| /* |
| * AD7606 SPI ADC driver |
| * |
| * Copyright 2011 Analog Devices Inc. |
| * |
| * Licensed under the GPL-2. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/spi/spi.h> |
| #include <linux/types.h> |
| #include <linux/err.h> |
| |
| #include "../iio.h" |
| #include "ad7606.h" |
| |
| #define MAX_SPI_FREQ_HZ 23500000 /* VDRIVE above 4.75 V */ |
| |
| static int ad7606_spi_read_block(struct device *dev, |
| int count, void *buf) |
| { |
| struct spi_device *spi = to_spi_device(dev); |
| int i, ret; |
| unsigned short *data = buf; |
| |
| ret = spi_read(spi, (u8 *)buf, count * 2); |
| if (ret < 0) { |
| dev_err(&spi->dev, "SPI read error\n"); |
| return ret; |
| } |
| |
| for (i = 0; i < count; i++) |
| data[i] = be16_to_cpu(data[i]); |
| |
| return 0; |
| } |
| |
| static const struct ad7606_bus_ops ad7606_spi_bops = { |
| .read_block = ad7606_spi_read_block, |
| }; |
| |
| static int __devinit ad7606_spi_probe(struct spi_device *spi) |
| { |
| struct iio_dev *indio_dev; |
| |
| indio_dev = ad7606_probe(&spi->dev, spi->irq, NULL, |
| spi_get_device_id(spi)->driver_data, |
| &ad7606_spi_bops); |
| |
| if (IS_ERR(indio_dev)) |
| return PTR_ERR(indio_dev); |
| |
| spi_set_drvdata(spi, indio_dev); |
| |
| return 0; |
| } |
| |
| static int __devexit ad7606_spi_remove(struct spi_device *spi) |
| { |
| struct iio_dev *indio_dev = dev_get_drvdata(&spi->dev); |
| |
| return ad7606_remove(indio_dev, spi->irq); |
| } |
| |
| #ifdef CONFIG_PM |
| static int ad7606_spi_suspend(struct device *dev) |
| { |
| struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| |
| ad7606_suspend(indio_dev); |
| |
| return 0; |
| } |
| |
| static int ad7606_spi_resume(struct device *dev) |
| { |
| struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| |
| ad7606_resume(indio_dev); |
| |
| return 0; |
| } |
| |
| static const struct dev_pm_ops ad7606_pm_ops = { |
| .suspend = ad7606_spi_suspend, |
| .resume = ad7606_spi_resume, |
| }; |
| #define AD7606_SPI_PM_OPS (&ad7606_pm_ops) |
| |
| #else |
| #define AD7606_SPI_PM_OPS NULL |
| #endif |
| |
| static const struct spi_device_id ad7606_id[] = { |
| {"ad7606-8", ID_AD7606_8}, |
| {"ad7606-6", ID_AD7606_6}, |
| {"ad7606-4", ID_AD7606_4}, |
| {} |
| }; |
| |
| static struct spi_driver ad7606_driver = { |
| .driver = { |
| .name = "ad7606", |
| .bus = &spi_bus_type, |
| .owner = THIS_MODULE, |
| .pm = AD7606_SPI_PM_OPS, |
| }, |
| .probe = ad7606_spi_probe, |
| .remove = __devexit_p(ad7606_spi_remove), |
| .id_table = ad7606_id, |
| }; |
| |
| static int __init ad7606_spi_init(void) |
| { |
| return spi_register_driver(&ad7606_driver); |
| } |
| module_init(ad7606_spi_init); |
| |
| static void __exit ad7606_spi_exit(void) |
| { |
| spi_unregister_driver(&ad7606_driver); |
| } |
| module_exit(ad7606_spi_exit); |
| |
| MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); |
| MODULE_DESCRIPTION("Analog Devices AD7606 ADC"); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_ALIAS("spi:ad7606_spi"); |