Re: [PATCH v4] schemas: pci: Document PCIe T_POWER_ON

Rob Herring <[email protected]> Thu, 19 Feb 2026 07:45:27 -0600
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
Message-ID <[email protected]>
On Thu, Feb 05, 2026 at 03:03:46PM +0530, Krishna Chaitanya Chundru wrote:
> >From PCIe r7, sec 5.5.4 & Table 5-11 in sec 5.5.5 T_POWER_ON is the
> minimum amount 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.
> 
> This property should be used to indicate the T_POWER_ON and drivers using
> this property are responsible for programming both the scale and the value
> of T_POWER_ON to comply with the PCIe specification.
> 
> Signed-off-by: Krishna Chaitanya Chundru <[email protected]>
> Acked-by: Manivannan Sadhasivam <[email protected]>

Applied, thanks.