PCI: Add T_PERST_CLK_US macro
The "Power Sequencing and Reset Signal Timings" table of the PCI Express Card Electromechanical Specification, Revision 5.1, Section 2.9.2, indicates PERST# should be deasserted after minimum of 100us once REFCLK is stable (symbol T_PERST-CLK). Add a macro so that PCIe controller drivers can use it. Link: https://lore.kernel.org/linux-pci/20240102-j7200-pcie-s2r-v7-5-a2f9156da6c3@bootlin.comSigned-off-by:Thomas Richard <thomas.richard@bootlin.com> [kwilczynski: commit log, update sleep interval macros code comments] Signed-off-by:
Krzysztof Wilczyński <kwilczynski@kernel.org>
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