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

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Message-Id: <1453233259-29562-1-git-send-email-cov@codeaurora.org>
Date:	Tue, 19 Jan 2016 14:54:19 -0500
From:	Christopher Covington <cov@...eaurora.org>
To:	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
Cc:	linux-arm-msm@...r.kernel.org, Timur Tabi <timur@...eaurora.org>,
	Jon Masters <jcm@...hat.org>,
	Mark Langsdorf <mlangsdo@...hat.com>,
	Sinan Kaya <okaya@...eaurora.org>,
	Christopher Covington <cov@...eaurora.org>
Subject: [PATCH] pci, acpi: QDF2xxx 32 bit config space accessors

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;
-- 
Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project