linux-kernel - RE: [patch] hwmon: (pmbus) Add explicit support for DPS-460, DPS-800, and SGD009

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Date:	Mon, 25 Jul 2016 08:56:01 +0000
From:	Vadim Pasternak <vadimp@...lanox.com>
To:	Jean Delvare <jdelvare@...e.de>
CC:	"linux@...ck-us.net" <linux@...ck-us.net>,
	"linux-hwmon@...r.kernel.org" <linux-hwmon@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"jiri@...nulli.us" <jiri@...nulli.us>
Subject: RE: [patch] hwmon: (pmbus) Add explicit support for DPS-460, DPS-800,
 and SGD009



> -----Original Message-----
> From: Jean Delvare [mailto:jdelvare@...e.de]
> Sent: Monday, July 25, 2016 11:32 AM
> To: Vadim Pasternak <vadimp@...lanox.com>
> Cc: linux@...ck-us.net; linux-hwmon@...r.kernel.org; linux-
> kernel@...r.kernel.org; jiri@...nulli.us
> Subject: Re: [patch] hwmon: (pmbus) Add explicit support for DPS-460, DPS-800,
> and SGD009
> 
> Hi Vadim,

Hi Jean,
Thank you for your comments.
Will resend modified patch. 

> 
> On Mon, 25 Jul 2016 08:10:29 +0000, Vadim Pasternak wrote:
> > Provide support for PSU DPS-460, DPS-800 from Delta Electronics, INC
> > and for
> > SGD009 from Acbel Polytech, INC.
> > These devices do not support the STATUS_CML register, and reports a
> > communication error in response to this command.
> > For this reason, the status register check is disabled for these controllers.
> >
> > Signed-off-by: Vadim Pasternak <vadimp@...lanox.com>
> > Reviewed-by: Jiri Pirko <jiri@...lanox.com>
> > ---
> >  drivers/hwmon/pmbus/pmbus.c | 17 +++++++++++++++++
> >  1 file changed, 17 insertions(+)
> >
> > diff --git a/drivers/hwmon/pmbus/pmbus.c b/drivers/hwmon/pmbus/pmbus.c
> > index 0a74991..f28de37 100644
> > --- a/drivers/hwmon/pmbus/pmbus.c
> > +++ b/drivers/hwmon/pmbus/pmbus.c
> > @@ -25,6 +25,7 @@
> >  #include <linux/slab.h>
> >  #include <linux/mutex.h>
> >  #include <linux/i2c.h>
> > +#include <linux/i2c/pmbus.h>
> >  #include "pmbus.h"
> >
> >  /*
> > @@ -167,14 +168,27 @@ static int pmbus_probe(struct i2c_client *client,
> >  		       const struct i2c_device_id *id)  {
> >  	struct pmbus_driver_info *info;
> > +	struct pmbus_platform_data *pdata = NULL;
> > +	struct device *dev = &client->dev;
> >
> >  	info = devm_kzalloc(&client->dev, sizeof(struct pmbus_driver_info),
> >  			    GFP_KERNEL);
> >  	if (!info)
> >  		return -ENOMEM;
> 
> A blank line here would improve readability IMHO.
> 
> > +	if (!strcmp(id->name, "dps460") || !strcmp(id->name, "dps800") ||
> > +	    !strcmp(id->name, "sgd009")) {
> > +		pdata = devm_kzalloc(&client->dev,
> 
> You have defined dev, you might as well use it here, and also in the other
> devm_kzalloc call.
> 
> > +				     sizeof(struct pmbus_platform_data),
> > +				     GFP_KERNEL);
> > +		if (!pdata)
> > +			return -ENOMEM;
> > +
> > +		pdata->flags = PMBUS_SKIP_STATUS_CHECK;
> > +	}
> >
> >  	info->pages = id->driver_data;
> >  	info->identify = pmbus_identify;
> > +	dev->platform_data = pdata;
> >
> >  	return pmbus_do_probe(client, id, info);  } @@ -186,6 +200,8 @@
> > static const struct i2c_device_id pmbus_id[] = {
> >  	{"adp4000", 1},
> >  	{"bmr453", 1},
> >  	{"bmr454", 1},
> > +	{"dps460", 1},
> > +	{"dps800", 1},
> >  	{"mdt040", 1},
> >  	{"ncp4200", 1},
> >  	{"ncp4208", 1},
> > @@ -193,6 +209,7 @@ static const struct i2c_device_id pmbus_id[] = {
> >  	{"pdt006", 1},
> >  	{"pdt012", 1},
> >  	{"pmbus", 0},
> > +	{"sgd009", 1},
> >  	{"tps40400", 1},
> >  	{"tps544b20", 1},
> >  	{"tps544b25", 1},
> 
> (non-authoritative)
> Reviewed-by: Jean Delvare <jdelvare@...e.de>
> 
> --
> Jean Delvare
> SUSE L3 Support