summaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'drivers')
-rw-r--r--drivers/pci/pci_mvebu.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/pci/pci_mvebu.c b/drivers/pci/pci_mvebu.c
index fd2744d..4eedfe1 100644
--- a/drivers/pci/pci_mvebu.c
+++ b/drivers/pci/pci_mvebu.c
@@ -155,6 +155,14 @@ static void mvebu_get_port_lane(struct mvebu_pcie *pcie, int pex_idx,
}
#endif
+static int mvebu_pex_unit_is_x4(int pex_idx)
+{
+ int pex_unit = pex_idx < 9 ? pex_idx >> 2 : 3;
+ u32 mask = (0x0f << (pex_unit * 8));
+
+ return (readl(COMPHY_REFCLK_ALIGNMENT) & mask) == mask;
+}
+
static inline bool mvebu_pcie_link_up(struct mvebu_pcie *pcie)
{
u32 val;
@@ -419,5 +427,11 @@ void pci_init_board(void)
writel(0, pcie->base + PCIE_BAR_HI_OFF(0));
bus = hose->last_busno + 1;
+
+ /* need to skip more for X4 links, otherwise scan will hang */
+ if (mvebu_soc_family() == MVEBU_SOC_AXP) {
+ if (mvebu_pex_unit_is_x4(i))
+ i += 3;
+ }
}
}