9eff794b77
The interrupt status registers should be read in row to avoid invalid data. Alter "read" method for both bus options to allow reading several registers in a row and make sure we read interrupt status registers properly. Read sequence saves 50% of bus transactions compared to single register reads. So use it also for the result registers, which are also located in a row. Also update copyright notice. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
/*
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* AD714X CapTouch Programmable Controller driver (bus interfaces)
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*
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* Copyright 2009-2011 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#ifndef _AD714X_H_
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#define _AD714X_H_
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#include <linux/types.h>
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#define STAGE_NUM 12
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struct device;
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struct ad714x_platform_data;
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struct ad714x_driver_data;
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struct ad714x_chip;
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typedef int (*ad714x_read_t)(struct ad714x_chip *, unsigned short, unsigned short *, size_t);
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typedef int (*ad714x_write_t)(struct ad714x_chip *, unsigned short, unsigned short);
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struct ad714x_chip {
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unsigned short l_state;
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unsigned short h_state;
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unsigned short c_state;
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unsigned short adc_reg[STAGE_NUM];
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unsigned short amb_reg[STAGE_NUM];
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unsigned short sensor_val[STAGE_NUM];
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struct ad714x_platform_data *hw;
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struct ad714x_driver_data *sw;
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int irq;
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struct device *dev;
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ad714x_read_t read;
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ad714x_write_t write;
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struct mutex mutex;
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unsigned product;
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unsigned version;
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__be16 xfer_buf[16] ____cacheline_aligned;
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};
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int ad714x_disable(struct ad714x_chip *ad714x);
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int ad714x_enable(struct ad714x_chip *ad714x);
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struct ad714x_chip *ad714x_probe(struct device *dev, u16 bus_type, int irq,
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ad714x_read_t read, ad714x_write_t write);
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void ad714x_remove(struct ad714x_chip *ad714x);
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#endif
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