From mboxrd@z Thu Jan 1 00:00:00 1970 From: thomas.petazzoni@free-electrons.com (Thomas Petazzoni) Date: Thu, 13 Nov 2014 09:07:17 +0100 Subject: [PATCH 2/5] ARM: mvebu: enable no-1-8-v flag for Armada 385 DB SDHCI interface In-Reply-To: <1415835600-97188-3-git-send-email-mw@semihalf.com> References: <1415835600-97188-1-git-send-email-mw@semihalf.com> <1415835600-97188-3-git-send-email-mw@semihalf.com> Message-ID: <20141113090717.5fc5d163@free-electrons.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Dear Marcin Wojtas, On Thu, 13 Nov 2014 00:39:57 +0100, Marcin Wojtas wrote: > The Marvell Armada 38x SoC's SDHCI interface is capable of using 1.8v voltage, > needed for driving "UHS-I" SD cards at their full speed. It is not, however, > possible on the DB board. Due to physical connectivity connector supply is tied > to 3v and any attempt of changing voltage in order to operate in the fastest UHS > modes fails. > > This patch enables equivalent SDHCI quirk in order to adjust controller > operation to system capabilities. > > Signed-off-by: Marcin Wojtas > Reviewed-by: Gregory CLEMENT Acked-by: Thomas Petazzoni -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com