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ARM: dts: imx6qp-sabresd: Enable PCIe support 

In the i.MX6QP sabresd board(sch-28857) design, one external oscillator
is powered up by vgen3 and used as the PCIe reference clock source by
the endpoint device.

If RC uses this oscillator as reference clock too, PLL6(ENET PLL) would
has to be in bypass mode, and ENET clocks would be messed up.

To keep things simple, let RC use the internal PLL as reference clock
and set vgen3 always on to enable the external oscillator for endpoint
device on i.MX6QP sabresd board.

NOTE: This reference clock setup is used to pass the GEN2 TX compliance
tests, and isn't recommended as a setup in the end-user design.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Richard Zhu 2022-02-21 14:33:56 +08:00 committed by Shawn Guo
parent 7b3c8ad088
commit 9baabac707
1 changed files with 5 additions and 1 deletions
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6
arch/arm/boot/dts/imx6qp-sabresd.dts
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@ -50,8 +50,12 @@
}; };
}; };
&vgen3_reg {
regulator-always-on;
};
&pcie { &pcie {
status = "disabled"; status = "okay";
}; };
&sata { &sata {