diff options
Diffstat (limited to 'drivers/input/touchscreen/elan_ts.c')
| -rw-r--r-- | drivers/input/touchscreen/elan_ts.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/elan_ts.c b/drivers/input/touchscreen/elan_ts.c index 7edd87d6cd1b..fd85c1b33b7c 100644 --- a/drivers/input/touchscreen/elan_ts.c +++ b/drivers/input/touchscreen/elan_ts.c @@ -1,5 +1,6 @@ /* * Copyright (C) 2007-2008 HTC Corporation. + * Copyright (C) 2012 Freescale Semiconductor, Inc. * * This driver is adapted from elan8232_i2c.c written by Shan-Fu Chiou * <sfchiou@gmail.com> and Jay Tu <jay_tu@htc.com>. @@ -28,6 +29,8 @@ #include <linux/hrtimer.h> #include <linux/gpio.h> +#include <linux/earlysuspend.h> + static const char ELAN_TS_NAME[] = "elan-touch"; #define ELAN_TS_X_MAX 1088 @@ -55,6 +58,9 @@ static struct elan_data { struct i2c_client *client; struct input_dev *input; wait_queue_head_t wait; +#ifdef CONFIG_EARLYSUSPEND + struct early_suspend es_handler; +#endif } elan_touch_data; /*--------------------------------------------------------------*/ @@ -267,6 +273,12 @@ static int elan_touch_register_interrupt(struct i2c_client *client) return 0; } +#ifdef CONFIG_EARLYSUSPEND +static void elan_early_suspend(struct early_suspend *h); +static void elan_later_resume(struct early_suspend *h); +#endif + + static int elan_touch_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -328,6 +340,15 @@ static int elan_touch_probe(struct i2c_client *client, goto fail; } +#ifdef CONFIG_EARLYSUSPEND + /* register this client's earlysuspend */ + elan_touch_data.es_handler.level = EARLY_SUSPEND_LEVEL_DISABLE_FB; + elan_touch_data.es_handler.suspend = elan_early_suspend; + elan_touch_data.es_handler.resume = elan_later_resume; + elan_touch_data.es_handler.data = (void *)client; + register_early_suspend(&elan_touch_data.es_handler); +#endif + elan_touch_register_interrupt(elan_touch_data.client); return 0; @@ -341,6 +362,10 @@ fail: static int elan_touch_remove(struct i2c_client *client) { +#ifdef CONFIG_EARLYSUSPEND + unregister_early_suspend(&elan_touch_data.es_handler); +#endif + if (elan_wq) destroy_workqueue(elan_wq); @@ -353,6 +378,28 @@ static int elan_touch_remove(struct i2c_client *client) return 0; } +#ifdef CONFIG_EARLYSUSPEND +static void elan_early_suspend(struct early_suspend *h) +{ +} + +static void elan_later_resume(struct early_suspend *h) +{ + if (0 == elan_touch_detect_int_level()) { + pr_debug("elan_ts: got touch in suspend period\n"); + if (h->data) { + /*if touch screen during suspend, recv and drop the + data, then touch interrupt pin will return high after + receving data. + */ + uint8_t buf_recv[IDX_PACKET_SIZE]; + elan_touch_recv_data((struct i2c_client *)(h->data), + buf_recv); + } + } +} +#endif + /* -------------------------------------------------------------------- */ static const struct i2c_device_id elan_touch_id[] = { {"elan-touch", 0}, |