linux-kernel - Re: [PATCH] pci, acpi: QDF2xxx 32 bit config space accessors

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Date:	Tue, 19 Jan 2016 15:19:38 -0500
From:	Christopher Covington <cov@...eaurora.org>
To:	Jon Masters <jcm@...hat.com>
Cc:	Tomasz Nowicki <tn@...ihalf.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <lenb@...nel.org>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	Timur Tabi <timur@...eaurora.org>,
	Mark Langsdorf <mlangsdo@...hat.com>,
	Sinan Kaya <okaya@...eaurora.org>
Subject: Re: [PATCH] pci, acpi: QDF2xxx 32 bit config space accessors

[Fixing Jon's email; sorry for the typo.]

On 01/19/2016 02:54 PM, Christopher Covington wrote:
> Qualcomm Technologies QDF2xxx SoCs require 32 bit accessors to be used
> for the PCI configuration space. Register the appropriate quirk.
> 
> Signed-off-by: Christopher Covington <cov@...eaurora.org>
> ---
> This patch depends on Tomasz Nowicki's ACPI support for PCI:
> 
> http://lists.infradead.org/pipermail/linux-arm-kernel/2016-January/thread.html#399200
> 
>  drivers/acpi/mcfg.c | 23 +++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
> 
> diff --git a/drivers/acpi/mcfg.c b/drivers/acpi/mcfg.c
> index ec5fe7b..dee4964 100644
> --- a/drivers/acpi/mcfg.c
> +++ b/drivers/acpi/mcfg.c
> @@ -78,6 +78,29 @@ static struct pci_ops default_pci_mcfg_ops = {
>  	.write = pci_generic_config_write,
>  };
>  
> +static const struct dmi_system_id qcom_qdf2xxx[] = {
> +	{
> +		.ident = "Qualcomm Technologies QDF2xxx",
> +		.matches = {
> +			DMI_MATCH(DMI_SYS_VENDOR, "Qualcomm"),
> +			DMI_MATCH(DMI_PRODUCT_NAME, "QDF2"),
> +		},
> +	},
> +	{ }
> +};
> +
> +static struct pci_ops qcom_qdf2xxx_pci_mcfg_ops = {
> +	.map_bus = pci_mcfg_dev_base,
> +	.read = pci_generic_config_read32,
> +	.write = pci_generic_config_write32,
> +};
> +
> +DECLARE_ACPI_MCFG_FIXUP(qcom_qdf2xxx,
> +			NULL,
> +			&qcom_qdf2xxx_pci_mcfg_ops,
> +			PCI_MCFG_DOMAIN_ANY,
> +			PCI_MCFG_BUS_ANY);
> +
>  struct pci_ops *pci_mcfg_get_ops(struct acpi_pci_root *root)
>  {
>  	struct pci_ops *pci_mcfg_ops_quirk;
> 


-- 
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