From patchwork Wed Nov 24 14:25:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ivan Bornyakov X-Patchwork-Id: 12693545 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 592EAC433EF for ; Wed, 24 Nov 2021 14:41:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=uI75zDh09grN/zF8T3AbGiTbCzjK96kt+cKiKT7L8zE=; b=bnmQe10MKVQ5u3 9RdB8CKZ3FWP1g6nHyEfTUbE0gGSGTYsdKhOSiYPclMTXULW9UAGFdvFlc/DcHs6C/jBiS+lBfZSH YWTtwcN8zOOrSygM/OHVmJ5Op79MwtF4C1g0gkN50/ADb9jEsSjkGucpi51nXMA3rYE1SISE3o8s7 OJ8GSI4BNEmZivqyWc9BZzv+Yg2AydlEr7UF7GuUQ7NdU345i6uy5+YgJ/KxwpEDD3dPjLc7dFV+h Fo6PsHVVtwUqII4cs4hj9c4k8jIZR9UsmZ5HNhXrWeedj6WQIIelBcfC13BDXEHJIv7uRXB9hPrR7 V0qhWyMvtq+6EBRLP7jw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mptRM-0050xM-PZ; Wed, 24 Nov 2021 14:40:04 +0000 Received: from mail.pr-group.ru ([178.18.215.3]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mptR8-0050sv-KJ for linux-arm-kernel@lists.infradead.org; Wed, 24 Nov 2021 14:39:52 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=metrotek.ru; s=mail; h=from:subject:date:message-id:to:cc:mime-version:content-transfer-encoding; bh=To9e4hBk+9KWTAv+yOOa9YU2qidFr8D9clDVYMRnqn8=; b=twqwQWfNlK8kMwmrtAIFufCQIhp2x37D35hlm2tP4b8+8EQdvP5yMlbFK7JBGyv/lgrOKL6qNfhqa s31gH6q9hw3I6AYEpBU05BSTfkAWlHzFNv8KKxCgD2St2C3ZSxt2FHkgbscxm9nQmvQb6QuKbkQjin CA4IvdQZkohzK/BVwM7eSbnQaKuLXa5BWVu5SdV3pQdkLeGEOygMBAZclZikVN3ZNDS2id618Mr4/K UlLeO7ccIMbV02QI7lBpMrZtyBhJbXva7Kk1HT46sUNHBgIeBXzCNrEVvxkf4LM6HVB70pT4rPdjYP Jx3pUn3tsPVxNtlDZilQXNOyxisK04Q== X-Footer: bWV0cm90ZWsucnU= Received: from localhost.localdomain ([178.66.213.198]) (authenticated user i.bornyakov@metrotek.ru) by mail.pr-group.ru with ESMTPSA (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256 bits)); Wed, 24 Nov 2021 17:39:38 +0300 From: Ivan Bornyakov To: Cc: shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, system@metrotek.ru, Ivan Bornyakov Subject: [PATCH] bus: imx-weim: optionally enable continuous burst clock Date: Wed, 24 Nov 2021 17:25:30 +0300 Message-Id: <20211124142530.366-1-i.bornyakov@metrotek.ru> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211124_063951_216633_7FD61312 X-CRM114-Status: GOOD ( 11.92 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org To enable continuous burst clock, add "fsl,continuous-burst-clk" along with "fsl,burst-clk-enable" property to the weim bus's devicetree node. Example: weim: weim@21b8000 { compatible = "fsl,imx6ul-weim", "fsl,imx6q-weim"; reg = <0x021b8000 0x4000>; clocks = <&clks 143>; #address-cells = <2>; #size-cells = <1>; ranges = <0 0 0x50000000 0x08000000>; fsl,weim-cs-gpr = <&gpr>; fsl,burst-clk-enable; fsl,continuous-burst-clk; client-device@0 { ... }; }; Signed-off-by: Ivan Bornyakov --- drivers/bus/imx-weim.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/drivers/bus/imx-weim.c b/drivers/bus/imx-weim.c index 28bb65a5613f..bccb275b65ba 100644 --- a/drivers/bus/imx-weim.c +++ b/drivers/bus/imx-weim.c @@ -21,6 +21,7 @@ struct imx_weim_devtype { unsigned int cs_stride; unsigned int wcr_offset; unsigned int wcr_bcm; + unsigned int wcr_cont_bclk; }; static const struct imx_weim_devtype imx1_weim_devtype = { @@ -41,6 +42,7 @@ static const struct imx_weim_devtype imx50_weim_devtype = { .cs_stride = 0x18, .wcr_offset = 0x90, .wcr_bcm = BIT(0), + .wcr_cont_bclk = BIT(3), }; static const struct imx_weim_devtype imx51_weim_devtype = { @@ -206,8 +208,20 @@ static int weim_parse_dt(struct platform_device *pdev, void __iomem *base) if (of_property_read_bool(pdev->dev.of_node, "fsl,burst-clk-enable")) { if (devtype->wcr_bcm) { reg = readl(base + devtype->wcr_offset); - writel(reg | devtype->wcr_bcm, - base + devtype->wcr_offset); + reg |= devtype->wcr_bcm; + + if (of_property_read_bool(pdev->dev.of_node, + "fsl,continuous-burst-clk")) { + if (devtype->wcr_cont_bclk) { + reg |= devtype->wcr_cont_bclk; + } else { + dev_err(&pdev->dev, + "continuous burst clk not supported.\n"); + return -EINVAL; + } + } + + writel(reg, base + devtype->wcr_offset); } else { dev_err(&pdev->dev, "burst clk mode not supported.\n"); return -EINVAL;