The reset value of Primary, Secondary and Subordinate bus numbers is zero which is a broken setup. Program a sensible default value for Primary/Secondary/Subordinate bus numbers. Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> Reviewed-by: Minghuan Lian <Minghuan.Lian@xxxxxxx> Reviewed-by: Subrahmanya Lingappa <l.subrahmanya@xxxxxxxxxxxxxx> --- V6: - Rebased the patch, no functional change. drivers/pci/controller/pcie-mobiveil.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c index cdf15cc..8f56130 100644 --- a/drivers/pci/controller/pcie-mobiveil.c +++ b/drivers/pci/controller/pcie-mobiveil.c @@ -561,6 +561,12 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie) u32 value, pab_ctrl, type = 0; struct resource_entry *win; + /* setup bus numbers */ + value = csr_readl(pcie, PCI_PRIMARY_BUS); + value &= 0xff000000; + value |= 0x00ff0100; + csr_writel(pcie, value, PCI_PRIMARY_BUS); + /* * program Bus Master Enable Bit in Command Register in PAB Config * Space -- 1.7.1
