>From d5de0d22109de7564f9bf1df688acbe6b18f41db Mon Sep 17 00:00:00 2001
From: Kwangwoo Lee <kwangwoo.lee@xxxxxxxxx>
Date: Mon, 11 May 2009 20:05:50 +0900
Subject: [PATCH 2/2] Input: tsc2007: do I2C transfers in non-interrupt context.
This patch enhances pointer movements much smoother.
The original patch is written by Thierry.
Signed-off-by: Thierry Reding <thierry.reding@xxxxxxxxxxxxxxxxx>
Signed-off-by: Kwangwoo Lee <kwangwoo.lee@xxxxxxxxx>
---
drivers/input/touchscreen/tsc2007.c | 18 ++++++++++++++----
1 files changed, 14 insertions(+), 4 deletions(-)
diff --git a/drivers/input/touchscreen/tsc2007.c
b/drivers/input/touchscreen/tsc2007.c
index 948e167..03bbe58 100644
--- a/drivers/input/touchscreen/tsc2007.c
+++ b/drivers/input/touchscreen/tsc2007.c
@@ -70,6 +70,7 @@ struct ts_event {
struct tsc2007 {
struct input_dev *input;
char phys[32];
+ struct work_struct work;
struct hrtimer timer;
struct ts_event tc;
@@ -173,6 +174,9 @@ static void tsc2007_send_event(void *tsc)
dev_dbg(&ts->client->dev, "point(%4d,%4d), pressure (%4u)\n",
x, y, rt);
+ } else {
+ if (!ts->pendown)
+ ts->pendown = 1;
}
hrtimer_start(&ts->timer, ktime_set(0, TS_POLL_PERIOD),
@@ -197,6 +201,13 @@ static int tsc2007_read_values(struct tsc2007 *tsc)
return 0;
}
+static void tsc2007_work(struct work_struct *work)
+{
+ struct tsc2007 *ts = container_of(work, struct tsc2007, work);
+ tsc2007_read_values(ts);
+ tsc2007_send_event(ts);
+}
+
static enum hrtimer_restart tsc2007_timer(struct hrtimer *handle)
{
struct tsc2007 *ts = container_of(handle, struct tsc2007, timer);
@@ -218,9 +229,7 @@ static enum hrtimer_restart tsc2007_timer(struct
hrtimer *handle)
} else {
/* pen is still down, continue with the measurement */
dev_dbg(&ts->client->dev, "pen is still down\n");
-
- tsc2007_read_values(ts);
- tsc2007_send_event(ts);
+ schedule_work(&ts->work);
}
spin_unlock_irqrestore(&ts->lock, flags);
@@ -253,7 +262,7 @@ static int tsc2007_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct tsc2007 *ts;
- struct tsc2007_platform_data *pdata = pdata = client->dev.platform_data;
+ struct tsc2007_platform_data *pdata = client->dev.platform_data;
struct input_dev *input_dev;
int err;
@@ -280,6 +289,7 @@ static int tsc2007_probe(struct i2c_client *client,
hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
ts->timer.function = tsc2007_timer;
+ INIT_WORK(&ts->work, tsc2007_work);
spin_lock_init(&ts->lock);
--
1.5.6.5
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