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| author | Richard Zhu <hongxing.zhu@nxp.com> | 2025-10-15 06:04:21 +0300 |
|---|---|---|
| committer | Shawn Guo <shawnguo@kernel.org> | 2025-11-12 04:51:28 +0300 |
| commit | 45b68efd9bb52d18075f9440dddb3705b72d5810 (patch) | |
| tree | 773f4f9295da6bb58ae3a5cc983f402437840dc3 /include | |
| parent | 798825c11e12a63b43a92b794dc157d966475b2b (diff) | |
| download | linux-45b68efd9bb52d18075f9440dddb3705b72d5810.tar.xz | |
arm64: dts: imx8mp-evk: Add supports-clkreq property to PCIe M.2 port
According to PCIe r6.1, sec 5.5.1.
The following rules define how the L1.1 and L1.2 substates are entered:
Both the Upstream and Downstream Ports must monitor the logical state of
the CLKREQ# signal.
Typical implement is using open drain, which connect RC's clkreq# to
EP's clkreq# together and pull up clkreq#.
imx8mp-evk matches this requirement, so add supports-clkreq to allow
PCIe device enter ASPM L1 Sub-State.
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions