From patchwork Fri Jan 26 06:34:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen-Yu Tsai X-Patchwork-Id: 766546 Received: from mail-oi1-f181.google.com (mail-oi1-f181.google.com [209.85.167.181]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 646BE1D559 for ; Fri, 26 Jan 2024 06:35:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.181 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706250912; cv=none; b=hrL1NC+Hjm0U8tElLWnm39bpKkoYmRKmCXabGVVFTX7UtLx58v73XoA0jCFg5EQ7TSW+vA587g1xdMvjmiVxoQoID0kUq1mMZf8nR/9UojUKwKqVgKEILRtloTJWVHaO6GFISaW/2hvlhhvm3ODeC/naXcscz70/9gBbPA8b4s4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706250912; c=relaxed/simple; bh=5GcKspq0sMdDxo+UcPZnccatMORdMIGaN6teLn0eoa0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QHzxzf3KtdYEmA7JcvAjLKa2BFlChmcMqcnVfaiFrQiEUnis64S+TvnMyXMCg7RKda6vLbVTHE08qmV/m4MyOWb7+IIw40QXDtu3R8ZmYWeyPT+HrGICqWApmoYgp5ZxSXO4rNyjIeitMtx1CFLBrnmb+UDCP1PXLid1I7B9hwY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=JwPEojnr; arc=none smtp.client-ip=209.85.167.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="JwPEojnr" Received: by mail-oi1-f181.google.com with SMTP id 5614622812f47-3bde3403a59so224694b6e.1 for ; Thu, 25 Jan 2024 22:35:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1706250908; x=1706855708; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=wDsngDFt0eFkFTP4ef0B62TIJS7yfiBrPs76zEjZeSM=; b=JwPEojnr3HIN7q3xXNGIPqLMH3CcKTdX3CQFnggugoe9QdPyV3GTtsHFfyVm9uNNAE 58FUc+2D/6uGqfZOHVi/WbZUcT4Fdz0XvPmcf7nvL3jg3arMfhUWbW9wQ60+o9GUlvxs NpPBqCP91fS1Vv6P20VZevkHkPPLsdYy9LBsk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1706250908; x=1706855708; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=wDsngDFt0eFkFTP4ef0B62TIJS7yfiBrPs76zEjZeSM=; b=wuU75blsSfeP2LnvrXV9Yd6at1nOoEET3j4rgXmhpp13GcxCe2SncG/+wOd57s9i02 BOVJKmFYAuvFao/P6wmfOjIPQjaQtwq24TZSzY0cTaBrYiyFyfBDK7dqnb5LTToCA8CN 63V4OVKI5v+GYthyCA5x3+gi+Edxl7+uhEDT02AyR/xVi7kyBV0OFB/ijY8XEydG3utV p1R4DijWKANQTqWFP6VJxIFaAzONPU5oHB6G94O0/VnXY1fHa4doQXhQK7TQZ/EMt3Pu 6OQN60zJuZ3AYiiP0zrNPnC3yM78dLUlEi3kWY1WiF6H1j77vqO2G9pGIEMOrSLIkPsC p6eQ== X-Gm-Message-State: AOJu0YxW064plm1B4mfm2AwogmoYyoXELNWDLc5rulpgSBPTq0ez0Q3m SiJbUq+5gJ3A6m3r+MK648cAE91OGp2C6IO38uxNQ4hfLd2la6lEAHSuyPD9og== X-Google-Smtp-Source: AGHT+IGQ0RrYFrE/G7ixXxOx0VLO+jMdzh2GLdyIi33vbvVB62vyH+LC0DkBdAKj+7A2YXACQFZ1bw== X-Received: by 2002:a05:6808:320b:b0:3bd:df12:e966 with SMTP id cb11-20020a056808320b00b003bddf12e966mr1498123oib.90.1706250908541; Thu, 25 Jan 2024 22:35:08 -0800 (PST) Received: from wenstp920.tpe.corp.google.com ([2401:fa00:1:10:2614:bbbd:8db2:1f54]) by smtp.gmail.com with ESMTPSA id ka3-20020a056a00938300b006db13a02921sm488735pfb.183.2024.01.25.22.35.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Jan 2024 22:35:08 -0800 (PST) From: Chen-Yu Tsai To: Marcel Holtmann , Luiz Augusto von Dentz , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno Cc: Chen-Yu Tsai , Sean Wang , linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org, linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/2] dt-bindings: net: bluetooth: Add MediaTek MT7921S SDIO Bluetooth Date: Fri, 26 Jan 2024 14:34:57 +0800 Message-ID: <20240126063500.2684087-2-wenst@chromium.org> X-Mailer: git-send-email 2.43.0.429.g432eaa2c6b-goog In-Reply-To: <20240126063500.2684087-1-wenst@chromium.org> References: <20240126063500.2684087-1-wenst@chromium.org> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The MediaTek MT7921S is a WiFi/Bluetooth combo chip that works over SDIO. While the Bluetooth function is fully discoverable, the chip has a pin that can reset just the Bluetooth side, as opposed to the full chip. This needs to be described in the device tree. Add a device tree binding for MT7921S Bluetooth over SDIO specifically ot document the reset line. Cc: Sean Wang Signed-off-by: Chen-Yu Tsai Reviewed-by: AngeloGioacchino Del Regno --- Changes since v1: - Reworded descriptions - Moved binding maintainer section before description - Added missing reference to bluetooth-controller.yaml - Added missing GPIO header to example .../bluetooth/mediatek,mt7921s-bluetooth.yaml | 53 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 54 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/bluetooth/mediatek,mt7921s-bluetooth.yaml diff --git a/Documentation/devicetree/bindings/net/bluetooth/mediatek,mt7921s-bluetooth.yaml b/Documentation/devicetree/bindings/net/bluetooth/mediatek,mt7921s-bluetooth.yaml new file mode 100644 index 000000000000..ff11c95c816c --- /dev/null +++ b/Documentation/devicetree/bindings/net/bluetooth/mediatek,mt7921s-bluetooth.yaml @@ -0,0 +1,53 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/net/bluetooth/mediatek,mt7921s-bluetooth.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MediaTek MT7921S Bluetooth + +maintainers: + - Sean Wang + +description: + MT7921S is an SDIO-attached dual-radio WiFi+Bluetooth Combo chip; each + function is its own SDIO function on a shared SDIO interface. The chip + has two dedicated reset lines, one for each function core. + This binding only covers the Bluetooth part of the chip. + +allOf: + - $ref: bluetooth-controller.yaml# + +properties: + compatible: + enum: + - mediatek,mt7921s-bluetooth + reg: + const: 2 + + reset-gpios: + maxItems: 1 + description: + An active-low reset line for the Bluetooth core; on typical M.2 + key E modules this is the W_DISABLE2# pin. + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + #include + + mmc { + #address-cells = <1>; + #size-cells = <0>; + + bluetooth@2 { + compatible = "mediatek,mt7921s-bluetooth"; + reg = <2>; + reset-gpios = <&pio 8 GPIO_ACTIVE_LOW>; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index b64a64ca7916..662957146852 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13657,6 +13657,7 @@ M: Sean Wang L: linux-bluetooth@vger.kernel.org L: linux-mediatek@lists.infradead.org (moderated for non-subscribers) S: Maintained +F: Documentation/devicetree/bindings/net/bluetooth/mediatek,mt7921s-bluetooth.yaml F: Documentation/devicetree/bindings/net/mediatek-bluetooth.txt F: drivers/bluetooth/btmtkuart.c