linux-kernel - Re: [PATCH v4 8/8] i2c: designware: Add doorbell support for Skyrim

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Message-ID: <ZA8KQIeRUtAXbkTV@smile.fi.intel.com>
Date:   Mon, 13 Mar 2023 13:34:24 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Jarkko Nikula <jarkko.nikula@...ux.intel.com>
Cc:     Mario Limonciello <mario.limonciello@....com>,
        Jan Dąbroś <jsd@...ihalf.com>,
        Grzegorz Bernacki <gjb@...ihalf.com>, Rijo-john.Thomas@....com,
        Thomas.Lendacky@....com, herbert@...dor.apana.org.au,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Felix.Held@....com, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 8/8] i2c: designware: Add doorbell support for Skyrim

On Mon, Mar 13, 2023 at 12:29:50PM +0200, Jarkko Nikula wrote:
> On 3/10/23 23:19, Mario Limonciello wrote:

...

> > +	if (rdev->device == 0x1630)
> > +		_psp_send_i2c_req = psp_send_i2c_req_cezanne;
> > +	else
> > +		_psp_send_i2c_req = psp_send_i2c_req_skyrim;
> 
> Is there any possibility pci_get_domain_bus_and_slot() returns NULL? Or is
> 00:00.0 always present?

Theoretically it's possible in two cases (or more?):
1) no PCI support compiled;
2) no device found (PCI-less system).

-- 
With Best Regards,
Andy Shevchenko