linux-kernel - Re: [PATCH v5 0/13] arm64: allwinner: a64: Enable MMC support

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Date:   Mon, 30 Jan 2017 12:06:29 +0100
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Chen-Yu Tsai <wens@...e.org>, Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mmc@...r.kernel.org, Andre Przywara <andre.przywara@....com>
Subject: Re: [PATCH v5 0/13] arm64: allwinner: a64: Enable MMC support

On Fri, Jan 27, 2017 at 10:38:32PM +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.
> 
> Let me know what you think,
> Maxime

Applied the DT bits with Chen-Yu's Acked-by.

Maxime

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

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