[PATCH v6 2/9] PCI: tegra194: Calibrate P2U for endpoint mode

[Manikanta Maddireddy]

From: Vidya Sagar <vidyas@xxxxxxxxxx>

Calibrate P2U for endpoint controller to request UPHY PLL rate change to
Gen1 during initialization. This helps to reset stale PLL state from the
previous bad link state.

Signed-off-by: Vidya Sagar <vidyas@xxxxxxxxxx>
Signed-off-by: Manikanta Maddireddy <mmaddireddy@xxxxxxxxxx>
---
Changes V1 -> V6: None

 drivers/pci/controller/dwc/pcie-tegra194.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index f026af7c2ce0..51bad99cec31 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -1058,6 +1058,9 @@ static int tegra_pcie_enable_phy(struct tegra_pcie_dw *pcie)
 		ret = phy_power_on(pcie->phys[i]);
 		if (ret < 0)
 			goto phy_exit;
+
+		if (pcie->of_data->mode == DW_PCIE_EP_TYPE)
+			phy_calibrate(pcie->phys[i]);
 	}
 
 	return 0;
-- 
2.34.1