From patchwork Tue Jun 25 10:44:36 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: sudheer v X-Patchwork-Id: 1121969 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="kUuIF6rH"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 45Y2nK67RHz9sN6 for ; Tue, 25 Jun 2019 20:43:17 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728020AbfFYKnR (ORCPT ); Tue, 25 Jun 2019 06:43:17 -0400 Received: from mail-pl1-f194.google.com ([209.85.214.194]:43404 "EHLO mail-pl1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726576AbfFYKnR (ORCPT ); Tue, 25 Jun 2019 06:43:17 -0400 Received: by mail-pl1-f194.google.com with SMTP id cl9so8611976plb.10; Tue, 25 Jun 2019 03:43:16 -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; bh=rkU+SjzCEWdgQCPJHmPaU3HbLqD9ceb7FSy53eQ0IIE=; b=kUuIF6rHI5NKBa5iWf2twpG18ea8+rZHSY1Kax01fxVPvrvjYf9h+7itV2ANaHaT4S 0wXmGNs1c1XvV5YWxiFZW5J2iynhf+YLlkfLnTN3QQoY5KN3oqXr6/A1Gv/VVY08ZVB2 Y/OSPQMKwzsVXe7KuIbBd6CiXikmUoYcJ35JT1qV1fHn++ZnWK+Yr9ley14eD+aVuD79 DLycYsfIqXwGL+rz1pPWUF+Hgk05kzp+3w8ys2UzNednQ1E0ptHsiIprP9o4zN2aUguG K8GzkUQB7pvVNBp1Hi+eJjU/Qnz3CE+DYOyz82XW/46iAn7D9hYHXJJHM2AGVMynzFpe Zd9Q== 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; bh=rkU+SjzCEWdgQCPJHmPaU3HbLqD9ceb7FSy53eQ0IIE=; b=oESAx17mpGUdkFBliSQgQbriZDSZAe7Iny2MzbGUB41ONxsvSclJxKBH/VKnNBQpX4 R1IQXz96oMdf9tT2oXFPuuUSXGY+ghEhzJisGIETgz/HwG3gtDW/9FQvS3YUx0lEUMd3 LX/8edDw0122As31RdABu0P0nmPf09bWwT/yM9XYG+J7JWkHxSS6cbKIfjCYJZe1fqUO DaAFuMsQX8/3n5ooJu9lte4Vj2kZgiyJYLg1jcWKyqPV1ronhVnPr0wklGO3bJnkvqd+ i7rrnGrqWhyjVqFZhGTJfG3cMl5jYTsraPNRBHBF5OrPRHUoYiCJOqWfBvJ/biTRs0Ds bLUw== X-Gm-Message-State: APjAAAU17tWbbgsLLZl8wSHr3Jzx3NjSmi09Z4a/Gz5wNQD0Jwj/PcKk apC9xu76nm6bbDV/fuMIGDo= X-Google-Smtp-Source: APXvYqzZn/CgQDrn7rDPGw4KYvyAuYwZGm7rkrHHdSrHZZfcaTfeRmErNwWLBQ9WwkiMPzzf74Eh1g== X-Received: by 2002:a17:902:4201:: with SMTP id g1mr45846094pld.300.1561459396428; Tue, 25 Jun 2019 03:43:16 -0700 (PDT) Received: from Pilot130.192.168.0.22 (211-20-114-70.HINET-IP.hinet.net. [211.20.114.70]) by smtp.googlemail.com with ESMTPSA id 14sm22026759pfj.36.2019.06.25.03.43.13 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 25 Jun 2019 03:43:15 -0700 (PDT) From: "sudheer.v" To: gregkh@linuxfoundation.org, jslaby@suse.com, joel@jms.id.au, andrew@aj.id.au, benh@kernel.crashing.org, robh+dt@kernel.org, mark.rutland@arm.com, shivahshankar.shankarnarayanrao@aspeedtech.com, shivahshankar@gmail.com, sudheer.veliseti@aspeedtech.com Cc: sudheer veliseti , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, devicetree@vger.kernel.org, linux-aspeed@lists.ozlabs.org Subject: [patch v3 5/5] Documentation: DT bindings AST2500 DMA UART driver Date: Tue, 25 Jun 2019 16:14:36 +0530 Message-Id: <1561459476-14268-6-git-send-email-open.sudheer@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1561459476-14268-1-git-send-email-open.sudheer@gmail.com> References: <1561459476-14268-1-git-send-email-open.sudheer@gmail.com> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: sudheer veliseti documentation for Dt bindings for DMA based UARTs in AST2500 Signed-off-by: sudheer veliseti --- Changes in v3: - change logs added .../bindings/serial/ast2500-dma-uart.txt | 40 +++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 Documentation/devicetree/bindings/serial/ast2500-dma-uart.txt diff --git a/Documentation/devicetree/bindings/serial/ast2500-dma-uart.txt b/Documentation/devicetree/bindings/serial/ast2500-dma-uart.txt new file mode 100644 index 000000000000..6f01ddecba56 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/ast2500-dma-uart.txt @@ -0,0 +1,40 @@ + +node for DMA controller: + ast_uart_sdma: uart_sdma@1e79e000 { + compatible = "aspeed,ast-uart-sdma"; + reg = <0x1e79e000 0x400>; + interrupts = <50>; + status = "disabled"; + }; +this node doesn't binds with any driver. +DMA controller is handled as a separate SW layer,and is included in the same driver. +This DMA controller node is included in DT just for Register base and interrupt details + + + +node for DMA-UART : + + +Required properties: + +- compatible: "aspeed,ast-sdma-uart" +- reg: The base address of the UART register bank +- interrupts: should contain interrupt specifier. +- clocks: Clock driving the hardware; +- pinctrl-0 : list of pinconfigurations +- dma-channel: channel of DMA-controller which is used + +Example: + + dma_uart1: dma_uart1@1e783000{ + compatible = "aspeed,ast-sdma-uart"; + reg = <0x1e783000 0x1000>; + reg-shift = <2>; + interrupts = <9>; + clocks = <&syscon ASPEED_CLK_GATE_UART1CLK>; + dma-channel = <0>; + no-loopback-test; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_txd1_default &pinctrl_rxd1_default>; + status = "disabled"; + };