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: 421484 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=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 760B4C433ED 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 5720E6120E for ; Wed, 14 Apr 2021 02:40:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345804AbhDNCkd (ORCPT ); Tue, 13 Apr 2021 22:40:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48342 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345674AbhDNCka (ORCPT ); Tue, 13 Apr 2021 22:40:30 -0400 Received: from mail-pj1-x104a.google.com (mail-pj1-x104a.google.com [IPv6:2607:f8b0:4864:20::104a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A324AC061574 for ; Tue, 13 Apr 2021 19:40:09 -0700 (PDT) Received: by mail-pj1-x104a.google.com with SMTP id m1-20020a17090a7f81b029014e3dc1b035so6011266pjl.0 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=fH/HVf4YxhL3pqh876nZxXBTRVcdEZJ9gF5Gd3aCjH1Bamfq8U7xup8MrBdtGf6zzs l5o8r1OkHfklIjqkOAVarxyFNBwhxKOkydT/qYfZ2MZOrXbyRmaQTeKDbnrOF3nVSHMU KBclktxcKP+4OzIqtAjIjLBgjEZ1LlhIt4LQMYxSU0qEhOwh3hK6ZYQO4LF3AhAtwzCN EcFbuADnpinngQdkq8txW+UIKgEvmZjFdD26xbu3cDw+dW24wNgvBA3PPfJtvnW8WQlZ /pXqb9n3F9KENy2hl8N/9NqzmflTcuR3VpLkW9b5pNyVZdz9e+gJbBCTyPaSc2kHp/Zi yuAA== X-Gm-Message-State: AOAM533cMupQIFJOb3g0l+fk45ButU9gOdC3ayWZMJ84HesY5aMqCBzX s14ZvNkGGkRN87f3wlPnGC8JaJDVI2M= 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: linux-usb@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