Hi Ulf, On Mon, Jan 16, 2017 at 05:56:50PM +0100, Maxime Ripard wrote: > Hi, > > Here is a new attempt at getting the MMC controllers running, following the > work done by Andre. > > This has been tested on a board with one SDIO device (a Marvell WiFi chip) > and a Kingston eMMC with 1.8V IOs. > > For SDIO, the HS DDR mode works just fine. That serie also enables the > SDR104 mode to work on the devices that are capable of this. > > For the eMMC, HS200 with the voltage switch works. HS400 doesn't at the > moment, but since it's significantly more complex, and at the same time > Allwinner recommends to limit its frequency to 100MHz, this doesn't have > any benefits. If there's any at some point, this can be added later. Unless you have objections, I'd really like this to be in 4.11. There's a bunch of things where I'm not entirely sure (especially the clock gating part), it would be great if you could have a look. Thanks! Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
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