From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4BCF4C3A5A1 for ; Wed, 28 Aug 2019 13:43:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1F973233FF for ; Wed, 28 Aug 2019 13:43:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566999819; bh=PfdDBsRCBBChXNzCDotQ1Pc7yIyNBpQQ3ATlOtaDOC0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=IYS1/Po+VLuMhWUOMdsAfqSqWG441ZCBUBtR+eTjm65Ft+0bYNP/OEmlSijjH5iRK G/K6pSrevb9/ypWTwgnOBvYD//3tTOxblDlDiS9+t9dVH9T7xTreb9tlFIgO8/Sk+r HIuBPKP/EYriqyqKFocJOjI/gmFbQGD4IFENL8do= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726560AbfH1Nni (ORCPT ); Wed, 28 Aug 2019 09:43:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:47132 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726341AbfH1Nnh (ORCPT ); Wed, 28 Aug 2019 09:43:37 -0400 Received: from localhost (lfbn-1-17395-211.w86-250.abo.wanadoo.fr [86.250.200.211]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4C5B022CF5; Wed, 28 Aug 2019 13:43:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566999816; bh=PfdDBsRCBBChXNzCDotQ1Pc7yIyNBpQQ3ATlOtaDOC0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=vrdJ3HfPobb2OsDW8pbRC6kIQu+M8yr50ucNLFVYTeNTKvLnO6nyKvDDpbmHFOJae BH6dkijIWCasP0rO2X7LUyBR1E1ZIsj6yaAd2rKfKTLspoDx1SyGcEY5p9+FHRy4q1 m8OXKEa1iDTbzsnltW5dZ5sSPKxK/nsX6gP28+Ik= Date: Wed, 28 Aug 2019 15:43:34 +0200 From: Maxime Ripard To: Chen-Yu Tsai Cc: Alejandro =?utf-8?B?R29uesOhbGV6?= , Linus Walleij , Ulf Hansson , Greg KH , Thomas Gleixner , linux-mmc , Linux ARM , "linux-kernel@vger.kernel.org" , linux-sunxi Subject: Re: [linux-sunxi] Re: [PATCH] mmc: sunxi: fix unusuable eMMC on some H6 boards by disabling DDR Message-ID: <20190828134334.qzuwodoxmw7ov5yg@flea> References: <20190825150558.15173-1-alejandro.gonzalez.correo@gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="v6flhv747vrdixqb" Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20180716 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --v6flhv747vrdixqb Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Aug 28, 2019 at 09:29:32PM +0800, Chen-Yu Tsai wrote: > On Wed, Aug 28, 2019 at 8:52 PM Linus Walleij = wrote: > > > > On Sun, Aug 25, 2019 at 5:06 PM Alejandro Gonz=E1lez > > wrote: > > > > > Jernej Skrabec compared the BSP driver with this > > > driver, and found that the BSP driver configures pinctrl to operate at > > > 1.8 V when entering DDR mode (although 3.3 V operation is supported),= while > > > the mainline kernel lacks any mechanism to switch voltages dynamicall= y. > > AFAIK The Pine H64 does not have the ability to switch I/O voltages. It is > fixed to either 1.8V (the default based on the schematics) or 3.3V. Should that be handled at the board level then maybe? Maxime -- Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com --v6flhv747vrdixqb Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCXWaFBgAKCRDj7w1vZxhR xUbcAQDTgCwVjSWuZKxoSkt/fp1VLfWi1UjCpSZ0cCr11a5BwAD8DLgodYfexZWL iW8NfsUfcOV7SktdFUgfMP1x74uruwE= =sxYW -----END PGP SIGNATURE----- --v6flhv747vrdixqb--