Re: [PATCH] PCI: apple: Reset the port for 100ms on probe
From: Marc Zyngier <maz@kernel.org>
Date: 2021-11-18 10:45:24
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linux-pci, lkml
On Thu, 18 Nov 2021 10:01:58 +0000, Marc Zyngier [off-list ref] wrote:
There is also a third delay (Tperst-clk) which represents the time required for the clock to ramp up before releasing #PERST. No, there is no value associated with this.
Actually, there is. At least the PCIe CMS r2.0 (2.6.2. AC Specifications) does provide a table of the timings. Tperst-clk has a minimum value of 100us. Which means I can tighten things further. M. -- Without deviation from the norm, progress is not possible. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel