Re: [PATCH v3 5/13] mmc: sunxi: Mask DATA0 when updating the clock
From: Maxime Ripard <hidden>
Date: 2017-01-25 09:16:27
Also in:
linux-arm-kernel, linux-mmc, lkml
On Tue, Jan 24, 2017 at 09:18:46AM +0100, Ulf Hansson wrote:
On 16 January 2017 at 17:56, Maxime Ripard [off-list ref] wrote:quoted
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
Attachments
- signature.asc [application/pgp-signature] 801 bytes