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Commit 109b1283 authored by Wei Ni's avatar Wei Ni Committed by Jean Delvare
Browse files

hwmon: (lm90) Add support to handle IRQ 



When the temperature exceed the limit range value,
the driver can handle the interrupt.

Signed-off-by: default avatarWei Ni <wni@nvidia.com>
Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent 072de496

drivers/hwmon/lm90.c

+24 −0
Original line number Diff line number Diff line
@@ -89,6 +89,7 @@ 
#include <linux/err.h>

#include <linux/mutex.h>

#include <linux/sysfs.h>

#include <linux/interrupt.h>



/*

 * Addresses to scan
@@ -1445,6 +1446,17 @@ static bool lm90_is_tripped(struct i2c_client *client, u16 *status) 
	return true;

}



static irqreturn_t lm90_irq_thread(int irq, void *dev_id)

{

	struct i2c_client *client = dev_id;

	u16 status;



	if (lm90_is_tripped(client, &status))

		return IRQ_HANDLED;

	else

		return IRQ_NONE;

}



static int lm90_probe(struct i2c_client *client,

		      const struct i2c_device_id *id)

{
@@ -1521,6 +1533,18 @@ static int lm90_probe(struct i2c_client *client, 
		goto exit_remove_files;

	}



	if (client->irq) {

		dev_dbg(dev, "IRQ: %d\n", client->irq);

		err = devm_request_threaded_irq(dev, client->irq,

						NULL, lm90_irq_thread,

						IRQF_TRIGGER_LOW | IRQF_ONESHOT,

						"lm90", client);

		if (err < 0) {

			dev_err(dev, "cannot request IRQ %d\n", client->irq);

			goto exit_remove_files;

		}

	}



	return 0;



exit_remove_files: