99 lines
2.9 KiB
Diff
99 lines
2.9 KiB
Diff
From cd24e1ce67ea6e34d9ef0886858b8b5ac77bf847 Mon Sep 17 00:00:00 2001
|
|
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
|
|
Date: Fri, 6 Nov 2020 18:45:10 +0000
|
|
Subject: [PATCH] Input: edt-ft5x06: Poll the device if no interrupt is
|
|
configured.
|
|
|
|
Not all systems have the interrupt line wired up, so switch to
|
|
polling the touchscreen off a timer if no interrupt line is
|
|
configured.
|
|
|
|
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
|
|
---
|
|
drivers/input/touchscreen/edt-ft5x06.c | 51 +++++++++++++++++++++-----
|
|
1 file changed, 41 insertions(+), 10 deletions(-)
|
|
|
|
--- a/drivers/input/touchscreen/edt-ft5x06.c
|
|
+++ b/drivers/input/touchscreen/edt-ft5x06.c
|
|
@@ -72,6 +72,8 @@
|
|
#define EDT_DEFAULT_NUM_X 1024
|
|
#define EDT_DEFAULT_NUM_Y 1024
|
|
|
|
+#define POLL_INTERVAL_MS 17 /* 17ms = 60fps */
|
|
+
|
|
enum edt_pmode {
|
|
EDT_PMODE_NOT_SUPPORTED,
|
|
EDT_PMODE_HIBERNATE,
|
|
@@ -130,6 +132,9 @@ struct edt_ft5x06_ts_data {
|
|
|
|
struct edt_reg_addr reg_addr;
|
|
enum edt_ver version;
|
|
+
|
|
+ struct timer_list timer;
|
|
+ struct work_struct work_i2c_poll;
|
|
};
|
|
|
|
struct edt_i2c_chip_data {
|
|
@@ -279,6 +284,22 @@ out:
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
+static void edt_ft5x06_ts_irq_poll_timer(struct timer_list *t)
|
|
+{
|
|
+ struct edt_ft5x06_ts_data *tsdata = from_timer(tsdata, t, timer);
|
|
+
|
|
+ schedule_work(&tsdata->work_i2c_poll);
|
|
+ mod_timer(&tsdata->timer, jiffies + msecs_to_jiffies(POLL_INTERVAL_MS));
|
|
+}
|
|
+
|
|
+static void edt_ft5x06_ts_work_i2c_poll(struct work_struct *work)
|
|
+{
|
|
+ struct edt_ft5x06_ts_data *tsdata = container_of(work,
|
|
+ struct edt_ft5x06_ts_data, work_i2c_poll);
|
|
+
|
|
+ edt_ft5x06_ts_isr(0, tsdata);
|
|
+}
|
|
+
|
|
static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata,
|
|
u8 addr, u8 value)
|
|
{
|
|
@@ -1234,17 +1255,27 @@ static int edt_ft5x06_ts_probe(struct i2
|
|
|
|
i2c_set_clientdata(client, tsdata);
|
|
|
|
- irq_flags = irq_get_trigger_type(client->irq);
|
|
- if (irq_flags == IRQF_TRIGGER_NONE)
|
|
- irq_flags = IRQF_TRIGGER_FALLING;
|
|
- irq_flags |= IRQF_ONESHOT;
|
|
-
|
|
- error = devm_request_threaded_irq(&client->dev, client->irq,
|
|
- NULL, edt_ft5x06_ts_isr, irq_flags,
|
|
- client->name, tsdata);
|
|
- if (error) {
|
|
- dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
|
|
- return error;
|
|
+ if (client->irq) {
|
|
+ irq_flags = irq_get_trigger_type(client->irq);
|
|
+ if (irq_flags == IRQF_TRIGGER_NONE)
|
|
+ irq_flags = IRQF_TRIGGER_FALLING;
|
|
+ irq_flags |= IRQF_ONESHOT;
|
|
+
|
|
+ error = devm_request_threaded_irq(&client->dev, client->irq,
|
|
+ NULL, edt_ft5x06_ts_isr,
|
|
+ irq_flags, client->name,
|
|
+ tsdata);
|
|
+ if (error) {
|
|
+ dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
|
|
+ return error;
|
|
+ }
|
|
+ } else {
|
|
+ INIT_WORK(&tsdata->work_i2c_poll,
|
|
+ edt_ft5x06_ts_work_i2c_poll);
|
|
+ timer_setup(&tsdata->timer, edt_ft5x06_ts_irq_poll_timer, 0);
|
|
+ tsdata->timer.expires = jiffies +
|
|
+ msecs_to_jiffies(POLL_INTERVAL_MS);
|
|
+ add_timer(&tsdata->timer);
|
|
}
|
|
|
|
error = devm_device_add_group(&client->dev, &edt_ft5x06_attr_group);
|