[PATCH v8 3/5] PCI: j721e: Validate max-link-speed from DT

Hans Zhang
2026-03-12T16:38:22Z

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>
---
drivers/pci/controller/cadence/pci-j721e.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c
index 6f2501479c70..bfdfe98d5aba 100644
--- 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;
--
2.34.1