linux-kernel - Re: [PATCH] hwmon: (pmbus/bel-pfe) Enable PMBUS_SKIP_STATUS

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Date:   Fri, 4 Aug 2023 15:17:15 -0700
From:   Tao Ren <rentao.bupt@...il.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Jean Delvare <jdelvare@...e.com>, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org, taoren@...a.com
Subject: Re: [PATCH] hwmon: (pmbus/bel-pfe) Enable PMBUS_SKIP_STATUS_CHECK
 for pfe1100

Hi Guenter,

Thank you for the quick review, and I've addressed your comments in v2.


Cheers,
Tao

On Fri, Aug 04, 2023 at 08:19:40AM -0700, Guenter Roeck wrote:
> On 8/3/23 16:55, rentao.bupt@...il.com wrote:
> > From: Tao Ren <rentao.bupt@...il.com>
> > 
> > Enable PMBUS_SKIP_STATUS_CHECK flag for both pfe1100 and pfe3000 because
> > the similar communication error is observed on pfe1100 devices.
> > 
> > Signed-off-by: Tao Ren <rentao.bupt@...il.com>
> > ---
> >   drivers/hwmon/pmbus/bel-pfe.c | 6 +++---
> >   1 file changed, 3 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/hwmon/pmbus/bel-pfe.c b/drivers/hwmon/pmbus/bel-pfe.c
> > index fa5070ae26bc..8280d274da3f 100644
> > --- a/drivers/hwmon/pmbus/bel-pfe.c
> > +++ b/drivers/hwmon/pmbus/bel-pfe.c
> > @@ -17,12 +17,12 @@
> >   enum chips {pfe1100, pfe3000};
> >   /*
> > - * Disable status check for pfe3000 devices, because some devices report
> > + * Disable status check for pfexxxx devices, because some devices report
> >    * communication error (invalid command) for VOUT_MODE command (0x20)
> >    * although correct VOUT_MODE (0x16) is returned: it leads to incorrect
> >    * exponent in linear mode.
> >    */
> 
> Rephrase to something like
> 
>  Disable status check because some devices ... linear mode.
>  This affects both pfe3000 and pfe1100.
> 
> We don't know if other pfe devices will be supported by the driver in the
> future, and we don't know if those will be affected, so we should not make
> any claims about such devices.
> 
> > -static struct pmbus_platform_data pfe3000_plat_data = {
> > +static struct pmbus_platform_data pfe_plat_data = {
> >   	.flags = PMBUS_SKIP_STATUS_CHECK,
> >   };
> > @@ -94,6 +94,7 @@ static int pfe_pmbus_probe(struct i2c_client *client)
> >   	int model;
> >   	model = (int)i2c_match_id(pfe_device_id, client)->driver_data;
> > +	client->dev.platform_data = &pfe_plat_data;
> >   	/*
> >   	 * PFE3000-12-069RA devices may not stay in page 0 during device
> > @@ -101,7 +102,6 @@ static int pfe_pmbus_probe(struct i2c_client *client)
> >   	 * So let's set the device to page 0 at the beginning.
> >   	 */
> >   	if (model == pfe3000) {
> > -		client->dev.platform_data = &pfe3000_plat_data;
> >   		i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0);
> >   	}
> 
> { } is no longer needed.
> 
> Thanks,
> Guenter
>