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8299d1f057
Rebased RPi foundation patches on linux 5.10.59, removed applied and reverted patches, wireless patches and defconfig patches. bcm2708: boot tested on RPi B+ v1.2 bcm2709: boot tested on RPi 4B v1.1 4G bcm2711: boot tested on RPi 4B v1.1 4G Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
99 lines
2.9 KiB
Diff
99 lines
2.9 KiB
Diff
From d7763e8128b7697f5521e08f097f455d20aab5be Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Fri, 6 Nov 2020 18:45:10 +0000
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Subject: [PATCH] Input: edt-ft5x06: Poll the device if no interrupt is
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configured.
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Not all systems have the interrupt line wired up, so switch to
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polling the touchscreen off a timer if no interrupt line is
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configured.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/input/touchscreen/edt-ft5x06.c | 51 +++++++++++++++++++++-----
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1 file changed, 41 insertions(+), 10 deletions(-)
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--- a/drivers/input/touchscreen/edt-ft5x06.c
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+++ b/drivers/input/touchscreen/edt-ft5x06.c
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@@ -69,6 +69,8 @@
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#define EDT_RAW_DATA_RETRIES 100
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#define EDT_RAW_DATA_DELAY 1000 /* usec */
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+#define POLL_INTERVAL_MS 17 /* 17ms = 60fps */
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+
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enum edt_pmode {
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EDT_PMODE_NOT_SUPPORTED,
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EDT_PMODE_HIBERNATE,
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@@ -126,6 +128,9 @@ struct edt_ft5x06_ts_data {
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struct edt_reg_addr reg_addr;
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enum edt_ver version;
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+
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+ struct timer_list timer;
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+ struct work_struct work_i2c_poll;
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};
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struct edt_i2c_chip_data {
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@@ -275,6 +280,22 @@ out:
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return IRQ_HANDLED;
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}
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+static void edt_ft5x06_ts_irq_poll_timer(struct timer_list *t)
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+{
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+ struct edt_ft5x06_ts_data *tsdata = from_timer(tsdata, t, timer);
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+
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+ schedule_work(&tsdata->work_i2c_poll);
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+ mod_timer(&tsdata->timer, jiffies + msecs_to_jiffies(POLL_INTERVAL_MS));
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+}
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+
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+static void edt_ft5x06_ts_work_i2c_poll(struct work_struct *work)
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+{
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+ struct edt_ft5x06_ts_data *tsdata = container_of(work,
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+ struct edt_ft5x06_ts_data, work_i2c_poll);
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+
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+ edt_ft5x06_ts_isr(0, tsdata);
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+}
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+
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static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata,
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u8 addr, u8 value)
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{
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@@ -1221,17 +1242,27 @@ static int edt_ft5x06_ts_probe(struct i2
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i2c_set_clientdata(client, tsdata);
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- irq_flags = irq_get_trigger_type(client->irq);
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- if (irq_flags == IRQF_TRIGGER_NONE)
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- irq_flags = IRQF_TRIGGER_FALLING;
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- irq_flags |= IRQF_ONESHOT;
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-
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- error = devm_request_threaded_irq(&client->dev, client->irq,
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- NULL, edt_ft5x06_ts_isr, irq_flags,
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- client->name, tsdata);
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- if (error) {
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- dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
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- return error;
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+ if (client->irq) {
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+ irq_flags = irq_get_trigger_type(client->irq);
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+ if (irq_flags == IRQF_TRIGGER_NONE)
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+ irq_flags = IRQF_TRIGGER_FALLING;
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+ irq_flags |= IRQF_ONESHOT;
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+
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+ error = devm_request_threaded_irq(&client->dev, client->irq,
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+ NULL, edt_ft5x06_ts_isr,
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+ irq_flags, client->name,
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+ tsdata);
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+ if (error) {
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+ dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
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+ return error;
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+ }
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+ } else {
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+ INIT_WORK(&tsdata->work_i2c_poll,
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+ edt_ft5x06_ts_work_i2c_poll);
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+ timer_setup(&tsdata->timer, edt_ft5x06_ts_irq_poll_timer, 0);
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+ tsdata->timer.expires = jiffies +
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+ msecs_to_jiffies(POLL_INTERVAL_MS);
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+ add_timer(&tsdata->timer);
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}
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error = devm_device_add_group(&client->dev, &edt_ft5x06_attr_group);
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