staging: iio: ad2s1200: Move driver out of staging

Move the iio driver for the ad2s1200 and ad2s1205 resolver-to-digital
converter out of staging, into mainline iio subsystems.

Signed-off-by: David Veenstra <davidjulianveenstra@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

3 files changed, 0 insertions, 223 deletions

diff --git a/drivers/staging/iio/resolver/Kconfig b/drivers/staging/iio/resolver/Kconfig
index 1c7e2860d6b7..6a469ee6101f 100644
--- a/drivers/staging/iio/resolver/Kconfig
+++ b/drivers/staging/iio/resolver/Kconfig
@@ -13,18 +13,6 @@ config AD2S90
 	  To compile this driver as a module, choose M here: the
 	  module will be called ad2s90.
 
-config AD2S1200
-	tristate "Analog Devices ad2s1200/ad2s1205 driver"
-	depends on SPI
-	depends on GPIOLIB || COMPILE_TEST
-	help
-	  Say yes here to build support for Analog Devices spi resolver
-	  to digital converters, ad2s1200 and ad2s1205, provides direct access
-	  via sysfs.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called ad2s1200.
-
 config AD2S1210
 	tristate "Analog Devices ad2s1210 driver"
 	depends on SPI
diff --git a/drivers/staging/iio/resolver/Makefile b/drivers/staging/iio/resolver/Makefile
index 14375e444ebf..8d901dc7500b 100644
--- a/drivers/staging/iio/resolver/Makefile
+++ b/drivers/staging/iio/resolver/Makefile
@@ -3,5 +3,4 @@
 #
 
 obj-$(CONFIG_AD2S90) += ad2s90.o
-obj-$(CONFIG_AD2S1200) += ad2s1200.o
 obj-$(CONFIG_AD2S1210) += ad2s1210.o
diff --git a/drivers/staging/iio/resolver/ad2s1200.c b/drivers/staging/iio/resolver/ad2s1200.c
deleted file mode 100644
index 28e618af9939..000000000000
--- a/drivers/staging/iio/resolver/ad2s1200.c
+++ /dev/null
@@ -1,210 +0,0 @@
-/*
- * ad2s1200.c simple support for the ADI Resolver to Digital Converters:
- * AD2S1200/1205
- *
- * Copyright (c) 2018-2018 David Veenstra <davidjulianveenstra@gmail.com>
- * 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/bitops.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/gpio.h>
-#include <linux/gpio/consumer.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/spi/spi.h>
-#include <linux/sysfs.h>
-#include <linux/types.h>
-
-#include <linux/iio/iio.h>
-#include <linux/iio/sysfs.h>
-
-#define DRV_NAME "ad2s1200"
-
-/* input clock on serial interface */
-#define AD2S1200_HZ	8192000
-/* clock period in nano second */
-#define AD2S1200_TSCLK	(1000000000 / AD2S1200_HZ)
-
-/**
- * struct ad2s1200_state - driver instance specific data.
- * @lock:	protects both the GPIO pins and the rx buffer.
- * @sdev:	spi device.
- * @sample:	GPIO pin SAMPLE.
- * @rdvel:	GPIO pin RDVEL.
- * @rx:		buffer for spi transfers.
- */
-struct ad2s1200_state {
-	struct mutex lock;
-	struct spi_device *sdev;
-	struct gpio_desc *sample;
-	struct gpio_desc *rdvel;
-	__be16 rx ____cacheline_aligned;
-};
-
-static int ad2s1200_read_raw(struct iio_dev *indio_dev,
-			     struct iio_chan_spec const *chan,
-			     int *val,
-			     int *val2,
-			     long m)
-{
-	struct ad2s1200_state *st = iio_priv(indio_dev);
-	int ret;
-
-	switch (m) {
-	case IIO_CHAN_INFO_SCALE:
-		switch (chan->type) {
-		case IIO_ANGL:
-			/* 2 * Pi / (2^12 - 1) ~= 0.001534355 */
-			*val = 0;
-			*val2 = 1534355;
-			return IIO_VAL_INT_PLUS_NANO;
-		case IIO_ANGL_VEL:
-			/* 2 * Pi ~= 6.283185 */
-			*val = 6;
-			*val2 = 283185;
-			return IIO_VAL_INT_PLUS_MICRO;
-		default:
-			return -EINVAL;
-		}
-		break;
-	case IIO_CHAN_INFO_RAW:
-		mutex_lock(&st->lock);
-		gpiod_set_value(st->sample, 0);
-
-		/* delay (6 * AD2S1200_TSCLK + 20) nano seconds */
-		udelay(1);
-		gpiod_set_value(st->sample, 1);
-		gpiod_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 = be16_to_cpup(&st->rx) >> 4;
-			break;
-		case IIO_ANGL_VEL:
-			*val = sign_extend32(be16_to_cpup(&st->rx) >> 4, 11);
-			break;
-		default:
-			mutex_unlock(&st->lock);
-			return -EINVAL;
-		}
-
-		/* delay (2 * AD2S1200_TSCLK + 20) ns for sample pulse */
-		udelay(1);
-		mutex_unlock(&st->lock);
-
-		return IIO_VAL_INT;
-	default:
-		break;
-	}
-
-	return -EINVAL;
-}
-
-static const struct iio_chan_spec ad2s1200_channels[] = {
-	{
-		.type = IIO_ANGL,
-		.indexed = 1,
-		.channel = 0,
-		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
-		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
-	}, {
-		.type = IIO_ANGL_VEL,
-		.indexed = 1,
-		.channel = 0,
-		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
-		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
-	}
-};
-
-static const struct iio_info ad2s1200_info = {
-	.read_raw = ad2s1200_read_raw,
-};
-
-static int ad2s1200_probe(struct spi_device *spi)
-{
-	struct ad2s1200_state *st;
-	struct iio_dev *indio_dev;
-	int ret;
-
-	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
-	if (!indio_dev)
-		return -ENOMEM;
-
-	spi_set_drvdata(spi, indio_dev);
-	st = iio_priv(indio_dev);
-	mutex_init(&st->lock);
-	st->sdev = spi;
-
-	st->sample = devm_gpiod_get(&spi->dev, "adi,sample", GPIOD_OUT_LOW);
-	if (IS_ERR(st->sample)) {
-		dev_err(&spi->dev, "Failed to claim SAMPLE gpio: err=%ld\n",
-			PTR_ERR(st->sample));
-		return PTR_ERR(st->sample);
-	}
-
-	st->rdvel = devm_gpiod_get(&spi->dev, "adi,rdvel", GPIOD_OUT_LOW);
-	if (IS_ERR(st->rdvel)) {
-		dev_err(&spi->dev, "Failed to claim RDVEL gpio: err=%ld\n",
-			PTR_ERR(st->rdvel));
-		return PTR_ERR(st->rdvel);
-	}
-
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->info = &ad2s1200_info;
-	indio_dev->modes = INDIO_DIRECT_MODE;
-	indio_dev->channels = ad2s1200_channels;
-	indio_dev->num_channels = ARRAY_SIZE(ad2s1200_channels);
-	indio_dev->name = spi_get_device_id(spi)->name;
-
-	spi->max_speed_hz = AD2S1200_HZ;
-	spi->mode = SPI_MODE_3;
-	ret = spi_setup(spi);
-
-	if (ret < 0) {
-		dev_err(&spi->dev, "spi_setup failed!\n");
-		return ret;
-	}
-
-	return devm_iio_device_register(&spi->dev, indio_dev);
-}
-
-static const struct of_device_id ad2s1200_of_match[] = {
-	{ .compatible = "adi,ad2s1200", },
-	{ .compatible = "adi,ad2s1205", },
-	{ }
-};
-MODULE_DEVICE_TABLE(of, ad2s1200_of_match);
-
-static const struct spi_device_id ad2s1200_id[] = {
-	{ "ad2s1200" },
-	{ "ad2s1205" },
-	{}
-};
-MODULE_DEVICE_TABLE(spi, ad2s1200_id);
-
-static struct spi_driver ad2s1200_driver = {
-	.driver = {
-		.name = DRV_NAME,
-		.of_match_table = of_match_ptr(ad2s1200_of_match),
-	},
-	.probe = ad2s1200_probe,
-	.id_table = ad2s1200_id,
-};
-module_spi_driver(ad2s1200_driver);
-
-MODULE_AUTHOR("David Veenstra <davidjulianveenstra@gmail.com>");
-MODULE_AUTHOR("Graff Yang <graff.yang@gmail.com>");
-MODULE_DESCRIPTION("Analog Devices AD2S1200/1205 Resolver to Digital SPI driver");
-MODULE_LICENSE("GPL v2");