netdev - Re: [PATCH net-next 3/3] dpll: zl3073x: Implement device mode setting support

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Message-ID: <0db2bd26-07c4-4181-8f83-95d7d2cbd629@redhat.com>
Date: Mon, 12 Jan 2026 14:27:46 +0100
From: Ivan Vecera <ivecera@...hat.com>
To: Vadim Fedorenko <vadim.fedorenko@...ux.dev>, netdev@...r.kernel.org
Cc: Donald Hunter <donald.hunter@...il.com>, Jakub Kicinski
 <kuba@...nel.org>, "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
 Simon Horman <horms@...nel.org>,
 Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>,
 Jiri Pirko <jiri@...nulli.us>,
 Prathosh Satish <Prathosh.Satish@...rochip.com>, Petr Oros
 <poros@...hat.com>, linux-kernel@...r.kernel.org,
 Michal Schmidt <mschmidt@...hat.com>
Subject: Re: [PATCH net-next 3/3] dpll: zl3073x: Implement device mode setting
 support

On 1/12/26 12:37 PM, Vadim Fedorenko wrote:
>> +    if (mode == DPLL_MODE_MANUAL) {
>> +        /* We are switching from automatic to manual mode:
>> +         * - if we have a valid reference selected during auto mode then
>> +         *   we will switch to forced reference lock mode and use this
>> +         *   reference for selection
>> +         * - if NO valid reference is selected, we will switch to forced
>> +         *   holdover mode or freerun mode, depending on the current
>> +         *   lock status
>> +         */
>> +        if (ZL3073X_DPLL_REF_IS_VALID(ref))
>> +            hw_mode = ZL_DPLL_MODE_REFSEL_MODE_REFLOCK;
>> +        else if (zldpll->lock_status == DPLL_LOCK_STATUS_UNLOCKED)
>> +            hw_mode = ZL_DPLL_MODE_REFSEL_MODE_FREERUN;
>> +        else
>> +            hw_mode = ZL_DPLL_MODE_REFSEL_MODE_HOLDOVER;
>> +    } else {
>> +        /* We are switching from manual to automatic mode:
>> +         * - if there is a valid reference selected then ensure that
>> +         *   it is selectable after switch to automatic mode
>> +         * - switch to automatic mode
>> +         */
>> +        struct zl3073x_dpll_pin *pin;
>> +
>> +        pin = zl3073x_dpll_pin_get_by_ref(zldpll, ref);
>> +        if (pin && !pin->selectable) {
>> +            /* Restore pin priority in HW */
>> +            rc = zl3073x_dpll_ref_prio_set(pin, pin->prio);
>> +            if (rc)
>> +                return rc;
> 
> I think it's better to fill-up extack here to give at least some info of
> what's happened?

Will add, thanks for pointing this out.

Ivan