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Input: wm97xx - add possibility to control the GPIO_STATUS shift

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This patch allows tweaking the behaviour of GPIO_STATUS register
shift quirk that's in wm97xx-core. The problem with GPIO_STATUS
register being shifted by one doesn't appear on all hardware it
seems and causes problems with accelerated touchscreen drivers on
Palm hardware. Therefore an accelerated touchscreen driver can select
if the shift is/isn't happening on the hardware.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Marek Vasut
2009-07-20 22:28:50 -07:00
committed by Dmitry Torokhov
parent b833306feb
commit 99fde513f5
3 changed files with 14 additions and 2 deletions
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7
include/linux/wm97xx.h
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@@ -15,6 +15,12 @@
#include <linux/input.h> /* Input device layer */
#include <linux/platform_device.h>
/*
* WM97xx variants
*/
#define WM97xx_GENERIC 0x0000
#define WM97xx_WM1613 0x1613
/*
* WM97xx AC97 Touchscreen registers
*/
@@ -283,6 +289,7 @@ struct wm97xx {
unsigned pen_is_down:1; /* Pen is down */
unsigned aux_waiting:1; /* aux measurement waiting */
unsigned pen_probably_down:1; /* used in polling mode */
u16 variant; /* WM97xx chip variant */
u16 suspend_mode; /* PRP in suspend mode */
};