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PCI: mobiveil: Add callback function for link up check

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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>
This commit is contained in:
Hou Zhiqiang
2020-02-13 12:06:37 +08:00
committed by Lorenzo Pieralisi
parent ed620e9654
commit fc99b3311a
2 changed files with 8 additions and 0 deletions
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3
drivers/pci/controller/mobiveil/pcie-mobiveil.c
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@@ -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;
}