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![Lars-Peter Clausen](/assets/img/avatar_default.png)
Currently we use two different naming schemes in the IIO API, iio_verb_object and iio_object_verb. E.g iio_device_register and iio_allocate_device. This patches renames instances of the later to the former. The patch also renames allocate to alloc as this seems to be the preferred form throughout the kernel. In particular the following renames are performed by the patch: iio_put_device -> iio_device_put iio_allocate_device -> iio_device_alloc iio_free_device -> iio_device_free iio_get_trigger -> iio_trigger_get iio_put_trigger -> iio_trigger_put iio_allocate_trigger -> iio_trigger_alloc iio_free_trigger -> iio_trigger_free The conversion was done with the following coccinelle patch with manual fixes to comments and documentation. <smpl> @@ @@ -iio_put_device +iio_device_put @@ @@ -iio_allocate_device +iio_device_alloc @@ @@ -iio_free_device +iio_device_free @@ @@ -iio_get_trigger +iio_trigger_get @@ @@ -iio_put_trigger +iio_trigger_put @@ @@ -iio_allocate_trigger +iio_trigger_alloc @@ @@ -iio_free_trigger +iio_trigger_free </smpl> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
180 lines
4.1 KiB
C
180 lines
4.1 KiB
C
/*
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* ad2s1200.c simple support for the ADI Resolver to Digital Converters:
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* AD2S1200/1205
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*
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* Copyright (c) 2010-2010 Analog Devices Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/types.h>
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#include <linux/mutex.h>
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#include <linux/device.h>
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#include <linux/spi/spi.h>
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#include <linux/slab.h>
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#include <linux/sysfs.h>
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/module.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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#define DRV_NAME "ad2s1200"
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/* input pin sample and rdvel is controlled by driver */
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#define AD2S1200_PN 2
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/* input clock on serial interface */
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#define AD2S1200_HZ 8192000
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/* clock period in nano second */
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#define AD2S1200_TSCLK (1000000000/AD2S1200_HZ)
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struct ad2s1200_state {
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struct mutex lock;
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struct spi_device *sdev;
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int sample;
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int rdvel;
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u8 rx[2] ____cacheline_aligned;
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};
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static int ad2s1200_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int *val,
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int *val2,
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long m)
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{
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int ret = 0;
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s16 vel;
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struct ad2s1200_state *st = iio_priv(indio_dev);
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mutex_lock(&st->lock);
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gpio_set_value(st->sample, 0);
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/* delay (6 * AD2S1200_TSCLK + 20) nano seconds */
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udelay(1);
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gpio_set_value(st->sample, 1);
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gpio_set_value(st->rdvel, !!(chan->type == IIO_ANGL));
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ret = spi_read(st->sdev, st->rx, 2);
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if (ret < 0) {
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mutex_unlock(&st->lock);
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return ret;
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}
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switch (chan->type) {
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case IIO_ANGL:
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*val = (((u16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
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break;
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case IIO_ANGL_VEL:
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vel = (((s16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
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vel = (vel << 4) >> 4;
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*val = vel;
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default:
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mutex_unlock(&st->lock);
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return -EINVAL;
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}
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/* delay (2 * AD2S1200_TSCLK + 20) ns for sample pulse */
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udelay(1);
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mutex_unlock(&st->lock);
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return IIO_VAL_INT;
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}
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static const struct iio_chan_spec ad2s1200_channels[] = {
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{
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.type = IIO_ANGL,
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.indexed = 1,
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.channel = 0,
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.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
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}, {
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.type = IIO_ANGL_VEL,
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.indexed = 1,
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.channel = 0,
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.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
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}
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};
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static const struct iio_info ad2s1200_info = {
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.read_raw = &ad2s1200_read_raw,
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.driver_module = THIS_MODULE,
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};
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static int __devinit ad2s1200_probe(struct spi_device *spi)
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{
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struct ad2s1200_state *st;
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struct iio_dev *indio_dev;
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int pn, ret = 0;
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unsigned short *pins = spi->dev.platform_data;
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for (pn = 0; pn < AD2S1200_PN; pn++)
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if (gpio_request_one(pins[pn], GPIOF_DIR_OUT, DRV_NAME)) {
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pr_err("%s: request gpio pin %d failed\n",
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DRV_NAME, pins[pn]);
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goto error_ret;
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}
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indio_dev = iio_device_alloc(sizeof(*st));
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if (indio_dev == NULL) {
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ret = -ENOMEM;
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goto error_ret;
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}
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spi_set_drvdata(spi, indio_dev);
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st = iio_priv(indio_dev);
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mutex_init(&st->lock);
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st->sdev = spi;
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st->sample = pins[0];
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st->rdvel = pins[1];
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indio_dev->dev.parent = &spi->dev;
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indio_dev->info = &ad2s1200_info;
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indio_dev->modes = INDIO_DIRECT_MODE;
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indio_dev->channels = ad2s1200_channels;
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indio_dev->num_channels = ARRAY_SIZE(ad2s1200_channels);
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indio_dev->name = spi_get_device_id(spi)->name;
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ret = iio_device_register(indio_dev);
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if (ret)
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goto error_free_dev;
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spi->max_speed_hz = AD2S1200_HZ;
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spi->mode = SPI_MODE_3;
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spi_setup(spi);
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return 0;
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error_free_dev:
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iio_device_free(indio_dev);
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error_ret:
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for (--pn; pn >= 0; pn--)
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gpio_free(pins[pn]);
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return ret;
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}
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static int __devexit ad2s1200_remove(struct spi_device *spi)
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{
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iio_device_unregister(spi_get_drvdata(spi));
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iio_device_free(spi_get_drvdata(spi));
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return 0;
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}
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static const struct spi_device_id ad2s1200_id[] = {
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{ "ad2s1200" },
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{ "ad2s1205" },
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{}
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};
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MODULE_DEVICE_TABLE(spi, ad2s1200_id);
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static struct spi_driver ad2s1200_driver = {
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.driver = {
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.name = DRV_NAME,
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.owner = THIS_MODULE,
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},
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.probe = ad2s1200_probe,
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.remove = __devexit_p(ad2s1200_remove),
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.id_table = ad2s1200_id,
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};
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module_spi_driver(ad2s1200_driver);
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MODULE_AUTHOR("Graff Yang <graff.yang@gmail.com>");
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MODULE_DESCRIPTION("Analog Devices AD2S1200/1205 Resolver to Digital SPI driver");
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MODULE_LICENSE("GPL v2");
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