linux-kernel - Re: [PATCH v2 5/7] hwmon: (lm90) Introduce 3rd set of upper temperature limits

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Message-ID: <20100914114634.GA4586@ericsson.com>
Date:	Tue, 14 Sep 2010 04:46:34 -0700
From:	Guenter Roeck <guenter.roeck@...csson.com>
To:	Jean Delvare <khali@...ux-fr.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	"lm-sensors@...sensors.org" <lm-sensors@...sensors.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 5/7] hwmon: (lm90) Introduce 3rd set of upper
 temperature limits

Hi Jean,

On Tue, Sep 14, 2010 at 06:51:37AM -0400, Jean Delvare wrote:
> Hi Guenter,
> 
> On Thu, 9 Sep 2010 06:25:48 -0700, Guenter Roeck wrote:
> > Signed-off-by: Guenter Roeck <guenter.roeck@...csson.com>
> > ---
> >  drivers/hwmon/lm90.c |   34 ++++++++++++++++++++++++++++++++--
> >  1 files changed, 32 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
> > index 11b5701..d2bcb47 100644
> > --- a/drivers/hwmon/lm90.c
> > +++ b/drivers/hwmon/lm90.c
> > @@ -147,6 +147,7 @@ enum chips { lm90, adm1032, lm99, lm86, max6657, adt7461, max6680, max6646,
> >  #define	LM90_HAVE_OFFSET	0x02	/* temperature offset register	*/
> >  #define	LM90_HAVE_LOCAL_EXT	0x04	/* extended local temperature	*/
> >  #define	LM90_HAVE_REM_LIMIT_EXT	0x08	/* extended remote limit	*/
> > +#define	LM90_HAVE_EMERGENCY	0x10	/* 3rd upper (emergency) limit	*/
> >  
> >  /*
> >   * Functions declaration
> > @@ -213,10 +214,12 @@ struct lm90_data {
> >  	u8 alert_alarms;	/* Which alarm bits trigger ALERT# */
> >  
> >  	/* registers values */
> > -	s8 temp8[4];	/* 0: local low limit
> > +	s8 temp8[6];	/* 0: local low limit
> >  			   1: local high limit
> >  			   2: local critical limit
> > -			   3: remote critical limit */
> > +			   3: remote critical limit
> > +			   4: local emergency limit
> > +			   5: remote emergency limit */
> >  	s16 temp11[5];	/* 0: remote input
> >  			   1: remote low limit
> >  			   2: remote high limit
> > @@ -608,6 +611,24 @@ static const struct attribute_group lm90_group = {
> >  	.attrs = lm90_attributes,
> >  };
> >  
> > +/*
> > + * Additional attributes for devices with emergency sensors
> > + */
> > +static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8,
> > +	set_temp8, 4);
> > +static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8,
> > +	set_temp8, 5);
> > +
> > +static struct attribute *lm90_emergency_attributes[] = {
> > +	&sensor_dev_attr_temp1_emergency.dev_attr.attr,
> > +	&sensor_dev_attr_temp2_emergency.dev_attr.attr,
> > +	NULL
> > +};
> > +
> > +static const struct attribute_group lm90_emergency_group = {
> > +	.attrs = lm90_emergency_attributes,
> > +};
> > +
> >  /* pec used for ADM1032 only */
> >  static ssize_t show_pec(struct device *dev, struct device_attribute *dummy,
> >  			char *buf)
> > @@ -818,6 +839,9 @@ static int lm90_detect(struct i2c_client *new_client,
> >  
> >  static void lm90_remove_files(struct i2c_client *client, struct lm90_data *data)
> >  {
> > +	if (data->flags & LM90_HAVE_EMERGENCY)
> > +		sysfs_remove_group(&client->dev.kobj,
> > +				   &lm90_emergency_group);
> >  	if (data->flags & LM90_HAVE_OFFSET)
> >  		device_remove_file(&client->dev,
> >  				   &sensor_dev_attr_temp2_offset.dev_attr);
> 
> But this flag is never set?
> 
Assuming you mean LM90_HAVE_EMERGENCY, will be set with patch #6.
Feel free to merge the two if you prefer.

Guenter

> > @@ -889,6 +913,12 @@ static int lm90_probe(struct i2c_client *new_client,
> >  		if (err)
> >  			goto exit_remove_files;
> >  	}
> > +	if (data->flags & LM90_HAVE_EMERGENCY) {
> > +		err = sysfs_create_group(&new_client->dev.kobj,
> > +					 &lm90_emergency_group);
> > +		if (err)
> > +			goto exit_remove_files;
> > +	}
> >  
> >  	data->hwmon_dev = hwmon_device_register(&new_client->dev);
> >  	if (IS_ERR(data->hwmon_dev)) {
> 
> -- 
> Jean Delvare
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