1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright 2011 Analog Devices Inc.
67  * struct adxrs450_state - device instance specific data
82  * adxrs450_spi_read_reg_16() - read 2 bytes from a register pair
86  * @val: somewhere to pass back the value read
97 			.tx_buf = &st->tx,  in adxrs450_spi_read_reg_16()
99 			.len = sizeof(st->tx),  in adxrs450_spi_read_reg_16()
102 			.rx_buf = &st->rx,  in adxrs450_spi_read_reg_16()
104 			.len = sizeof(st->rx),  in adxrs450_spi_read_reg_16()
108 	mutex_lock(&st->buf_lock);  in adxrs450_spi_read_reg_16()
114 	st->tx = cpu_to_be32(tx);  in adxrs450_spi_read_reg_16()
115 	ret = spi_sync_transfer(st->us, xfers, ARRAY_SIZE(xfers));  in adxrs450_spi_read_reg_16()
117 		dev_err(&st->us->dev, "problem while reading 16 bit register 0x%02x\n",  in adxrs450_spi_read_reg_16()
122 	*val = (be32_to_cpu(st->rx) >> 5) & 0xFFFF;  in adxrs450_spi_read_reg_16()
125 	mutex_unlock(&st->buf_lock);  in adxrs450_spi_read_reg_16()
130  * adxrs450_spi_write_reg_16() - write 2 bytes data to a register pair
144 	mutex_lock(&st->buf_lock);  in adxrs450_spi_write_reg_16()
150 	st->tx = cpu_to_be32(tx);  in adxrs450_spi_write_reg_16()
151 	ret = spi_write(st->us, &st->tx, sizeof(st->tx));  in adxrs450_spi_write_reg_16()
153 		dev_err(&st->us->dev, "problem while writing 16 bit register 0x%02x\n",  in adxrs450_spi_write_reg_16()
156 	mutex_unlock(&st->buf_lock);  in adxrs450_spi_write_reg_16()
161  * adxrs450_spi_sensor_data() - read 2 bytes sensor data
163  * @val: somewhere to pass back the value read
171 			.tx_buf = &st->tx,  in adxrs450_spi_sensor_data()
173 			.len = sizeof(st->tx),  in adxrs450_spi_sensor_data()
176 			.rx_buf = &st->rx,  in adxrs450_spi_sensor_data()
178 			.len = sizeof(st->rx),  in adxrs450_spi_sensor_data()
182 	mutex_lock(&st->buf_lock);  in adxrs450_spi_sensor_data()
183 	st->tx = cpu_to_be32(ADXRS450_SENSOR_DATA);  in adxrs450_spi_sensor_data()
185 	ret = spi_sync_transfer(st->us, xfers, ARRAY_SIZE(xfers));  in adxrs450_spi_sensor_data()
187 		dev_err(&st->us->dev, "Problem while reading sensor data\n");  in adxrs450_spi_sensor_data()
191 	*val = (be32_to_cpu(st->rx) >> 10) & 0xFFFF;  in adxrs450_spi_sensor_data()
194 	mutex_unlock(&st->buf_lock);  in adxrs450_spi_sensor_data()
199  * adxrs450_spi_initial() - use for initializing procedure.
201  * @val: somewhere to pass back the value read
210 		.tx_buf = &st->tx,  in adxrs450_spi_initial()
211 		.rx_buf = &st->rx,  in adxrs450_spi_initial()
213 		.len = sizeof(st->tx),  in adxrs450_spi_initial()
216 	mutex_lock(&st->buf_lock);  in adxrs450_spi_initial()
220 	st->tx = cpu_to_be32(tx);  in adxrs450_spi_initial()
221 	ret = spi_sync_transfer(st->us, &xfers, 1);  in adxrs450_spi_initial()
223 		dev_err(&st->us->dev, "Problem while reading initializing data\n");  in adxrs450_spi_initial()
227 	*val = be32_to_cpu(st->rx);  in adxrs450_spi_initial()
230 	mutex_unlock(&st->buf_lock);  in adxrs450_spi_initial()
247 		dev_warn(&st->us->dev, "The initial power on response is not correct! Restart without reset?\n");  in adxrs450_initial_setup()
259 		dev_err(&st->us->dev, "The second response is not correct!\n");  in adxrs450_initial_setup()
260 		return -EIO;  in adxrs450_initial_setup()
267 		dev_err(&st->us->dev, "The third response is not correct!\n");  in adxrs450_initial_setup()
268 		return -EIO;  in adxrs450_initial_setup()
275 		dev_err(&st->us->dev, "The device is not in normal status!\n");  in adxrs450_initial_setup()
276 		return -EINVAL;  in adxrs450_initial_setup()
291 		if (val < -0x400 || val >= 0x400)  in adxrs450_write_raw()
292 			return -EINVAL;  in adxrs450_write_raw()
297 		ret = -EINVAL;  in adxrs450_write_raw()
314 		switch (chan->type) {  in adxrs450_read_raw()
331 			ret = -EINVAL;  in adxrs450_read_raw()
336 		switch (chan->type) {  in adxrs450_read_raw()
346 			return -EINVAL;  in adxrs450_read_raw()
363 		ret = -EINVAL;  in adxrs450_read_raw()
418 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in adxrs450_probe()
420 		return -ENOMEM;  in adxrs450_probe()
422 	st->us = spi;  in adxrs450_probe()
423 	mutex_init(&st->buf_lock);  in adxrs450_probe()
427 	indio_dev->info = &adxrs450_info;  in adxrs450_probe()
428 	indio_dev->modes = INDIO_DIRECT_MODE;  in adxrs450_probe()
429 	indio_dev->channels =  in adxrs450_probe()
430 		adxrs450_channels[spi_get_device_id(spi)->driver_data];  in adxrs450_probe()
431 	indio_dev->num_channels = ARRAY_SIZE(adxrs450_channels);  in adxrs450_probe()
432 	indio_dev->name = spi->dev.driver->name;  in adxrs450_probe()
434 	ret = devm_iio_device_register(&spi->dev, indio_dev);  in adxrs450_probe()
463 MODULE_DESCRIPTION("Analog Devices ADXRS450/ADXRS453 Gyroscope SPI driver");