From patchwork Tue Jun 13 23:45:11 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suman Anna X-Patchwork-Id: 9784995 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 C532060244 for ; Tue, 13 Jun 2017 23:48:45 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B342D26E98 for ; Tue, 13 Jun 2017 23:48:45 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A6401284D2; Tue, 13 Jun 2017 23:48:45 +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=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 7E62926E98 for ; Tue, 13 Jun 2017 23:48:44 +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=8LfS///M/rpcjz3jc5SjBOSQrSPwhA3ketOp6uAOpjM=; b=ENRNdch0RWuJk3 W2kecOLuM2e/v7+mPhfml7l288LydXsHvp8D+DUTsHyLLLLgYvel0nS4UK9LYYhS+xPrXrmUd+Bm0 sjVpsoH/OoR9Xw3o7hkLp//zCKd4mK+lI2Cd3zjAAzoFdcBmLLqm/R2NKK3k2XvAzeFLhvoqbeQzw 9/iaujjvpdNlA+7MAZ6QxbEcdzDfcquDd5Kie5c+X9lXvm/QhstsEGUBmEgZLxxd8GkvNtsZvmy+h 0OqE4wMF2n9CD4AvEjI+L0gfVzvSclhyhAr2Xn1ISyaTrQT1s8/KTA4/SiHspk/5VDdD9doMpNWV4 OwwMhQOeOxDyJtBkZFBw==; 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 1dKvY5-0006w4-Vv; Tue, 13 Jun 2017 23:48:38 +0000 Received: from lelnx193.ext.ti.com ([198.47.27.77]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dKvVH-0005sn-7F for linux-arm-kernel@lists.infradead.org; Tue, 13 Jun 2017 23:45:47 +0000 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by lelnx193.ext.ti.com (8.15.1/8.15.1) with ESMTP id v5DNjFST012832; Tue, 13 Jun 2017 18:45:15 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ti.com; s=ti-com-17Q1; t=1497397515; bh=2f6uoP+VLTHxbr33qoWKy8JLoLOtOCXXBGLdZAkF1iU=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=m8/zGOE9WPrrbyXdFlT5leqo+1XR/4EWcuxH8y9UqGTaVTd9mfGA52EwP7rpW+KgC mvgYEBsw0fquhpflQBKsUJ2HHaybDbR+sCTD2MejfqBzLZRVcqzg4Ig/Trwq9E/SBO H/YiX2mhM37WNen8VN6+2Nqvr6wIpQiIlzDZDa6w= Received: from DLEE70.ent.ti.com (dlemailx.itg.ti.com [157.170.170.113]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id v5DNjFHO001198; Tue, 13 Jun 2017 18:45:15 -0500 Received: from dlep32.itg.ti.com (157.170.170.100) by DLEE70.ent.ti.com (157.170.170.113) with Microsoft SMTP Server id 14.3.294.0; Tue, 13 Jun 2017 18:45:14 -0500 Received: from legion.dal.design.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id v5DNjEBP002441; Tue, 13 Jun 2017 18:45:14 -0500 Received: from localhost (irmo.dhcp.ti.com [128.247.58.153]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id v5DNjE323321; Tue, 13 Jun 2017 18:45:14 -0500 (CDT) From: Suman Anna To: Bjorn Andersson , Ohad Ben-Cohen Subject: [PATCH v3 1/3] dt-bindings: remoteproc: Add Keystone DSP remoteproc binding Date: Tue, 13 Jun 2017 18:45:11 -0500 Message-ID: <20170613234513.7624-2-s-anna@ti.com> X-Mailer: git-send-email 2.13.1 In-Reply-To: <20170613234513.7624-1-s-anna@ti.com> References: <20170613234513.7624-1-s-anna@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170613_164543_491368_E0D53187 X-CRM114-Status: GOOD ( 14.84 ) 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-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, "Andrew F. Davis" , Rob Herring , Santosh Shilimkar , linux-arm-kernel@lists.infradead.org, Sam Nelson 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 Add the device tree bindings document for the Texas Instrument's Keystone 2 DSP remoteproc devices. Signed-off-by: Suman Anna Signed-off-by: Sam Nelson Acked-by: Rob Herring Acked-by: Santosh Shilimkar --- v3: - Picked up the Acks from Rob and Santosh, and addressed the one minor comment from Rob - removing the label property usage from example v2: https://patchwork.kernel.org/patch/9773681/ .../bindings/remoteproc/ti,keystone-rproc.txt | 133 +++++++++++++++++++++ 1 file changed, 133 insertions(+) create mode 100644 Documentation/devicetree/bindings/remoteproc/ti,keystone-rproc.txt diff --git a/Documentation/devicetree/bindings/remoteproc/ti,keystone-rproc.txt b/Documentation/devicetree/bindings/remoteproc/ti,keystone-rproc.txt new file mode 100644 index 000000000000..2aac1aa4123d --- /dev/null +++ b/Documentation/devicetree/bindings/remoteproc/ti,keystone-rproc.txt @@ -0,0 +1,133 @@ +TI Keystone DSP devices +======================= + +The TI Keystone 2 family of SoCs usually have one or more (upto 8) TI DSP Core +sub-systems that are used to offload some of the processor-intensive tasks or +algorithms, for achieving various system level goals. + +These processor sub-systems usually contain additional sub-modules like L1 +and/or L2 caches/SRAMs, an Interrupt Controller, an external memory controller, +a dedicated local power/sleep controller etc. The DSP processor core in +Keystone 2 SoCs is usually a TMS320C66x CorePac processor. + +DSP Device Node: +================ +Each DSP Core sub-system is represented as a single DT node, and should also +have an alias with the stem 'rproc' defined. Each node has a number of required +or optional properties that enable the OS running on the host processor (ARM +CorePac) to perform the device management of the remote processor and to +communicate with the remote processor. + +Required properties: +-------------------- +The following are the mandatory properties: + +- compatible: Should be one of the following, + "ti,k2hk-dsp" for DSPs on Keystone 2 66AK2H/K SoCs + "ti,k2l-dsp" for DSPs on Keystone 2 66AK2L SoCs + "ti,k2e-dsp" for DSPs on Keystone 2 66AK2E SoCs + +- reg: Should contain an entry for each value in 'reg-names'. + Each entry should have the memory region's start address + and the size of the region, the representation matching + the parent node's '#address-cells' and '#size-cells' values. + +- reg-names: Should contain strings with the following names, each + representing a specific internal memory region, and + should be defined in this order, + "l2sram", "l1pram", "l1dram" + +- clocks: Should contain the device's input clock, and should be + defined as per the bindings in, + Documentation/devicetree/bindings/clock/keystone-gate.txt + +- ti,syscon-dev: Should be a pair of the phandle to the Keystone Device + State Control node, and the register offset of the DSP + boot address register within that node's address space. + +- resets: Should contain the phandle to the reset controller node + managing the resets for this device, and a reset + specifier. Please refer to the following reset bindings + for the reset argument specifier as per SoC, + Documentation/devicetree/bindings/reset/ti-syscon-reset.txt + for 66AK2HK/66AK2L/66AK2E SoCs + +- interrupt-parent: Should contain a phandle to the Keystone 2 IRQ controller + IP node that is used by the ARM CorePac processor to + receive interrupts from the DSP remote processors. See + Documentation/devicetree/bindings/interrupt-controller/ti,keystone-irq.txt + for details. + +- interrupts: Should contain an entry for each value in 'interrupt-names'. + Each entry should have the interrupt source number used by + the remote processor to the host processor. The values should + follow the interrupt-specifier format as dictated by the + 'interrupt-parent' node. The purpose of each is as per the + description in the 'interrupt-names' property. + +- interrupt-names: Should contain strings with the following names, each + representing a specific interrupt, + "vring" - interrupt for virtio based IPC + "exception" - interrupt for exception notification + +- kick-gpios: Should specify the gpio device needed for the virtio IPC + stack. This will be used to interrupt the remote processor. + The gpio device to be used is as per the bindings in, + Documentation/devicetree/bindings/gpio/gpio-dsp-keystone.txt + +Optional properties: +-------------------- + +- memory-region: phandle to the reserved memory node to be associated + with the remoteproc device. The reserved memory node + can be a CMA memory node, and should be defined as + per the bindings in + Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt + + +Example: +-------- + /* 66AK2H/K DSP aliases */ + aliases { + rproc0 = &dsp0; + rproc1 = &dsp1; + rproc2 = &dsp2; + rproc3 = &dsp3; + rproc4 = &dsp4; + rproc5 = &dsp5; + rproc6 = &dsp6; + rproc7 = &dsp7; + }; + + /* 66AK2H/K DSP memory node */ + reserved-memory { + #address-cells = <2>; + #size-cells = <2>; + ranges; + + dsp_common_memory: dsp-common-memory@81f800000 { + compatible = "shared-dma-pool"; + reg = <0x00000008 0x1f800000 0x00000000 0x800000>; + reusable; + }; + }; + + /* 66AK2H/K DSP node */ + soc { + dsp0: dsp@10800000 { + compatible = "ti,k2hk-dsp"; + reg = <0x10800000 0x00100000>, + <0x10e00000 0x00008000>, + <0x10f00000 0x00008000>; + reg-names = "l2sram", "l1pram", "l1dram"; + clocks = <&clkgem0>; + ti,syscon-dev = <&devctrl 0x40>; + resets = <&pscrst 0>; + interrupt-parent = <&kirq0>; + interrupts = <0 8>; + interrupt-names = "vring", "exception"; + kick-gpios = <&dspgpio0 27 0>; + memory-region = <&dsp_common_memory>; + }; + + };