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PCI: tegra: Fix CLKREQ dependency programming 

Corrects the programming to provide REFCLK to the downstream device
when there is no CLKREQ sideband signal routing present from root port
to the endpont.

Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Vidya Sagar 2019-10-05 22:12:11 +05:30 committed by Lorenzo Pieralisi
parent 54ecb8f702
commit ff5c2bb9c6
1 changed files with 2 additions and 4 deletions
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6
drivers/pci/controller/dwc/pcie-tegra194.c
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@ -40,8 +40,6 @@
#define APPL_PINMUX_CLKREQ_OVERRIDE BIT(3)
#define APPL_PINMUX_CLK_OUTPUT_IN_OVERRIDE_EN BIT(4)
#define APPL_PINMUX_CLK_OUTPUT_IN_OVERRIDE BIT(5)
#define APPL_PINMUX_CLKREQ_OUT_OVRD_EN BIT(9)
#define APPL_PINMUX_CLKREQ_OUT_OVRD BIT(10)
#define APPL_CTRL 0x4
#define APPL_CTRL_SYS_PRE_DET_STATE BIT(6)
@ -1193,8 +1191,8 @@ static int tegra_pcie_config_controller(struct tegra_pcie_dw *pcie,
if (!pcie->supports_clkreq) {
val = appl_readl(pcie, APPL_PINMUX);
val |= APPL_PINMUX_CLKREQ_OUT_OVRD_EN;
val |= APPL_PINMUX_CLKREQ_OUT_OVRD;
val |= APPL_PINMUX_CLKREQ_OVERRIDE_EN;
val &= ~APPL_PINMUX_CLKREQ_OVERRIDE;
appl_writel(pcie, val, APPL_PINMUX);
}