From patchwork Fri Sep 23 00:03:10 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Lin X-Patchwork-Id: 9347177 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 EC56D6077A for ; Fri, 23 Sep 2016 00:02:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DBE772AC40 for ; Fri, 23 Sep 2016 00:02:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D0A122AD13; Fri, 23 Sep 2016 00:02:43 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 60C9D2AC40 for ; Fri, 23 Sep 2016 00:02:43 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bnDwx-0004Mj-1v; Fri, 23 Sep 2016 00:02:43 +0000 Received: from lucky1.263xmail.com ([211.157.147.132]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bnDwq-0004Gm-1O for linux-rockchip@lists.infradead.org; Fri, 23 Sep 2016 00:02:38 +0000 Received: from shawn.lin?rock-chips.com (unknown [192.168.167.179]) by lucky1.263xmail.com (Postfix) with ESMTP id 9AE3C63597; Fri, 23 Sep 2016 08:02:12 +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 F1483389; Fri, 23 Sep 2016 08:02:11 +0800 (CST) X-RL-SENDER: shawn.lin@rock-chips.com X-FST-TO: jh80.chung@samsung.com X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: shawn.lin@rock-chips.com X-UNIQUE-TAG: 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 26809KC4W6I; Fri, 23 Sep 2016 08:02:12 +0800 (CST) From: Shawn Lin To: Jaehoon Chung , Ulf Hansson Subject: [PATCH v2 3/4] mmc: sdhci: Don't try to switch to unsupported voltage Date: Fri, 23 Sep 2016 08:03:10 +0800 Message-Id: <1474588991-10344-3-git-send-email-shawn.lin@rock-chips.com> X-Mailer: git-send-email 1.8.0 In-Reply-To: <1474588991-10344-1-git-send-email-shawn.lin@rock-chips.com> References: <1474588991-10344-1-git-send-email-shawn.lin@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160922_170236_563994_77C61889 X-CRM114-Status: UNSURE ( 6.59 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-rockchip@lists.infradead.org, Shawn Lin , Ziyuan Xu , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.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 --- Changes in v2: None 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);