From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:54221 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932218AbcJZMBl (ORCPT ); Wed, 26 Oct 2016 08:01:41 -0400 Subject: Patch "mmc: core: switch to 1V8 or 1V2 for hs400es mode" has been added to the 4.8-stable tree To: shawn.lin@rock-chips.com, dianders@chromium.org, gregkh@linuxfoundation.org, ulf.hansson@linaro.org Cc: , From: Date: Wed, 26 Oct 2016 14:00:00 +0200 Message-ID: <14774832002014@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled mmc: core: switch to 1V8 or 1V2 for hs400es mode to the 4.8-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mmc-core-switch-to-1v8-or-1v2-for-hs400es-mode.patch and it can be found in the queue-4.8 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 1720d3545b772c49b2975eeb3b8f4d3f56dc2085 Mon Sep 17 00:00:00 2001 From: Shawn Lin Date: Fri, 30 Sep 2016 14:18:58 +0800 Subject: mmc: core: switch to 1V8 or 1V2 for hs400es mode From: Shawn Lin commit 1720d3545b772c49b2975eeb3b8f4d3f56dc2085 upstream. When introducing hs400es, I didn't notice that we haven't switched voltage to 1V2 or 1V8 for it. That happens to work as the first controller claiming to support hs400es, arasan(5.1), which is designed to only support 1V8. So the voltage is fixed to 1V8. But it actually is wrong, and will not fit for other host controllers. Let's fix it. Fixes: commit 81ac2af65793ecf ("mmc: core: implement enhanced strobe support") Signed-off-by: Shawn Lin Reviewed-by: Douglas Anderson Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/core/mmc.c | 10 ++++++++++ 1 file changed, 10 insertions(+) --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -1259,6 +1259,16 @@ static int mmc_select_hs400es(struct mmc goto out_err; } + if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V) + err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); + + if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V) + err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); + + /* If fails try again during next card power cycle */ + if (err) + goto out_err; + err = mmc_select_bus_width(card); if (err < 0) goto out_err; Patches currently in stable-queue which might be from shawn.lin@rock-chips.com are queue-4.8/mmc-core-switch-to-1v8-or-1v2-for-hs400es-mode.patch