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usb: typec: tps6598x: Add support for polling interrupts status

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Some development boards don't have the interrupt line connected.

In such cases we can resort to polling the interrupt status.

Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20230324131853.41102-1-rogerq@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Aswath Govindraju 2023-03-24 15:18:53 +02:00 committed by Greg Kroah-Hartman
parent 97318d6427
commit 0d6a119cec
1 changed files with 36 additions and 5 deletions
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41
drivers/usb/typec/tipd/core.c
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@ -16,6 +16,7 @@
#include <linux/usb/typec.h>
#include <linux/usb/typec_altmode.h>
#include <linux/usb/role.h>
#include <linux/workqueue.h>
#include "tps6598x.h"
#include "trace.h"
@ -97,6 +98,8 @@ struct tps6598x {
int wakeup;
u16 pwr_status;
struct delayed_work wq_poll;
irq_handler_t irq_handler;
};
static enum power_supply_property tps6598x_psy_props[] = {
@ -558,6 +561,18 @@ err_unlock:
return IRQ_NONE;
}
/* Time interval for Polling */
#define POLL_INTERVAL 500 /* msecs */
static void tps6598x_poll_work(struct work_struct *work)
{
struct tps6598x *tps = container_of(to_delayed_work(work),
struct tps6598x, wq_poll);
tps->irq_handler(0, tps);
queue_delayed_work(system_power_efficient_wq,
&tps->wq_poll, msecs_to_jiffies(POLL_INTERVAL));
}
static int tps6598x_check_mode(struct tps6598x *tps)
{
char mode[5] = { };
@ -736,6 +751,7 @@ static int tps6598x_probe(struct i2c_client *client)
TPS_REG_INT_PLUG_EVENT;
}
tps->irq_handler = irq_handler;
/* Make sure the controller has application firmware running */
ret = tps6598x_check_mode(tps);
if (ret)
@ -827,10 +843,18 @@ static int tps6598x_probe(struct i2c_client *client)
dev_err(&client->dev, "failed to register partner\n");
}
ret = devm_request_threaded_irq(&client->dev, client->irq, NULL,
irq_handler,
IRQF_SHARED | IRQF_ONESHOT,
dev_name(&client->dev), tps);
if (client->irq) {
ret = devm_request_threaded_irq(&client->dev, client->irq, NULL,
irq_handler,
IRQF_SHARED | IRQF_ONESHOT,
dev_name(&client->dev), tps);
} else {
dev_warn(tps->dev, "Unable to find the interrupt, switching to polling\n");
INIT_DELAYED_WORK(&tps->wq_poll, tps6598x_poll_work);
queue_delayed_work(system_power_efficient_wq, &tps->wq_poll,
msecs_to_jiffies(POLL_INTERVAL));
}
if (ret)
goto err_disconnect;
@ -838,7 +862,7 @@ static int tps6598x_probe(struct i2c_client *client)
fwnode_handle_put(fwnode);
tps->wakeup = device_property_read_bool(tps->dev, "wakeup-source");
if (tps->wakeup) {
if (tps->wakeup && client->irq) {
device_init_wakeup(&client->dev, true);
enable_irq_wake(client->irq);
}
@ -877,6 +901,9 @@ static int __maybe_unused tps6598x_suspend(struct device *dev)
enable_irq_wake(client->irq);
}
if (!client->irq)
cancel_delayed_work_sync(&tps->wq_poll);
return 0;
}
@ -890,6 +917,10 @@ static int __maybe_unused tps6598x_resume(struct device *dev)
enable_irq(client->irq);
}
if (client->irq)
queue_delayed_work(system_power_efficient_wq, &tps->wq_poll,
msecs_to_jiffies(POLL_INTERVAL));
return 0;
}