diff options
author | Lars-Peter Clausen <lars@metafoo.de> | 2012-11-13 13:28:00 (GMT) |
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committer | Jonathan Cameron <jic23@kernel.org> | 2012-11-19 22:22:08 (GMT) |
commit | 5cb7cb1191fc8fc0fcf9a1cc43b9ed7168c5c44a (patch) | |
tree | 705990f526adca93a1e6f1db1a4899df95a28efb /drivers/staging/iio/accel/adis16240_ring.c | |
parent | edcf600912d218a1d8a6378e37b19ecab63abddd (diff) | |
download | linux-fsl-qoriq-5cb7cb1191fc8fc0fcf9a1cc43b9ed7168c5c44a.tar.xz |
staging:iio:adis16240: Use adis library
Use the new adis library for the adis16240 driver. This allows us to completely
scrap the adis16240 buffer and trigger code and more than half of the core
driver code.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/staging/iio/accel/adis16240_ring.c')
-rw-r--r-- | drivers/staging/iio/accel/adis16240_ring.c | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/drivers/staging/iio/accel/adis16240_ring.c b/drivers/staging/iio/accel/adis16240_ring.c deleted file mode 100644 index e2ac8a8..0000000 --- a/drivers/staging/iio/accel/adis16240_ring.c +++ /dev/null @@ -1,132 +0,0 @@ -#include <linux/export.h> -#include <linux/interrupt.h> -#include <linux/mutex.h> -#include <linux/kernel.h> -#include <linux/spi/spi.h> -#include <linux/slab.h> - -#include <linux/iio/iio.h> -#include "../ring_sw.h" -#include <linux/iio/trigger_consumer.h> -#include "adis16240.h" - -/** - * adis16240_read_ring_data() read data registers which will be placed into ring - * @indio_dev: the IIO device - * @rx: somewhere to pass back the value read - **/ -static int adis16240_read_ring_data(struct iio_dev *indio_dev, u8 *rx) -{ - struct spi_message msg; - struct adis16240_state *st = iio_priv(indio_dev); - struct spi_transfer xfers[ADIS16240_OUTPUTS + 1]; - int ret; - int i; - - mutex_lock(&st->buf_lock); - - spi_message_init(&msg); - - memset(xfers, 0, sizeof(xfers)); - for (i = 0; i <= ADIS16240_OUTPUTS; i++) { - xfers[i].bits_per_word = 8; - xfers[i].cs_change = 1; - xfers[i].len = 2; - xfers[i].delay_usecs = 30; - xfers[i].tx_buf = st->tx + 2 * i; - st->tx[2 * i] - = ADIS16240_READ_REG(ADIS16240_SUPPLY_OUT + 2 * i); - st->tx[2 * i + 1] = 0; - if (i >= 1) - xfers[i].rx_buf = rx + 2 * (i - 1); - spi_message_add_tail(&xfers[i], &msg); - } - - ret = spi_sync(st->us, &msg); - if (ret) - dev_err(&st->us->dev, "problem when burst reading"); - - mutex_unlock(&st->buf_lock); - - return ret; -} - -static irqreturn_t adis16240_trigger_handler(int irq, void *p) -{ - struct iio_poll_func *pf = p; - struct iio_dev *indio_dev = pf->indio_dev; - struct adis16240_state *st = iio_priv(indio_dev); - - int i = 0; - s16 *data; - - data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); - if (data == NULL) { - dev_err(&st->us->dev, "memory alloc failed in ring bh"); - goto done; - } - - if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength) && - adis16240_read_ring_data(indio_dev, st->rx) >= 0) - for (; i < bitmap_weight(indio_dev->active_scan_mask, - indio_dev->masklength); i++) - data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2])); - - /* Guaranteed to be aligned with 8 byte boundary */ - if (indio_dev->scan_timestamp) - *((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp; - - iio_push_to_buffers(indio_dev, (u8 *)data); - - kfree(data); -done: - iio_trigger_notify_done(indio_dev->trig); - - return IRQ_HANDLED; -} - -void adis16240_unconfigure_ring(struct iio_dev *indio_dev) -{ - iio_dealloc_pollfunc(indio_dev->pollfunc); - iio_sw_rb_free(indio_dev->buffer); -} - -static const struct iio_buffer_setup_ops adis16240_ring_setup_ops = { - .preenable = &iio_sw_buffer_preenable, - .postenable = &iio_triggered_buffer_postenable, - .predisable = &iio_triggered_buffer_predisable, -}; - -int adis16240_configure_ring(struct iio_dev *indio_dev) -{ - int ret = 0; - struct iio_buffer *ring; - - ring = iio_sw_rb_allocate(indio_dev); - if (!ring) { - ret = -ENOMEM; - return ret; - } - indio_dev->buffer = ring; - ring->scan_timestamp = true; - indio_dev->setup_ops = &adis16240_ring_setup_ops; - - indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time, - &adis16240_trigger_handler, - IRQF_ONESHOT, - indio_dev, - "%s_consumer%d", - indio_dev->name, - indio_dev->id); - if (indio_dev->pollfunc == NULL) { - ret = -ENOMEM; - goto error_iio_sw_rb_free; - } - - indio_dev->modes |= INDIO_BUFFER_TRIGGERED; - return 0; - -error_iio_sw_rb_free: - iio_sw_rb_free(indio_dev->buffer); - return ret; -} |