[PATCH 3/4] powerpc/powernv: Detect PHB chip revision

[Gavin Shan <shangw@linux.vnet.ibm.com>]

The patch intends to detect the PHB3 chip revision that was exported
by the underly firmware. In turn, we can have different AER configuration
for switch ports and endpoints accordingly.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
---
 arch/powerpc/platforms/powernv/pci-ioda.c |    5 +++++
 arch/powerpc/platforms/powernv/pci.h      |    1 +
 2 files changed, 6 insertions(+)

diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 2c6d173..aea45fa 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1201,6 +1201,11 @@ void __init pnv_pci_init_ioda_phb(struct device_node *np,
 	else
 		phb->model = PNV_PHB_MODEL_UNKNOWN;
 
+	/* Detect chip revision */
+	prop32 = of_get_property(np, "ibm,revision", NULL);
+	if (prop32)
+		phb->rev = be32_to_cpup(prop32);
+
 	/* Parse 32-bit and IO ranges (if any) */
 	pci_process_bridge_OF_ranges(hose, np, !hose->global_number);
 
diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h
index 911c24e..c5a0810 100644
--- a/arch/powerpc/platforms/powernv/pci.h
+++ b/arch/powerpc/platforms/powernv/pci.h
@@ -89,6 +89,7 @@ struct pnv_phb {
 	struct pci_controller	*hose;
 	enum pnv_phb_type	type;
 	enum pnv_phb_model	model;
+	u32			rev;
 	u64			hub_id;
 	u64			opal_id;
 	void __iomem		*regs;
-- 
1.7.10.4