From patchwork Wed Apr 27 04:14:46 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Lin X-Patchwork-Id: 8952431 Return-Path: X-Original-To: patchwork-linux-rockchip@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id DCB60BF29F for ; Wed, 27 Apr 2016 04:16:09 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1549F201C7 for ; Wed, 27 Apr 2016 04:16:09 +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 320FB201BB for ; Wed, 27 Apr 2016 04:16:08 +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 1avGtR-00011d-KR; Wed, 27 Apr 2016 04:16:05 +0000 Received: from lucky1.263xmail.com ([211.157.147.133]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1avGtO-00010o-Uf for linux-rockchip@lists.infradead.org; Wed, 27 Apr 2016 04:16:04 +0000 Received: from shawn.lin?rock-chips.com (unknown [192.168.167.234]) by lucky1.263xmail.com (Postfix) with SMTP id EB4F25405D; Wed, 27 Apr 2016 12:15:34 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 1 X-MAIL-DELIVERY: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED: 0 X-KSVirus-check: 0 Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id 08EF73EA4; Wed, 27 Apr 2016 12:15:33 +0800 (CST) X-RL-SENDER: shawn.lin@rock-chips.com X-FST-TO: adrian.hunter@intel.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 localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith ESMTP id 19465LS49OE; Wed, 27 Apr 2016 12:15:35 +0800 (CST) From: Shawn Lin To: Adrian Hunter , Ulf Hansson Subject: [PATCH] mmc: sdhci-of-arasan: refactor set_clock callback Date: Wed, 27 Apr 2016 12:14:46 +0800 Message-Id: <1461730486-8830-1-git-send-email-shawn.lin@rock-chips.com> X-Mailer: git-send-email 1.8.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160426_211603_452611_5C78D88E X-CRM114-Status: UNSURE ( 7.28 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -1.9 (-) 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: Heiko Stuebner , linux-kernel@vger.kernel.org, Shawn Lin , linux-mmc@vger.kernel.org, Doug Anderson , Michal Simek , linux-rockchip@lists.infradead.org, soren.brinkmann@xilinx.com MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 commit 61b914eb81f8 ("mmc: sdhci-of-arasan: add phy support for sdhci-of-arasan") introduce phy support for arasan. According to the vendor's databook, we should make sure the phy is in poweroff status before we configure the clk stuff. Otherwise it may cause some IO sample timing issues from the test. And we don't need this extra operation while running in low perfermance mode since phy doesn't trigger sampling block. Signed-off-by: Shawn Lin --- drivers/mmc/host/sdhci-of-arasan.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c index 2e482b1..20b859e 100644 --- a/drivers/mmc/host/sdhci-of-arasan.c +++ b/drivers/mmc/host/sdhci-of-arasan.c @@ -55,8 +55,26 @@ static unsigned int sdhci_arasan_get_timeout_clock(struct sdhci_host *host) return freq; } +static void sdhci_arasan_set_clock(struct sdhci_host *host, unsigned int clock) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host); + bool ctrl_phy = false; + + if (clock > MMC_HIGH_52_MAX_DTR && (!IS_ERR(sdhci_arasan->phy))) + ctrl_phy = true; + + if (ctrl_phy) + phy_power_off(sdhci_arasan->phy); + + sdhci_set_clock(host, clock); + + if (ctrl_phy) + phy_power_on(sdhci_arasan->phy); +} + static struct sdhci_ops sdhci_arasan_ops = { - .set_clock = sdhci_set_clock, + .set_clock = sdhci_arasan_set_clock, .get_max_clock = sdhci_pltfm_clk_get_max_clock, .get_timeout_clock = sdhci_arasan_get_timeout_clock, .set_bus_width = sdhci_set_bus_width,