linux-kernel - Re: [PATCH v2] hwmon:(adm1275) Enable adm1278 ADM1278_TEMP1

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Date:   Fri, 5 Jun 2020 22:18:21 +0530
From:   Manikandan <manikandan.hcl.ers.epl@...il.com>
To:     Guenter Roeck <linux@...ck-us.net>, patrickw3@...com,
        vijaykhemka@...com
Cc:     linux-hwmon@...r.kernel.org, linux-aspeed@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, openbmc@...ts.ozlabs.org,
        saipsdasari@...com, manikandan.e@....com
Subject: Re: [PATCH v2] hwmon:(adm1275) Enable adm1278 ADM1278_TEMP1_EN

On Fri, May 29, 2020 at 10:30:16AM -0700, Guenter Roeck wrote:
> On 5/29/20 5:46 AM, Manikandan Elumalai wrote:
> > The adm1278 temperature sysfs attribute need it for one of the openbmc platform . 
> > This functionality is not enabled by default, so PMON_CONFIG needs to be modified in order to enable it.
> > 
> > Signed-off-by   : Manikandan Elumalai <manikandan.hcl.ers.epl@...il.com>
> 
> This is not valid.
> 
> > 
> > v2:
> >    - Add Signed-off-by.
> >    - Removed ADM1278_TEMP1_EN check.
> 
> checkpatch reports:
> 
> > ---WARNING: Possible unwrapped commit description (prefer a maximum 75 chars per line)
> #14:
> The adm1278 temperature sysfs attribute need it for one of the openbmc platform .
> 
> CHECK: Alignment should match open parenthesis
> #45: FILE: drivers/hwmon/pmbus/adm1275.c:679:
> +		ret = i2c_smbus_write_byte_data(client,
> +					ADM1275_PMON_CONFIG,
> 
> WARNING: suspect code indent for conditional statements (16, 16)
> #47: FILE: drivers/hwmon/pmbus/adm1275.c:681:
> +		if (ret < 0) {
> +		dev_err(&client->dev,
> 
> ERROR: Missing Signed-off-by: line(s)
> 
> total: 1 errors, 2 warnings, 1 checks, 33 lines checked
> 
> Please follow published guidelines when submitting patches.
> 
> >  drivers/hwmon/pmbus/adm1275.c | 21 +++++++++++++++++----
> >  1 file changed, 17 insertions(+), 4 deletions(-)
> > 
> > diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c
> > index 5caa37fb..ab5fceb 100644
> > --- a/drivers/hwmon/pmbus/adm1275.c
> > +++ b/drivers/hwmon/pmbus/adm1275.c
> > @@ -666,7 +666,23 @@ static int adm1275_probe(struct i2c_client *client,
> >  		tindex = 3;
> >  
> >  		info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
> > -			PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
> > +			PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
> > +			PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
> > +
> > +		config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
> > +		if (config < 0)
> > +			return config;
> > +
> > +		/* Enable TEMP1 by default */
> > +		config |= ADM1278_TEMP1_EN;
> > +		ret = i2c_smbus_write_byte_data(client,
> > +					ADM1275_PMON_CONFIG,
> > +					config);
> > +		if (ret < 0) {
> > +		dev_err(&client->dev,
> > +			"Failed to enable temperature config\n");
> > +		return -ENODEV;
> > +		}
> 
> This can be handled in a single operation, together with ADM1278_VOUT_EN
> below. There is no need for two separate write operations.
>
        Thanks for review Guenter, Patrick and Vijay.
        Sorry for delay response. 
        I have made changes to write ADM1278_VOUT_EN and ADM1278_TEMP1_EN in single
        operation and tested in platfrom .
        The changes given for quick look and will help if any misunderstand.

	--- a/drivers/hwmon/pmbus/adm1275.c
	+++ b/drivers/hwmon/pmbus/adm1275.c
	@@ -666,11 +666,11 @@ static int adm1275_probe(struct i2c_client *client,
 		tindex = 3;
 
 		info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
	-			PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
	+			PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | 
        +			PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
 
 		/* Enable VOUT if not enabled (it is disabled by default) */
 		if (!(config & ADM1278_VOUT_EN)) {
	-			config |= ADM1278_VOUT_EN;
	+			config |= (ADM1278_VOUT_EN | ADM1278_TEMP1_EN);
 			ret = i2c_smbus_write_byte_data(client,
 							ADM1275_PMON_CONFIG,
 							config);
	@@ -680,10 +680,6 @@ static int adm1275_probe(struct i2c_client *client,
 				return -ENODEV;
 			}
 		}
	-
	-		if (config & ADM1278_TEMP1_EN)
	-			info->func[0] |=
	-				PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
 		if (config & ADM1278_VIN_EN)
 			info->func[0] |= PMBUS_HAVE_VIN;
 		break; 
> Guenter
> 
> > 
> >  		/* Enable VOUT if not enabled (it is disabled by default) */
> >  		if (!(config & ADM1278_VOUT_EN)) {
> > @@ -681,9 +697,6 @@ static int adm1275_probe(struct i2c_client *client,
> >  			}
> >  		}
> >  
> > -		if (config & ADM1278_TEMP1_EN)
> > -			info->func[0] |=
> > -				PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
> >  		if (config & ADM1278_VIN_EN)
> >  			info->func[0] |= PMBUS_HAVE_VIN;
> >  		break;
> > 
>