On Tue, Jan 24, 2017 at 09:18:46AM +0100, Ulf Hansson wrote: > On 16 January 2017 at 17:56, Maxime Ripard > <maxime.ripard@xxxxxxxxxxxxxxxxxx> 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
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