Messages in this thread Patch in this message | | | From | Wei Ni <> | Subject | [PATCH v3 3/4] hwmon: (lm90) add support to handle IRQ | Date | Fri, 12 Jul 2013 15:48:06 +0800 |
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When the temperature exceed the limit range value, the driver can handle the interrupt.
Signed-off-by: Wei Ni <wni@nvidia.com> --- drivers/hwmon/lm90.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c index c90037f..1cc3d19 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 @@ -1460,6 +1461,17 @@ static bool lm90_is_tripped(struct i2c_client *client) return true; } +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); + + 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) { @@ -1536,6 +1548,18 @@ 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
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