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Input: wm97xx-core - support use as a wakeup source

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The WM97xx touch screen controllers can be used to generate a wakeup
event when the system is suspended. Provide a new core API call
wm97xx_set_suspend_mode() allowing machine drivers to enable this. If no
suspend_mode is provided then the touch panel will be powered down when
the system is suspended.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Mark Brown 2008-04-17 09:24:58 -04:00 • committed by Dmitry Torokhov
parent db7c10e708
commit 34d278534d
2 changed files with 42 additions and 0 deletions
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3
include/linux/wm97xx.h
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@ -282,6 +282,7 @@ 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 suspend_mode; /* PRP in suspend mode */
};
/*
@ -297,6 +298,8 @@ void wm97xx_config_gpio(struct wm97xx *wm, u32 gpio,
enum wm97xx_gpio_sticky sticky,
enum wm97xx_gpio_wake wake);
void wm97xx_set_suspend_mode(struct wm97xx *wm, u16 mode);
/* codec AC97 IO access */
int wm97xx_reg_read(struct wm97xx *wm, u16 reg);
void wm97xx_reg_write(struct wm97xx *wm, u16 reg, u16 val);