From patchwork Tue Jun 3 08:21:31 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris BREZILLON X-Patchwork-Id: 4285961 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 71EE1BEEA7 for ; Tue, 3 Jun 2014 08:24:06 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A06262021B for ; Tue, 3 Jun 2014 08:24:05 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D98442021A for ; Tue, 3 Jun 2014 08:24:04 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Wrjz1-0005Ka-5m; Tue, 03 Jun 2014 08:22:11 +0000 Received: from top.free-electrons.com ([176.31.233.9] helo=mail.free-electrons.com) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Wrjyr-0005D9-F8 for linux-arm-kernel@lists.infradead.org; Tue, 03 Jun 2014 08:22:01 +0000 Received: by mail.free-electrons.com (Postfix, from userid 106) id A67EB7FB; Tue, 3 Jun 2014 10:21:36 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from localhost.localdomain (col31-4-88-188-83-94.fbx.proxad.net [88.188.83.94]) by mail.free-electrons.com (Postfix) with ESMTPSA id DDE2F8AE; Tue, 3 Jun 2014 10:21:35 +0200 (CEST) From: Boris BREZILLON To: Wolfram Sang Subject: [RESEND PATCH v4 1/2] i2c: sunxi: add P2WI DT bindings documentation Date: Tue, 3 Jun 2014 10:21:31 +0200 Message-Id: <1401783692-22358-2-git-send-email-boris.brezillon@free-electrons.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1401783692-22358-1-git-send-email-boris.brezillon@free-electrons.com> References: <1401783692-22358-1-git-send-email-boris.brezillon@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140603_012201_702311_6A829E0F X-CRM114-Status: GOOD ( 12.23 ) X-Spam-Score: 0.3 (/) Cc: devicetree@vger.kernel.org, linux-doc@vger.kernel.org, Greg Kroah-Hartman , Randy Dunlap , linux-kernel@vger.kernel.org, kevin@allwinnertech.com, Hans de Goede , Boris BREZILLON , Shuge , Andrew Morton , Maxime Ripard , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 P2WI (Push/Pull 2 Wire Interface) is an SMBus like bus used to communicate with some PMICs (like the AXP221). Document P2WI DT bindings which are pretty much the same as the one defined for the marvell's mv64xxx controller. Signed-off-by: Boris BREZILLON Acked-by: Maxime Ripard --- .../devicetree/bindings/i2c/i2c-sunxi-p2wi.txt | 41 ++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/i2c/i2c-sunxi-p2wi.txt diff --git a/Documentation/devicetree/bindings/i2c/i2c-sunxi-p2wi.txt b/Documentation/devicetree/bindings/i2c/i2c-sunxi-p2wi.txt new file mode 100644 index 0000000..6b76548 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-sunxi-p2wi.txt @@ -0,0 +1,41 @@ + +* Allwinner P2WI (Push/Pull 2 Wire Interface) controller + +Required properties : + + - reg : Offset and length of the register set for the device. + - compatible : Should one of the following: + - "allwinner,sun6i-a31-p2wi" + - interrupts : The interrupt line connected to the P2WI peripheral. + - clocks : The gate clk connected to the P2WI peripheral. + - resets : The reset line connected to the P2WI peripheral. + +Optional properties : + + - clock-frequency : Desired P2WI bus clock frequency in Hz. If not set the +default frequency is 100kHz + +A P2WI may contain one child node encoding a P2WI slave device. + +Slave device properties: + Required properties: + - reg : the I2C slave address used during the initialization + process to switch from I2C to P2WI mode + +Example: + + p2wi@01f03400 { + compatible = "allwinner,sun6i-a31-p2wi"; + reg = <0x01f03400 0x400>; + interrupts = <0 39 4>; + clocks = <&apb0_gates 3>; + clock-frequency = <6000000>; + resets = <&apb0_rst 3>; + + axp221: pmic@68 { + compatible = "x-powers,axp221"; + reg = <0x68>; + + /* ... */ + }; + };