When the temperature exceed the limit range value, the driver can handle the interrupt.
Signed-off-by: Wei Ni <[email protected]> --- drivers/hwmon/lm90.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c index 1da2eff..2e68773 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 @@ -1433,6 +1434,16 @@ static bool lm90_is_tripped(struct i2c_client *client) return true; } +static irqreturn_t lm90_irq_thread(int irq, void *dev_id) +{ + struct i2c_client *client = dev_id; + + if (lm90_is_tripped(client)) + return IRQ_HANDLED; + else + return IRQ_NONE; +} + static int lm90_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -1509,6 +1520,18 @@ 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: -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
