diff options
Diffstat (limited to 'drivers/staging/iio/frequency/ad9951.c')
| -rw-r--r-- | drivers/staging/iio/frequency/ad9951.c | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/drivers/staging/iio/frequency/ad9951.c b/drivers/staging/iio/frequency/ad9951.c deleted file mode 100644 index d465db0e9c0b..000000000000 --- a/drivers/staging/iio/frequency/ad9951.c +++ /dev/null @@ -1,201 +0,0 @@ -/* - * Driver for ADI Direct Digital Synthesis ad9951 - * - * Copyright (c) 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/module.h> - -#include <linux/iio/iio.h> -#include <linux/iio/sysfs.h> - -#define DRV_NAME "ad9951" - -#define CFR1 0x0 -#define CFR2 0x1 - -#define AUTO_OSK (1) -#define OSKEN (1 << 1) -#define LOAD_ARR (1 << 2) - -#define AUTO_SYNC (1 << 7) - -#define LSB_FST (1) -#define SDIO_IPT (1 << 1) -#define CLR_PHA (1 << 2) -#define SINE_OPT (1 << 4) -#define ACLR_PHA (1 << 5) - -#define VCO_RANGE (1 << 2) - -#define CRS_OPT (1 << 1) -#define HMANU_SYNC (1 << 2) -#define HSPD_SYNC (1 << 3) - -/* Register format: 1 byte addr + value */ -struct ad9951_config { - u8 asf[3]; - u8 arr[2]; - u8 ftw0[5]; - u8 ftw1[3]; -}; - -struct ad9951_state { - struct mutex lock; - struct spi_device *sdev; -}; - -static ssize_t ad9951_set_parameter(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct spi_transfer xfer; - int ret; - struct ad9951_config *config = (struct ad9951_config *)buf; - struct iio_dev *idev = dev_to_iio_dev(dev); - struct ad9951_state *st = iio_priv(idev); - - xfer.len = 3; - xfer.tx_buf = &config->asf[0]; - mutex_lock(&st->lock); - - ret = spi_sync_transfer(st->sdev, &xfer, 1); - if (ret) - goto error_ret; - - xfer.len = 2; - xfer.tx_buf = &config->arr[0]; - - ret = spi_sync_transfer(st->sdev, &xfer, 1); - if (ret) - goto error_ret; - - xfer.len = 5; - xfer.tx_buf = &config->ftw0[0]; - - ret = spi_sync_transfer(st->sdev, &xfer, 1); - if (ret) - goto error_ret; - - xfer.len = 3; - xfer.tx_buf = &config->ftw1[0]; - - ret = spi_sync_transfer(st->sdev, &xfer, 1); - if (ret) - goto error_ret; -error_ret: - mutex_unlock(&st->lock); - - return ret ? ret : len; -} - -static IIO_DEVICE_ATTR(dds, S_IWUSR, NULL, ad9951_set_parameter, 0); - -static void ad9951_init(struct ad9951_state *st) -{ - struct spi_transfer xfer; - int ret; - u8 cfr[5]; - - cfr[0] = CFR1; - cfr[1] = 0; - cfr[2] = LSB_FST | CLR_PHA | SINE_OPT | ACLR_PHA; - cfr[3] = AUTO_OSK | OSKEN | LOAD_ARR; - cfr[4] = 0; - - mutex_lock(&st->lock); - - xfer.len = 5; - xfer.tx_buf = 𝔠 - - ret = spi_sync_transfer(st->sdev, &xfer, 1); - if (ret) - goto error_ret; - - cfr[0] = CFR2; - cfr[1] = VCO_RANGE; - cfr[2] = HSPD_SYNC; - cfr[3] = 0; - - xfer.len = 4; - xfer.tx_buf = 𝔠 - - ret = spi_sync_transfer(st->sdev, &xfer, 1); - if (ret) - goto error_ret; - -error_ret: - mutex_unlock(&st->lock); - - - -} - -static struct attribute *ad9951_attributes[] = { - &iio_dev_attr_dds.dev_attr.attr, - NULL, -}; - -static const struct attribute_group ad9951_attribute_group = { - .attrs = ad9951_attributes, -}; - -static const struct iio_info ad9951_info = { - .attrs = &ad9951_attribute_group, - .driver_module = THIS_MODULE, -}; - -static int ad9951_probe(struct spi_device *spi) -{ - struct ad9951_state *st; - struct iio_dev *idev; - int ret = 0; - - idev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); - if (!idev) - return -ENOMEM; - spi_set_drvdata(spi, idev); - st = iio_priv(idev); - mutex_init(&st->lock); - st->sdev = spi; - - idev->dev.parent = &spi->dev; - - idev->info = &ad9951_info; - idev->modes = INDIO_DIRECT_MODE; - - ret = devm_iio_device_register(&spi->dev, idev); - if (ret) - return ret; - spi->max_speed_hz = 2000000; - spi->mode = SPI_MODE_3; - spi->bits_per_word = 8; - spi_setup(spi); - ad9951_init(st); - return 0; -} - -static struct spi_driver ad9951_driver = { - .driver = { - .name = DRV_NAME, - .owner = THIS_MODULE, - }, - .probe = ad9951_probe, -}; -module_spi_driver(ad9951_driver); - -MODULE_AUTHOR("Cliff Cai"); -MODULE_DESCRIPTION("Analog Devices ad9951 driver"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("spi:" DRV_NAME); |