From patchwork Thu Apr 15 12:14:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Clemens Gruber X-Patchwork-Id: 1466602 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pwm-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; secure) header.d=pqgruber.com header.i=@pqgruber.com header.a=rsa-sha256 header.s=mail header.b=mlRaz656; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4FLdb910QXz9sV5 for ; Thu, 15 Apr 2021 22:15:33 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232799AbhDOMPz (ORCPT ); Thu, 15 Apr 2021 08:15:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37354 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232796AbhDOMPw (ORCPT ); Thu, 15 Apr 2021 08:15:52 -0400 Received: from mail.pqgruber.com (mail.pqgruber.com [IPv6:2a05:d014:575:f70b:4f2c:8f1d:40c4:b13e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ABFA5C061574; Thu, 15 Apr 2021 05:15:29 -0700 (PDT) Received: from workstation.tuxnet (213-47-165-233.cable.dynamic.surfer.at [213.47.165.233]) by mail.pqgruber.com (Postfix) with ESMTPSA id 0C362C725D8; Thu, 15 Apr 2021 14:15:28 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=pqgruber.com; s=mail; t=1618488928; bh=GlsSSVic5H44j5iEOaImBYJ/UJ6bO5xkDJrawlhvIZI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mlRaz6562tGiTImHsG2r9+X2/0S3ogOJED7lQ5HORi+GmvR76y3IekxPwcXVnCbyN zgxrygxD4+Oe2KIkaFpP3isElPstaCeCg5Ys0MW6CTZIhII4Nn3wXVCjDgd9EjKGNY KM3VqR7lv2yQHPYjIrx52Eusj2KL+5rJDYZ9Aj7U= From: Clemens Gruber To: linux-pwm@vger.kernel.org Cc: Thierry Reding , Sven Van Asbroeck , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Clemens Gruber , Rob Herring Subject: [PATCH v9 4/8] dt-bindings: pwm: Support new PWM_USAGE_POWER flag Date: Thu, 15 Apr 2021 14:14:51 +0200 Message-Id: <20210415121455.39536-4-clemens.gruber@pqgruber.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210415121455.39536-1-clemens.gruber@pqgruber.com> References: <20210415121455.39536-1-clemens.gruber@pqgruber.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pwm@vger.kernel.org Add the flag and corresponding documentation for PWM_USAGE_POWER. Cc: Rob Herring Signed-off-by: Clemens Gruber --- Documentation/devicetree/bindings/pwm/pwm.txt | 3 +++ include/dt-bindings/pwm/pwm.h | 1 + 2 files changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/pwm/pwm.txt b/Documentation/devicetree/bindings/pwm/pwm.txt index 084886bd721e..fe3a28f887c0 100644 --- a/Documentation/devicetree/bindings/pwm/pwm.txt +++ b/Documentation/devicetree/bindings/pwm/pwm.txt @@ -46,6 +46,9 @@ period in nanoseconds. Optionally, the pwm-specifier can encode a number of flags (defined in ) in a third cell: - PWM_POLARITY_INVERTED: invert the PWM signal polarity +- PWM_USAGE_POWER: Only care about the power output of the signal. This + allows drivers (if supported) to optimize the signals, for example to + improve EMI and reduce current spikes. Example with optional PWM specifier for inverse polarity diff --git a/include/dt-bindings/pwm/pwm.h b/include/dt-bindings/pwm/pwm.h index ab9a077e3c7d..0d5a8f0c0035 100644 --- a/include/dt-bindings/pwm/pwm.h +++ b/include/dt-bindings/pwm/pwm.h @@ -11,5 +11,6 @@ #define _DT_BINDINGS_PWM_PWM_H #define PWM_POLARITY_INVERTED (1 << 0) +#define PWM_USAGE_POWER (1 << 1) #endif