From patchwork Fri Mar 30 10:01:19 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabrice Gasnier X-Patchwork-Id: 10317555 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 5E2EC60467 for ; Fri, 30 Mar 2018 10:04:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4C60B2A572 for ; Fri, 30 Mar 2018 10:04:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3F81C2A584; Fri, 30 Mar 2018 10:04:33 +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=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID 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 AF8002A572 for ; Fri, 30 Mar 2018 10:04:32 +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=twov7l7WFfNOTC 9F+pCJrXGTJLoOegOCU6pNRpmo+A5MqtD04i8HKwTGn4+/bwJwPImLDZcWpudrf61OOV2hMQN8uDV snWbPXiL1x6luzuns17IKVKJ/FHwZIVs1tJzoDd9d3Qh3ilNXcuoWYHeCU3tF4v974cpco2iTit73 lC12/54QWbIe4cWfl3uUS+5Pe0P9Svb7eQdj55/cY7abYLUbVCIUytEZ6oq9gy1c/+Er//cZXISoC 4xE2GRLnp7rKvnpQ4BcqD0jIRylSPoJ/uBLQFACKvcxfdVC3qJgixpOR7ibpxpL3Hy/To/y1pEovD 4KYtiwOqs7ELU6FE1T7g==; 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 1f1qtX-00063s-Jf; Fri, 30 Mar 2018 10:04:27 +0000 Received: from mx08-00178001.pphosted.com ([91.207.212.93] helo=mx07-00178001.pphosted.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1f1qri-00050B-Q2 for linux-arm-kernel@lists.infradead.org; Fri, 30 Mar 2018 10:02:38 +0000 Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx08-.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id w2U9xS5N009278; Fri, 30 Mar 2018 12:01:58 +0200 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx08-00178001.pphosted.com with ESMTP id 2gwcpb8hux-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Fri, 30 Mar 2018 12:01:58 +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 252A731; Fri, 30 Mar 2018 10:01:57 +0000 (GMT) Received: from Webmail-eu.st.com (sfhdag5node3.st.com [10.75.127.15]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id F0D2126B7; Fri, 30 Mar 2018 10:01:56 +0000 (GMT) Received: from localhost (10.75.127.50) by SFHDAG5NODE3.st.com (10.75.127.15) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Fri, 30 Mar 2018 12:01:56 +0200 From: Fabrice Gasnier To: , , Subject: [PATCH v3 1/6] dt-bindings: mfd: stm32-timers: add support for dmas Date: Fri, 30 Mar 2018 12:01:19 +0200 Message-ID: <1522404084-24903-2-git-send-email-fabrice.gasnier@st.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1522404084-24903-1-git-send-email-fabrice.gasnier@st.com> References: <1522404084-24903-1-git-send-email-fabrice.gasnier@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.50] X-ClientProxiedBy: SFHDAG8NODE1.st.com (10.75.127.22) To SFHDAG5NODE3.st.com (10.75.127.15) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2018-03-30_04:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180330_030235_149132_E31B7371 X-CRM114-Status: GOOD ( 10.70 ) 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, benjamin.gaignard@linaro.org, linux-pwm@vger.kernel.org, linux@armlinux.org.uk, linux-kernel@vger.kernel.org, robh+dt@kernel.org, mcoquelin.stm32@gmail.com, fabrice.gasnier@st.com, linux-arm-kernel@lists.infradead.org, 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 Acked-by: Lee Jones --- .../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... + };