From: Joakim Tjernlund <joakim.tjernlund@transmode.se>
To: "arnd@arndb.de" <arnd@arndb.de>
Cc: "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH 1/2] sdhci-of-esdhc: Support 8BIT bus width.
Date: Mon, 4 May 2015 21:17:27 +0000 [thread overview]
Message-ID: <1430774247.27859.62.camel@transmode.se> (raw)
In-Reply-To: <2384804.XbcbTBBFP9@wuerfel>
On Mon, 2015-05-04 at 19:31 +0200, Arnd Bergmann wrote:
> On Monday 04 May 2015 18:31:31 Joakim Tjernlund wrote:
> > @@ -252,6 +260,8 @@ static void esdhc_of_platform_init(struct sdhci_hos=
t *host)
> > =20
> > if (vvn > VENDOR_V_22)
> > host->quirks &=3D ~SDHCI_QUIRK_NO_BUSY_IRQ;
> > +
> > + host->mmc->caps |=3D MMC_CAP_8_BIT_DATA;
> > }
> >=20
>=20
> Shouldn't this check the "bus-width" property before setting the width?
>=20
> There might be an eMMC or SDIO with 4-bit interface connected.
This is for an eMMC chip we got and I THINK(this is new to me) that
this only allows 8 bit negotiation but I might be way off.
=20
Anyone knows for sure?
Jocke=
next prev parent reply other threads:[~2015-05-04 21:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-04 16:31 [PATCH 1/2] sdhci-of-esdhc: Support 8BIT bus width Joakim Tjernlund
2015-05-04 16:31 ` [PATCH 2/2] sdhci-of-esdhc: Pre divider starts at 1 Joakim Tjernlund
2015-05-04 17:31 ` [PATCH 1/2] sdhci-of-esdhc: Support 8BIT bus width Arnd Bergmann
2015-05-04 21:17 ` Joakim Tjernlund [this message]
2015-05-04 21:49 ` Joakim Tjernlund
2015-05-05 10:03 ` Arnd Bergmann
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