From patchwork Thu Dec 2 05:57:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ivan Bornyakov X-Patchwork-Id: 12694434 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 B4861C433EF for ; Thu, 2 Dec 2021 06:13:54 +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:References:In-Reply-To: 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: List-Owner; bh=uI75zDh09grN/zF8T3AbGiTbCzjK96kt+cKiKT7L8zE=; b=kmR51AI52FuqMk 0sGLYKqlGgjmYd38a//bQUfO867RkYBRjg9jD6nYV+sLUvZjlPNdUJS1CPdYhRRTUmVK8YQt4exsI BHkkrzM4Uz4V5toCmAclhk7zJ/7EXHG6QGyIPbHMkzEOrB3dVZCV1BpUK6Ms/pmZJxPraBQIRqU58 BsAjkooR2kF3hszWDDi2p865U4EFzNQbHzC5N0T//bBHhPuJkg8taCpSj5lQBSQ4tkwFjHlJ0slbT LqqzzvTqRJR3YumKxqAo7blkeoJ/7Yoq2Gch/AcQJfk5zj2O99CEuHkhX7f4//USF6j7BaLbga4nZ id9pZwvvDH4fqa6Awzmw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1msfKb-00B1Lv-Ti; Thu, 02 Dec 2021 06:12:34 +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 1msfKA-00B1FR-Tz for linux-arm-kernel@lists.infradead.org; Thu, 02 Dec 2021 06:12:09 +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: in-reply-to:references; bh=To9e4hBk+9KWTAv+yOOa9YU2qidFr8D9clDVYMRnqn8=; b=bnOGgqZkJ1T+2I8+s6m7X5X4jWrlc4UH8ZkUo8Is9ZTW0ungB3o/HbuimA1TzLF3/DzE+tqxkR+iE Ml3diVWRYS4dwpMoY15NiPmroo1rrM4rkbCnfz/nZtz3Tz53uyJ0e/XsP2EnSwqvtsuipDMgRv8/65 zQmJxo0DKfHwjSc401t4dlU2ULPwF0/Qkh4MTMeyAhGHXUrL2WmlTm7Fabq0p6nz0ZR89uRb5kgS9G CKJFL0BbZAwxVbp7Nn+tt4HZP4l97DddJXgrx17Hpn2ZFbYaxhtbO4nE3+KmPpngN03CnAJZYNQK1c Lwcbvb56NDdUZIt4Cg9WUNUFayge8ig== X-Footer: bWV0cm90ZWsucnU= Received: from localhost.localdomain ([178.70.66.234]) (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)); Thu, 2 Dec 2021 09:11:56 +0300 From: Ivan Bornyakov To: Cc: Ivan Bornyakov , system@metrotek.ru, 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, robh+dt@kernel.org, devicetree@vger.kernel.org Subject: [PATCH v3 1/2] bus: imx-weim: optionally enable continuous burst clock Date: Thu, 2 Dec 2021 08:57:23 +0300 Message-Id: <20211202055724.4416-2-i.bornyakov@metrotek.ru> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211202055724.4416-1-i.bornyakov@metrotek.ru> References: <20211202055724.4416-1-i.bornyakov@metrotek.ru> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211201_221207_346140_8FEF54BE X-CRM114-Status: GOOD ( 12.39 ) 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;