From patchwork Wed Sep 21 01:43:52 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Lin X-Patchwork-Id: 9342675 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 8C8A860B16 for ; Wed, 21 Sep 2016 01:44:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7F97C29B52 for ; Wed, 21 Sep 2016 01:44:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 746B329B57; Wed, 21 Sep 2016 01:44:02 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.4 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RCVD_IN_SORBS_SPAM autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 280B629B52 for ; Wed, 21 Sep 2016 01:44:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932792AbcIUBnn (ORCPT ); Tue, 20 Sep 2016 21:43:43 -0400 Received: from lucky1.263xmail.com ([211.157.147.134]:53211 "EHLO lucky1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932633AbcIUBnl (ORCPT ); Tue, 20 Sep 2016 21:43:41 -0400 Received: from shawn.lin?rock-chips.com (unknown [192.168.167.164]) by lucky1.263xmail.com (Postfix) with ESMTP id 5EAD76D7; Wed, 21 Sep 2016 09:43:37 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 1 X-MAIL-DELIVERY: 0 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED4: 1 Received: from localhost.localdomain (localhost [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id E0AC53EC; Wed, 21 Sep 2016 09:43:34 +0800 (CST) X-RL-SENDER: shawn.lin@rock-chips.com X-FST-TO: ulf.hansson@linaro.org X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: shawn.lin@rock-chips.com X-UNIQUE-TAG: <8a793eaedc062b7a3cc688275f1cdb3b> X-ATTACHMENT-NUM: 0 X-SENDER: lintao@rock-chips.com X-DNS-TYPE: 0 Received: from unknown (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith SMTP id 17502WFJMI4; Wed, 21 Sep 2016 09:43:36 +0800 (CST) From: Shawn Lin To: Ulf Hansson Cc: Adrian Hunter , Jaehoon Chung , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, Ziyuan Xu , Shawn Lin Subject: [PATCH 4/5] mmc: sdhci: Don't try to switch to unsupported voltage Date: Wed, 21 Sep 2016 09:43:52 +0800 Message-Id: <1474422233-29355-5-git-send-email-shawn.lin@rock-chips.com> X-Mailer: git-send-email 1.8.0 In-Reply-To: <1474422233-29355-1-git-send-email-shawn.lin@rock-chips.com> References: <1474422233-29355-1-git-send-email-shawn.lin@rock-chips.com> Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ziyuan Xu Sdhci shouldn't switch to the unsupported voltage if claiming that it can not support the requested voltage. Let's fix it. Signed-off-by: Ziyuan Xu Signed-off-by: Shawn Lin --- drivers/mmc/host/sdhci.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 4805566..b1f1edd 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1845,7 +1845,8 @@ static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc, switch (ios->signal_voltage) { case MMC_SIGNAL_VOLTAGE_330: - if (!(host->flags & SDHCI_SIGNALING_330)) + if (!(host->flags & SDHCI_SIGNALING_330) || + !(host->caps & SDHCI_CAN_VDD_330)) return -EINVAL; /* Set 1.8V Signal Enable in the Host Control2 register to 0 */ ctrl &= ~SDHCI_CTRL_VDD_180; @@ -1872,7 +1873,8 @@ static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc, return -EAGAIN; case MMC_SIGNAL_VOLTAGE_180: - if (!(host->flags & SDHCI_SIGNALING_180)) + if (!(host->flags & SDHCI_SIGNALING_180) || + !(host->caps & SDHCI_CAN_VDD_180)) return -EINVAL; if (!IS_ERR(mmc->supply.vqmmc)) { ret = mmc_regulator_set_vqmmc(mmc, ios);