[PATCH 3/3] PCI: iproc: Display PCIe Link information

[Srinath Mannam]

Add more comprehensive information to show PCIe link speed and link
width to the console.

Signed-off-by: Srinath Mannam <srinath.mannam@xxxxxxxxxxxx>
---
 drivers/pci/controller/pcie-iproc.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pcie-iproc.c b/drivers/pci/controller/pcie-iproc.c
index e7f0d58..ed41357 100644
--- a/drivers/pci/controller/pcie-iproc.c
+++ b/drivers/pci/controller/pcie-iproc.c
@@ -823,6 +823,8 @@ static int iproc_pcie_check_link(struct iproc_pcie *pcie)
 #define PCI_TARGET_LINK_SPEED_MASK	0xf
 #define PCI_TARGET_LINK_SPEED_GEN2	0x2
 #define PCI_TARGET_LINK_SPEED_GEN1	0x1
+#define PCI_TARGET_LINK_WIDTH_MASK	0x3f
+#define PCI_TARGET_LINK_WIDTH_OFFSET	0x4
 		iproc_pci_raw_config_read32(pcie, 0,
 					    IPROC_PCI_EXP_CAP + PCI_EXP_LNKCTL2,
 					    4, &link_ctrl);
@@ -843,7 +845,14 @@ static int iproc_pcie_check_link(struct iproc_pcie *pcie)
 		}
 	}
 
-	dev_info(dev, "link: %s\n", link_is_active ? "UP" : "DOWN");
+	if (link_is_active) {
+		dev_info(dev, "link UP @ Speed Gen-%d and width-x%d\n",
+			 link_status & PCI_TARGET_LINK_SPEED_MASK,
+			 (link_status >> PCI_TARGET_LINK_WIDTH_OFFSET) &
+			 PCI_TARGET_LINK_WIDTH_MASK);
+	} else {
+		dev_info(dev, "link DOWN\n");
+	}
 
 	return link_is_active ? 0 : -ENODEV;
 }
-- 
2.7.4