From patchwork Fri Jun 9 22:39:35 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joshua Clayton X-Patchwork-Id: 9779499 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 AA2EF60352 for ; Fri, 9 Jun 2017 22:40:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9BC75286C1 for ; Fri, 9 Jun 2017 22:40:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 90A98286C4; Fri, 9 Jun 2017 22:40:28 +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_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FROM autolearn=ham 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 1FA4B286D3 for ; Fri, 9 Jun 2017 22:40:28 +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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=eRLNcQaLTIAb8mYxhBpm1kADiyiYmRDJ6B9mUlwvWfU=; b=eqJLMqiCpz4+RsX7u7uk9pM38m hSRG5/cgKD2xgYwMu54QvCbXEEba3t1QBmU1YhyThQtsRqp2UI5m4oq67Gza5XMLrVct60/1SLLqN sc+Zd0bvP/DEnI+YZtDm1JNSt1vOqKCSrXv6q18TFZ5spqoLXZqGTFIQL0MNQBPWs+s7ALAHEQKWS WKOl42EJ32kjy7SHjMeJLhW+ycSOuwxOelpDDMi3X/lW/779L7lFzyg0hbgXgWqZYDxqAshB1S0oL ZUotyZ+waaBwodXZrn++RJwdX+dKQUN4toxCGXzkyh8vpUgFXcfeOS6WgB2PeY9s9dyV2PbYySEm3 pLEv/0bg==; 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 1dJSZv-0001yg-8e; Fri, 09 Jun 2017 22:40:27 +0000 Received: from mail-pg0-x243.google.com ([2607:f8b0:400e:c05::243]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dJSZg-0000Vf-Np for linux-arm-kernel@lists.infradead.org; Fri, 09 Jun 2017 22:40:14 +0000 Received: by mail-pg0-x243.google.com with SMTP id a70so8802364pge.0 for ; Fri, 09 Jun 2017 15:39:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=OP2rSAg5Qr1rhlZll0Exytk2+XGEQYEXRCQ2Bb5FMHY=; b=SickKWcH5yWZomcHcK1dV9XW1aWA6UG6zK2w1TcIJ+GVc3SdOVZvLW8hEWsbpIujh6 OBW61N/qJebIXvog691i68Np21U+80+P7X3ZbvS1s4TDE7ODrkhvH1DFdUkhqlhQ8mxN uMgULCadMQ01t1rv93ocTx38ksq5UcA3mQl6UWBdKBTq5QbSRK4OoydrYv97UuDqD+Jl 08kTAgaiUrUKlqR051ozHTI7KkokCWMp+nSv8R9eSZhqz64OZjeJ3ujd/ovcZYCYdy+z lNsVgndO2lkPL6p2WHEj+z/fqDd2LJA++kSzxF6H1hzTfS2GShlIV9P96DB13twwalFj cUIA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=OP2rSAg5Qr1rhlZll0Exytk2+XGEQYEXRCQ2Bb5FMHY=; b=PG8h5CM+d5yN1BKYlDp0cvlidlP0FgDoASPR8Ou6PmythW7W4onBSn+uXPCDfBIY5S BerQb/2clccdKWocrpK/t4kY+eZ+GDpLC4tAzcnC8DoNp/K3R4Z/f5ies63uVUV2PKiE BNitdpWUf3xyRt0LoiPp3qQp/RqT6hxCeI7FrwY0ozgGdil0W8x/R+t146m5JMVICSq5 +FDB+sxHUfcy7qpJt7SpWbHFFS48crNi791ZAL/1dCbCt84IYOUSW7mmtOBkJuzWsv7W xJrhzpzSCmNSjap9AKZekmwY/Tpf2M5qm0AeP9XNtJu5DA+rN9NuWV5u0fUysagyg0qI 885g== X-Gm-Message-State: AODbwcDayO5CTKOGvSr6ot29+BjJ8X5sBV4ZvHgmF4GqVEGZ3LPBzSMe Bc2RcELmZUSGlA== X-Received: by 10.99.141.200 with SMTP id z191mr33313755pgd.99.1497047992020; Fri, 09 Jun 2017 15:39:52 -0700 (PDT) Received: from localhost.localdomain (68-185-59-186.static.knwc.wa.charter.com. [68.185.59.186]) by smtp.gmail.com with ESMTPSA id s4sm4771804pgr.10.2017.06.09.15.39.49 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 09 Jun 2017 15:39:51 -0700 (PDT) From: Joshua Clayton To: Alan Tull , Moritz Fischer , Anatolij Gustschin , Bastian Stender , Shawn Guo , Joshua Clayton Subject: [PATCH v13 2/6] doc: dt: document altera-passive-serial binding Date: Fri, 9 Jun 2017 15:39:35 -0700 Message-Id: <239fb9ad4848c96ddc944f99db811721653da95b.1497047816.git.stillcompiling@gmail.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <03e591707dc72f4c2b5e63a1272060956294ea51.1497047816.git.stillcompiling@gmail.com> References: <03e591707dc72f4c2b5e63a1272060956294ea51.1497047816.git.stillcompiling@gmail.com> In-Reply-To: <03e591707dc72f4c2b5e63a1272060956294ea51.1497047816.git.stillcompiling@gmail.com> References: <03e591707dc72f4c2b5e63a1272060956294ea51.1497047816.git.stillcompiling@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170609_154012_798065_73F9813C X-CRM114-Status: GOOD ( 12.82 ) 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 , devicetree@vger.kernel.org, linux-fpga@vger.kernel.org, Russell King , linux-kernel@vger.kernel.org, Rob Herring , Sascha Hauer , Fabio Estevam , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 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 Describe an altera-passive-serial devicetree entry, required features Signed-off-by: Joshua Clayton Acked-by: Rob Herring --- .../bindings/fpga/altera-passive-serial.txt | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 Documentation/devicetree/bindings/fpga/altera-passive-serial.txt diff --git a/Documentation/devicetree/bindings/fpga/altera-passive-serial.txt b/Documentation/devicetree/bindings/fpga/altera-passive-serial.txt new file mode 100644 index 000000000000..48478bc07e29 --- /dev/null +++ b/Documentation/devicetree/bindings/fpga/altera-passive-serial.txt @@ -0,0 +1,29 @@ +Altera Passive Serial SPI FPGA Manager + +Altera FPGAs support a method of loading the bitstream over what is +referred to as "passive serial". +The passive serial link is not technically SPI, and might require extra +circuits in order to play nicely with other SPI slaves on the same bus. + +See https://www.altera.com/literature/hb/cyc/cyc_c51013.pdf + +Required properties: +- compatible: Must be one of the following: + "altr,fpga-passive-serial", + "altr,fpga-arria10-passive-serial" +- reg: SPI chip select of the FPGA +- nconfig-gpios: config pin (referred to as nCONFIG in the manual) +- nstat-gpios: status pin (referred to as nSTATUS in the manual) + +Optional properties: +- confd-gpios: confd pin (referred to as CONF_DONE in the manual) + +Example: + fpga: fpga@0 { + compatible = "altr,fpga-passive-serial"; + spi-max-frequency = <20000000>; + reg = <0>; + nconfig-gpios = <&gpio4 9 GPIO_ACTIVE_LOW>; + nstat-gpios = <&gpio4 11 GPIO_ACTIVE_LOW>; + confd-gpios = <&gpio4 12 GPIO_ACTIVE_LOW>; + };