From patchwork Thu Jul 17 16:45:27 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Murphy X-Patchwork-Id: 4577521 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id C6ADB9F1D6 for ; Thu, 17 Jul 2014 16:48:08 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E0666201BB for ; Thu, 17 Jul 2014 16:48:07 +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 04C5B20120 for ; Thu, 17 Jul 2014 16:48:07 +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 1X7opG-0001Wx-Jf; Thu, 17 Jul 2014 16:46:34 +0000 Received: from comal.ext.ti.com ([198.47.26.152]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1X7ooh-0001Ae-9f for linux-arm-kernel@lists.infradead.org; Thu, 17 Jul 2014 16:46:00 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id s6HGjYo3013309; Thu, 17 Jul 2014 11:45:34 -0500 Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id s6HGjYwr015405; Thu, 17 Jul 2014 11:45:34 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.3.174.1; Thu, 17 Jul 2014 11:45:34 -0500 Received: from legion.dal.design.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id s6HGjY79023824; Thu, 17 Jul 2014 11:45:34 -0500 Received: from localhost (j-172-22-151-213.vpn.ti.com [172.22.151.213]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id s6HGjYt19593; Thu, 17 Jul 2014 11:45:34 -0500 (CDT) From: Dan Murphy To: , , Subject: [v3 PATCH 2/6] dt: TI: Describe the ti reset DT entries Date: Thu, 17 Jul 2014 11:45:27 -0500 Message-ID: <1405615531-15649-2-git-send-email-dmurphy@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1405615531-15649-1-git-send-email-dmurphy@ti.com> References: <1405615531-15649-1-git-send-email-dmurphy@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140717_094559_454482_2BA63D3C X-CRM114-Status: GOOD ( 12.11 ) X-Spam-Score: -5.0 (-----) Cc: tony@atomide.com, Dan Murphy X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Describe the TI reset DT entries for TI SoC's. Signed-off-by: Dan Murphy --- v3 - Changed Headline no other changes .../devicetree/bindings/reset/ti,reset.txt | 103 ++++++++++++++++++++ 1 file changed, 103 insertions(+) create mode 100644 Documentation/devicetree/bindings/reset/ti,reset.txt diff --git a/Documentation/devicetree/bindings/reset/ti,reset.txt b/Documentation/devicetree/bindings/reset/ti,reset.txt new file mode 100644 index 0000000..9d5c29c --- /dev/null +++ b/Documentation/devicetree/bindings/reset/ti,reset.txt @@ -0,0 +1,103 @@ +Texas Instruments Reset Controller +====================================== +Please also refer to reset.txt in this directory for common reset +controller binding usage. + +Specifying the reset entries for the IP module +============================================== +Parent module: +This is the module node that contains the reset registers and bits. + +example: + prcm_resets: resets { + compatible = "ti,dra7-resets"; + #reset-cells = <1>; + }; + +Required parent properties: +- compatible : Should be one of, + "ti,omap4-prm" for OMAP4 PRM instances + "ti,omap5-prm" for OMAP5 PRM instances + "ti,dra7-prm" for DRA7xx PRM instances + "ti,am4-prcm" for AM43xx PRCM instances + "ti,am3-prcm" for AM33xx PRCM instances + +Required child reset property: +- compatible : Should be + "resets" for All TI SoCs + +example: + prm: prm@4ae06000 { + compatible = "ti,omap5-prm"; + reg = <0x4ae06000 0x3000>; + + prm_resets: resets { + #address-cells = <1>; + #size-cells = <1>; + #reset-cells = <1>; + }; + }; + + +Reset node declaration +============================================== +The reset node is declared in a parent child relationship. The main parent +is the PRCM module which contains the base address. The first child within +the reset parent declares the target modules reset name. This is followed by +the control and status offsets. + +Within the first reset child node is a secondary child node which declares the +reset signal of interest. Under this node the control and status bits +are declared. These bits declare the bit mask for the target reset. + + +Required properties: +reg - This is the register offset from the PRCM parent. + This must be declared as: + + reg = , + ; + +control-bit - This is the bit within the register which controls the reset + of the target module. This is declared as a bit mask for the register. +status-bit - This is the bit within the register which contains the status of + the reset of the target module. + This is declared as a bit mask for the register. + +example: +&prm_resets { + dsp_rstctrl { + reg = <0x1c00>, + <0x1c04>; + + dsp_reset: dsp_reset { + control-bit = <0x01>; + status-bit = <0x01>; + }; + }; +}; + + + +Client Node Declaration +============================================== +This is the consumer of the parent node to declare what resets this +particular module is interested in. + +example: + src: src@55082000 { + resets = <&reset_src phandle>; + reset-names = ""; + }; + +Required Properties: +reset_src - This is the parent DT entry for the reset controller +phandle - This is the phandle of the specific reset to be used by the clien + driver. +reset-names - This is the reset name of module that the device driver + needs to be able to reset. This value must correspond to a value within + the reset controller array. + +example: +resets = <&prm_resets &dsp_mmu_reset>; +reset-names = "dsp_mmu_reset";