From 109b1283fb532ac773a076748ffccf76a7067cab Mon Sep 17 00:00:00 2001 From: Wei Ni Date: Fri, 15 Nov 2013 10:40:39 +0100 Subject: 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 Signed-off-by: Jean Delvare --- drivers/hwmon/lm90.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'drivers/hwmon') diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c index 5e414ca80a7..499f473e078 100644 --- a/drivers/hwmon/lm90.c +++ b/drivers/hwmon/lm90.c @@ -89,6 +89,7 @@ #include #include #include +#include /* * 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: -- cgit v1.2.3-18-g5258