diff options
Diffstat (limited to 'drivers/staging/iio/adc/ad7476_ring.c')
-rw-r--r-- | drivers/staging/iio/adc/ad7476_ring.c | 58 |
1 files changed, 14 insertions, 44 deletions
diff --git a/drivers/staging/iio/adc/ad7476_ring.c b/drivers/staging/iio/adc/ad7476_ring.c index d6af6c05ce1c..383611b05764 100644 --- a/drivers/staging/iio/adc/ad7476_ring.c +++ b/drivers/staging/iio/adc/ad7476_ring.c @@ -1,5 +1,5 @@ /* - * Copyright 2010 Analog Devices Inc. + * Copyright 2010-2012 Analog Devices Inc. * Copyright (C) 2008 Jonathan Cameron * * Licensed under the GPL-2 or later. @@ -13,43 +13,13 @@ #include <linux/slab.h> #include <linux/spi/spi.h> -#include "../iio.h" -#include "../buffer.h" -#include "../ring_sw.h" -#include "../trigger_consumer.h" +#include <linux/iio/iio.h> +#include <linux/iio/buffer.h> +#include <linux/iio/kfifo_buf.h> +#include <linux/iio/trigger_consumer.h> #include "ad7476.h" -/** - * ad7476_ring_preenable() setup the parameters of the ring before enabling - * - * The complex nature of the setting of the number of bytes per datum is due - * to this driver currently ensuring that the timestamp is stored at an 8 - * byte boundary. - **/ -static int ad7476_ring_preenable(struct iio_dev *indio_dev) -{ - struct ad7476_state *st = iio_priv(indio_dev); - struct iio_buffer *ring = indio_dev->buffer; - - st->d_size = bitmap_weight(indio_dev->active_scan_mask, - indio_dev->masklength) * - st->chip_info->channel[0].scan_type.storagebits / 8; - - if (ring->scan_timestamp) { - st->d_size += sizeof(s64); - - if (st->d_size % sizeof(s64)) - st->d_size += sizeof(s64) - (st->d_size % sizeof(s64)); - } - - if (indio_dev->buffer->access->set_bytes_per_datum) - indio_dev->buffer->access-> - set_bytes_per_datum(indio_dev->buffer, st->d_size); - - return 0; -} - static irqreturn_t ad7476_trigger_handler(int irq, void *p) { struct iio_poll_func *pf = p; @@ -59,7 +29,7 @@ static irqreturn_t ad7476_trigger_handler(int irq, void *p) __u8 *rxbuf; int b_sent; - rxbuf = kzalloc(st->d_size, GFP_KERNEL); + rxbuf = kzalloc(indio_dev->scan_bytes, GFP_KERNEL); if (rxbuf == NULL) return -ENOMEM; @@ -70,8 +40,8 @@ static irqreturn_t ad7476_trigger_handler(int irq, void *p) time_ns = iio_get_time_ns(); - if (indio_dev->buffer->scan_timestamp) - memcpy(rxbuf + st->d_size - sizeof(s64), + if (indio_dev->scan_timestamp) + memcpy(rxbuf + indio_dev->scan_bytes - sizeof(s64), &time_ns, sizeof(time_ns)); indio_dev->buffer->access->store_to(indio_dev->buffer, rxbuf, time_ns); @@ -83,7 +53,7 @@ done: } static const struct iio_buffer_setup_ops ad7476_ring_setup_ops = { - .preenable = &ad7476_ring_preenable, + .preenable = &iio_sw_buffer_preenable, .postenable = &iio_triggered_buffer_postenable, .predisable = &iio_triggered_buffer_predisable, }; @@ -93,7 +63,7 @@ int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev) struct ad7476_state *st = iio_priv(indio_dev); int ret = 0; - indio_dev->buffer = iio_sw_rb_allocate(indio_dev); + indio_dev->buffer = iio_kfifo_allocate(indio_dev); if (!indio_dev->buffer) { ret = -ENOMEM; goto error_ret; @@ -108,7 +78,7 @@ int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev) indio_dev->id); if (indio_dev->pollfunc == NULL) { ret = -ENOMEM; - goto error_deallocate_sw_rb; + goto error_deallocate_kfifo; } /* Ring buffer functions - here trigger setup related */ @@ -119,8 +89,8 @@ int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev) indio_dev->modes |= INDIO_BUFFER_TRIGGERED; return 0; -error_deallocate_sw_rb: - iio_sw_rb_free(indio_dev->buffer); +error_deallocate_kfifo: + iio_kfifo_free(indio_dev->buffer); error_ret: return ret; } @@ -128,5 +98,5 @@ error_ret: void ad7476_ring_cleanup(struct iio_dev *indio_dev) { iio_dealloc_pollfunc(indio_dev->pollfunc); - iio_sw_rb_free(indio_dev->buffer); + iio_kfifo_free(indio_dev->buffer); } |