Commit ff5c2bb9 authored by Vidya Sagar's avatar Vidya Sagar Committed by Lorenzo Pieralisi
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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: default avatarVidya Sagar <vidyas@nvidia.com>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: default avatarThierry Reding <treding@nvidia.com>
parent 54ecb8f7

drivers/pci/controller/dwc/pcie-tegra194.c

+2 −4
Original line number Diff line number Diff line
@@ -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);

	}