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Input: ads7846 - add support for AD7843 parts

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The AD7873 is almost identical to the ADS7846; the only difference is
related to the Power Management bits PD0 and PD1.  This results in a
slightly different PENIRQ enable behavior.  For the AD7873, VREF should
be turned off during differential measurements.

So, add the AD7873/43 to the list of driver supported devices, and prevent
VREF usage during differential/ratiometric conversion modes.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Michael Hennerich
2010-03-09 20:38:45 -08:00
committed by Dmitry Torokhov
parent 9e49f6c133
commit 06a09124b5
3 changed files with 16 additions and 5 deletions
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include/linux/spi/ads7846.h
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@ -12,7 +12,7 @@ enum ads7846_filter {
};
struct ads7846_platform_data {
u16 model; /* 7843, 7845, 7846. */
u16 model; /* 7843, 7845, 7846, 7873. */
u16 vref_delay_usecs; /* 0 for external vref; etc */
u16 vref_mv; /* external vref value, milliVolts */
bool keep_vref_on; /* set to keep vref on for differential