From:   Krishna Yarlagadda <kyarlagadda@nvidia.com>
To:     Mark Brown <broonie@kernel.org>
CC:     Laxman Dewangan <ldewangan@nvidia.com>,
        Thierry Reding <thierry.reding@gmail.com>,
        Jonathan Hunter <jonathanh@nvidia.com>,
        Sowjanya Komatineni <skomatineni@nvidia.com>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        "linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>,
        "linux-spi@vger.kernel.org" <linux-spi@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH 2/2] spi: tegra210-quad: add acpi support
Thread-Topic: [PATCH 2/2] spi: tegra210-quad: add acpi support
Thread-Index: AQHX4eK2PmZ2lQM7W06Rx2eVyKwOx6wUNK6AgAYJLMA=
Date:   Mon, 29 Nov 2021 09:09:30 +0000
Message-ID: <BN6PR12MB124973BF5CBB4AB35CC59B8AC3669@BN6PR12MB1249.namprd12.prod.outlook.com>
References: <1637834152-32093-1-git-send-email-kyarlagadda@nvidia.com>
 <1637834152-32093-2-git-send-email-kyarlagadda@nvidia.com>
 <YZ+ImY1LrvB5a5iF@sirena.org.uk>
In-Reply-To: <YZ+ImY1LrvB5a5iF@sirena.org.uk>
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> -----Original Message-----
> From: Mark Brown <broonie@kernel.org>
> Sent: 25 November 2021 18:29
> To: Krishna Yarlagadda <kyarlagadda@nvidia.com>
> Cc: Laxman Dewangan <ldewangan@nvidia.com>; Thierry Reding
> <thierry.reding@gmail.com>; Jonathan Hunter <jonathanh@nvidia.com>;
> Sowjanya Komatineni <skomatineni@nvidia.com>; Philipp Zabel
> <p.zabel@pengutronix.de>; linux-tegra@vger.kernel.org; linux-
> spi@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH 2/2] spi: tegra210-quad: add acpi support
>=20
> On Thu, Nov 25, 2021 at 03:25:52PM +0530, Krishna Yarlagadda wrote:
>=20
> > +#ifdef CONFIG_ACPI
> > +	if (ACPI_FAILURE(acpi_evaluate_object(ACPI_HANDLE(tqspi->dev),
> > +					      "_RST", NULL, NULL)))
> > +		dev_err(tqspi->dev, "failed to reset device\n"); #endif
>=20
> What happens when this runs on a DT system?
For a DT system reset handle would be present and this code will not run
-KY