From mboxrd@z Thu Jan 1 00:00:00 1970 From: maxime.ripard@free-electrons.com (Maxime Ripard) Date: Wed, 25 Jan 2017 10:16:13 +0100 Subject: [PATCH v3 5/13] mmc: sunxi: Mask DATA0 when updating the clock In-Reply-To: References: Message-ID: <20170125091613.hmlqoeh6hlqh57wh@lukather> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, Jan 24, 2017 at 09:18:46AM +0100, Ulf Hansson wrote: > On 16 January 2017 at 17:56, Maxime Ripard > wrote: > > The A64 MMC controllers need DATA0 to be masked while updating the clock, > > otherwise any subsequent command will result in a timeout. > > Could you elaborate on what mask DATA0 really means? I don't follow. To be honest, I don't really know :) This is how it's called both in the vendor tree and the datasheet. I *think* it might be the first data line on the bus, but I'm not sure exactly why that would cause any issue when updating the clock. Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 801 bytes Desc: not available URL: