linux-kernel - [PATCH V7 10/11] arm64, pci, acpi: Provide ACPI-specific prerequisites for PCI bus enumeration.

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Date:	Tue, 10 May 2016 17:20:00 +0200
From:	Tomasz Nowicki <tn@...ihalf.com>
To:	helgaas@...nel.org, arnd@...db.de, will.deacon@....com,
	catalin.marinas@....com, rafael@...nel.org, hanjun.guo@...aro.org,
	Lorenzo.Pieralisi@....com, okaya@...eaurora.org,
	jchandra@...adcom.com
Cc:	robert.richter@...iumnetworks.com, mw@...ihalf.com,
	Liviu.Dudau@....com, ddaney@...iumnetworks.com,
	wangyijing@...wei.com, Suravee.Suthikulpanit@....com,
	msalter@...hat.com, linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linaro-acpi@...ts.linaro.org,
	jcm@...hat.com, andrea.gallo@...aro.org, dhdang@....com,
	jeremy.linton@....com, liudongdong3@...wei.com, cov@...eaurora.org,
	Tomasz Nowicki <tn@...ihalf.com>
Subject: [PATCH V7 10/11] arm64, pci, acpi: Provide ACPI-specific prerequisites for PCI bus enumeration.

ACPI requires to run acpi_pci_{add|remove}_bus while new PCI bus is created.
This allows to do some ACPI-specific additional configuration, like
PCI hotplug slot enumeration. In order to fulfill these requirements,
we implement arch-specific pcibios_{add|remove}_bus calls
and call acpi_pci_{add|remove}_bus from there.

Signed-off-by: Tomasz Nowicki <tn@...ihalf.com>
To: Catalin Marinas <catalin.marinas@....com>
To: Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>
To: Will Deacon <will.deacon@....com>
To: Arnd Bergmann <arnd@...db.de>
---
 arch/arm64/kernel/pci.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
index 15109c11..eeec5f6 100644
--- a/arch/arm64/kernel/pci.c
+++ b/arch/arm64/kernel/pci.c
@@ -17,6 +17,7 @@
 #include <linux/mm.h>
 #include <linux/of_pci.h>
 #include <linux/of_platform.h>
+#include <linux/pci-acpi.h>
 #include <linux/slab.h>
 
 /*
@@ -64,6 +65,16 @@ int pcibios_alloc_irq(struct pci_dev *dev)
 	return 0;
 }
 
+void pcibios_add_bus(struct pci_bus *bus)
+{
+	acpi_pci_add_bus(bus);
+}
+
+void pcibios_remove_bus(struct pci_bus *bus)
+{
+	acpi_pci_remove_bus(bus);
+}
+
 /*
  * raw_pci_read/write - Platform-specific PCI config space access.
  */
-- 
1.9.1