diff options
| author | Shawn Lin <shawn.lin@rock-chips.com> | 2017-04-11 16:27:02 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-04-11 16:27:02 -0500 |
| commit | 64d6ea602ce619633a6e0af979e2c73738f6aeba (patch) | |
| tree | 9d900b17bdafaebda3792f4a57e9a7ecb7836ee6 /drivers/pci/host | |
| parent | 55021718b9e9d21efd47117dd0e6c1cfebd654f8 (diff) | |
PCI: rockchip: Set PCI_EXP_LNKSTA_SLC in the Root Port
All platforms using Rockchip use a common clock for the Root Port and the
slot connected to it. Indicate this by setting the Slot Clock Configuration
(PCI_EXP_LNKSTA_SLC) bit in the Root Port's Link Status.
Per the Implementation Note in the spec (PCIe r3.1, sec 7.8.7), if the
downstream component also sets PCI_EXP_LNKSTA_SLC, software may set the
Common Clock Configuration (PCI_EXP_LNKCTL_CCC) bits on both ends of the
Link. This is done by pcie_aspm_configure_common_clock().
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Cc: Brian Norris <briannorris@chromium.org>
Cc: jeffy.chen <jeffy.chen@rock-chips.com>
Diffstat (limited to 'drivers/pci/host')
| -rw-r--r-- | drivers/pci/host/pcie-rockchip.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c index a7467212ea18..94feb7dfd8f4 100644 --- a/drivers/pci/host/pcie-rockchip.c +++ b/drivers/pci/host/pcie-rockchip.c @@ -598,7 +598,7 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) /* Set RC's clock architecture as common clock */ status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS); - status |= PCI_EXP_LNKCTL_CCC; + status |= PCI_EXP_LNKSTA_SLC << 16; rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS); /* Set RC's RCB to 128 */ |