author: Andy Hu <andy.hu@starfivetech.com> 2023-09-14 19:16:32 +0800
committer: Andy Hu <andy.hu@starfivetech.com> 2023-09-14 19:16:32 +0800
commit: 53d88a219a29f4a30f94f619985d15bbe03ac67a
parent: d1ff698066686acd73d236b74976972837f2d883
Commit Summary:
Diffstat:
1 file changed, 8 insertions, 4 deletions
diff --git a/drivers/pci/controller/pcie-plda.c b/drivers/pci/controller/pcie-plda.c
index 196cf6cef90f..053e4ee9c43d 100644
--- a/drivers/pci/controller/pcie-plda.c
+++ b/drivers/pci/controller/pcie-plda.c
@@ -843,10 +843,9 @@ static void plda_pcie_hw_init(struct plda_pcie *pcie)
plda_pcie_setup_windows(pcie);
/* Ensure that PERST has been asserted for at least 100 ms */
- msleep(300);
+ msleep(100);
if (pcie->reset_gpio)
gpiod_set_value_cansleep(pcie->reset_gpio, 0);
-
}
static int plda_pcie_is_link_up(struct plda_pcie *pcie)
@@ -947,8 +946,13 @@ static int plda_pcie_probe(struct platform_device *pdev)
plda_pcie_hw_init(pcie);
- if (plda_pcie_is_link_up(pcie) == PLDA_LINK_DOWN)
- goto release;
+ if (plda_pcie_is_link_up(pcie) == PLDA_LINK_UP) {
+ /* As the requirement in PCIe base spec r6.0, system (<=5GT/s) must
+ * wait a minimum of 100 ms following exit from a conventional reset
+ * before sending a configuration request to the device.
+ */
+ msleep(100);
+ }
if (IS_ENABLED(CONFIG_PCI_MSI)) {
ret = plda_pcie_enable_msi(pcie, bus);