[PATCH v2 6/8] PCI: aardvark: Add 100 ms delay after link training

[Hans Zhang <18255117159@163.com>]

The Aardvark PCIe controller driver waits for the link to come up but
does not implement the mandatory 100 ms delay after link training
completes for speeds greater than 5.0 GT/s (PCIe r6.0 sec 6.6.1).

The driver already maintains a 'link_gen' field that holds the negotiated
link speed. Use it together with pcie_wait_after_link_train() to insert
the required delay immediately after confirming that the link is up.

Signed-off-by: Hans Zhang <18255117159@163.com>
---
 drivers/pci/controller/pci-aardvark.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c
index e34bea1ff0ac..526351c21c49 100644
--- a/drivers/pci/controller/pci-aardvark.c
+++ b/drivers/pci/controller/pci-aardvark.c
@@ -350,8 +350,10 @@ static int advk_pcie_wait_for_link(struct advk_pcie *pcie)
 
 	/* check if the link is up or not */
 	for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) {
-		if (advk_pcie_link_up(pcie))
+		if (advk_pcie_link_up(pcie)) {
+			pcie_wait_after_link_train(pcie->link_gen);
 			return 0;
+		}
 
 		usleep_range(LINK_WAIT_USLEEP_MIN, LINK_WAIT_USLEEP_MAX);
 	}
-- 
2.34.1