diff options
author | Alexandru Ardelean <alexandru.ardelean@analog.com> | 2019-03-22 23:44:40 +0300 |
---|---|---|
committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2019-04-04 22:20:26 +0300 |
commit | 0e92e2d036232da1543599dc9b7acc1ce4289d1b (patch) | |
tree | ef02c10668d99b92b36887c42e6d0f68caea41f9 | |
parent | 5075e0720d93a84e059759c5d8c6a78613d0face (diff) | |
download | linux-0e92e2d036232da1543599dc9b7acc1ce4289d1b.tar.xz |
iio: imu: adis16400: move burst logic to ADIS lib
This change has been done separately, so that it's easier to visualize the
changed logic in the adis_scan_update() function.
Most of the function in this `adis16400_update_scan_mode()` that deals with
burst-mode will be re-used in the ADIS16480, but with different parameters.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
-rw-r--r-- | drivers/iio/imu/Makefile | 1 | ||||
-rw-r--r-- | drivers/iio/imu/adis16400.h | 16 | ||||
-rw-r--r-- | drivers/iio/imu/adis16400_buffer.c | 59 | ||||
-rw-r--r-- | drivers/iio/imu/adis16400_core.c | 2 | ||||
-rw-r--r-- | drivers/iio/imu/adis_buffer.c | 40 |
5 files changed, 41 insertions, 77 deletions
diff --git a/drivers/iio/imu/Makefile b/drivers/iio/imu/Makefile index 68629c68b19b..4898799347d5 100644 --- a/drivers/iio/imu/Makefile +++ b/drivers/iio/imu/Makefile @@ -5,7 +5,6 @@ # When adding new entries keep the list in alphabetical order adis16400-y := adis16400_core.o -adis16400-$(CONFIG_IIO_BUFFER) += adis16400_buffer.o obj-$(CONFIG_ADIS16400) += adis16400.o obj-$(CONFIG_ADIS16480) += adis16480.o diff --git a/drivers/iio/imu/adis16400.h b/drivers/iio/imu/adis16400.h index 93b6c0c41fdd..7e2e0dbaa2e1 100644 --- a/drivers/iio/imu/adis16400.h +++ b/drivers/iio/imu/adis16400.h @@ -194,20 +194,4 @@ enum { ADIS16400_SCAN_TIMESTAMP, }; -#ifdef CONFIG_IIO_BUFFER - -ssize_t adis16400_read_data_from_ring(struct device *dev, - struct device_attribute *attr, - char *buf); - - -int adis16400_update_scan_mode(struct iio_dev *indio_dev, - const unsigned long *scan_mask); - -#else /* CONFIG_IIO_BUFFER */ - -#define adis16400_update_scan_mode NULL - -#endif /* CONFIG_IIO_BUFFER */ - #endif /* SPI_ADIS16400_H_ */ diff --git a/drivers/iio/imu/adis16400_buffer.c b/drivers/iio/imu/adis16400_buffer.c deleted file mode 100644 index 199bd72348eb..000000000000 --- a/drivers/iio/imu/adis16400_buffer.c +++ /dev/null @@ -1,59 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#include <linux/interrupt.h> -#include <linux/mutex.h> -#include <linux/kernel.h> -#include <linux/spi/spi.h> -#include <linux/slab.h> -#include <linux/bitops.h> -#include <linux/export.h> - -#include <linux/iio/iio.h> -#include <linux/iio/buffer.h> -#include <linux/iio/triggered_buffer.h> -#include <linux/iio/trigger_consumer.h> - -#include "adis16400.h" - -int adis16400_update_scan_mode(struct iio_dev *indio_dev, - const unsigned long *scan_mask) -{ - struct adis16400_state *st = iio_priv(indio_dev); - struct adis *adis = &st->adis; - unsigned int burst_length; - u8 *tx; - - if (!adis->burst || !adis->burst->en) - return adis_update_scan_mode(indio_dev, scan_mask); - - kfree(adis->xfer); - kfree(adis->buffer); - - /* All but the timestamp channel */ - burst_length = (indio_dev->num_channels - 1) * sizeof(u16); - burst_length += adis->burst->extra_len; - - adis->xfer = kcalloc(2, sizeof(*adis->xfer), GFP_KERNEL); - if (!adis->xfer) - return -ENOMEM; - - adis->buffer = kzalloc(burst_length + sizeof(u16), GFP_KERNEL); - if (!adis->buffer) - return -ENOMEM; - - tx = adis->buffer + burst_length; - tx[0] = ADIS_READ_REG(adis->burst->reg_cmd); - tx[1] = 0; - - adis->xfer[0].tx_buf = tx; - adis->xfer[0].bits_per_word = 8; - adis->xfer[0].len = 2; - adis->xfer[1].rx_buf = adis->buffer; - adis->xfer[1].bits_per_word = 8; - adis->xfer[1].len = burst_length; - - spi_message_init(&adis->msg); - spi_message_add_tail(&adis->xfer[0], &adis->msg); - spi_message_add_tail(&adis->xfer[1], &adis->msg); - - return 0; -} diff --git a/drivers/iio/imu/adis16400_core.c b/drivers/iio/imu/adis16400_core.c index 093c809dae50..c75d23bc49bf 100644 --- a/drivers/iio/imu/adis16400_core.c +++ b/drivers/iio/imu/adis16400_core.c @@ -886,7 +886,7 @@ static struct adis16400_chip_info adis16400_chips[] = { static const struct iio_info adis16400_info = { .read_raw = &adis16400_read_raw, .write_raw = &adis16400_write_raw, - .update_scan_mode = adis16400_update_scan_mode, + .update_scan_mode = adis_update_scan_mode, .debugfs_reg_access = adis_debugfs_reg_access, }; diff --git a/drivers/iio/imu/adis_buffer.c b/drivers/iio/imu/adis_buffer.c index 76643c5571aa..3a7c970568dc 100644 --- a/drivers/iio/imu/adis_buffer.c +++ b/drivers/iio/imu/adis_buffer.c @@ -20,6 +20,43 @@ #include <linux/iio/triggered_buffer.h> #include <linux/iio/imu/adis.h> +static int adis_update_scan_mode_burst(struct iio_dev *indio_dev, + const unsigned long *scan_mask) +{ + struct adis *adis = iio_device_get_drvdata(indio_dev); + unsigned int burst_length; + u8 *tx; + + /* All but the timestamp channel */ + burst_length = (indio_dev->num_channels - 1) * sizeof(u16); + burst_length += adis->burst->extra_len; + + adis->xfer = kcalloc(2, sizeof(*adis->xfer), GFP_KERNEL); + if (!adis->xfer) + return -ENOMEM; + + adis->buffer = kzalloc(burst_length + sizeof(u16), GFP_KERNEL); + if (!adis->buffer) + return -ENOMEM; + + tx = adis->buffer + burst_length; + tx[0] = ADIS_READ_REG(adis->burst->reg_cmd); + tx[1] = 0; + + adis->xfer[0].tx_buf = tx; + adis->xfer[0].bits_per_word = 8; + adis->xfer[0].len = 2; + adis->xfer[1].rx_buf = adis->buffer; + adis->xfer[1].bits_per_word = 8; + adis->xfer[1].len = burst_length; + + spi_message_init(&adis->msg); + spi_message_add_tail(&adis->xfer[0], &adis->msg); + spi_message_add_tail(&adis->xfer[1], &adis->msg); + + return 0; +} + int adis_update_scan_mode(struct iio_dev *indio_dev, const unsigned long *scan_mask) { @@ -32,6 +69,9 @@ int adis_update_scan_mode(struct iio_dev *indio_dev, kfree(adis->xfer); kfree(adis->buffer); + if (adis->burst && adis->burst->en) + return adis_update_scan_mode_burst(indio_dev, scan_mask); + scan_count = indio_dev->scan_bytes / 2; adis->xfer = kcalloc(scan_count + 1, sizeof(*adis->xfer), GFP_KERNEL); |