From: Hou Zhiqiang Date: Thu, 13 Feb 2020 04:06:37 +0000 (+0800) Subject: PCI: mobiveil: Add callback function for link up check X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=fc99b3311af7125c46b56e753dc1a65c27b0d7e2;p=linux.git PCI: mobiveil: Add callback function for link up check Platforms integrating the Mobiveil GPEX can implement a specific mechanism to check the link status. Add a callback to enable platform specific link status functions. Signed-off-by: Hou Zhiqiang [lorenzo.pieralisi@arm.com: updated log] Signed-off-by: Lorenzo Pieralisi Reviewed-by: Andrew Murray --- diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.c b/drivers/pci/controller/mobiveil/pcie-mobiveil.c index 8215d7eeff4ef..23ab904989ea0 100644 --- a/drivers/pci/controller/mobiveil/pcie-mobiveil.c +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.c @@ -125,6 +125,9 @@ void mobiveil_csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie) { + if (pcie->ops->link_up) + return pcie->ops->link_up(pcie); + return (mobiveil_csr_readl(pcie, LTSSM_STATUS) & LTSSM_STATUS_L0_MASK) == LTSSM_STATUS_L0; } diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h b/drivers/pci/controller/mobiveil/pcie-mobiveil.h index 1f7d9da765424..63eec5618af2b 100644 --- a/drivers/pci/controller/mobiveil/pcie-mobiveil.h +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h @@ -148,6 +148,10 @@ struct mobiveil_root_port { struct pci_host_bridge *bridge; }; +struct mobiveil_pab_ops { + int (*link_up)(struct mobiveil_pcie *pcie); +}; + struct mobiveil_pcie { struct platform_device *pdev; void __iomem *csr_axi_slave_base; /* root port config base */ @@ -157,6 +161,7 @@ struct mobiveil_pcie { int ppio_wins; int ob_wins_configured; /* configured outbound windows */ int ib_wins_configured; /* configured inbound windows */ + const struct mobiveil_pab_ops *ops; struct mobiveil_root_port rp; };