From patchwork Wed Apr 14 14:26:56 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: 12202997 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 7F3FBC43460 for ; Wed, 14 Apr 2021 14:27:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 612C860E09 for ; Wed, 14 Apr 2021 14:27:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349545AbhDNO1d (ORCPT ); Wed, 14 Apr 2021 10:27:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33726 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349526AbhDNO12 (ORCPT ); Wed, 14 Apr 2021 10:27:28 -0400 Received: from mail-qt1-x84a.google.com (mail-qt1-x84a.google.com [IPv6:2607:f8b0:4864:20::84a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 05075C061574 for ; Wed, 14 Apr 2021 07:27:05 -0700 (PDT) Received: by mail-qt1-x84a.google.com with SMTP id l7-20020ac80c470000b029019ad46696f7so2018365qti.0 for ; Wed, 14 Apr 2021 07:27:04 -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=aTQH+8QFadrYoaEx7teEfO6F+xF81qJm/gbu7SJfp4M=; b=p+Dy4+wR6puYM9D4rzYQ0dFlGkQtuZiNm05XebXvDRpCrpegQGd4o/KJUwQLnWcb+C BV+LYnY3Brvs4c6UXyblt4WVNqxO4TnsC4IpYTF7PpzIggBhhOwe7tmrYcufexaCx+YE N9q1DjDTTz4DcN1KjkqXsFpCOYmLmQ7SWSQ/dK0gkFiqTyPXUUoTdzVgQCQglg7oJ53T FOTIlNNL7kIlRJWd9uc6aWVy08NIjrTCIdTIuoDvkBqjpQX0iJzTe4mL1IA9gLGWO59Q rgkG4E/DctjmZDiNfn5U+wwVZWp5+SMTQ8uI+WWzVNJvyzXf61gEUNgXk119i9QWHce9 J+4g== 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=aTQH+8QFadrYoaEx7teEfO6F+xF81qJm/gbu7SJfp4M=; b=q2Tz1CUiQPgOzff0ys6DrGtGFHJdMA0Bol1YX4FSYHlUA+PRxbKQvdiQrKtLxxg6yl hmjSLJCQU5/akUbVKP4ygdFOAVwCrT8sa9YQfXNsvQDc+bwDHFlXqoLZCkvpxyRG9go7 zPnFAyBAWwcgocDlVtBUQqiedgwzeGYCOwYwR5j+OiVBt/dWTu/oMIo6iNDsUzzXmc+4 alFAnFiHwI5j5wBsSIcQJgYVV97MU6RKUkK/Tax5qEzp2ZoG+6BtFiH++lUrXw8VpR5x pYntUnTinxSmmBjL8PoyIkMs26YFANq5gjW3H18aESj4efGgfccKcG7QOIGZ/TjfObuT OpyQ== X-Gm-Message-State: AOAM531GiKJSXJYeImkA1xqRQexcURGW8jWrGgc78tVXMhvfFiPAinS0 bXN9DcW4O31p9lr63l5Wgkryw1bEnO4= X-Google-Smtp-Source: ABdhPJy6NCAvWnn2HR6o730wtjP3t0Cu4NnswFnFKu09GrC3WOAoD7SpzOiFFKNOgxoH+d7GVf3p6tR16eY= X-Received: from badhri.mtv.corp.google.com ([2620:15c:211:201:91dd:58ac:7590:aa21]) (user=badhri job=sendgmr) by 2002:a0c:ff02:: with SMTP id w2mr38604856qvt.23.1618410424116; Wed, 14 Apr 2021 07:27:04 -0700 (PDT) Date: Wed, 14 Apr 2021 07:26:56 -0700 In-Reply-To: <20210414142656.63749-1-badhri@google.com> Message-Id: <20210414142656.63749-3-badhri@google.com> Mime-Version: 1.0 References: <20210414142656.63749-1-badhri@google.com> X-Mailer: git-send-email 2.31.1.295.g9ea45b61b8-goog Subject: [PATCH v4 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 Acked-by: Rob Herring --- Changes since v3: * Removed additional semi-colon in the subject line 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