Re: [PATCH] schemas: pci: Document PCIe T_POWER_ON
Krishna Chaitanya Chundru <[email protected]> Thu, 6 Nov 2025 19:37:32 +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 | <[email protected]> |
On 11/6/2025 6:08 PM, Manivannan Sadhasivam wrote: > 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 Actually 5.5.5 section has only table 5-11 which describes this, I will add the Table 5-11 reference also in next patch. >> 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. ack. - Krishna Chaitanya. > - Mani >