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Commit 0d20d621 authored by Thierry Reding's avatar Thierry Reding Committed by Bjorn Helgaas
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PCI: tegra: Clear CLKREQ# enable on port disable 



When a root port is disabled, disable the CLKREQ# signal if available.

Tested-by: default avatarStephen Warren <swarren@nvidia.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent 41534e53

drivers/pci/host/pci-tegra.c

+5 −0
Original line number Diff line number Diff line
@@ -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);

}