From patchwork Wed Apr 14 02:40:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Badhri Jagan Sridharan X-Patchwork-Id: 421986 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=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=unavailable 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 8EC3FC433B4 for ; Wed, 14 Apr 2021 02:40:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 72B6B61131 for ; Wed, 14 Apr 2021 02:40:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345824AbhDNCkd (ORCPT ); Tue, 13 Apr 2021 22:40:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48346 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345704AbhDNCka (ORCPT ); Tue, 13 Apr 2021 22:40:30 -0400 Received: from mail-pj1-x1049.google.com (mail-pj1-x1049.google.com [IPv6:2607:f8b0:4864:20::1049]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AAD00C06175F for ; Tue, 13 Apr 2021 19:40:09 -0700 (PDT) Received: by mail-pj1-x1049.google.com with SMTP id q10-20020a17090a2dcab029014e44f5454aso5667637pjm.4 for ; Tue, 13 Apr 2021 19:40:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=qaeiP4TcmkgXReccF8JNSG63nl5JyNyZTFgqbhXpA8w=; b=Inaem3hvoh6bBnQ/t6s8zhXAyDUbPjoohiMB3we9nLNBh9OKJSk3yK1ERidnzbCHKZ 8av0rHQJyFviHs3ODvVWEuBu5GgTUa02STo6Z1Vh0ois97JRYkWHQyptVwRgwoRqqdlp jJfbzKXePPrVxhP0YSvbNs9AJ1lvAxYtAyPxAdzq66BU8IVKBGZXLTzI+mc7OlKjsF3l b/8UvlKL+4XI5AlKBqS5QDBKrFGMW3hzsYog3y+O+yWhQpaO4jb6Q+GJFGG3CnCXY5zb LebyUhmGy0RY2GgthKz/nGW7bfOuMWsmoe1FNMfsvD7Fw+fNnuPNXzEdftYUUZVvApUC 0olw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=qaeiP4TcmkgXReccF8JNSG63nl5JyNyZTFgqbhXpA8w=; b=Bzup8pwo2dc+lTe5H+ZzyO2aF9XY8nbJHP+n7pG/SNFCwgZiAU68xYNnpl7/HWHmzo hp1q6eSKsvNrVlkPPo2zBaAwqBm9iMR0FFPJ3ynT7+em2DGHVzg5VGfN9KGVSN0bkoSB 1akXvna0i1/7d9ZsMZI/hV8N8XTCZj46wDcLd938N+ZMfP8WjoBrtRv7tbsPaSv/kEyO 38IMjLY2R1IeO3/QC6oH6h1TeoQzTJnkOMw/IkTEdpYKlRizQ/cu6IT/4tzJHmvYQTwB UhaYkcfQsUVl0e+rulXVDWbH82+YNP9ZidOdBL/89/5RUiMvYhMcQ54RWbNjbeQyWX70 Wb7g== X-Gm-Message-State: AOAM533MZ4pszB6LP+nnmKp4qdYTuYD1BVXWbLd7JdCb1mQ3QpxdGBhu wS/VAX4vV6a6kMSdT/1ryLg//EeQVHo= X-Google-Smtp-Source: ABdhPJwPV18N9xjx5dwA3igxAJiFUaZL/VMUHoyaPfs+7PbKnBAcBE9xSAnWOXyldokRvRo3Bqkk4S2P2pk= X-Received: from badhri.mtv.corp.google.com ([2620:15c:211:201:91dd:58ac:7590:aa21]) (user=badhri job=sendgmr) by 2002:a62:4d86:0:b029:252:c889:2dd8 with SMTP id a128-20020a624d860000b0290252c8892dd8mr1790835pfb.41.1618368009191; Tue, 13 Apr 2021 19:40:09 -0700 (PDT) Date: Tue, 13 Apr 2021 19:40:00 -0700 In-Reply-To: <20210414024000.4175263-1-badhri@google.com> Message-Id: <20210414024000.4175263-3-badhri@google.com> Mime-Version: 1.0 References: <20210414024000.4175263-1-badhri@google.com> X-Mailer: git-send-email 2.31.1.295.g9ea45b61b8-goog Subject: [PATCH v3 3/3] dt-bindings:: connector: Add slow-charger-loop definition From: Badhri Jagan Sridharan To: Guenter Roeck , Heikki Krogerus , Greg Kroah-Hartman , Rob Herring , Adam Thomson Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Kyle Tso , Badhri Jagan Sridharan Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Allows PMIC charger loops which are slow(i.e. cannot meet the 15ms deadline) to still comply to pSnkStby i.e Maximum power that can be consumed by sink while in Sink Standby state as defined in 7.4.2 Sink Electrical Parameters of USB Power Delivery Specification Revision 3.0, Version 1.2. This patch introduces slow-charger-loop which when set makes the port request PD_P_SNK_STDBY_MW(2.5W i.e 500mA@5V) upon entering SNK_DISCOVERY (instead of 3A or the 1.5A during SNK_DISCOVERY) and the actual currrent limit after RX of PD_CTRL_PSRDY for PD link or during SNK_READY for non-pd link. Signed-off-by: Badhri Jagan Sridharan --- Changes since V2: To address Rob's comments * Updated commit and the binding description. * Updated subject as well. --- .../devicetree/bindings/connector/usb-connector.yaml | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/Documentation/devicetree/bindings/connector/usb-connector.yaml b/Documentation/devicetree/bindings/connector/usb-connector.yaml index b6daedd62516..32509b98142e 100644 --- a/Documentation/devicetree/bindings/connector/usb-connector.yaml +++ b/Documentation/devicetree/bindings/connector/usb-connector.yaml @@ -197,6 +197,16 @@ properties: $ref: /schemas/types.yaml#/definitions/uint32 enum: [1, 2, 3] + slow-charger-loop: + description: Allows PMIC charger loops which are slow(i.e. cannot meet the 15ms deadline) to + still comply to pSnkStby i.e Maximum power that can be consumed by sink while in Sink Standby + state as defined in 7.4.2 Sink Electrical Parameters of USB Power Delivery Specification + Revision 3.0, Version 1.2. When the property is set, the port requests pSnkStby(2.5W - + 5V@500mA) upon entering SNK_DISCOVERY(instead of 3A or the 1.5A, Rp current advertised, during + SNK_DISCOVERY) and the actual currrent limit after reception of PS_Ready for PD link or during + SNK_READY for non-pd link. + type: boolean + required: - compatible