summaryrefslogtreecommitdiff
path: root/drivers/staging/iio/adc/ad7298_ring.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-11 21:59:44 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-11 21:59:44 (GMT)
commit8966961b31c251b854169e9886394c2a20f2cea7 (patch)
tree248a625b23335acbd5ca4b55eb136fe0dc8ba0aa /drivers/staging/iio/adc/ad7298_ring.c
parent6a5971d8fea1f4a8c33dfe0cec6a1c490f0c9cde (diff)
parent7bcb57cde66c19df378f3468ea342166a8a4504d (diff)
downloadlinux-fsl-qoriq-8966961b31c251b854169e9886394c2a20f2cea7.tar.xz
Merge tag 'staging-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver tree merge from Greg Kroah-Hartman: "Here's the big staging tree merge for 3.8-rc1 There's a lot of patches in here, the majority being the comedi rework/cleanup that has been ongoing and is causing a huge reduction in overall code size, which is amazing to watch. We also removed some older drivers (telephony and rts_pstor), and added a new one (fwserial which also came in through the tty tree due to tty api changes, take that one if you get merge conflicts.) The iio and ipack drivers are moving out of the staging area into their own part of the kernel as they have been cleaned up sufficiently and are working well. Overall, again a reduction of code: 768 files changed, 31887 insertions(+), 82166 deletions(-) All of this has been in the linux-next tree for a while. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>" * tag 'staging-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (1298 commits) iio: imu: adis16480: remove duplicated include from adis16480.c iio: gyro: adis16136: remove duplicated include from adis16136.c iio:imu: adis16480: show_firmware() buffer too small iio:gyro: adis16136: divide by zero in write_frequency() iio: adc: Add Texas Instruments ADC081C021/027 support iio:ad7793: Add support for the ad7796 and ad7797 iio:ad7793: Add support for the ad7798 and ad7799 staging:iio: Move ad7793 driver out of staging staging:iio:ad7793: Implement stricter id checking staging:iio:ad7793: Move register definitions from header to source staging:iio:ad7793: Rework regulator handling staging:iio:ad7793: Rework platform data staging:iio:ad7793: Use kstrtol instead of strict_strtol staging:iio:ad7793: Use usleep_range instead of msleep staging:iio:ad7793: Fix temperature scale staging:iio:ad7793: Fix VDD monitor scale staging: gdm72xx: unlock on error in init_usb() staging: panel: pass correct lengths to keypad_send_key() staging: comedi: addi_apci_2032: fix interrupt support staging: comedi: addi_apci_2032: move i_APCI2032_ConfigDigitalOutput() ...
Diffstat (limited to 'drivers/staging/iio/adc/ad7298_ring.c')
-rw-r--r--drivers/staging/iio/adc/ad7298_ring.c113
1 files changed, 0 insertions, 113 deletions
diff --git a/drivers/staging/iio/adc/ad7298_ring.c b/drivers/staging/iio/adc/ad7298_ring.c
deleted file mode 100644
index c2906a8..0000000
--- a/drivers/staging/iio/adc/ad7298_ring.c
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
- * AD7298 SPI ADC driver
- *
- * Copyright 2011-2012 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
- */
-
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/spi/spi.h>
-
-#include <linux/iio/iio.h>
-#include <linux/iio/buffer.h>
-#include <linux/iio/trigger_consumer.h>
-#include <linux/iio/triggered_buffer.h>
-
-#include "ad7298.h"
-
-/**
- * ad7298_update_scan_mode() setup the spi transfer buffer for the new scan mask
- **/
-int ad7298_update_scan_mode(struct iio_dev *indio_dev,
- const unsigned long *active_scan_mask)
-{
- struct ad7298_state *st = iio_priv(indio_dev);
- int i, m;
- unsigned short command;
- int scan_count;
-
- /* Now compute overall size */
- scan_count = bitmap_weight(active_scan_mask, indio_dev->masklength);
-
- command = AD7298_WRITE | st->ext_ref;
-
- for (i = 0, m = AD7298_CH(0); i < AD7298_MAX_CHAN; i++, m >>= 1)
- if (test_bit(i, active_scan_mask))
- command |= m;
-
- st->tx_buf[0] = cpu_to_be16(command);
-
- /* build spi ring message */
- st->ring_xfer[0].tx_buf = &st->tx_buf[0];
- st->ring_xfer[0].len = 2;
- st->ring_xfer[0].cs_change = 1;
- st->ring_xfer[1].tx_buf = &st->tx_buf[1];
- st->ring_xfer[1].len = 2;
- st->ring_xfer[1].cs_change = 1;
-
- spi_message_init(&st->ring_msg);
- spi_message_add_tail(&st->ring_xfer[0], &st->ring_msg);
- spi_message_add_tail(&st->ring_xfer[1], &st->ring_msg);
-
- for (i = 0; i < scan_count; i++) {
- st->ring_xfer[i + 2].rx_buf = &st->rx_buf[i];
- st->ring_xfer[i + 2].len = 2;
- st->ring_xfer[i + 2].cs_change = 1;
- spi_message_add_tail(&st->ring_xfer[i + 2], &st->ring_msg);
- }
- /* make sure last transfer cs_change is not set */
- st->ring_xfer[i + 1].cs_change = 0;
-
- return 0;
-}
-
-/**
- * ad7298_trigger_handler() bh of trigger launched polling to ring buffer
- *
- * Currently there is no option in this driver to disable the saving of
- * timestamps within the ring.
- **/
-static irqreturn_t ad7298_trigger_handler(int irq, void *p)
-{
- struct iio_poll_func *pf = p;
- struct iio_dev *indio_dev = pf->indio_dev;
- struct ad7298_state *st = iio_priv(indio_dev);
- s64 time_ns = 0;
- __u16 buf[16];
- int b_sent, i;
-
- b_sent = spi_sync(st->spi, &st->ring_msg);
- if (b_sent)
- goto done;
-
- if (indio_dev->scan_timestamp) {
- time_ns = iio_get_time_ns();
- memcpy((u8 *)buf + indio_dev->scan_bytes - sizeof(s64),
- &time_ns, sizeof(time_ns));
- }
-
- for (i = 0; i < bitmap_weight(indio_dev->active_scan_mask,
- indio_dev->masklength); i++)
- buf[i] = be16_to_cpu(st->rx_buf[i]);
-
- iio_push_to_buffer(indio_dev->buffer, (u8 *)buf);
-
-done:
- iio_trigger_notify_done(indio_dev->trig);
-
- return IRQ_HANDLED;
-}
-
-int ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev)
-{
- return iio_triggered_buffer_setup(indio_dev, NULL,
- &ad7298_trigger_handler, NULL);
-}
-
-void ad7298_ring_cleanup(struct iio_dev *indio_dev)
-{
- iio_triggered_buffer_cleanup(indio_dev);
-}