diff options
Diffstat (limited to 'drivers/iio/dac/ad5766.c')
| -rw-r--r-- | drivers/iio/dac/ad5766.c | 48 |
1 files changed, 45 insertions, 3 deletions
diff --git a/drivers/iio/dac/ad5766.c b/drivers/iio/dac/ad5766.c index 3104ec32dfac..b0d220c3a126 100644 --- a/drivers/iio/dac/ad5766.c +++ b/drivers/iio/dac/ad5766.c @@ -5,10 +5,13 @@ * Copyright 2019-2020 Analog Devices Inc. */ #include <linux/bitfield.h> +#include <linux/bitops.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/gpio/consumer.h> #include <linux/iio/iio.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/iio/trigger_consumer.h> #include <linux/module.h> #include <linux/spi/spi.h> #include <asm/unaligned.h> @@ -455,6 +458,7 @@ static const struct iio_chan_spec_ext_info ad5766_ext_info[] = { .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | \ BIT(IIO_CHAN_INFO_SCALE), \ + .scan_index = (_chan), \ .scan_type = { \ .sign = 'u', \ .realbits = (_bits), \ @@ -503,13 +507,13 @@ static int ad5766_get_output_range(struct ad5766_state *st) int i, ret, min, max, tmp[2]; ret = device_property_read_u32_array(&st->spi->dev, - "output-range-voltage", + "output-range-microvolts", tmp, 2); if (ret) return ret; - min = tmp[0] / 1000; - max = tmp[1] / 1000; + min = tmp[0] / 1000000; + max = tmp[1] / 1000000; for (i = 0; i < ARRAY_SIZE(ad5766_span_tbl); i++) { if (ad5766_span_tbl[i].min != min || ad5766_span_tbl[i].max != max) @@ -576,6 +580,35 @@ static int ad5766_default_setup(struct ad5766_state *st) return __ad5766_spi_write(st, AD5766_CMD_SPAN_REG, st->crt_range); } +static irqreturn_t ad5766_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct iio_buffer *buffer = indio_dev->buffer; + struct ad5766_state *st = iio_priv(indio_dev); + int ret, ch, i; + u16 data[ARRAY_SIZE(ad5766_channels)]; + + ret = iio_pop_from_buffer(buffer, data); + if (ret) + goto done; + + i = 0; + mutex_lock(&st->lock); + for_each_set_bit(ch, indio_dev->active_scan_mask, + st->chip_info->num_channels - 1) + __ad5766_spi_write(st, AD5766_CMD_WR_IN_REG(ch), data[i++]); + + __ad5766_spi_write(st, AD5766_CMD_SW_LDAC, + *indio_dev->active_scan_mask); + mutex_unlock(&st->lock); + +done: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + static int ad5766_probe(struct spi_device *spi) { enum ad5766_type type; @@ -609,6 +642,15 @@ static int ad5766_probe(struct spi_device *spi) if (ret) return ret; + /* Configure trigger buffer */ + ret = devm_iio_triggered_buffer_setup_ext(&spi->dev, indio_dev, NULL, + ad5766_trigger_handler, + IIO_BUFFER_DIRECTION_OUT, + NULL, + NULL); + if (ret) + return ret; + return devm_iio_device_register(&spi->dev, indio_dev); } |