From patchwork Tue Oct 20 09:13:08 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chaotian Jing X-Patchwork-Id: 7444521 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id D78579F506 for ; Tue, 20 Oct 2015 09:17:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 060D720844 for ; Tue, 20 Oct 2015 09:17:31 +0000 (UTC) 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.kernel.org (Postfix) with ESMTPS id 32CF320822 for ; Tue, 20 Oct 2015 09:17:30 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZoT1J-0002Ey-Ch; Tue, 20 Oct 2015 09:15:49 +0000 Received: from [210.61.82.184] (helo=mailgw02.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZoT00-0007UR-El; Tue, 20 Oct 2015 09:14:29 +0000 X-Listener-Flag: 11101 Received: from mtkhts09.mediatek.inc [(172.21.101.70)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1324096142; Tue, 20 Oct 2015 17:14:06 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkhts09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 14.3.181.6; Tue, 20 Oct 2015 17:14:05 +0800 From: Chaotian Jing To: Ulf Hansson Subject: [PATCH v2 6/9] mmc: mediatek: add implement of ops->hw_reset() Date: Tue, 20 Oct 2015 17:13:08 +0800 Message-ID: <1445332391-30530-7-git-send-email-chaotian.jing@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1445332391-30530-1-git-send-email-chaotian.jing@mediatek.com> References: <1445332391-30530-1-git-send-email-chaotian.jing@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151020_021428_954726_DB356BC4 X-CRM114-Status: GOOD ( 15.73 ) X-Spam-Score: -1.1 (-) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Krzysztof Kozlowski , Seungwon Jeon , Catalin Marinas , Will Deacon , linux-kernel@vger.kernel.org, Minda Chen , Dong Aisheng , Lars-Peter Clausen , Weijun Yang , Jaehoon Chung , linux-samsung-soc@vger.kernel.org, Howard Chen , Kukjin Kim , linux-arm-kernel@lists.infradead.org, linux-mmc@vger.kernel.org, ivan.ivanov@linaro.org, devicetree@vger.kernel.org, Pawel Moll , Ian Campbell , Sascha Hauer , Hans de Goede , Rob Herring , linux-mediatek@lists.infradead.org, Matthias Brugger , Chaotian Jing , Fabio Estevam , Barry Song , Kevin Hao , srv_heupstream@mediatek.com, Sergei Shtylyov , Haibo Chen , Stephen Boyd , Adrian Hunter , Georgi Djakov , Kumar Gala , Johan Derycke , Javier Martinez Canillas Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP add implement of ops->hw_reset() for eMMC Signed-off-by: Chaotian Jing --- drivers/mmc/host/mtk-sd.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index 3858163..5627644 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -64,6 +64,7 @@ #define SDC_RESP2 0x48 #define SDC_RESP3 0x4c #define SDC_BLK_NUM 0x50 +#define EMMC_IOCON 0x7c #define SDC_ACMD_RESP 0x80 #define MSDC_DMA_SA 0x90 #define MSDC_DMA_CTRL 0x98 @@ -1209,6 +1210,15 @@ end: pm_runtime_put_autosuspend(host->dev); } +static void msdc_hw_reset(struct mmc_host *mmc) +{ + struct msdc_host *host = mmc_priv(mmc); + + sdr_set_bits(host->base + EMMC_IOCON, 1); + udelay(10); /* 10us is enough */ + sdr_clr_bits(host->base + EMMC_IOCON, 1); +} + static struct mmc_host_ops mt_msdc_ops = { .post_req = msdc_post_req, .pre_req = msdc_pre_req, @@ -1216,6 +1226,7 @@ static struct mmc_host_ops mt_msdc_ops = { .set_ios = msdc_ops_set_ios, .start_signal_voltage_switch = msdc_ops_switch_volt, .card_busy = msdc_card_busy, + .hw_reset = msdc_hw_reset, }; static int msdc_drv_probe(struct platform_device *pdev)