diff options
| author | Hou Zhiqiang <Zhiqiang.Hou@nxp.com> | 2020-02-13 12:06:37 +0800 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2020-02-21 11:53:22 +0000 |
| commit | fc99b3311af7125c46b56e753dc1a65c27b0d7e2 (patch) | |
| tree | 8c55012802cf2abfb54de3734d1697654ce20021 /drivers/pci | |
| parent | ed620e96541f3248ad7cfe069f98d43177ae0435 (diff) | |
| download | linux-fc99b3311af7125c46b56e753dc1a65c27b0d7e2.tar.gz | |
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 <Zhiqiang.Hou@nxp.com>
[lorenzo.pieralisi@arm.com: updated log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/controller/mobiveil/pcie-mobiveil.c | 3 | ||||
| -rw-r--r-- | drivers/pci/controller/mobiveil/pcie-mobiveil.h | 5 |
2 files changed, 8 insertions, 0 deletions
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.c b/drivers/pci/controller/mobiveil/pcie-mobiveil.c index 8215d7eeff4e..23ab904989ea 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 1f7d9da76542..63eec5618af2 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; }; |