Add support to handle irq. When the temperature touch
the limit value, the driver can handle the interrupt.
Signed-off-by: Wei Ni <wni@xxxxxxxxxx>
---
drivers/hwmon/lm90.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index 2cb7f8e..fce9dfa 100644
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -89,6 +89,7 @@
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
+#include <linux/interrupt.h>
/*
* Addresses to scan
@@ -1423,6 +1424,18 @@ static void lm90_init_client(struct i2c_client *client)
i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config);
}
+static void lm90_alert(struct i2c_client *client, unsigned int flag);
+
+static irqreturn_t lm90_irq_thread(int irq, void *dev_id)
+{
+ struct lm90_data *data = dev_id;
+ struct i2c_client *client = to_i2c_client(data->hwmon_dev->parent);
+
+ lm90_alert(client, 0);
+
+ return IRQ_HANDLED;
+}
+
static int lm90_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -1499,6 +1512,18 @@ static int lm90_probe(struct i2c_client *client,
goto exit_remove_files;
}
+ if (client->irq >= 0) {
+ dev_dbg(dev, "lm90 irq: %d\n", client->irq);
+ err = devm_request_threaded_irq(dev, client->irq,
+ NULL, lm90_irq_thread,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ "lm90", data);
+ if (err < 0) {
+ dev_err(dev, "cannot request interrupt\n");
+ goto exit_remove_files;
+ }
+ }
+
return 0;
exit_remove_files:
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-tegra" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
