From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,T_DKIMWL_WL_HIGH,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 22331C282DD for ; Mon, 10 Jun 2019 12:25:20 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E913920820 for ; Mon, 10 Jun 2019 12:25:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="g3Re1m6G" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E913920820 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=H1VeyutdNKYgHo7syag70ZDeZsC+AGlovHYVf4Z8RQY=; b=g3Re1m6Gr8Wpwe TItF2nmfZcHbiSzUlLdlaozeLyHQiuMvTYeMde7Yqmlj/1KexbaKBBGNCoST32RdUc8S550YywtcB YTga3gNetUxs0Ge0zRhTBYeqvP7jFzz8JCqnUTgZh+aTQSWNRV8XV3rdXLinksZy9RBP582QaBLXF Sw5B0DQmLjY8v9nwNS/yvAHmvY32vpVgAPd1fQxlNL1G7b1vkqLMcp5kSV+CSjaFJZCuPjg3T1kSJ 9LbmFmyQeDXT2vQ5pWSRQ2mOh32cgrqop7OzaDwESncTvxq1KyuUGXShKUnPRbR5zkeyW2VVCTNM3 sn/0tCGFMNlCoX8kwQYw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1haJMP-0004Ym-W8; Mon, 10 Jun 2019 12:25:14 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1haJIk-0000EM-EZ; Mon, 10 Jun 2019 12:21:30 +0000 X-UUID: bd7e3212bf1646be96e7a8cf48e035f1-20190610 X-UUID: bd7e3212bf1646be96e7a8cf48e035f1-20190610 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 1851677230; Mon, 10 Jun 2019 04:20:49 -0800 Received: from mtkmbs07n1.mediatek.inc (172.21.101.16) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 10 Jun 2019 05:20:48 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 10 Jun 2019 20:20:47 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 10 Jun 2019 20:20:45 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Robin Murphy , Rob Herring Subject: [PATCH v7 12/21] memory: mtk-smi: Add gals support Date: Mon, 10 Jun 2019 20:17:51 +0800 Message-ID: <1560169080-27134-13-git-send-email-yong.wu@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1560169080-27134-1-git-send-email-yong.wu@mediatek.com> References: <1560169080-27134-1-git-send-email-yong.wu@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-20190610_052127_005529_CFE79B9D X-CRM114-Status: GOOD ( 15.46 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: youlin.pei@mediatek.com, devicetree@vger.kernel.org, Nicolas Boichat , srv_heupstream@mediatek.com, Will Deacon , linux-kernel@vger.kernel.org, Evan Green , Tomasz Figa , iommu@lists.linux-foundation.org, Matthias Kaehlcke , linux-mediatek@lists.infradead.org, yong.wu@mediatek.com, yingjoe.chen@mediatek.com, anan.sun@mediatek.com, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org In some SoCs like mt8183, SMI add GALS(Global Async Local Sync) module which can help synchronize for the modules in different clock frequency. It can be seen as a "asynchronous fifo". This is a example diagram: M4U | ---------- | | gals0-rx gals1-rx | | | | gals0-tx gals1-tx | | ------------ SMI Common ------------ | +-----+--------+-----+- ... | | | | | gals-rx gals-rx | | | | | | | | | | gals-tx gals-tx | | | | | larb1 larb2 larb3 larb4 GALS only help transfer the command/data while it doesn't have the configuring register, thus it has the special "smi" clock and doesn't have the "apb" clock. From the diagram above, we add "gals0" and "gals1" clocks for smi-common and add a "gals" clock for smi-larb. This patch adds gals clock supporting in the SMI. Note that some larbs may still don't have the "gals" clock like larb1 and larb4 above. This is also a preparing patch for mt8183 which has GALS. CC: Matthias Brugger Signed-off-by: Yong Wu Reviewed-by: Evan Green --- drivers/memory/mtk-smi.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c index 8a2f968..91634d7 100644 --- a/drivers/memory/mtk-smi.c +++ b/drivers/memory/mtk-smi.c @@ -56,6 +56,7 @@ enum mtk_smi_gen { struct mtk_smi_common_plat { enum mtk_smi_gen gen; + bool has_gals; }; struct mtk_smi_larb_gen { @@ -63,11 +64,13 @@ struct mtk_smi_larb_gen { int port_in_larb[MTK_LARB_NR_MAX + 1]; void (*config_port)(struct device *); unsigned int larb_direct_to_common_mask; + bool has_gals; }; struct mtk_smi { struct device *dev; struct clk *clk_apb, *clk_smi; + struct clk *clk_gals0, *clk_gals1; struct clk *clk_async; /*only needed by mt2701*/ void __iomem *smi_ao_base; @@ -99,8 +102,20 @@ static int mtk_smi_enable(const struct mtk_smi *smi) if (ret) goto err_disable_apb; + ret = clk_prepare_enable(smi->clk_gals0); + if (ret) + goto err_disable_smi; + + ret = clk_prepare_enable(smi->clk_gals1); + if (ret) + goto err_disable_gals0; + return 0; +err_disable_gals0: + clk_disable_unprepare(smi->clk_gals0); +err_disable_smi: + clk_disable_unprepare(smi->clk_smi); err_disable_apb: clk_disable_unprepare(smi->clk_apb); err_put_pm: @@ -110,6 +125,8 @@ static int mtk_smi_enable(const struct mtk_smi *smi) static void mtk_smi_disable(const struct mtk_smi *smi) { + clk_disable_unprepare(smi->clk_gals1); + clk_disable_unprepare(smi->clk_gals0); clk_disable_unprepare(smi->clk_smi); clk_disable_unprepare(smi->clk_apb); pm_runtime_put_sync(smi->dev); @@ -310,6 +327,15 @@ static int mtk_smi_larb_probe(struct platform_device *pdev) larb->smi.clk_smi = devm_clk_get(dev, "smi"); if (IS_ERR(larb->smi.clk_smi)) return PTR_ERR(larb->smi.clk_smi); + + if (larb->larb_gen->has_gals) { + /* The larbs may still haven't gals even if the SoC support.*/ + larb->smi.clk_gals0 = devm_clk_get(dev, "gals"); + if (PTR_ERR(larb->smi.clk_gals0) == -ENOENT) + larb->smi.clk_gals0 = NULL; + else if (IS_ERR(larb->smi.clk_gals0)) + return PTR_ERR(larb->smi.clk_gals0); + } larb->smi.dev = dev; if (larb->larb_gen->need_larbid) { @@ -402,6 +428,16 @@ static int mtk_smi_common_probe(struct platform_device *pdev) if (IS_ERR(common->clk_smi)) return PTR_ERR(common->clk_smi); + if (common->plat->has_gals) { + common->clk_gals0 = devm_clk_get(dev, "gals0"); + if (IS_ERR(common->clk_gals0)) + return PTR_ERR(common->clk_gals0); + + common->clk_gals1 = devm_clk_get(dev, "gals1"); + if (IS_ERR(common->clk_gals1)) + return PTR_ERR(common->clk_gals1); + } + /* * for mtk smi gen 1, we need to get the ao(always on) base to config * m4u port, and we need to enable the aync clock for transform the smi -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel