redonkable/remarkable-linux
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Merge branch 'wm97xx'

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This commit is contained in:
Dmitry Torokhov 2008-04-24 13:25:42 -04:00
parent 48bdce4a2e 34d278534d
commit 942bb7b5d6
2 changed files with 51 additions and 8 deletions
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56
drivers/input/touchscreen/wm97xx-core.c
View file

@ -261,6 +261,23 @@ void wm97xx_config_gpio(struct wm97xx *wm, u32 gpio, enum wm97xx_gpio_dir dir,
}
EXPORT_SYMBOL_GPL(wm97xx_config_gpio);
/*
* Configure the WM97XX_PRP value to use while system is suspended.
* If a value other than 0 is set then WM97xx pen detection will be
* left enabled in the configured mode while the system is in suspend,
* the device has users and suspend has not been disabled via the
* wakeup sysfs entries.
*
* @wm: WM97xx device to configure
* @mode: WM97XX_PRP value to configure while suspended
*/
void wm97xx_set_suspend_mode(struct wm97xx *wm, u16 mode)
{
wm->suspend_mode = mode;
device_init_wakeup(&wm->input_dev->dev, mode != 0);
}
EXPORT_SYMBOL_GPL(wm97xx_set_suspend_mode);
/*
* Handle a pen down interrupt.
*/
@ -328,18 +345,18 @@ static void wm97xx_pen_irq_worker(struct work_struct *work)
*
* We have to disable the codec interrupt in the handler because it
* can take upto 1ms to clear the interrupt source. We schedule a task
* in a work queue to do the actual interaction with the chip (it
* doesn't matter if we end up reenqueing it before it is executed
* since we don't touch the chip until it has run). The interrupt is
* then enabled again in the slow handler when the source has been
* cleared.
* in a work queue to do the actual interaction with the chip. The
* interrupt is then enabled again in the slow handler when the source
* has been cleared.
*/
static irqreturn_t wm97xx_pen_interrupt(int irq, void *dev_id)
{
struct wm97xx *wm = dev_id;
wm->mach_ops->irq_enable(wm, 0);
queue_work(wm->ts_workq, &wm->pen_event_work);
if (!work_pending(&wm->pen_event_work)) {
wm->mach_ops->irq_enable(wm, 0);
queue_work(wm->ts_workq, &wm->pen_event_work);
}
return IRQ_HANDLED;
}
@ -355,7 +372,8 @@ static int wm97xx_init_pen_irq(struct wm97xx *wm)
* provided. */
BUG_ON(!wm->mach_ops->irq_enable);
if (request_irq(wm->pen_irq, wm97xx_pen_interrupt, IRQF_SHARED,
if (request_irq(wm->pen_irq, wm97xx_pen_interrupt,
IRQF_SHARED | IRQF_SAMPLE_RANDOM,
"wm97xx-pen", wm)) {
dev_err(wm->dev,
"Failed to register pen down interrupt, polling");
@ -688,10 +706,32 @@ static int wm97xx_remove(struct device *dev)
static int wm97xx_suspend(struct device *dev, pm_message_t state)
{
struct wm97xx *wm = dev_get_drvdata(dev);
u16 reg;
int suspend_mode;
if (device_may_wakeup(&wm->input_dev->dev))
suspend_mode = wm->suspend_mode;
else
suspend_mode = 0;
if (wm->input_dev->users)
cancel_delayed_work_sync(&wm->ts_reader);
/* Power down the digitiser (bypassing the cache for resume) */
reg = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER2);
reg &= ~WM97XX_PRP_DET_DIG;
if (wm->input_dev->users)
reg |= suspend_mode;
wm->ac97->bus->ops->write(wm->ac97, AC97_WM97XX_DIGITISER2, reg);
/* WM9713 has an additional power bit - turn it off if there
* are no users or if suspend mode is zero. */
if (wm->id == WM9713_ID2 &&
(!wm->input_dev->users || !suspend_mode)) {
reg = wm97xx_reg_read(wm, AC97_EXTENDED_MID) | 0x8000;
wm97xx_reg_write(wm, AC97_EXTENDED_MID, reg);
}
return 0;
}

3
include/linux/wm97xx.h
View file

@ -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);