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Input: ad714x - read the interrupt status registers in a row

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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>
This commit is contained in:
Michael Hennerich
2011-08-22 09:45:42 -07:00
committed by Dmitry Torokhov
parent c0409feb86
commit 9eff794b77
4 changed files with 51 additions and 43 deletions
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6
drivers/input/misc/ad714x.h
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@@ -1,7 +1,7 @@
/*
* AD714X CapTouch Programmable Controller driver (bus interfaces)
*
* Copyright 2009 Analog Devices Inc.
* Copyright 2009-2011 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
@@ -18,12 +18,12 @@ struct ad714x_platform_data;
struct ad714x_driver_data;
struct ad714x_chip;
typedef int (*ad714x_read_t)(struct ad714x_chip *, unsigned short, unsigned short *);
typedef int (*ad714x_read_t)(struct ad714x_chip *, unsigned short, unsigned short *, size_t);
typedef int (*ad714x_write_t)(struct ad714x_chip *, unsigned short, unsigned short);
struct ad714x_chip {
unsigned short h_state;
unsigned short l_state;
unsigned short h_state;
unsigned short c_state;
unsigned short adc_reg[STAGE_NUM];
unsigned short amb_reg[STAGE_NUM];