From patchwork Mon Nov 9 14:14:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amireddy Mallikarjuna reddy X-Patchwork-Id: 11891603 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=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,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 41713C2D0A3 for ; Mon, 9 Nov 2020 14:14:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 106C620867 for ; Mon, 9 Nov 2020 14:14:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730782AbgKIOOg (ORCPT ); Mon, 9 Nov 2020 09:14:36 -0500 Received: from mga01.intel.com ([192.55.52.88]:51663 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730204AbgKIOOg (ORCPT ); Mon, 9 Nov 2020 09:14:36 -0500 IronPort-SDR: F9NhAy30VITp2OG4xHmJuTWljUKBMvBffKeC7nuZGYC+BpIVf6Hkdp9orBnxquX9FHp/+T5Lu1 gzG96c5Csffg== X-IronPort-AV: E=McAfee;i="6000,8403,9799"; a="187758536" X-IronPort-AV: E=Sophos;i="5.77,463,1596524400"; d="scan'208";a="187758536" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Nov 2020 06:14:35 -0800 IronPort-SDR: oVPDxXTl7XKMRwAgHLPDMFqDcDF7oSficSto+ZaxiE83zM4CeJn8Wx+mpbNp56OmvI8kXYS8EE otq2NAYse63A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,463,1596524400"; d="scan'208";a="307996353" Received: from sgsxdev004.isng.intel.com (HELO localhost) ([10.226.88.13]) by fmsmga007.fm.intel.com with ESMTP; 09 Nov 2020 06:14:32 -0800 From: Amireddy Mallikarjuna reddy To: dmaengine@vger.kernel.org, vkoul@kernel.org, devicetree@vger.kernel.org, robh+dt@kernel.org Cc: linux-kernel@vger.kernel.org, andriy.shevchenko@intel.com, chuanhua.lei@linux.intel.com, cheol.yong.kim@intel.com, qi-ming.wu@intel.com, mallikarjunax.reddy@linux.intel.com, malliamireddy009@gmail.com, peter.ujfalusi@ti.com Subject: [PATCH v8 1/2] dt-bindings: dma: Add bindings for intel LGM SOC Date: Mon, 9 Nov 2020 22:14:24 +0800 Message-Id: X-Mailer: git-send-email 2.11.0 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org Add DT bindings YAML schema for DMA controller driver of Lightning Mountain(LGM) SoC. Signed-off-by: Amireddy Mallikarjuna reddy --- v1: - Initial version. v2: - Fix bot errors. v3: - No change. v4: - Address Thomas langer comments - use node name pattern as dma-controller as in common binding. - Remove "_" (underscore) in instance name. - Remove "port-" and "chan-" in attribute name for both 'dma-ports' & 'dma-channels' child nodes. v5: - Moved some of the attributes in 'dma-ports' & 'dma-channels' child nodes to dma client/consumer side as cells in 'dmas' properties. v6: - Add additionalProperties: false - completely removed 'dma-ports' and 'dma-channels' child nodes. - Moved channel dt properties to client side dmas. - Use standard dma-channels and dma-channel-mask properties. - Documented reset-names - Add description for dma-cells v7: - modified compatible to oneof - Reduced number of dma-cells to 3 - Fine tune the description of some properties. v7-resend: - rebase to 5.10-rc1 v8: - rebased to 5.10-rc3 - Fixing the bot issues (wrong indentation) --- .../devicetree/bindings/dma/intel,ldma.yaml | 134 +++++++++++++++++++++ 1 file changed, 134 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/intel,ldma.yaml diff --git a/Documentation/devicetree/bindings/dma/intel,ldma.yaml b/Documentation/devicetree/bindings/dma/intel,ldma.yaml new file mode 100644 index 000000000000..7cf0eab1a703 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/intel,ldma.yaml @@ -0,0 +1,134 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/intel,ldma.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Lightning Mountain centralized low speed DMA and high speed DMA controllers. + +maintainers: + - chuanhua.lei@intel.com + - mallikarjunax.reddy@intel.com + +allOf: + - $ref: "dma-controller.yaml#" + +properties: + $nodename: + pattern: "^dma-controller(@.*)?$" + + compatible: + oneOf: + - const: intel,lgm-cdma + - const: intel,lgm-dma2tx + - const: intel,lgm-dma1rx + - const: intel,lgm-dma1tx + - const: intel,lgm-dma0tx + - const: intel,lgm-dma3 + - const: intel,lgm-toe-dma30 + - const: intel,lgm-toe-dma31 + + reg: + maxItems: 1 + + "#dma-cells": + const: 3 + description: + The first cell is the peripheral's DMA request line. + The second cell is the peripheral's (port) number corresponding to the channel. + The third cell is the burst length of the channel. + + dma-channels: + minimum: 1 + maximum: 16 + + dma-channel-mask: + items: + minItems: 1 + + clocks: + maxItems: 1 + + resets: + maxItems: 1 + + reset-names: + items: + - const: ctrl + + interrupts: + maxItems: 1 + + intel,dma-poll-cnt: + $ref: /schemas/types.yaml#definitions/uint32 + description: + DMA descriptor polling counter is used to control the poling mechanism + for the descriptor fetching for all channels. + + intel,dma-byte-en: + type: boolean + description: + DMA byte enable is only valid for DMA write(RX). + Byte enable(1) means DMA write will be based on the number of dwords + instead of the whole burst. + + intel,dma-drb: + type: boolean + description: + DMA descriptor read back to make sure data and desc synchronization. + + intel,dma-desc-in-sram: + type: boolean + description: + DMA descritpors in SRAM or not. Some old controllers descriptors + can be in DRAM or SRAM. The new ones are all in SRAM. + + intel,dma-orrc: + $ref: /schemas/types.yaml#definitions/uint32 + description: + DMA outstanding read counter value determine the number of + ORR-Outstanding Read Request. The maximum value is 16. + intel,dma-dburst-wr: + type: boolean + description: + Enable RX dynamic burst write. When it is enabled, the DMA does RX dynamic burst; + if it is disabled, the DMA RX will still support programmable fixed burst size of 2,4,8,16. + It only applies to RX DMA and memcopy DMA. + +required: + - compatible + - reg + - '#dma-cells' + +additionalProperties: false + +examples: + - | + dma0: dma-controller@e0e00000 { + compatible = "intel,lgm-cdma"; + reg = <0xe0e00000 0x1000>; + #dma-cells = <3>; + dma-channels = <16>; + dma-channel-mask = <0xFFFF>; + interrupt-parent = <&ioapic1>; + interrupts = <82 1>; + resets = <&rcu0 0x30 0>; + reset-names = "ctrl"; + clocks = <&cgu0 80>; + intel,dma-poll-cnt = <4>; + intel,dma-byte-en; + intel,dma-drb; + }; + - | + dma3: dma-controller@ec800000 { + compatible = "intel,lgm-dma3"; + reg = <0xec800000 0x1000>; + clocks = <&cgu0 71>; + resets = <&rcu0 0x10 9>; + #dma-cells = <3>; + intel,dma-poll-cnt = <16>; + intel,dma-desc-in-sram; + intel,dma-orrc = <16>; + intel,dma-byte-en; + intel,dma-dburst-wr; + };