_WM_TH_HB, + .wm_th_lb = INV_ICM20690_FIFO_WM_TH_LB, + .pwr_mgmt_1 = INV_MPU6050_REG_PWR_MGMT_1, + .pwr_mgmt_2 = INV_MPU6050_REG_PWR_MGMT_2, + .int_pin_cfg = INV_MPU6050_REG_INT_PIN_CFG, + .accl_offset = INV_MPU6500_REG_ACCEL_OFFSET, + .gyro_offset = INV_MPU6050_REG_GYRO_OFFSET, + .i2c_if = 0, +}; + static const struct inv_mpu6050_reg_map reg_set_6500 = { .sample_rate_div = INV_MPU6050_REG_SAMPLE_RATE_DIV, .lpf = INV_MPU6050_REG_CONFIG, @@ -115,6 +142,8 @@ static const struct inv_mpu6050_chip_config chip_config_6050 = { .magn_fifo_enable = false, .accl_fs = INV_MPU6050_FS_02G, .user_ctrl = 0, + .wm_val = 1, + .wm_size = 0, }; static const struct inv_mpu6050_chip_config chip_config_6500 = { @@ -132,6 +161,8 @@ static const struct inv_mpu6050_chip_config chip_config_6500 = { .magn_fifo_enable = false, .accl_fs = INV_MPU6050_FS_02G, .user_ctrl = 0, + .wm_val = 1, + .wm_size = 0, }; /* Indexed by enum inv_devices */ @@ -247,7 +278,7 @@ static const struct inv_mpu6050_hw hw_info[] = { { .whoami = INV_ICM20690_WHOAMI_VALUE, .name = "ICM20690", - .reg = ®_set_6500, + .reg = ®_set_icm20690, .config = &chip_config_6500, .fifo_size = 1024, .temp = {INV_ICM20608_TEMP_OFFSET, INV_ICM20608_TEMP_SCALE}, @@ -264,6 +295,53 @@ static const struct inv_mpu6050_hw hw_info[] = { }, }; +unsigned int inv_mpu6050_get_sample_size(struct inv_mpu6050_state *st) +{ + unsigned int nb_byte; + + nb_byte = 0; + if (st->chip_config.gyro_en) + nb_byte += INV_MPU6050_BYTES_PER_3AXIS_SENSOR; + if (st->chip_config.accl_en) + nb_byte += INV_MPU6050_BYTES_PER_3AXIS_SENSOR; + if (st->chip_config.magn_en) + nb_byte += INV_MPU9X50_BYTES_MAGN; + if (st->chip_config.temp_en) + nb_byte += INV_MPU6050_BYTES_PER_TEMP_SENSOR; + + return nb_byte; +} + +int inv_mpu6050_compute_hw_watermark(struct inv_mpu6050_state *st, unsigned int val) +{ + unsigned int nb_byte, new_size_byte; + int ret; + + nb_byte = inv_mpu6050_get_sample_size(st); + + /* + * Compute watermark size. + * + * Use a threshold when watermark size is not supported by the chip + * to prevent overwriting the first samples of the fifo. + * The threshold creates latency for the computing of the interrupt. + * When using a sampling frequency of 500Hz, the max latency is 12ms. + */ + new_size_byte = val * nb_byte; + if (new_size_byte > st->hw->fifo_size) { + val = ((st->hw->fifo_size * 7) / 8) / nb_byte; + new_size_byte = val * nb_byte; + } + + ret = inv_mpu6050_set_hw_watermark(st, new_size_byte); + if (ret) + return ret; + + st->chip_config.wm_val = val; + + return 0; +} + static int inv_mpu6050_pwr_mgmt_1_write(struct inv_mpu6050_state *st, bool sleep, int clock, int temp_dis) { @@ -1018,6 +1096,70 @@ static ssize_t inv_attr_show(struct device *dev, struct device_attribute *attr, } } +/* + * inv_mpu6050_get_fifo_watermark_max() - Get the max watermark size of current chip. + */ + +static ssize_t +inv_mpu6050_get_fifo_watermark_max(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct inv_mpu6050_state *st = iio_priv(dev_to_iio_dev(dev)); + unsigned int nb_byte; + size_t watermark_max_size; + + mutex_lock(&st->lock); + nb_byte = inv_mpu6050_get_sample_size(st); + + /* Use default value of accel + gyro + temp sample */ + if (nb_byte == 0) + nb_byte = 2 * INV_MPU6050_BYTES_PER_3AXIS_SENSOR + + INV_MPU6050_BYTES_PER_TEMP_SENSOR; + watermark_max_size = st->hw->fifo_size / nb_byte; + mutex_unlock(&st->lock); + + return scnprintf(buf, PAGE_SIZE, "%zu\n", watermark_max_size); +} + +/* + * inv_mpu6050_get_fifo_state() - Get the state of the hwfifo. + * + * Watermark is disabled when the watermark size is set to 0 + */ + +static ssize_t +inv_mpu6050_get_fifo_state(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct inv_mpu6050_state *st = iio_priv(dev_to_iio_dev(dev)); + unsigned int fifo_state = 0; + + mutex_lock(&st->lock); + if (st->chip_config.wm_size > 0) + fifo_state = 1; + mutex_unlock(&st->lock); + + return scnprintf(buf, PAGE_SIZE, "%u\n", fifo_state); +} + +/* + * inv_mpu6050_get_fifo_watermark() - Get the current watermark size. + */ + +static ssize_t +inv_mpu6050_get_fifo_watermark(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct inv_mpu6050_state *st = iio_priv(dev_to_iio_dev(dev)); + unsigned int watermark; + + mutex_lock(&st->lock); + watermark = st->chip_config.wm_size; + mutex_unlock(&st->lock); + + return scnprintf(buf, PAGE_SIZE, "%u\n", watermark); +} + /** * inv_mpu6050_validate_trigger() - validate_trigger callback for invensense * MPU6050 device. @@ -1258,6 +1400,14 @@ static IIO_DEVICE_ATTR(in_gyro_matrix, S_IRUGO, inv_attr_show, NULL, static IIO_DEVICE_ATTR(in_accel_matrix, S_IRUGO, inv_attr_show, NULL, ATTR_ACCL_MATRIX); +static IIO_CONST_ATTR(hwfifo_watermark_min, "1"); +static IIO_DEVICE_ATTR(hwfifo_watermark_max, S_IRUGO, + inv_mpu6050_get_fifo_watermark_max, NULL, 0); +static IIO_DEVICE_ATTR(hwfifo_enabled, S_IRUGO, + inv_mpu6050_get_fifo_state, NULL, 0); +static IIO_DEVICE_ATTR(hwfifo_watermark, S_IRUGO, + inv_mpu6050_get_fifo_watermark, NULL, 0); + static struct attribute *inv_attributes[] = { &iio_dev_attr_in_gyro_matrix.dev_attr.attr, /* deprecated */ &iio_dev_attr_in_accel_matrix.dev_attr.attr, /* deprecated */ @@ -1265,6 +1415,10 @@ static struct attribute *inv_attributes[] = { &iio_const_attr_sampling_frequency_available.dev_attr.attr, &iio_const_attr_in_accel_scale_available.dev_attr.attr, &iio_const_attr_in_anglvel_scale_available.dev_attr.attr, + &iio_const_attr_hwfifo_watermark_min.dev_attr.attr, + &iio_dev_attr_hwfifo_watermark_max.dev_attr.attr, + &iio_dev_attr_hwfifo_watermark.dev_attr.attr, + &iio_dev_attr_hwfifo_enabled.dev_attr.attr, NULL, }; @@ -1290,6 +1444,39 @@ static int inv_mpu6050_reg_access(struct iio_dev *indio_dev, return ret; } +static int inv_mpu6050_set_watermark(struct iio_dev *indio_dev, unsigned int val) +{ + struct inv_mpu6050_state *st = iio_priv(indio_dev); + int ret; + + switch (st->chip_type) { + case INV_ICM20602: + case INV_ICM20690: + mutex_lock(&st->lock); + ret = inv_mpu6050_compute_hw_watermark(st, val); + mutex_unlock(&st->lock); + break; + default: + ret = 0; + break; + } + + return ret; +} + +static int inv_mpu6050_hw_flush_to_buffer(struct iio_dev *indio_dev, + unsigned int count) +{ + struct inv_mpu6050_state *st = iio_priv(indio_dev); + int ret; + + mutex_lock(&st->lock); + ret = inv_mpu6050_flush_fifo(indio_dev, 0, count); + mutex_unlock(&st->lock); + + return ret; +} + static const struct iio_info mpu_info = { .read_raw = &inv_mpu6050_read_raw, .write_raw = &inv_mpu6050_write_raw, @@ -1297,6 +1484,8 @@ static const struct iio_info mpu_info = { .attrs = &inv_attribute_group, .validate_trigger = inv_mpu6050_validate_trigger, .debugfs_reg_access = &inv_mpu6050_reg_access, + .hwfifo_set_watermark = &inv_mpu6050_set_watermark, + .hwfifo_flush_to_buffer = &inv_mpu6050_hw_flush_to_buffer, }; /* @@ -1618,7 +1807,7 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name, */ result = devm_iio_triggered_buffer_setup(dev, indio_dev, iio_pollfunc_store_time, - inv_mpu6050_read_fifo, + inv_mpu6050_interrupt_handler, NULL); if (result) { dev_err(dev, "configure buffer fail %d\n", result); diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h index c6aa36e..660ebda 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h @@ -57,6 +57,8 @@ struct inv_mpu6050_reg_map { u8 temperature; u8 int_enable; u8 int_status; + u8 wm_th_hb; + u8 wm_th_lb; u8 pwr_mgmt_1; u8 pwr_mgmt_2; u8 int_pin_cfg; @@ -105,6 +107,8 @@ enum inv_devices { * @temp_fifo_enable: enable temp data output * @magn_fifo_enable: enable magn data output * @divider: chip sample rate divider (sample rate divider - 1) + * @wm_val: watermark size in number of data + * @wm_size: watermark size in bytes */ struct inv_mpu6050_chip_config { unsigned int clk:3; @@ -121,6 +125,8 @@ struct inv_mpu6050_chip_config { unsigned int magn_fifo_enable:1; u8 divider; u8 user_ctrl; + unsigned int wm_val; + unsigned int wm_size; }; /* @@ -264,8 +270,19 @@ struct inv_mpu6050_state { #define INV_MPU6050_BIT_FIFO_OVERFLOW_INT 0x10 #define INV_MPU6050_BIT_RAW_DATA_RDY_INT 0x01 +#define INV_ICM20602_REG_FIFO_WM_INT_STATUS 0x39 +#define INV_ICM20602_BIT_FIFO_WM_INT 0x40 + #define INV_MPU6050_REG_EXT_SENS_DATA 0x49 +#define INV_ICM20602_FIFO_WM_TH_HB 0x60 +#define INV_ICM20602_BITS_FIFO_WM_TH_HB 0x03 +#define INV_ICM20602_FIFO_WM_TH_LB 0x61 + +#define INV_ICM20690_FIFO_WM_TH_HB 0x5E +#define INV_ICM20690_BITS_FIFO_WM_TH_HB 0x03 +#define INV_ICM20690_FIFO_WM_TH_LB 0x61 + /* I2C slaves data output from 0 to 3 */ #define INV_MPU6050_REG_I2C_SLV_DO(_x) (0x63 + (_x)) @@ -338,7 +355,6 @@ struct inv_mpu6050_state { #define INV_ICM20690_GYRO_STARTUP_TIME 80 #define INV_ICM20690_ACCEL_STARTUP_TIME 10 - /* delay time in microseconds */ #define INV_MPU6050_REG_UP_TIME_MIN 5000 #define INV_MPU6050_REG_UP_TIME_MAX 10000 @@ -457,7 +473,7 @@ enum inv_mpu6050_clock_sel_e { NUM_CLK }; -irqreturn_t inv_mpu6050_read_fifo(int irq, void *p); +irqreturn_t inv_mpu6050_interrupt_handler(int irq, void *p); int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev, int irq_type); int inv_mpu6050_prepare_fifo(struct inv_mpu6050_state *st, bool enable); int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, @@ -468,5 +484,8 @@ void inv_mpu_acpi_delete_mux_client(struct i2c_client *client); int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name, int (*inv_mpu_bus_setup)(struct iio_dev *), int chip_type); extern const struct dev_pm_ops inv_mpu_pmops; +int inv_mpu6050_set_hw_watermark(struct inv_mpu6050_state *st, unsigned int wm_size_byte); +int inv_mpu6050_compute_hw_watermark(struct inv_mpu6050_state *st, unsigned int wm_size_byte); +int inv_mpu6050_flush_fifo(struct iio_dev *indio_dev, s64 timestamp_val, unsigned int count); #endif diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c index 45c3752..4c558cf 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c @@ -40,15 +40,16 @@ static void inv_mpu6050_update_period(struct inv_mpu6050_state *st, if (st->it_timestamp == 0) { /* not initialized, forced to use it_timestamp */ use_it_timestamp = true; - } else if (nb == 1) { + } else if (nb == st->chip_config.wm_val) { /* * Validate the use of it timestamp by checking if interrupt * has been delayed. - * nb > 1 means interrupt was delayed for more than 1 sample, + * nb > wm_val means interrupt was delayed for more than 1 sample, * so it's obviously not good. + * If watermark does not exist for the chip, wm_val = 1. * Compute the chip period between 2 interrupts for validating. */ - delta = div_s64(timestamp - st->it_timestamp, divider); + delta = div_s64(timestamp - st->it_timestamp, divider) / st->chip_config.wm_val; if (delta > period_min && delta < period_max) { /* update chip period and use it timestamp */ st->chip_period = (st->chip_period + delta) / 2; @@ -89,6 +90,25 @@ static s64 inv_mpu6050_get_timestamp(struct inv_mpu6050_state *st) return ts; } +int inv_mpu6050_set_hw_watermark(struct inv_mpu6050_state *st, unsigned int size) +{ + int ret; + + if (size == st->chip_config.wm_size) + return 0; + + ret = regmap_write(st->map, st->reg->wm_th_hb, (size >> 8) & 0xFF); + if (ret) + return ret; + + ret = regmap_write(st->map, st->reg->wm_th_lb, size & 0xFF); + if (ret) + return ret; + + st->chip_config.wm_size = size; + return 0; +} + static int inv_reset_fifo(struct iio_dev *indio_dev) { int result; @@ -104,43 +124,44 @@ static int inv_reset_fifo(struct iio_dev *indio_dev) reset_fifo_fail: dev_err(regmap_get_device(st->map), "reset fifo failed %d\n", result); - result = regmap_write(st->map, st->reg->int_enable, - INV_MPU6050_BIT_DATA_RDY_EN); - + switch (st->chip_type) { + case INV_ICM20602: + case INV_ICM20690: + return inv_mpu6050_set_hw_watermark(st, st->chip_config.wm_size); + default: + return regmap_write(st->map, st->reg->int_enable, + INV_MPU6050_BIT_DATA_RDY_EN); + } return result; } -/* - * inv_mpu6050_read_fifo() - Transfer data from hardware FIFO to KFIFO. +/** + * inv_mpu6050_flush_fifo() - Flush fifo + * + * @indio_dev: Device driver instance. + * @timestamp_val: the interrupt timestamp + * @count: Number of data to flush + * + * This function flushes the fifo using count as the number of data to flush. + * As fifo_size may differ according to the chip unsigned + * count = 0 is used to set the max size of the fifo for count. */ -irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) + +int inv_mpu6050_flush_fifo(struct iio_dev *indio_dev, + s64 timestamp_val, unsigned int count) { - struct iio_poll_func *pf = p; - struct iio_dev *indio_dev = pf->indio_dev; struct inv_mpu6050_state *st = iio_priv(indio_dev); - size_t bytes_per_datum; - int result; u16 fifo_count; s64 timestamp; - int int_status; + int result; size_t i, nb; - - mutex_lock(&st->lock); - - /* ack interrupt and check status */ - result = regmap_read(st->map, st->reg->int_status, &int_status); - if (result) { - dev_err(regmap_get_device(st->map), - "failed to ack interrupt\n"); - goto flush_fifo; - } - if (!(int_status & INV_MPU6050_BIT_RAW_DATA_RDY_INT)) - goto end_session; + size_t bytes_per_datum; if (!(st->chip_config.accl_fifo_enable | st->chip_config.gyro_fifo_enable | st->chip_config.magn_fifo_enable)) - goto end_session; + return 0; + bytes_per_datum = 0; if (st->chip_config.accl_fifo_enable) bytes_per_datum += INV_MPU6050_BYTES_PER_3AXIS_SENSOR; @@ -161,7 +182,7 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) result = regmap_bulk_read(st->map, st->reg->fifo_count_h, st->data, INV_MPU6050_FIFO_COUNT_BYTE); if (result) - goto end_session; + return 0; fifo_count = be16_to_cpup((__be16 *)&st->data[0]); /* @@ -171,18 +192,30 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) */ nb = 3 * bytes_per_datum; if (fifo_count >= st->hw->fifo_size - nb) { - dev_warn(regmap_get_device(st->map), "fifo overflow reset\n"); - goto flush_fifo; + dev_warn(regmap_get_device(st->map), "fifo overflow\n"); + inv_reset_fifo(indio_dev); + return -1; } /* compute and process all complete datum */ nb = fifo_count / bytes_per_datum; - inv_mpu6050_update_period(st, pf->timestamp, nb); + /* + * As fifo_size may differ according to the chip unsigned + * count = 0 is used to choose the max value for count + */ + if (count == 0) + count = st->hw->fifo_size / bytes_per_datum; + if (timestamp_val != 0) + inv_mpu6050_update_period(st, timestamp_val, nb); + nb = min(nb, count); for (i = 0; i < nb; ++i) { result = regmap_noinc_read(st->map, st->reg->fifo_r_w, st->data, bytes_per_datum); - if (result) - goto flush_fifo; + if (result) { + inv_reset_fifo(indio_dev); + return result; + } + /* skip first samples if needed */ if (st->skip_samples) { st->skip_samples--; @@ -192,6 +225,45 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) iio_push_to_buffers_with_timestamp(indio_dev, st->data, timestamp); } + return i; +} + +/* + * inv_mpu6050_interrupt_handler() - Transfer data from hardware FIFO to KFIFO. + */ +irqreturn_t inv_mpu6050_interrupt_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct inv_mpu6050_state *st = iio_priv(indio_dev); + int result; + int int_status; + int int_status_bit; + + mutex_lock(&st->lock); + + /* ack interrupt and check status */ + result = regmap_read(st->map, st->reg->int_status, &int_status); + if (result) { + dev_err(regmap_get_device(st->map), + "failed to ack interrupt\n"); + goto flush_fifo; + } + + switch (st->chip_type) { + case INV_ICM20602: + case INV_ICM20690: + int_status_bit = INV_ICM20602_BIT_FIFO_WM_INT; + break; + default: + int_status_bit = INV_MPU6050_BIT_RAW_DATA_RDY_INT; + break; + } + if (!(int_status & int_status_bit)) + goto end_session; + + inv_mpu6050_flush_fifo(indio_dev, pf->timestamp, 0); + end_session: mutex_unlock(&st->lock); iio_trigger_notify_done(indio_dev->trig); diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c index 8825468..c685ed4 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c @@ -131,10 +131,28 @@ int inv_mpu6050_prepare_fifo(struct inv_mpu6050_state *st, bool enable) if (ret) return ret; /* enable interrupt */ - ret = regmap_write(st->map, st->reg->int_enable, - INV_MPU6050_BIT_DATA_RDY_EN); + switch (st->chip_type) { + case INV_ICM20602: + case INV_ICM20690: + /* watermark interrupt is enabled by setting the watermark value */ + ret = inv_mpu6050_compute_hw_watermark(st, st->chip_config.wm_val); + break; + default: + ret = regmap_write(st->map, st->reg->int_enable, + INV_MPU6050_BIT_DATA_RDY_EN); + break; + } } else { - ret = regmap_write(st->map, st->reg->int_enable, 0); + switch (st->chip_type) { + case INV_ICM20602: + case INV_ICM20690: + /* watermark interrupt is disabled by setting the watermark value to 0 */ + ret = inv_mpu6050_set_hw_watermark(st, 0); + break; + default: + ret = regmap_write(st->map, st->reg->int_enable, 0); + break; + } if (ret) return ret; ret = regmap_write(st->map, st->reg->fifo_en, 0); -- 2.25.1