[PATCH 01/12] PCI: tegra: Start LTSSM after programming root port

Manikanta Maddireddy
2017-10-27T19:29:18Z

This patch ensures that LTSSM is started (by deasserting pcie_xrst) only
after all the required root port register programming is completed.

Signed-off-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
---
drivers/pci/host/pci-tegra.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index 96e8038c3019..b41c60c7414c 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -1024,9 +1024,6 @@ static int tegra_pcie_enable_controller(struct tegra_pcie *pcie)
}
}

- /* take the PCIe interface module out of reset */
- reset_control_deassert(pcie->pcie_xrst);
-
/* finally enable PCIe */
value = afi_readl(pcie, AFI_CONFIGURATION);
value |= AFI_CONFIGURATION_EN_FPCI;
@@ -1065,7 +1062,6 @@ static void tegra_pcie_power_off(struct tegra_pcie *pcie)
dev_err(dev, "failed to power off PHY(s): %d\n", err);
}

- reset_control_assert(pcie->pcie_xrst);
reset_control_assert(pcie->afi_rst);
reset_control_assert(pcie->pex_rst);

@@ -2116,7 +2112,12 @@ static void tegra_pcie_enable_ports(struct tegra_pcie *pcie)
port->index, port->lanes);

tegra_pcie_port_enable(port);
+ }

+ /* take the PCIe interface module out of reset */
+ reset_control_deassert(pcie->pcie_xrst);
+
+ list_for_each_entry_safe(port, tmp, &pcie->ports, list) {
if (tegra_pcie_port_check_link(port))
continue;

--
2.1.4