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Message-ID: <27b12115-14cc-9c9c-a645-30a6ec018ddb@9elements.com>
Date: Wed, 30 Nov 2022 23:55:34 +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 11:49 pm, Guenter Roeck wrote:
> On Wed, Nov 30, 2022 at 11:42:32PM +0530, Naresh Solanki wrote:
>> 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.
>
> You added a check for PB_STATUS_VIN_UV which reports an input failure
> which was not reported before. You do so silently without mentioning the
> change in the description. In the change log you claim "Remove status input".
> Yet, the above adds reporting on an input voltage error. Maybe the
> change log was supposed to refer to the input status register, but that
> doesn't mean you can silently add a check for PB_STATUS_VIN_UV.
Right. I removed STATUS_INPUT but overlooked VIN in STATUS_BYTE.
Will fix this in next revision.
>
> Guenter
>
>>>> + { },
>>>> + },
>>>> + }, {
>>>> .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
Regards,
Naresh
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