From 46df6378c8484eb3ae054938ffb17c2bea691f7b Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <jic23@kernel.org>
Date: Sat, 21 Apr 2012 10:09:38 +0100
Subject: [PATCH] staging:iio:adc:ad7476 use iio_sw_buffer_preenable instead of
local version.
Now the generic version caches the scan size the version in this driver
is redundant.
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/iio/adc/ad7476.h | 1 -
drivers/staging/iio/adc/ad7476_ring.c | 36 +++------------------------
2 files changed, 3 insertions(+), 34 deletions(-)
diff --git a/drivers/staging/iio/adc/ad7476.h b/drivers/staging/iio/adc/ad7476.h
index 27f696c75cc4d..b1dd9317fe1f6 100644
--- a/drivers/staging/iio/adc/ad7476.h
+++ b/drivers/staging/iio/adc/ad7476.h
@@ -27,7 +27,6 @@ struct ad7476_state {
struct spi_device *spi;
const struct ad7476_chip_info *chip_info;
struct regulator *reg;
- size_t d_size;
u16 int_vref_mv;
struct spi_transfer xfer;
struct spi_message msg;
diff --git a/drivers/staging/iio/adc/ad7476_ring.c b/drivers/staging/iio/adc/ad7476_ring.c
index d6af6c05ce1c1..a090bc3acc9d0 100644
--- a/drivers/staging/iio/adc/ad7476_ring.c
+++ b/drivers/staging/iio/adc/ad7476_ring.c
@@ -20,36 +20,6 @@
#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;
@@ -71,7 +41,7 @@ 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),
+ 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,
};
--
2.30.2