From patchwork Tue Apr 17 13:38:28 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabrice Gasnier X-Patchwork-Id: 10345075 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id CF65060216 for ; Tue, 17 Apr 2018 13:41:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B742424BFE for ; Tue, 17 Apr 2018 13:41:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A95F627480; Tue, 17 Apr 2018 13:41:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 07AF82625B for ; Tue, 17 Apr 2018 13:41:12 +0000 (UTC) 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=bRaKqQtW+qE+fHbTJi7ED67M1wyiAIfT488ZhQoDElA=; b=cPXIcNrvc0uZCV KsPRi7Tgu8qaOmlTbk9D8dek2WoRp0nkPDj7IruVxTERFYFGiN+g8BwFk4/D/Ojmyclq/02AMXYls cfRfWyzCiPZuKimLPVZY35DeNgfQIb3fiMfemA/HHU9MNdbrZCcG+esLMlbm278avgxeHYWiKOjmF ThgH3mC85qmWg7B5jgruIgpmGLOcMnsEDRiNuO/IgClJb289Gkz/FsQKnMMRgw8UUlBmbRL6bHDE9 ToktioSnux+ycZLlyyh2uCPpqtg7J4Vx4PsdfVl3UeQCHApxa05Zq1pSE4EW+EvS2aTYDZJTuwKQs FoJQ+CtXlszwgtpAIIKw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1f8Qqy-0002aw-QX; Tue, 17 Apr 2018 13:41:00 +0000 Received: from mx07-00178001.pphosted.com ([62.209.51.94]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1f8QpZ-0000U1-Gn for linux-arm-kernel@lists.infradead.org; Tue, 17 Apr 2018 13:39:37 +0000 Received: from pps.filterd (m0046668.ppops.net [127.0.0.1]) by mx07-.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id w3HDcnAh021164; Tue, 17 Apr 2018 15:39:06 +0200 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 2hbd6cy2uh-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Tue, 17 Apr 2018 15:39:06 +0200 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 9012538; Tue, 17 Apr 2018 13:39:01 +0000 (GMT) Received: from Webmail-eu.st.com (gpxdag5node6.st.com [10.75.127.79]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 4EAA64ECE; Tue, 17 Apr 2018 13:39:01 +0000 (GMT) Received: from localhost (10.75.127.123) by GPXDAG5NODE6.st.com (10.75.127.79) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Tue, 17 Apr 2018 15:39:00 +0200 From: Fabrice Gasnier To: , Subject: [PATCH v5 1/6] dt-bindings: mfd: stm32-timers: add support for dmas Date: Tue, 17 Apr 2018 15:38:28 +0200 Message-ID: <1523972313-28765-2-git-send-email-fabrice.gasnier@st.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1523972313-28765-1-git-send-email-fabrice.gasnier@st.com> References: <1523972313-28765-1-git-send-email-fabrice.gasnier@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.123] X-ClientProxiedBy: GPXDAG4NODE6.st.com (10.75.127.76) To GPXDAG5NODE6.st.com (10.75.127.79) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-04-17_07:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180417_063933_870308_7CB27C87 X-CRM114-Status: GOOD ( 10.63 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, mcoquelin.stm32@gmail.com, linux-pwm@vger.kernel.org, linux@armlinux.org.uk, linux-kernel@vger.kernel.org, robh+dt@kernel.org, thierry.reding@gmail.com, linux-arm-kernel@lists.infradead.org, benjamin.gaignard@linaro.org, fabrice.gasnier@st.com, dan.carpenter@oracle.com, benjamin.gaignard@st.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add support for DMAs to STM32 timers. STM32 Timers can support up to 7 dma requests: up to 4 channels, update, compare and trigger. DMAs may be used to transfer data from pwm capture for instance. DMA support is made optional, PWM capture support is also an option. This is much more wise system-wide to avoid shortage on DMA request lines as there's significant amount of timer instances that can request up to 7 channels. Signed-off-by: Fabrice Gasnier Reviewed-by: Rob Herring Reviewed-by: Benjamin Gaignard --- .../devicetree/bindings/mfd/stm32-timers.txt | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/Documentation/devicetree/bindings/mfd/stm32-timers.txt b/Documentation/devicetree/bindings/mfd/stm32-timers.txt index 1db6e00..0e900b5 100644 --- a/Documentation/devicetree/bindings/mfd/stm32-timers.txt +++ b/Documentation/devicetree/bindings/mfd/stm32-timers.txt @@ -19,6 +19,11 @@ Required parameters: Optional parameters: - resets: Phandle to the parent reset controller. See ../reset/st,stm32-rcc.txt +- dmas: List of phandle to dma channels that can be used for + this timer instance. There may be up to 7 dma channels. +- dma-names: List of dma names. Must match 'dmas' property. Valid + names are: "ch1", "ch2", "ch3", "ch4", "up", "trig", + "com". Optional subnodes: - pwm: See ../pwm/pwm-stm32.txt @@ -44,3 +49,18 @@ Example: reg = <0>; }; }; + +Example with all dmas: + timer@40010000 { + ... + dmas = <&dmamux1 11 0x400 0x0>, + <&dmamux1 12 0x400 0x0>, + <&dmamux1 13 0x400 0x0>, + <&dmamux1 14 0x400 0x0>, + <&dmamux1 15 0x400 0x0>, + <&dmamux1 16 0x400 0x0>, + <&dmamux1 17 0x400 0x0>; + dma-names = "ch1", "ch2", "ch3", "ch4", "up", "trig", "com"; + ... + child nodes... + };