diff options
| author | Richard Zhu <hongxing.zhu@nxp.com> | 2025-10-15 06:04:23 +0300 |
|---|---|---|
| committer | Shawn Guo <shawnguo@kernel.org> | 2025-11-12 04:51:29 +0300 |
| commit | 44f9bcc943f53e25f63becbb471f0909fe77b603 (patch) | |
| tree | 54e47787b5a7d1d1feb16f18e902a93d44fe8ee9 /include | |
| parent | 053ee55576cec9a94a16680a266f242df1872eb9 (diff) | |
| download | linux-44f9bcc943f53e25f63becbb471f0909fe77b603.tar.xz | |
arm64: dts: imx8qm-mek: 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#.
imx8qm-mek 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