diff options
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/touchscreen/ads7846.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index c34e59b720a6..d983cc51ad32 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -54,7 +54,8 @@ * files. */ -#define TS_POLL_PERIOD msecs_to_jiffies(10) +#define TS_POLL_DELAY (1 * 1000000) /* ns delay before the first sample */ +#define TS_POLL_PERIOD (5 * 1000000) /* ns delay between samples */ /* this driver doesn't aim at the peak continuous sample rate */ #define SAMPLE_BITS (8 /*cmd*/ + 16 /*sample*/ + 2 /* before, after */) @@ -99,7 +100,7 @@ struct ads7846 { u16 debounce_rep; spinlock_t lock; - struct timer_list timer; /* P: lock */ + struct hrtimer timer; unsigned pendown:1; /* P: lock */ unsigned pending:1; /* P: lock */ // FIXME remove "irq_disabled" @@ -407,10 +408,12 @@ static void ads7846_rx(void *ads) Rt = 0; /* Sample found inconsistent by debouncing or pressure is beyond - * the maximum. Don't report it to user space, repeat at least - * once more the measurement */ + * the maximum. Don't report it to user space, repeat at least + * once more the measurement + */ if (ts->tc.ignore || Rt > ts->pressure_max) { - mod_timer(&ts->timer, jiffies + TS_POLL_PERIOD); + hrtimer_start(&ts->timer, ktime_set(0, TS_POLL_PERIOD), + HRTIMER_REL); return; } @@ -452,7 +455,7 @@ static void ads7846_rx(void *ads) spin_lock_irqsave(&ts->lock, flags); ts->pendown = (Rt != 0); - mod_timer(&ts->timer, jiffies + TS_POLL_PERIOD); + hrtimer_start(&ts->timer, ktime_set(0, TS_POLL_PERIOD), HRTIMER_REL); spin_unlock_irqrestore(&ts->lock, flags); } @@ -543,9 +546,9 @@ static void ads7846_rx_val(void *ads) status); } -static void ads7846_timer(unsigned long handle) +static int ads7846_timer(struct hrtimer *handle) { - struct ads7846 *ts = (void *)handle; + struct ads7846 *ts = container_of(handle, struct ads7846, timer); int status = 0; spin_lock_irq(&ts->lock); @@ -567,6 +570,7 @@ static void ads7846_timer(unsigned long handle) } spin_unlock_irq(&ts->lock); + return HRTIMER_NORESTART; } static irqreturn_t ads7846_irq(int irq, void *handle) @@ -585,7 +589,8 @@ static irqreturn_t ads7846_irq(int irq, void *handle) ts->irq_disabled = 1; disable_irq(ts->spi->irq); ts->pending = 1; - mod_timer(&ts->timer, jiffies); + hrtimer_start(&ts->timer, ktime_set(0, TS_POLL_DELAY), + HRTIMER_REL); } } spin_unlock_irqrestore(&ts->lock, flags); @@ -719,8 +724,7 @@ static int __devinit ads7846_probe(struct spi_device *spi) ts->spi = spi; ts->input = input_dev; - init_timer(&ts->timer); - ts->timer.data = (unsigned long) ts; + hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_REL); ts->timer.function = ads7846_timer; spin_lock_init(&ts->lock); |