diff options
Diffstat (limited to 'drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c')
| -rw-r--r-- | drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c b/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c index d7b7350f02dd..1b32c37c06e3 100644 --- a/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c +++ b/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c @@ -53,6 +53,17 @@ static inline void ls_g4_pcie_pf_writel(struct ls_g4_pcie *pcie, iowrite32(val, pcie->pci.csr_axi_slave_base + PCIE_PF_OFF + off); } +static bool ls_g4_pcie_is_bridge(struct ls_g4_pcie *pcie) +{ + struct mobiveil_pcie *mv_pci = &pcie->pci; + u32 header_type; + + header_type = mobiveil_csr_readb(mv_pci, PCI_HEADER_TYPE); + header_type &= 0x7f; + + return header_type == PCI_HEADER_TYPE_BRIDGE; +} + static int ls_g4_pcie_link_up(struct mobiveil_pcie *pci) { struct ls_g4_pcie *pcie = to_ls_g4_pcie(pci); @@ -184,7 +195,7 @@ static void ls_g4_pcie_reset(struct work_struct *work) ctrl &= ~PCI_BRIDGE_CTL_BUS_RESET; mobiveil_csr_writew(mv_pci, ctrl, PCI_BRIDGE_CONTROL); - if (!ls_g4_pcie_reinit_hw(pcie)) + if (ls_g4_pcie_reinit_hw(pcie)) return; ls_g4_pcie_enable_interrupt(pcie); @@ -234,6 +245,9 @@ static int __init ls_g4_pcie_probe(struct platform_device *pdev) return ret; } + if (!ls_g4_pcie_is_bridge(pcie)) + return -ENODEV; + ls_g4_pcie_enable_interrupt(pcie); return 0; |