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authorJonathan Cameron <jic23@cam.ac.uk>2011-10-05 15:28:02 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2011-10-05 13:47:47 -0700
commit10e4a52b6e471cea2e87e71f8708a8c8c6b75266 (patch)
treeb3681b90adb54af800389d065ffd4d725f8da7fa /drivers/staging/iio/resolver/ad2s120x.c
parent9c5ed829424e05a469715abc87994e6dbf11ba70 (diff)
downloadop-kernel-dev-10e4a52b6e471cea2e87e71f8708a8c8c6b75266.zip
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staging:iio:resolver rename ad2s120x ->ad2s1200
There are far too many possible part numbers that are not covered in here to have such a generic name. So move to naming after one of the supported parts. Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk> Acked-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/iio/resolver/ad2s120x.c')
-rw-r--r--drivers/staging/iio/resolver/ad2s120x.c178
1 files changed, 0 insertions, 178 deletions
diff --git a/drivers/staging/iio/resolver/ad2s120x.c b/drivers/staging/iio/resolver/ad2s120x.c
deleted file mode 100644
index 7dadcd0..0000000
--- a/drivers/staging/iio/resolver/ad2s120x.c
+++ /dev/null
@@ -1,178 +0,0 @@
-/*
- * ad2s120x.c simple support for the ADI Resolver to Digital Converters: AD2S1200/1205
- *
- * Copyright (c) 2010-2010 Analog Devices Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-#include <linux/types.h>
-#include <linux/mutex.h>
-#include <linux/device.h>
-#include <linux/spi/spi.h>
-#include <linux/slab.h>
-#include <linux/sysfs.h>
-#include <linux/delay.h>
-#include <linux/gpio.h>
-#include <linux/module.h>
-
-#include "../iio.h"
-#include "../sysfs.h"
-
-#define DRV_NAME "ad2s120x"
-
-/* input pin sample and rdvel is controlled by driver */
-#define AD2S120X_PN 2
-
-/* input clock on serial interface */
-#define AD2S120X_HZ 8192000
-/* clock period in nano second */
-#define AD2S120X_TSCLK (1000000000/AD2S120X_HZ)
-
-struct ad2s120x_state {
- struct mutex lock;
- struct spi_device *sdev;
- int sample;
- int rdvel;
- u8 rx[2] ____cacheline_aligned;
-};
-
-static int ad2s1200_read_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int *val,
- int *val2,
- long m)
-{
- int ret = 0;
- s16 vel;
- struct ad2s120x_state *st = iio_priv(indio_dev);
-
- mutex_lock(&st->lock);
- gpio_set_value(st->sample, 0);
- /* delay (6 * AD2S120X_TSCLK + 20) nano seconds */
- udelay(1);
- gpio_set_value(st->sample, 1);
- gpio_set_value(st->rdvel, !!(chan->type == IIO_ANGL));
- ret = spi_read(st->sdev, st->rx, 2);
- if (ret < 0) {
- mutex_unlock(&st->lock);
- return ret;
- }
-
- switch (chan->type) {
- case IIO_ANGL:
- *val = (((u16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
- break;
- case IIO_ANGL_VEL:
- vel = (((s16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
- vel = (vel << 4) >> 4;
- *val = vel;
- default:
- mutex_unlock(&st->lock);
- return -EINVAL;
- }
- /* delay (2 * AD2S120X_TSCLK + 20) ns for sample pulse */
- udelay(1);
- mutex_unlock(&st->lock);
- return IIO_VAL_INT;
-}
-
-static const struct iio_chan_spec ad2s1200_channels[] = {
- {
- .type = IIO_ANGL,
- .indexed = 1,
- .channel = 0,
- }, {
- .type = IIO_ANGL_VEL,
- .indexed = 1,
- .channel = 0,
- }
-};
-
-static const struct iio_info ad2s120x_info = {
- .read_raw = &ad2s1200_read_raw,
- .driver_module = THIS_MODULE,
-};
-
-static int __devinit ad2s120x_probe(struct spi_device *spi)
-{
- struct ad2s120x_state *st;
- struct iio_dev *indio_dev;
- int pn, ret = 0;
- unsigned short *pins = spi->dev.platform_data;
-
- for (pn = 0; pn < AD2S120X_PN; pn++)
- if (gpio_request_one(pins[pn], GPIOF_DIR_OUT, DRV_NAME)) {
- pr_err("%s: request gpio pin %d failed\n",
- DRV_NAME, pins[pn]);
- goto error_ret;
- }
- indio_dev = iio_allocate_device(sizeof(*st));
- if (indio_dev == NULL) {
- ret = -ENOMEM;
- goto error_ret;
- }
- spi_set_drvdata(spi, indio_dev);
- st = iio_priv(indio_dev);
- mutex_init(&st->lock);
- st->sdev = spi;
- st->sample = pins[0];
- st->rdvel = pins[1];
-
- indio_dev->dev.parent = &spi->dev;
- indio_dev->info = &ad2s120x_info;
- indio_dev->modes = INDIO_DIRECT_MODE;
- indio_dev->channels = ad2s1200_channels;
- indio_dev->num_channels = ARRAY_SIZE(ad2s1200_channels);
-
- ret = iio_device_register(indio_dev);
- if (ret)
- goto error_free_dev;
-
- spi->max_speed_hz = AD2S120X_HZ;
- spi->mode = SPI_MODE_3;
- spi_setup(spi);
-
- return 0;
-
-error_free_dev:
- iio_free_device(indio_dev);
-error_ret:
- for (--pn; pn >= 0; pn--)
- gpio_free(pins[pn]);
- return ret;
-}
-
-static int __devexit ad2s120x_remove(struct spi_device *spi)
-{
- iio_device_unregister(spi_get_drvdata(spi));
-
- return 0;
-}
-
-static struct spi_driver ad2s120x_driver = {
- .driver = {
- .name = DRV_NAME,
- .owner = THIS_MODULE,
- },
- .probe = ad2s120x_probe,
- .remove = __devexit_p(ad2s120x_remove),
-};
-
-static __init int ad2s120x_spi_init(void)
-{
- return spi_register_driver(&ad2s120x_driver);
-}
-module_init(ad2s120x_spi_init);
-
-static __exit void ad2s120x_spi_exit(void)
-{
- spi_unregister_driver(&ad2s120x_driver);
-}
-module_exit(ad2s120x_spi_exit);
-
-MODULE_AUTHOR("Graff Yang <graff.yang@gmail.com>");
-MODULE_DESCRIPTION("Analog Devices AD2S1200/1205 Resolver to Digital SPI driver");
-MODULE_LICENSE("GPL v2");
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