diff options
| author | Wei Ni <wni@nvidia.com> | 2013-11-15 10:40:39 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@endymion.delvare> | 2013-11-15 10:40:39 +0100 |
| commit | 109b1283fb532ac773a076748ffccf76a7067cab (patch) | |
| tree | eac9cb5461c345f8806733a2d3cf25ee2d86a78c /drivers/hwmon/lm90.c | |
| parent | 072de4969f431c5ab4cbbcd9cd5af6e960c665c2 (diff) | |
hwmon: (lm90) Add support to handle IRQ
When the temperature exceed the limit range value,
the driver can handle the interrupt.
Signed-off-by: Wei Ni <wni@nvidia.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon/lm90.c')
| -rw-r--r-- | drivers/hwmon/lm90.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c index 5e414ca80a78..499f473e0780 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 @@ -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: |