1 #include <linux/interrupt.h>
2 #include <linux/mutex.h>
3 #include <linux/kernel.h>
4 #include <linux/spi/spi.h>
5 #include <linux/slab.h>
6 #include <linux/bitops.h>
7 #include <linux/export.h>
9 #include <linux/iio/iio.h>
10 #include <linux/iio/buffer.h>
11 #include <linux/iio/triggered_buffer.h>
12 #include <linux/iio/trigger_consumer.h>
14 #include "adis16400.h"
16 int adis16400_update_scan_mode(struct iio_dev *indio_dev,
17 const unsigned long *scan_mask)
19 struct adis16400_state *st = iio_priv(indio_dev);
20 struct adis *adis = &st->adis;
23 if (st->variant->flags & ADIS16400_NO_BURST)
24 return adis_update_scan_mode(indio_dev, scan_mask);
29 adis->xfer = kcalloc(2, sizeof(*adis->xfer), GFP_KERNEL);
33 adis->buffer = kzalloc(indio_dev->scan_bytes + sizeof(u16),
39 tx = adis->buffer + indio_dev->scan_bytes;
41 tx[0] = ADIS_READ_REG(ADIS16400_GLOB_CMD);
44 adis->xfer[0].tx_buf = tx;
45 adis->xfer[0].bits_per_word = 8;
46 adis->xfer[0].len = 2;
47 adis->xfer[1].tx_buf = tx;
48 adis->xfer[1].bits_per_word = 8;
49 adis->xfer[1].len = indio_dev->scan_bytes;
51 spi_message_init(&adis->msg);
52 spi_message_add_tail(&adis->xfer[0], &adis->msg);
53 spi_message_add_tail(&adis->xfer[1], &adis->msg);
58 irqreturn_t adis16400_trigger_handler(int irq, void *p)
60 struct iio_poll_func *pf = p;
61 struct iio_dev *indio_dev = pf->indio_dev;
62 struct adis16400_state *st = iio_priv(indio_dev);
63 struct adis *adis = &st->adis;
64 u32 old_speed_hz = st->adis.spi->max_speed_hz;
70 if (!(st->variant->flags & ADIS16400_NO_BURST) &&
71 st->adis.spi->max_speed_hz > ADIS16400_SPI_BURST) {
72 st->adis.spi->max_speed_hz = ADIS16400_SPI_BURST;
73 spi_setup(st->adis.spi);
76 ret = spi_sync(adis->spi, &adis->msg);
78 dev_err(&adis->spi->dev, "Failed to read data: %d\n", ret);
80 if (!(st->variant->flags & ADIS16400_NO_BURST)) {
81 st->adis.spi->max_speed_hz = old_speed_hz;
82 spi_setup(st->adis.spi);
85 iio_push_to_buffers_with_timestamp(indio_dev, adis->buffer,
88 iio_trigger_notify_done(indio_dev->trig);