From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wei Ni Subject: [PATCH 2/3] hwmon: (lm90) add support to handle irq Date: Thu, 4 Jul 2013 15:57:49 +0800 Message-ID: <1372924670-16355-3-git-send-email-wni@nvidia.com> References: <1372924670-16355-1-git-send-email-wni@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1372924670-16355-1-git-send-email-wni-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org, khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org, acourbot-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org Cc: swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org, MLongnecker-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org, lm-sensors-GZX6beZjE8VD60Wz+7aTrA@public.gmane.org, linux-kernel-u79uwXL29TZX6JHB/w77yyCwEArCW2h5@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Wei Ni List-Id: linux-tegra@vger.kernel.org Add support to handle irq. When the temperature touch the limit value, the driver can handle the interrupt. Signed-off-by: Wei Ni --- 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 #include #include +#include /* * 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