linux-kernel - Re: [PATCH v4 2/3] hwmon: (lm90) add support to handle IRQ

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Date:	Mon, 4 Nov 2013 10:34:34 +0100
From:	Jean Delvare <khali@...ux-fr.org>
To:	Wei Ni <wni@...dia.com>
Cc:	<linux@...ck-us.net>, <lm-sensors@...sensors.org>,
	<linux-kernel@...r.kernel.org>, <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH v4 2/3] hwmon: (lm90) add support to handle IRQ

Hi Wei,

I'm hitting a problem with that patch now...

On Wed, 7 Aug 2013 14:18:25 +0800, Wei Ni wrote:
> When the temperature exceed the limit range value,
> the driver can handle the interrupt.
> 
> Signed-off-by: Wei Ni <wni@...dia.com>
> ---
>  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))

Did you really send the latest version of the patch? lm90_is_tripped()
takes two arguments now, but here you only pass one.

If you have a more up-to-date version of this patch, please send it
over quickly.

> +		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:


-- 
Jean Delvare
--
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