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Input: ads7846 - add possibility to use external vref on ads7846

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Just set vref_mv in your platform config to use external vref. Otherwise
the internal one is used.

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Alexander Stein
2011-05-11 16:24:08 -07:00
committed by Dmitry Torokhov
parent e70bdd41bd
commit ebcaaad9d5
2 changed files with 13 additions and 9 deletions
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3
include/linux/spi/ads7846.h
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@@ -14,7 +14,8 @@ enum ads7846_filter {
struct ads7846_platform_data {
u16 model; /* 7843, 7845, 7846, 7873. */
u16 vref_delay_usecs; /* 0 for external vref; etc */
u16 vref_mv; /* external vref value, milliVolts */
u16 vref_mv; /* external vref value, milliVolts
* ads7846: if 0, use internal vref */
bool keep_vref_on; /* set to keep vref on for differential
* measurements as well */
bool swap_xy; /* swap x and y axes */