> -----Original Message----- > From: linux-arm-kernel <linux-arm-kernel-bounces@xxxxxxxxxxxxxxxxxxx> On > Behalf Of Kostya Porotchkin > Sent: Wednesday, February 3, 2021 16:51 > To: Russell King - ARM Linux admin <linux@xxxxxxxxxxxxxxx> > Cc: devicetree@xxxxxxxxxxxxxxx; Baruch Siach <baruch@xxxxxxxxxx>; > andrew@xxxxxxx; jaz@xxxxxxxxxxxx; gregory.clement@xxxxxxxxxxx; linux- > kernel@xxxxxxxxxxxxxxx; Nadav Haklai <nadavh@xxxxxxxxxxx>; > robh+dt@xxxxxxxxxx; Stefan Chulski <stefanc@xxxxxxxxxxx>; > mw@xxxxxxxxxxxx; Ben Peled <bpeled@xxxxxxxxxxx>; linux-arm- > kernel@xxxxxxxxxxxxxxxxxxx; sebastian.hesselbarth@xxxxxxxxx > Subject: RE: [EXT] Re: [PATCH 02/11] dts: mvebu: Update A8K AP806 SDHCI > settings [KP] > > > > Hi Konstantin, > > > > > > > > On Wed, Feb 03 2021, kostap@xxxxxxxxxxx wrote: > > > > > From: Konstantin Porotchkin <kostap@xxxxxxxxxxx> > > > > > > > > > > Update the settings for AP806 SDHCI interface according to > > > > > latest Xenon drivers changes. > > > > > - no need to select the PHY slow mode anymore > > > > > > > > Why? Has anything changed since the introduction of > > > > marvell,xenon-phy-slow- mode? > > > [KP] AP806 B0, AP807 and later do not need the "slow mode" set by > > > the > > default. > > > The HWE-7296210 errata is not applicable to these components and > > > they are able to run AP SDHCI in HS400 8-bit mode. > > > > So what about all those people, such as me, who have A0 silicon on > > their Macchiatobin boards? > > > > You can't just go around removing DT properties like this. > > > [KP] So for older systems this "slow mode" parameter could be set on the > board level. > When it is set in ap80x,dtsi file it downgrades all systems to HS-SDR52, even if > they support HS400 on AP side. > MacchiatoBIN AP eMMC is connected to 3.3v regulator and has "no-1-8-v" flag > set, so it should remain in low speed anyway. [KP] I also forgot to mention this code piece in Xenon driver: /* Disable HS200 on Armada AP806 */ if (priv->hw_version == XENON_AP806) host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200; > > > -- > > RMK's Patch system: https://urldefense.proofpoint.com/v2/url?u=https- > > > 3A__www.armlinux.org.uk_developer_patches_&d=DwIBAg&c=nKjWec2b6R0 > > mOyPaz7xtfQ&r=- > > > N9sN4p5NSr0JGQoQ_2UCOgAqajG99W1EbSOww0WU8o&m=yMC9YPQXZUm > > > QPwlD7KCTVoVTPXCTQwTXD2yVsAo6sxA&s=OuBO2QArzHvV4k_vsNZdmSoDX > > rL4Q_voTqxrlYU6KKE&e= > > FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last! > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > https://urldefense.proofpoint.com/v2/url?u=http- > 3A__lists.infradead.org_mailman_listinfo_linux-2Darm- > 2Dkernel&d=DwICAg&c=nKjWec2b6R0mOyPaz7xtfQ&r=- > N9sN4p5NSr0JGQoQ_2UCOgAqajG99W1EbSOww0WU8o&m=8f- > 1fnISJVHCS4gZTeFgRPXGPiwBevUsFbmYDBmkRWM&s=RBlEEUXG0sOmZHsQ > Omurf018V8kSE_IMZR7bDLVJ0FA&e=
