iio: imu: inv_mpu6050: use runtime pm with autosuspend
Use runtime power management for handling chip power and sensor engines on/off. Simplifies things a lot since pm runtime already has reference counter. Usage of autosuspend reduces the number of power on/off. This makes polling interface now usable to get data at low frequency. Signed-off-by: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Jean-Baptiste Maneyrol
Jonathan Cameron
parent
5e95ca3637
commit
4599cac846
3 changed files with 196 additions and 112 deletions
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@ -16,6 +16,8 @@
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#include <linux/acpi.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/consumer.h>
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#include <linux/pm.h>
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#include <linux/pm_runtime.h>
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#include "inv_mpu_iio.h"
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#include "inv_mpu_magn.h"
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@ -396,30 +398,18 @@ int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en,
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return 0;
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}
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int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, bool power_on)
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static int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st,
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bool power_on)
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{
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int result;
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if (power_on) {
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if (!st->powerup_count) {
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result = inv_mpu6050_pwr_mgmt_1_write(st, false, -1, -1);
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if (result)
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return result;
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usleep_range(INV_MPU6050_REG_UP_TIME_MIN,
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INV_MPU6050_REG_UP_TIME_MAX);
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}
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st->powerup_count++;
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} else {
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if (st->powerup_count == 1) {
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result = inv_mpu6050_pwr_mgmt_1_write(st, true, -1, -1);
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if (result)
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return result;
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}
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st->powerup_count--;
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}
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result = inv_mpu6050_pwr_mgmt_1_write(st, !power_on, -1, -1);
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if (result)
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return result;
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dev_dbg(regmap_get_device(st->map), "set power %d, count=%u\n",
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power_on, st->powerup_count);
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if (power_on)
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usleep_range(INV_MPU6050_REG_UP_TIME_MIN,
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INV_MPU6050_REG_UP_TIME_MAX);
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return 0;
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}
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@ -563,6 +553,7 @@ static int inv_mpu6050_read_channel_data(struct iio_dev *indio_dev,
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int *val)
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{
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struct inv_mpu6050_state *st = iio_priv(indio_dev);
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struct device *pdev = regmap_get_device(st->map);
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unsigned int freq_hz, period_us, min_sleep_us, max_sleep_us;
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int result;
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int ret;
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@ -571,92 +562,85 @@ static int inv_mpu6050_read_channel_data(struct iio_dev *indio_dev,
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freq_hz = INV_MPU6050_DIVIDER_TO_FIFO_RATE(st->chip_config.divider);
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period_us = 1000000 / freq_hz;
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result = inv_mpu6050_set_power_itg(st, true);
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if (result)
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result = pm_runtime_get_sync(pdev);
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if (result < 0) {
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pm_runtime_put_noidle(pdev);
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return result;
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}
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switch (chan->type) {
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case IIO_ANGL_VEL:
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result = inv_mpu6050_switch_engine(st, true,
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INV_MPU6050_SENSOR_GYRO);
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if (result)
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goto error_power_off;
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/* need to wait 2 periods to have first valid sample */
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min_sleep_us = 2 * period_us;
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max_sleep_us = 2 * (period_us + period_us / 2);
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usleep_range(min_sleep_us, max_sleep_us);
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if (!st->chip_config.gyro_en) {
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result = inv_mpu6050_switch_engine(st, true,
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INV_MPU6050_SENSOR_GYRO);
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if (result)
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goto error_power_off;
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/* need to wait 2 periods to have first valid sample */
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min_sleep_us = 2 * period_us;
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max_sleep_us = 2 * (period_us + period_us / 2);
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usleep_range(min_sleep_us, max_sleep_us);
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}
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ret = inv_mpu6050_sensor_show(st, st->reg->raw_gyro,
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chan->channel2, val);
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result = inv_mpu6050_switch_engine(st, false,
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INV_MPU6050_SENSOR_GYRO);
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if (result)
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goto error_power_off;
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break;
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case IIO_ACCEL:
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result = inv_mpu6050_switch_engine(st, true,
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INV_MPU6050_SENSOR_ACCL);
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if (result)
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goto error_power_off;
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/* wait 1 period for first sample availability */
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min_sleep_us = period_us;
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max_sleep_us = period_us + period_us / 2;
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usleep_range(min_sleep_us, max_sleep_us);
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if (!st->chip_config.accl_en) {
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result = inv_mpu6050_switch_engine(st, true,
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INV_MPU6050_SENSOR_ACCL);
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if (result)
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goto error_power_off;
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/* wait 1 period for first sample availability */
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min_sleep_us = period_us;
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max_sleep_us = period_us + period_us / 2;
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usleep_range(min_sleep_us, max_sleep_us);
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}
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ret = inv_mpu6050_sensor_show(st, st->reg->raw_accl,
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chan->channel2, val);
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result = inv_mpu6050_switch_engine(st, false,
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INV_MPU6050_SENSOR_ACCL);
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if (result)
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goto error_power_off;
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break;
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case IIO_TEMP:
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result = inv_mpu6050_switch_engine(st, true,
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INV_MPU6050_SENSOR_TEMP);
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if (result)
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goto error_power_off;
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/* wait 1 period for first sample availability */
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min_sleep_us = period_us;
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max_sleep_us = period_us + period_us / 2;
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usleep_range(min_sleep_us, max_sleep_us);
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if (!st->chip_config.temp_en) {
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result = inv_mpu6050_switch_engine(st, true,
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INV_MPU6050_SENSOR_TEMP);
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if (result)
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goto error_power_off;
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/* wait 1 period for first sample availability */
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min_sleep_us = period_us;
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max_sleep_us = period_us + period_us / 2;
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usleep_range(min_sleep_us, max_sleep_us);
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}
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ret = inv_mpu6050_sensor_show(st, st->reg->temperature,
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IIO_MOD_X, val);
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result = inv_mpu6050_switch_engine(st, false,
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INV_MPU6050_SENSOR_TEMP);
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if (result)
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goto error_power_off;
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break;
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case IIO_MAGN:
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result = inv_mpu6050_switch_engine(st, true,
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INV_MPU6050_SENSOR_MAGN);
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if (result)
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goto error_power_off;
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/* frequency is limited for magnetometer */
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if (freq_hz > INV_MPU_MAGN_FREQ_HZ_MAX) {
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freq_hz = INV_MPU_MAGN_FREQ_HZ_MAX;
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period_us = 1000000 / freq_hz;
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if (!st->chip_config.magn_en) {
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result = inv_mpu6050_switch_engine(st, true,
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INV_MPU6050_SENSOR_MAGN);
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if (result)
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goto error_power_off;
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/* frequency is limited for magnetometer */
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if (freq_hz > INV_MPU_MAGN_FREQ_HZ_MAX) {
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freq_hz = INV_MPU_MAGN_FREQ_HZ_MAX;
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period_us = 1000000 / freq_hz;
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}
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/* need to wait 2 periods to have first valid sample */
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min_sleep_us = 2 * period_us;
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max_sleep_us = 2 * (period_us + period_us / 2);
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usleep_range(min_sleep_us, max_sleep_us);
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}
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/* need to wait 2 periods to have first valid sample */
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min_sleep_us = 2 * period_us;
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max_sleep_us = 2 * (period_us + period_us / 2);
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usleep_range(min_sleep_us, max_sleep_us);
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ret = inv_mpu_magn_read(st, chan->channel2, val);
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result = inv_mpu6050_switch_engine(st, false,
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INV_MPU6050_SENSOR_MAGN);
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if (result)
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goto error_power_off;
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break;
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default:
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ret = -EINVAL;
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break;
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}
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result = inv_mpu6050_set_power_itg(st, false);
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if (result)
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goto error_power_off;
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pm_runtime_mark_last_busy(pdev);
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pm_runtime_put_autosuspend(pdev);
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return ret;
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error_power_off:
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inv_mpu6050_set_power_itg(st, false);
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pm_runtime_put_autosuspend(pdev);
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return result;
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}
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@ -795,6 +779,7 @@ static int inv_mpu6050_write_raw(struct iio_dev *indio_dev,
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int val, int val2, long mask)
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{
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struct inv_mpu6050_state *st = iio_priv(indio_dev);
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struct device *pdev = regmap_get_device(st->map);
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int result;
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/*
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@ -806,9 +791,11 @@ static int inv_mpu6050_write_raw(struct iio_dev *indio_dev,
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return result;
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mutex_lock(&st->lock);
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result = inv_mpu6050_set_power_itg(st, true);
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if (result)
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result = pm_runtime_get_sync(pdev);
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if (result < 0) {
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pm_runtime_put_noidle(pdev);
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goto error_write_raw_unlock;
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}
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switch (mask) {
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case IIO_CHAN_INFO_SCALE:
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@ -846,7 +833,8 @@ static int inv_mpu6050_write_raw(struct iio_dev *indio_dev,
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break;
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}
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result |= inv_mpu6050_set_power_itg(st, false);
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pm_runtime_mark_last_busy(pdev);
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pm_runtime_put_autosuspend(pdev);
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error_write_raw_unlock:
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mutex_unlock(&st->lock);
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iio_device_release_direct_mode(indio_dev);
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@ -903,6 +891,7 @@ inv_mpu6050_fifo_rate_store(struct device *dev, struct device_attribute *attr,
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int result;
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struct iio_dev *indio_dev = dev_to_iio_dev(dev);
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struct inv_mpu6050_state *st = iio_priv(indio_dev);
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struct device *pdev = regmap_get_device(st->map);
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if (kstrtoint(buf, 10, &fifo_rate))
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return -EINVAL;
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@ -920,9 +909,11 @@ inv_mpu6050_fifo_rate_store(struct device *dev, struct device_attribute *attr,
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result = 0;
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goto fifo_rate_fail_unlock;
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}
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result = inv_mpu6050_set_power_itg(st, true);
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if (result)
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result = pm_runtime_get_sync(pdev);
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if (result < 0) {
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pm_runtime_put_noidle(pdev);
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goto fifo_rate_fail_unlock;
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}
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result = regmap_write(st->map, st->reg->sample_rate_div, d);
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if (result)
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@ -938,8 +929,9 @@ inv_mpu6050_fifo_rate_store(struct device *dev, struct device_attribute *attr,
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if (result)
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goto fifo_rate_fail_power_off;
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pm_runtime_mark_last_busy(pdev);
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fifo_rate_fail_power_off:
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result |= inv_mpu6050_set_power_itg(st, false);
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pm_runtime_put_autosuspend(pdev);
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fifo_rate_fail_unlock:
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mutex_unlock(&st->lock);
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if (result)
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@ -1385,6 +1377,14 @@ static void inv_mpu_core_disable_regulator_action(void *_data)
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inv_mpu_core_disable_regulator_vddio(st);
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}
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static void inv_mpu_pm_disable(void *data)
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{
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struct device *dev = data;
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pm_runtime_put_sync_suspend(dev);
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pm_runtime_disable(dev);
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}
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int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
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int (*inv_mpu_bus_setup)(struct iio_dev *), int chip_type)
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{
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@ -1409,7 +1409,6 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
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st = iio_priv(indio_dev);
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mutex_init(&st->lock);
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st->chip_type = chip_type;
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st->powerup_count = 0;
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st->irq = irq;
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st->map = regmap;
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@ -1521,8 +1520,16 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
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goto error_power_off;
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}
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/* chip init is done, turning off */
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result = inv_mpu6050_set_power_itg(st, false);
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/* chip init is done, turning on runtime power management */
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result = pm_runtime_set_active(dev);
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if (result)
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goto error_power_off;
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pm_runtime_get_noresume(dev);
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pm_runtime_enable(dev);
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pm_runtime_set_autosuspend_delay(dev, INV_MPU6050_SUSPEND_DELAY_MS);
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pm_runtime_use_autosuspend(dev);
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pm_runtime_put(dev);
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result = devm_add_action_or_reset(dev, inv_mpu_pm_disable, dev);
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if (result)
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return result;
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@ -1590,11 +1597,10 @@ error_power_off:
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}
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EXPORT_SYMBOL_GPL(inv_mpu_core_probe);
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#ifdef CONFIG_PM_SLEEP
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static int inv_mpu_resume(struct device *dev)
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static int __maybe_unused inv_mpu_resume(struct device *dev)
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{
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struct inv_mpu6050_state *st = iio_priv(dev_get_drvdata(dev));
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct inv_mpu6050_state *st = iio_priv(indio_dev);
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int result;
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mutex_lock(&st->lock);
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@ -1603,27 +1609,101 @@ static int inv_mpu_resume(struct device *dev)
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goto out_unlock;
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result = inv_mpu6050_set_power_itg(st, true);
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if (result)
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goto out_unlock;
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result = inv_mpu6050_switch_engine(st, true, st->suspended_sensors);
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if (result)
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goto out_unlock;
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if (iio_buffer_enabled(indio_dev))
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result = inv_mpu6050_prepare_fifo(st, true);
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out_unlock:
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mutex_unlock(&st->lock);
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return result;
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}
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static int inv_mpu_suspend(struct device *dev)
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static int __maybe_unused inv_mpu_suspend(struct device *dev)
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{
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struct inv_mpu6050_state *st = iio_priv(dev_get_drvdata(dev));
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct inv_mpu6050_state *st = iio_priv(indio_dev);
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int result;
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mutex_lock(&st->lock);
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if (iio_buffer_enabled(indio_dev)) {
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result = inv_mpu6050_prepare_fifo(st, false);
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if (result)
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goto out_unlock;
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}
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st->suspended_sensors = 0;
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if (st->chip_config.accl_en)
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st->suspended_sensors |= INV_MPU6050_SENSOR_ACCL;
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if (st->chip_config.gyro_en)
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st->suspended_sensors |= INV_MPU6050_SENSOR_GYRO;
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if (st->chip_config.temp_en)
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st->suspended_sensors |= INV_MPU6050_SENSOR_TEMP;
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if (st->chip_config.magn_en)
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st->suspended_sensors |= INV_MPU6050_SENSOR_MAGN;
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result = inv_mpu6050_switch_engine(st, false, st->suspended_sensors);
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if (result)
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goto out_unlock;
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result = inv_mpu6050_set_power_itg(st, false);
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if (result)
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goto out_unlock;
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inv_mpu_core_disable_regulator_vddio(st);
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out_unlock:
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mutex_unlock(&st->lock);
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return result;
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}
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#endif /* CONFIG_PM_SLEEP */
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SIMPLE_DEV_PM_OPS(inv_mpu_pmops, inv_mpu_suspend, inv_mpu_resume);
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static int __maybe_unused inv_mpu_runtime_suspend(struct device *dev)
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{
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struct inv_mpu6050_state *st = iio_priv(dev_get_drvdata(dev));
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unsigned int sensors;
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int ret;
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mutex_lock(&st->lock);
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sensors = INV_MPU6050_SENSOR_ACCL | INV_MPU6050_SENSOR_GYRO |
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INV_MPU6050_SENSOR_TEMP | INV_MPU6050_SENSOR_MAGN;
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ret = inv_mpu6050_switch_engine(st, false, sensors);
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if (ret)
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goto out_unlock;
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ret = inv_mpu6050_set_power_itg(st, false);
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if (ret)
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goto out_unlock;
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inv_mpu_core_disable_regulator_vddio(st);
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out_unlock:
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mutex_unlock(&st->lock);
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return ret;
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}
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static int __maybe_unused inv_mpu_runtime_resume(struct device *dev)
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{
|
||||
struct inv_mpu6050_state *st = iio_priv(dev_get_drvdata(dev));
|
||||
int ret;
|
||||
|
||||
ret = inv_mpu_core_enable_regulator_vddio(st);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
return inv_mpu6050_set_power_itg(st, true);
|
||||
}
|
||||
|
||||
const struct dev_pm_ops inv_mpu_pmops = {
|
||||
SET_SYSTEM_SLEEP_PM_OPS(inv_mpu_suspend, inv_mpu_resume)
|
||||
SET_RUNTIME_PM_OPS(inv_mpu_runtime_suspend, inv_mpu_runtime_resume, NULL)
|
||||
};
|
||||
EXPORT_SYMBOL_GPL(inv_mpu_pmops);
|
||||
|
||||
MODULE_AUTHOR("Invensense Corporation");
|
||||
|
|
|
|||
|
|
@ -164,6 +164,7 @@ struct inv_mpu6050_hw {
|
|||
* @magn_disabled: magnetometer disabled for backward compatibility reason.
|
||||
* @magn_raw_to_gauss: coefficient to convert mag raw value to Gauss.
|
||||
* @magn_orient: magnetometer sensor chip orientation if available.
|
||||
* @suspended_sensors: sensors mask of sensors turned off for suspend
|
||||
*/
|
||||
struct inv_mpu6050_state {
|
||||
struct mutex lock;
|
||||
|
|
@ -174,7 +175,6 @@ struct inv_mpu6050_state {
|
|||
enum inv_devices chip_type;
|
||||
struct i2c_mux_core *muxc;
|
||||
struct i2c_client *mux_client;
|
||||
unsigned int powerup_count;
|
||||
struct inv_mpu6050_platform_data plat_data;
|
||||
struct iio_mount_matrix orientation;
|
||||
struct regmap *map;
|
||||
|
|
@ -189,6 +189,7 @@ struct inv_mpu6050_state {
|
|||
bool magn_disabled;
|
||||
s32 magn_raw_to_gauss[3];
|
||||
struct iio_mount_matrix magn_orient;
|
||||
unsigned int suspended_sensors;
|
||||
};
|
||||
|
||||
/*register and associated bit definition*/
|
||||
|
|
@ -312,6 +313,7 @@ struct inv_mpu6050_state {
|
|||
#define INV_MPU6050_ACCEL_UP_TIME 20
|
||||
#define INV_MPU6050_GYRO_UP_TIME 35
|
||||
#define INV_MPU6050_GYRO_DOWN_TIME 150
|
||||
#define INV_MPU6050_SUSPEND_DELAY_MS 2000
|
||||
|
||||
/* delay time in microseconds */
|
||||
#define INV_MPU6050_REG_UP_TIME_MIN 5000
|
||||
|
|
@ -439,7 +441,6 @@ int inv_mpu6050_prepare_fifo(struct inv_mpu6050_state *st, bool enable);
|
|||
int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en,
|
||||
unsigned int mask);
|
||||
int inv_mpu6050_write_reg(struct inv_mpu6050_state *st, int reg, u8 val);
|
||||
int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, bool power_on);
|
||||
int inv_mpu_acpi_create_mux_client(struct i2c_client *client);
|
||||
void inv_mpu_acpi_delete_mux_client(struct i2c_client *client);
|
||||
int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
|
||||
|
|
|
|||
|
|
@ -3,6 +3,7 @@
|
|||
* Copyright (C) 2012 Invensense, Inc.
|
||||
*/
|
||||
|
||||
#include <linux/pm_runtime.h>
|
||||
#include "inv_mpu_iio.h"
|
||||
|
||||
static unsigned int inv_scan_query_mpu6050(struct iio_dev *indio_dev)
|
||||
|
|
@ -156,41 +157,43 @@ int inv_mpu6050_prepare_fifo(struct inv_mpu6050_state *st, bool enable)
|
|||
static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable)
|
||||
{
|
||||
struct inv_mpu6050_state *st = iio_priv(indio_dev);
|
||||
struct device *pdev = regmap_get_device(st->map);
|
||||
unsigned int scan;
|
||||
int result;
|
||||
|
||||
scan = inv_scan_query(indio_dev);
|
||||
|
||||
if (enable) {
|
||||
result = inv_mpu6050_set_power_itg(st, true);
|
||||
if (result)
|
||||
scan = inv_scan_query(indio_dev);
|
||||
result = pm_runtime_get_sync(pdev);
|
||||
if (result < 0) {
|
||||
pm_runtime_put_noidle(pdev);
|
||||
return result;
|
||||
}
|
||||
/*
|
||||
* In case autosuspend didn't trigger, turn off first not
|
||||
* required sensors.
|
||||
*/
|
||||
result = inv_mpu6050_switch_engine(st, false, ~scan);
|
||||
if (result)
|
||||
goto error_power_off;
|
||||
result = inv_mpu6050_switch_engine(st, true, scan);
|
||||
if (result)
|
||||
goto error_power_off;
|
||||
st->skip_samples = inv_compute_skip_samples(st);
|
||||
result = inv_mpu6050_prepare_fifo(st, true);
|
||||
if (result)
|
||||
goto error_sensors_off;
|
||||
goto error_power_off;
|
||||
} else {
|
||||
result = inv_mpu6050_prepare_fifo(st, false);
|
||||
if (result)
|
||||
goto error_sensors_off;
|
||||
result = inv_mpu6050_switch_engine(st, false, scan);
|
||||
if (result)
|
||||
goto error_power_off;
|
||||
|
||||
result = inv_mpu6050_set_power_itg(st, false);
|
||||
if (result)
|
||||
goto error_power_off;
|
||||
pm_runtime_mark_last_busy(pdev);
|
||||
pm_runtime_put_autosuspend(pdev);
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
error_sensors_off:
|
||||
inv_mpu6050_switch_engine(st, false, scan);
|
||||
error_power_off:
|
||||
inv_mpu6050_set_power_itg(st, false);
|
||||
pm_runtime_put_autosuspend(pdev);
|
||||
return result;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue