Re: [PATCH] schemas: pci: Document PCIe T_POWER_ON
Manivannan Sadhasivam <[email protected]> Thu, 6 Nov 2025 18:08:21 +0530
| Newsgroups | org.kernel.vger.devicetree-spec,org.kernel.vger.linux-arm-msm,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-kernel,org.kernel.vger.linux-pci |
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| Message-ID | <7v5bmbke37qy7e5qns7j7sjlcutdu53nbutgfo6tn47qkojxjy@phwcchh5gs5q> |
On Thu, Nov 06, 2025 at 05:09:51PM +0530, Krishna Chaitanya Chundru wrote: > From PCIe r6, sec 5.5.4 & sec 5.5.5 T POWER_ON is the minimum amount T_POWER_ON You should provide reference to the Table 5-11, where T_POWER_ON is described. > of time "(in us)" > that each component must wait in L1.2.Exit after sampling CLKREQ# > asserted before actively driving the interface to ensure no device is ever > actively driving into an unpowered component and these values are based on > the components and AC coupling capacitors used in the connection linking > the two components. > > Certain controllers may need to program this before enumeration, such > controllers can use this property to program it. > I'd remove this statement and just mention that this property should be used to indicate the T_POWER_ON for each Root Port. - Mani -- மணிவண்ணன் சதாசிவம்