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| author |   Kishon Vijay Abraham I <kishon@ti.com> | 2019-03-25 15:09:36 +0530 |
|---|---|---|
| committer |   Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2019-04-15 13:24:02 +0100 |
| commit | b22af42b3e57c3a49a4c4a54c7d8a1363af75e90 (patch) | |
| tree | fa33489b072f77afa6fce771cc7e59a960d294eb /drivers/pci/controller/dwc/pci-keystone.c | |
| parent | PCI: keystone: Add support for PCIe RC in AM654x Platforms (diff) | |
| download | linux-dev-b22af42b3e57c3a49a4c4a54c7d8a1363af75e90.tar.xz linux-dev-b22af42b3e57c3a49a4c4a54c7d8a1363af75e90.zip | |
PCI: keystone: Invoke phy_reset() API before enabling PHY
SERDES connected to the PCIe controller in AM654 requires
power on reset enable (POR_EN) to be set in the SERDES. The
SERDES driver sets POR_EN in the reset ops and it has to be
invoked before init or enable ops. In order for SERDES driver
to set POR_EN, invoke the phy_reset() API in pci-keystone driver.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Diffstat (limited to 'drivers/pci/controller/dwc/pci-keystone.c')
| -rw-r--r-- | drivers/pci/controller/dwc/pci-keystone.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c index a6a482bd648f..e4a816f53b8e 100644 --- a/drivers/pci/controller/dwc/pci-keystone.c +++ b/drivers/pci/controller/dwc/pci-keystone.c @@ -897,6 +897,10 @@ static int ks_pcie_enable_phy(struct keystone_pcie *ks_pcie) int num_lanes = ks_pcie->num_lanes; for (i = 0; i < num_lanes; i++) { + ret = phy_reset(ks_pcie->phy[i]); + if (ret < 0) + goto err_phy; + ret = phy_init(ks_pcie->phy[i]); if (ret < 0) goto err_phy; |