linux-kernel - Re: [PATCH v3 1/4] hwmon: (pmbus/core): Add status byte to regulator flag map

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Date:   Wed, 30 Nov 2022 23:42:32 +0530
From:   Naresh Solanki <naresh.solanki@...ements.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     devicetree@...r.kernel.org, Jean Delvare <jdelvare@...e.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
        linux-hwmon@...r.kernel.org,
        Patrick Rudolph <patrick.rudolph@...ements.com>
Subject: Re: [PATCH v3 1/4] hwmon: (pmbus/core): Add status byte to regulator
 flag map

Hi,

On 30-11-2022 11:36 pm, Guenter Roeck wrote:
> On Wed, Nov 30, 2022 at 05:58:28PM +0100, Naresh Solanki wrote:
>> Add PMBus status byte to regulator flag map.
>>
>> Signed-off-by: Naresh Solanki <Naresh.Solanki@...ements.com>
>>
>> ---
>> Changes:
>> - Remove status input
> 
> Not really.
> 
This was about PMBUS_STATUS_INPUT & not STATUS_BYTE
>> - Add comment for PMBUS status byte.
>> ---
>>   drivers/hwmon/pmbus/pmbus_core.c | 20 +++++++++++---------
>>   1 file changed, 11 insertions(+), 9 deletions(-)
>>
>> diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
>> index 95e95783972a..a7b4ae0f1f3b 100644
>> --- a/drivers/hwmon/pmbus/pmbus_core.c
>> +++ b/drivers/hwmon/pmbus/pmbus_core.c
>> @@ -2751,7 +2751,16 @@ struct pmbus_regulator_status_category {
>>   };
>>   
>>   static const struct pmbus_regulator_status_category pmbus_regulator_flag_map[] = {
>> -	{
>> +	{	/* STATUS byte is always present. */
>> +		.func = -1,
>> +		.reg = PMBUS_STATUS_BYTE,
>> +		.bits = (const struct pmbus_regulator_status_assoc[]) {
>> +			{ PB_STATUS_IOUT_OC,   REGULATOR_ERROR_OVER_CURRENT },
>> +			{ PB_STATUS_VOUT_OV,   REGULATOR_ERROR_REGULATION_OUT },
>> +			{ PB_STATUS_VIN_UV,    REGULATOR_ERROR_UNDER_VOLTAGE },
> 
> Still there.
> 
STATUS_INPUT remove & STATUS_BYTE retained.
>> +			{ },
>> +		},
>> +	}, {
>>   		.func = PMBUS_HAVE_STATUS_VOUT,
>>   		.reg = PMBUS_STATUS_VOUT,
>>   		.bits = (const struct pmbus_regulator_status_assoc[]) {
>> @@ -2768,6 +2777,7 @@ static const struct pmbus_regulator_status_category pmbus_regulator_flag_map[] =
>>   			{ PB_IOUT_OC_WARNING,    REGULATOR_ERROR_OVER_CURRENT_WARN },
>>   			{ PB_IOUT_OC_FAULT,      REGULATOR_ERROR_OVER_CURRENT },
>>   			{ PB_IOUT_OC_LV_FAULT,   REGULATOR_ERROR_OVER_CURRENT },
>> +			{ PB_POUT_OP_FAULT,      REGULATOR_ERROR_FAIL },
> 
> Please document your changes in the description. There are two functional
> changes hidden under "Add PMBus status byte to regulator flag map".
> That is inappropriate. Those, as I have pointed out, should be separate
> patches.
My bad. I kept this change in this patch. Will remove this from this patch.
> 
> Guenter
> 
>>   			{ },
>>   		},
>>   	}, {
>> @@ -2834,14 +2844,6 @@ static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned
>>   		if (status & PB_STATUS_POWER_GOOD_N)
>>   			*flags |= REGULATOR_ERROR_REGULATION_OUT;
>>   	}
>> -	/*
>> -	 * Unlike most other status bits, PB_STATUS_{IOUT_OC,VOUT_OV} are
>> -	 * defined strictly as fault indicators (not warnings).
>> -	 */
>> -	if (status & PB_STATUS_IOUT_OC)
>> -		*flags |= REGULATOR_ERROR_OVER_CURRENT;
>> -	if (status & PB_STATUS_VOUT_OV)
>> -		*flags |= REGULATOR_ERROR_REGULATION_OUT;
>>   
>>   	/*
>>   	 * If we haven't discovered any thermal faults or warnings via
>>
>> base-commit: 9494c53e1389b120ba461899207ac8a3aab2632c
>> -- 
>> 2.37.3
>>

Regards,
Naresh