From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maxime Ripard Subject: Re: [PATCH v4 0/13] arm64: allwinner: a64: Enable MMC support Date: Fri, 27 Jan 2017 22:27:06 +0100 Message-ID: <20170127212706.c65js5aw7itugfky@lukather> References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="bftvt4nsmv4cs76e" Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Florian Vaussard Cc: Chen-Yu Tsai , Ulf Hansson , Rob Herring , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, Andre Przywara List-Id: devicetree@vger.kernel.org --bftvt4nsmv4cs76e Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Florian, On Fri, Jan 27, 2017 at 11:37:27AM +0100, Florian Vaussard wrote: > Hi Maxime, >=20 > On 01/26/2017 10:05 AM, Maxime Ripard wrote: > > Hi, > >=20 > > Here is a new attempt at getting the MMC controllers running, following= the > > work done by Andre. > >=20 > > This has been tested on a board with one SDIO device (a Marvell WiFi ch= ip) > > and a Kingston eMMC with 1.8V IOs. > >=20 > > 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. > >=20 > > 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. > >=20 > > Let me know what you think, > > Maxime > >=20 >=20 > FWIW I tested this series and got decent throughput (190 Mbps in UDP) wit= h a > Marvell SDIO Wifi chip. The board becomes unresponsive between 30 to 60 m= inutes > of iperf torture, but I strongly suspect a hardware issue underneath. Fee= l free > to add my Tested-by on the MMC patches if you need it. Thanks for testing! Maxime --=20 Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com --bftvt4nsmv4cs76e Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIcBAEBCAAGBQJYi7spAAoJEBx+YmzsjxAgs0QQALFIKvXGwhYyU7w1qwSGeZ84 vNIWGfGtu/N2Uc2g/pTo+laJViZ7UUmMhwPcIfiI0YmN6iEs0Vl1FxDy7aO/+75O X1gdmwVwMMD8eHTtnBCT0I9IJ3LGQEB+LW4wrEwyv5jNmPc+VScD4kknC3Ngq5ry 7QPJc47+zpi1ChAGSzV9er1LamLAC5EyzHwVn2McAToJsQc5WEOvJCiHh+XZgV6N fbNfVCMDQZMmFQiHsMS7s10T70n/YcDEpWZUq1KMMr7gP5L5B4dZ12EjLU7vjVF1 UVqmV6uBEVEzo9dpsBmeJaSeIZNb5KG4RnY92p1f3OHE4gUji4c1+0J3e0vw/rQn xZjqd+OS6NmGG0BdgfnXBI+0SUJ8nkd2kPrAF9NBhBe83QGhX59TP8kxbSIVgAuN RNOpbtSHDWWQ2XTWcEI7T2Z8wUHJWDeKFC1IYREaXywGGGxLmVU7chlZXkVmcxA2 xH6gAoZE71+W8QaI9/H+uI9idQtwP2bpFR4EvqPBaNxKzfV07GgRZmBBdrpdhV6T pWsqoixxWoYzKcvjRlW0efcVKCGUV37ceyGu/Wc8Ypz8KMVBcTj84VJIn6ZVdvYy zsy6S6zFq6/99ID+60A2JqZmp+1tG6uSVvJfwpiwhrUA2RnXbAkYLicbFlmaownf Y2SWqBm+QyWvAzqOmrph =nWp3 -----END PGP SIGNATURE----- --bftvt4nsmv4cs76e--