76cd2e7178
Signed-off-by: Varka Bhadram <varkab@cdac.in> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
150 lines
3.8 KiB
C
150 lines
3.8 KiB
C
/*
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* Copyright (C) 2012 Invensense, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "inv_mpu_iio.h"
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static void inv_scan_query(struct iio_dev *indio_dev)
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{
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struct inv_mpu6050_state *st = iio_priv(indio_dev);
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st->chip_config.gyro_fifo_enable =
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test_bit(INV_MPU6050_SCAN_GYRO_X,
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indio_dev->active_scan_mask) ||
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test_bit(INV_MPU6050_SCAN_GYRO_Y,
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indio_dev->active_scan_mask) ||
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test_bit(INV_MPU6050_SCAN_GYRO_Z,
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indio_dev->active_scan_mask);
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st->chip_config.accl_fifo_enable =
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test_bit(INV_MPU6050_SCAN_ACCL_X,
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indio_dev->active_scan_mask) ||
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test_bit(INV_MPU6050_SCAN_ACCL_Y,
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indio_dev->active_scan_mask) ||
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test_bit(INV_MPU6050_SCAN_ACCL_Z,
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indio_dev->active_scan_mask);
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}
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/**
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* inv_mpu6050_set_enable() - enable chip functions.
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* @indio_dev: Device driver instance.
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* @enable: enable/disable
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*/
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static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable)
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{
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struct inv_mpu6050_state *st = iio_priv(indio_dev);
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int result;
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if (enable) {
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result = inv_mpu6050_set_power_itg(st, true);
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if (result)
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return result;
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inv_scan_query(indio_dev);
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if (st->chip_config.gyro_fifo_enable) {
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result = inv_mpu6050_switch_engine(st, true,
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INV_MPU6050_BIT_PWR_GYRO_STBY);
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if (result)
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return result;
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}
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if (st->chip_config.accl_fifo_enable) {
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result = inv_mpu6050_switch_engine(st, true,
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INV_MPU6050_BIT_PWR_ACCL_STBY);
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if (result)
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return result;
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}
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result = inv_reset_fifo(indio_dev);
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if (result)
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return result;
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} else {
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result = inv_mpu6050_write_reg(st, st->reg->fifo_en, 0);
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if (result)
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return result;
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result = inv_mpu6050_write_reg(st, st->reg->int_enable, 0);
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if (result)
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return result;
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result = inv_mpu6050_write_reg(st, st->reg->user_ctrl, 0);
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if (result)
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return result;
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result = inv_mpu6050_switch_engine(st, false,
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INV_MPU6050_BIT_PWR_GYRO_STBY);
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if (result)
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return result;
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result = inv_mpu6050_switch_engine(st, false,
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INV_MPU6050_BIT_PWR_ACCL_STBY);
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if (result)
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return result;
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result = inv_mpu6050_set_power_itg(st, false);
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if (result)
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return result;
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}
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st->chip_config.enable = enable;
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return 0;
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}
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/**
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* inv_mpu_data_rdy_trigger_set_state() - set data ready interrupt state
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* @trig: Trigger instance
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* @state: Desired trigger state
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*/
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static int inv_mpu_data_rdy_trigger_set_state(struct iio_trigger *trig,
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bool state)
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{
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return inv_mpu6050_set_enable(iio_trigger_get_drvdata(trig), state);
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}
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static const struct iio_trigger_ops inv_mpu_trigger_ops = {
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.owner = THIS_MODULE,
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.set_trigger_state = &inv_mpu_data_rdy_trigger_set_state,
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};
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int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev)
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{
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int ret;
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struct inv_mpu6050_state *st = iio_priv(indio_dev);
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st->trig = devm_iio_trigger_alloc(&indio_dev->dev,
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"%s-dev%d",
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indio_dev->name,
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indio_dev->id);
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if (!st->trig)
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return -ENOMEM;
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ret = devm_request_irq(&indio_dev->dev, st->client->irq,
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&iio_trigger_generic_data_rdy_poll,
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IRQF_TRIGGER_RISING,
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"inv_mpu",
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st->trig);
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if (ret)
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return ret;
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st->trig->dev.parent = &st->client->dev;
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st->trig->ops = &inv_mpu_trigger_ops;
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iio_trigger_set_drvdata(st->trig, indio_dev);
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ret = iio_trigger_register(st->trig);
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if (ret)
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return ret;
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indio_dev->trig = iio_trigger_get(st->trig);
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return 0;
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}
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void inv_mpu6050_remove_trigger(struct inv_mpu6050_state *st)
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{
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iio_trigger_unregister(st->trig);
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}
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