1d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich/* 2d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich * AD7780/AD7781 SPI ADC driver 3d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich * 4d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich * Copyright 2011 Analog Devices Inc. 5d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich * 6d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich * Licensed under the GPL-2. 7d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich */ 8d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich#ifndef IIO_ADC_AD7780_H_ 9d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich#define IIO_ADC_AD7780_H_ 10d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich 11d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich/* 12d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich * TODO: struct ad7780_platform_data needs to go into include/linux/iio 13d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich */ 14d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich 15d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich/* NOTE: 16d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich * The AD7780 doesn't feature a dedicated SPI chip select, in addition it 17d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich * features a dual use data out ready DOUT/RDY output. 18d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich * In order to avoid contentions on the SPI bus, it's therefore necessary 19d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich * to use spi bus locking combined with a dedicated GPIO to control the 20d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich * power down reset signal of the AD7780. 21d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich * 22d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich * The DOUT/RDY output must also be wired to an interrupt capable GPIO. 23d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich */ 24d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich 25d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerichstruct ad7780_platform_data { 26d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich u16 vref_mv; 27d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich int gpio_pdrst; 28d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich}; 29d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich 30d6f087ec9c7ba029419762273a685460c93c8454Michael Hennerich#endif /* IIO_ADC_AD7780_H_ */ 31