PCI: j721e: Validate max-link-speed from DT

Use the new pcie_get_link_speed() helper to validate the value read from
the "max-link-speed" DT property.  If the value is missing or invalid,
fall back to Gen2 (speed = 2).  This prepares for the removal of the
range check in of_pci_get_max_link_speed().

Signed-off-by: Hans Zhang <18255117159@163.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20260313165522.123518-4-18255117159@163.com

diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c
index 6f2501479c70196fc8ca848e3d61cccc55d42607..bfdfe98d5aba73d417a32be5541666a10e4b80aa 100644 (file)
--- a/drivers/pci/controller/cadence/pci-j721e.c
+++ b/drivers/pci/controller/cadence/pci-j721e.c
@@ -202,7 +202,8 @@ static int j721e_pcie_set_link_speed(struct j721e_pcie *pcie,
        int ret;
 
        link_speed = of_pci_get_max_link_speed(np);
-       if (link_speed < 2)
+       if ((link_speed < 2) ||
+           (pcie_get_link_speed(link_speed) == PCI_SPEED_UNKNOWN))
                link_speed = 2;
 
        val = link_speed - 1;