diff options
| author | Thierry Reding <treding@nvidia.com> | 2014-08-26 17:11:35 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2014-09-16 16:54:05 -0600 |
| commit | 0d20d6219216c5b37be8c82ee4a58d7f642e7cb0 (patch) | |
| tree | bdc79cb85ba340575a94a8657a52f52b264f2c61 | |
| parent | 41534e53786df49b708c1e06f5d6ef9b53fbb689 (diff) | |
| download | linux-0d20d6219216c5b37be8c82ee4a58d7f642e7cb0.tar.gz | |
PCI: tegra: Clear CLKREQ# enable on port disable
When a root port is disabled, disable the CLKREQ# signal if available.
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| -rw-r--r-- | drivers/pci/host/pci-tegra.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c index 7be31f58a4e6..42241b5bdf02 100644 --- a/drivers/pci/host/pci-tegra.c +++ b/drivers/pci/host/pci-tegra.c @@ -569,6 +569,7 @@ static void tegra_pcie_port_enable(struct tegra_pcie_port *port) static void tegra_pcie_port_disable(struct tegra_pcie_port *port) { + const struct tegra_pcie_soc_data *soc = port->pcie->soc_data; unsigned long ctrl = tegra_pcie_port_get_pex_ctrl(port); unsigned long value; @@ -579,6 +580,10 @@ static void tegra_pcie_port_disable(struct tegra_pcie_port *port) /* disable reference clock */ value = afi_readl(port->pcie, ctrl); + + if (soc->has_pex_clkreq_en) + value &= ~AFI_PEX_CTRL_CLKREQ_EN; + value &= ~AFI_PEX_CTRL_REFCLK_EN; afi_writel(port->pcie, value, ctrl); } |