From patchwork Wed Aug 25 06:59:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunyan Zhang X-Patchwork-Id: 502658 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 38D61C4320E for ; Wed, 25 Aug 2021 07:00:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1E256611AF for ; Wed, 25 Aug 2021 07:00:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238577AbhHYHAp (ORCPT ); Wed, 25 Aug 2021 03:00:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49246 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239005AbhHYHAf (ORCPT ); Wed, 25 Aug 2021 03:00:35 -0400 Received: from mail-pg1-x52d.google.com (mail-pg1-x52d.google.com [IPv6:2607:f8b0:4864:20::52d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E7A9AC0617A8; Tue, 24 Aug 2021 23:59:49 -0700 (PDT) Received: by mail-pg1-x52d.google.com with SMTP id q68so5050798pga.9; Tue, 24 Aug 2021 23:59:49 -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 :mime-version:content-transfer-encoding; bh=wx0yGr9IjZZHkEynSx/gWkIpnCWkf8kx83N5GfWTTY0=; b=KHdnGb81B/eJT9AZ/cAk6tzbFkQfo9l6/ivx1IPpak2o0vkQkAYD6ivn/PmdZ5fsGW peelf6Hz+LWag9LKEdjHudQwErvWA7WDa5P7NTfVMzAwu95V5sGR3KZ9gS2kHjO/3CsX Og/2l3pYlybki1imXLGE3SC0j24hs0ZTEF2r+b5n7weMLed0CRkb578PtT9BcP8XEeS2 b4++PTQb/kvAJE05MxNzzBgdJihFnSnCWvmpHW6Z5NbM9cHq0XEY8wuXe9I4VJY1Xn+X 8LzjDhPMb3Xssk7Mbx9ka8/iFuYwuU0PvFPaiBUE6BMrZNizT3iD9jBqyH7OzrpqzgzN aAjw== 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:mime-version:content-transfer-encoding; bh=wx0yGr9IjZZHkEynSx/gWkIpnCWkf8kx83N5GfWTTY0=; b=b3l5mBXqLSLxfRTUJmW8NMLVgb8Av09q9pGpgv/6ObSeGj1z/lDTT6/mi9xpvh8mvl 96wvwQwVJ7s9JBfo7lcGeiuHgcqbZmwx+Q7/iOPpslZkoXnu45fkIOPfbSvm72zsCzmq lELiWtFgAKIMShIHrjGnfR3TrwCnaWF4iifUZRat7WVSz6fQl0eyFkNWk82VZRblJ3cr 2alv4RgZLTyz/ZkPo1BH6C0wFSMov4/gV1U7p1zJcViRWZmjGqZO00aCjDw6c2t9jIIa ZVPiHOThdmrJs7W70C8jQbdmWopIewotubGbFDu1cNy6orUKPOKvY7/gZnWVpGQQh2sg uBzw== X-Gm-Message-State: AOAM533iTDGNAdsizBnGSHL//ppjwFxvbmExFqHQ0nr4hsKA9oojIrVo CViMH9nReoYqCEkGBCML0/I= X-Google-Smtp-Source: ABdhPJwjq4Ry2+jpc3F1YchXxAJ7/vm4JMrIeWVapo2It0VFSr7WQckvN7FOi1tze1ayG6mx0u7OwA== X-Received: by 2002:a62:cf01:0:b029:3cd:ee82:2ee with SMTP id b1-20020a62cf010000b02903cdee8202eemr42722745pfg.78.1629874789417; Tue, 24 Aug 2021 23:59:49 -0700 (PDT) Received: from ubt.spreadtrum.com ([117.18.48.102]) by smtp.gmail.com with ESMTPSA id q102sm4443109pjq.54.2021.08.24.23.59.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Aug 2021 23:59:48 -0700 (PDT) From: Chunyan Zhang To: Mark Brown , Rob Herring Cc: linux-spi@vger.kernel.org, devicetree@vger.kernel.org, Baolin Wang , Orson Zhai , Chunyan Zhang , Chunyan Zhang , Luting Guo , LKML Subject: [PATCH V2 2/3] dt-bindings: spi: Convert sprd ADI bindings to yaml Date: Wed, 25 Aug 2021 14:59:30 +0800 Message-Id: <20210825065931.2111159-3-zhang.lyra@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210825065931.2111159-1-zhang.lyra@gmail.com> References: <20210825065931.2111159-1-zhang.lyra@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org From: Chunyan Zhang Convert spi-sprd-adi.txt to yaml. Signed-off-by: Chunyan Zhang --- .../devicetree/bindings/spi/spi-sprd-adi.txt | 63 ----------- .../devicetree/bindings/spi/sprd,spi-adi.yaml | 102 ++++++++++++++++++ 2 files changed, 102 insertions(+), 63 deletions(-) delete mode 100644 Documentation/devicetree/bindings/spi/spi-sprd-adi.txt create mode 100644 Documentation/devicetree/bindings/spi/sprd,spi-adi.yaml diff --git a/Documentation/devicetree/bindings/spi/spi-sprd-adi.txt b/Documentation/devicetree/bindings/spi/spi-sprd-adi.txt deleted file mode 100644 index 2567c829e2dc..000000000000 --- a/Documentation/devicetree/bindings/spi/spi-sprd-adi.txt +++ /dev/null @@ -1,63 +0,0 @@ -Spreadtrum ADI controller - -ADI is the abbreviation of Anolog-Digital interface, which is used to access -analog chip (such as PMIC) from digital chip. ADI controller follows the SPI -framework for its hardware implementation is alike to SPI bus and its timing -is compatile to SPI timing. - -ADI controller has 50 channels including 2 software read/write channels and -48 hardware channels to access analog chip. For 2 software read/write channels, -users should set ADI registers to access analog chip. For hardware channels, -we can configure them to allow other hardware components to use it independently, -which means we can just link one analog chip address to one hardware channel, -then users can access the mapped analog chip address by this hardware channel -triggered by hardware components instead of ADI software channels. - -Thus we introduce one property named "sprd,hw-channels" to configure hardware -channels, the first value specifies the hardware channel id which is used to -transfer data triggered by hardware automatically, and the second value specifies -the analog chip address where user want to access by hardware components. - -Since we have multi-subsystems will use unique ADI to access analog chip, when -one system is reading/writing data by ADI software channels, that should be under -one hardware spinlock protection to prevent other systems from reading/writing -data by ADI software channels at the same time, or two parallel routine of setting -ADI registers will make ADI controller registers chaos to lead incorrect results. -Then we need one hardware spinlock to synchronize between the multiple subsystems. - -The new version ADI controller supplies multiple master channels for different -subsystem accessing, that means no need to add hardware spinlock to synchronize, -thus change the hardware spinlock support to be optional to keep backward -compatibility. - -Required properties: -- compatible: Should be "sprd,sc9860-adi". -- reg: Offset and length of ADI-SPI controller register space. -- #address-cells: Number of cells required to define a chip select address - on the ADI-SPI bus. Should be set to 1. -- #size-cells: Size of cells required to define a chip select address size - on the ADI-SPI bus. Should be set to 0. - -Optional properties: -- hwlocks: Reference to a phandle of a hwlock provider node. -- hwlock-names: Reference to hwlock name strings defined in the same order - as the hwlocks, should be "adi". -- sprd,hw-channels: This is an array of channel values up to 49 channels. - The first value specifies the hardware channel id which is used to - transfer data triggered by hardware automatically, and the second - value specifies the analog chip address where user want to access - by hardware components. - -SPI slave nodes must be children of the SPI controller node and can contain -properties described in Documentation/devicetree/bindings/spi/spi-bus.txt. - -Example: - adi_bus: spi@40030000 { - compatible = "sprd,sc9860-adi"; - reg = <0 0x40030000 0 0x10000>; - hwlocks = <&hwlock1 0>; - hwlock-names = "adi"; - #address-cells = <1>; - #size-cells = <0>; - sprd,hw-channels = <30 0x8c20>; - }; diff --git a/Documentation/devicetree/bindings/spi/sprd,spi-adi.yaml b/Documentation/devicetree/bindings/spi/sprd,spi-adi.yaml new file mode 100644 index 000000000000..3e399d31168b --- /dev/null +++ b/Documentation/devicetree/bindings/spi/sprd,spi-adi.yaml @@ -0,0 +1,102 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) + +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/spi/sprd,spi-adi.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Spreadtrum ADI controller + +maintainers: + - Orson Zhai + - Baolin Wang + - Chunyan Zhang + +description: | + ADI is the abbreviation of Anolog-Digital interface, which is used to access + analog chip (such as PMIC) from digital chip. ADI controller follows the SPI + framework for its hardware implementation is alike to SPI bus and its timing + is compatile to SPI timing. + + ADI controller has 50 channels including 2 software read/write channels and + 48 hardware channels to access analog chip. For 2 software read/write channels, + users should set ADI registers to access analog chip. For hardware channels, + we can configure them to allow other hardware components to use it independently, + which means we can just link one analog chip address to one hardware channel, + then users can access the mapped analog chip address by this hardware channel + triggered by hardware components instead of ADI software channels. + + Thus we introduce one property named "sprd,hw-channels" to configure hardware + channels, the first value specifies the hardware channel id which is used to + transfer data triggered by hardware automatically, and the second value specifies + the analog chip address where user want to access by hardware components. + + Since we have multi-subsystems will use unique ADI to access analog chip, when + one system is reading/writing data by ADI software channels, that should be under + one hardware spinlock protection to prevent other systems from reading/writing + data by ADI software channels at the same time, or two parallel routine of setting + ADI registers will make ADI controller registers chaos to lead incorrect results. + Then we need one hardware spinlock to synchronize between the multiple subsystems. + + The new version ADI controller supplies multiple master channels for different + subsystem accessing, that means no need to add hardware spinlock to synchronize, + thus change the hardware spinlock support to be optional to keep backward + compatibility. + +allOf: + - $ref: /spi/spi-controller.yaml# + +properties: + compatible: + enum: + - sprd,sc9860-adi + + reg: + maxItems: 1 + + hwlocks: + maxItems: 1 + + hwlock-names: + const: adi + + sprd,hw-channels: + $ref: /schemas/types.yaml#/definitions/uint32-matrix + description: A list of hardware channels + minItems: 1 + maxItems: 48 + items: + items: + - description: The hardware channel id which is used to transfer data + triggered by hardware automatically, channel id 0-1 are for software + use, 2-49 are hardware channels. + minimum: 2 + maximum: 49 + - description: The analog chip address where user want to access by + hardware components. + +required: + - compatible + - reg + - '#address-cells' + - '#size-cells' + +unevaluatedProperties: false + +examples: + - | + aon { + #address-cells = <2>; + #size-cells = <2>; + + adi_bus: spi@40030000 { + compatible = "sprd,sc9860-adi"; + reg = <0 0x40030000 0 0x10000>; + hwlocks = <&hwlock1 0>; + hwlock-names = "adi"; + #address-cells = <1>; + #size-cells = <0>; + sprd,hw-channels = <30 0x8c20>; + }; + }; +...