From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6AD67C43387 for ; Thu, 10 Jan 2019 17:59:31 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 3B3852064C for ; Thu, 10 Jan 2019 17:59:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="gUJhVNuJ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3B3852064C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=v3.sk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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=qlw+80rBigqVJfRBYezjwsSm9Of7dH49pA3A8tosjK4=; b=gUJhVNuJNglKUK nKKpcgnSTCGJ8vpvHFAMcVwxj22XAJ3w566Kaagzte+9AxHfMOnav0PsaiqowRgz12l8ejqXDoiUN 4MgI5mx+Z5SEcwDU5YZFYz0GV1qMC0FYFqnELYoO4b7SDmleZMsMDn06k4/2eRTrZnYTUGhLDcA4o pfinvQl3m4jFv7hxWDH95yRO7S2/yPcEC/gefQZcRHKu7P5ANFaC4aNxq2YKhUQyt1jMJphsAjCKz b0fmry4EIcZg+9kPBZG/LTI+EZxgpGH+K8mDt/GolLzqEXQyJ8QtHBJcYUkcLDSoiWsuQEbrimiNd a/mGik44mBdPXmtluKyw==; 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 1ghec3-00017i-Uu; Thu, 10 Jan 2019 17:59:27 +0000 Received: from shell.v3.sk ([90.176.6.54]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1ghebk-0000rh-Rs for linux-arm-kernel@lists.infradead.org; Thu, 10 Jan 2019 17:59:10 +0000 Received: from localhost (localhost [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id E1D241002F7; Thu, 10 Jan 2019 18:59:04 +0100 (CET) Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id PzyG_0JlMs-I; Thu, 10 Jan 2019 18:58:56 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id 3FF2E1002FB; Thu, 10 Jan 2019 18:58:55 +0100 (CET) X-Virus-Scanned: amavisd-new at zimbra.v3.sk Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id MA-jPCPI_amu; Thu, 10 Jan 2019 18:58:53 +0100 (CET) Received: from belphegor.brq.redhat.com (nat-pool-brq-t.redhat.com [213.175.37.10]) by zimbra.v3.sk (Postfix) with ESMTPSA id 2E5921002F1; Thu, 10 Jan 2019 18:58:53 +0100 (CET) From: Lubomir Rintel To: Andy Shevchenko , Darren Hart Subject: [PATCH v5 01/10] dt-bindings: olpc, xo1.75-ec: Add OLPC XO-1.75 EC bindings Date: Thu, 10 Jan 2019 18:58:36 +0100 Message-Id: <20190110175845.1203986-2-lkundrak@v3.sk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190110175845.1203986-1-lkundrak@v3.sk> References: <20190110175845.1203986-1-lkundrak@v3.sk> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190110_095909_058097_37F372A4 X-CRM114-Status: UNSURE ( 9.98 ) X-CRM114-Notice: Please train this message. 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-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Russell King , platform-driver-x86@vger.kernel.org, Lubomir Rintel , Rob Herring , Pavel Machek , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org The OLPC XO-1.75 Embedded Controller is a SPI master that uses extra signals for handshaking. It needs to know when is the slave (Linux) side's TX FIFO ready for transfer (the ready-gpio signal on the SPI controller node) and when does it wish to respond with a command (the cmd-gpio property). Signed-off-by: Lubomir Rintel Acked-by: Pavel Machek --- Changes since v1: - s/cmd-gpio/cmd-gpios/ - s/ready-gpio/ready-gpios/ in the documentation paragraph - Remove status = "okay" from the example .../bindings/misc/olpc,xo1.75-ec.txt | 23 +++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 Documentation/devicetree/bindings/misc/olpc,xo1.75-ec.txt diff --git a/Documentation/devicetree/bindings/misc/olpc,xo1.75-ec.txt b/Documentation/devicetree/bindings/misc/olpc,xo1.75-ec.txt new file mode 100644 index 000000000000..8c4d649cdd8f --- /dev/null +++ b/Documentation/devicetree/bindings/misc/olpc,xo1.75-ec.txt @@ -0,0 +1,23 @@ +OLPC XO-1.75 Embedded Controller + +Required properties: +- compatible: Should be "olpc,xo1.75-ec". +- cmd-gpios: gpio specifier of the CMD pin + +The embedded controller requires the SPI controller driver to signal readiness +to receive a transfer (that is, when TX FIFO contains the response data) by +strobing the ACK pin with the ready signal. See the "ready-gpios" property of the +SSP binding as documented in: +. + +Example: + &ssp3 { + spi-slave; + ready-gpios = <&gpio 125 GPIO_ACTIVE_HIGH>; + + slave { + compatible = "olpc,xo1.75-ec"; + spi-cpha; + cmd-gpios = <&gpio 155 GPIO_ACTIVE_HIGH>; + }; + }; -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel