Hi Florian,

On Fri, Jan 27, 2017 at 11:37:27AM +0100, Florian Vaussard wrote:

Hi Maxime,

On 01/26/2017 10:05 AM, Maxime Ripard wrote:

quoted

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.

Let me know what you think,
Maxime

FWIW I tested this series and got decent throughput (190 Mbps in UDP) with a
Marvell SDIO Wifi chip. The board becomes unresponsive between 30 to 60 minutes
of iperf torture, but I strongly suspect a hardware issue underneath. Feel free
to add my Tested-by on the MMC patches if you need it.

Thanks for testing!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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