Messages in this thread | | | Date | Fri, 25 Jun 2021 13:29:17 +0100 | From | "Russell King (Oracle)" <> | Subject | Re: [PATCH v2] ARM: dts: imx6qdl-sr-som: Increase the PHY reset duration to 10ms |
| |
On Fri, Jun 25, 2021 at 02:13:53PM +0200, Maxime Chevallier wrote: > The AR803x PHY used on this modules seems to require the reset line to > be asserted for around 10ms in order to avoid rare cases where the PHY > gets stuck in an incoherent state that prevents it to function > correctly. > > The previous value of 2ms was found to be problematic on some setups, > causing intermittent issues where the PHY would be unresponsive > every once in a while on some sytems, with a low occurrence (it typically > took around 30 consecutive reboots to encounter the issue). > > Bumping the delay to the 10ms makes the issue dissapear, with more than > 2500 consecutive reboots performed without the issue showing-up. > > Fixes: 208d7baf8085 ("ARM: imx: initial SolidRun HummingBoard support") > Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com> > Tested-by: Hervé Codina <herve.codina@bootlin.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Thanks!
-- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
| |