From patchwork Wed Jun 21 14:32:05 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 9802067 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 350F9600C5 for ; Wed, 21 Jun 2017 14:47:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 25E5428578 for ; Wed, 21 Jun 2017 14:47:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1A6322858E; Wed, 21 Jun 2017 14:47:19 +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=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 5584E28578 for ; Wed, 21 Jun 2017 14:47:18 +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=7nrDXEv6U3TD/FV3bOWyaa4bMADRopu6SOxINy+XCKc=; b=aloz7/vVqvnyR4 SLYkrPqHzQvNsCosXxZ1u467p+Dld4C8CVfZVMQQchPNmthJHTZscJnlfuKwPB+7KkuxEqIwVCh5o yrfSEqiCFSiH6uinIv+BZNJ/u2AIW1lDuHYgctm6WMK6vASsypq4njYEjwlDdE+ggqrBl82kN4dLv B0qJRiuQNSnk4PIaQCis8vsbB2Qq/OuVWtRqAqg2q3ar2W59qsxUWOV+YMeyppgXYsgpFJQ+AMR+B tnQPlIbQWBDUCBHnEDE9c03tnXd08atS02a3ArMyLKdll6GEKhJa01sY4QRMwoCbUna2iMLn5/8au nOEoziTbSVd/SeRA+maQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dNgub-0007Bm-G7; Wed, 21 Jun 2017 14:47:17 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dNguZ-0006yW-AT for linux-arm-kernel@bombadil.infradead.org; Wed, 21 Jun 2017 14:47:15 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:CC:To:From:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=f3jC/jhhVxau+QBuvYyrqP1B3855xmkno45sSruFSZw=; b=wIiGkzzlU9nqQT4Ui9Ieu7jLr 52lsDj88ZktiZ8YGdv1gnSmlobFJyoTssGJ6YYUU7gIUVIcvSALUJLOTTnxsB6DueVABmk6NDk86a K45czx38Yj+c7TIfeYFjFI7x3r95gJ+mnbH4BeidEqPqFHFgs1lS6BQEC6FIZSHgvR7dDN+h3DVNT ITwBAEFWRIqfb0UaOwSWEgy+8oIeWgw3WNEMs2OMJmGoUcnTxjl/s+JECzrYKQ7cdRRo1e65n+x/v yjND05KzQ1u62L8NtePfxZq5hkwQIOpcb1bEHow5BInmsOAj+xKbGwSseGukSoCK581XkTtkCcFRh spOvY4Nqg==; Received: from mx08-00178001.pphosted.com ([91.207.212.93] helo=mx07-00178001.pphosted.com) by casper.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dNggb-0000QQ-K4 for linux-arm-kernel@lists.infradead.org; Wed, 21 Jun 2017 14:32:57 +0000 Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx08-.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v5LEVCmd019541; Wed, 21 Jun 2017 16:32:22 +0200 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx08-.pphosted.com with ESMTP id 2b7ket38bb-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Wed, 21 Jun 2017 16:32:22 +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 7E54434; Wed, 21 Jun 2017 14:32:21 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas21.st.com [10.75.90.44]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 6402425A0; Wed, 21 Jun 2017 14:32:21 +0000 (GMT) Received: from localhost (10.201.23.160) by Webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.339.0; Wed, 21 Jun 2017 16:32:21 +0200 From: Amelie Delaunay To: Mark Brown , Rob Herring , Mark Rutland , Maxime Coquelin , Alexandre Torgue Subject: [PATCH 1/2] dt-bindings: spi: Document the STM32 SPI bindings Date: Wed, 21 Jun 2017 16:32:05 +0200 Message-ID: <1498055526-6918-2-git-send-email-amelie.delaunay@st.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1498055526-6918-1-git-send-email-amelie.delaunay@st.com> References: <1498055526-6918-1-git-send-email-amelie.delaunay@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.23.160] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-06-21_03:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170621_153249_811594_70BB9D4F X-CRM114-Status: GOOD ( 17.15 ) 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: devicetree@vger.kernel.org, Amelie Delaunay , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-spi@vger.kernel.org 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 This patch adds the documentation of device tree bindings for the STM32 SPI controller. Signed-off-by: Amelie Delaunay --- .../devicetree/bindings/spi/spi-stm32.txt | 60 ++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/spi-stm32.txt diff --git a/Documentation/devicetree/bindings/spi/spi-stm32.txt b/Documentation/devicetree/bindings/spi/spi-stm32.txt new file mode 100644 index 0000000..3958bf6 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/spi-stm32.txt @@ -0,0 +1,60 @@ +STMicroelectronics STM32 SPI Controller + +The STM32 SPI controller is used to communicate with external devices using +the Serial Peripheral Interface. It supports full-duplex, half-duplex and +simplex synchronous serial communication with external devices. It supports +from 4 to 32-bit data size. Although it can be configured as master or slave, +only master is supported by the driver. + +Required properties: +- compatible: Must be "st,stm32-spi". +- reg: Offset and length of the device's register set. +- interrupts: Must contain the interrupt id. +- clocks: Must contain an entry for spiclk (which feeds the internal clock + generator). +- #address-cells: Number of cells required to define a chip select address. +- #size-cells: Should be zero. + +Optional properties: +- resets: Must contain the phandle to the reset controller. +- A pinctrl state named "default" may be defined to set pins in mode of + operation for SPI transfer. +- dmas: DMA specifiers for tx and rx dma. DMA fifo mode must be used. See the + STM32 DMA bindings, Documentation/devicetree/bindings/dma/stm32-dma.txt. +- dma-names: DMA request names should include "tx" and "rx" if present. +- cs-gpios: list of GPIO chip selects. See the SPI bus bindings, + Documentation/devicetree/bindings/spi/spi-bus.txt + + +Child nodes represent devices on the SPI bus + See ../spi/spi-bus.txt + +Optional properties: +- st,spi-midi-ns: (Master Inter-Data Idleness) minimum time delay in + nanoseconds inserted between two consecutive data frames. + + +Example: + spi2: spi@40003800 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "st,stm32-spi"; + reg = <0x40003800 0x400>; + interrupts = <36>; + clocks = <&rcc SPI2_CK>; + resets = <&rcc 1166>; + dmas = <&dmamux1 0 39 0x400 0x01>, + <&dmamux1 1 40 0x400 0x01>; + dma-names = "rx", "tx"; + pinctrl-0 = <&spi2_pins_b>; + pinctrl-names = "default"; + status = "okay"; + cs-gpios = <&gpioa 11 0>; + + spidev@0 { + compatible = "spidev"; + reg = <0>; + spi-max-frequency = <4000000>; + st,spi-midi = <4000>; + }; + };