From patchwork Fri Feb 28 09:56:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Lokesh Vutla X-Patchwork-Id: 211612 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=-9.9 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT 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 43C13C3F2D2 for ; Fri, 28 Feb 2020 09:58:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 14A05246A8 for ; Fri, 28 Feb 2020 09:58:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="zUyGEwgv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727028AbgB1J57 (ORCPT ); Fri, 28 Feb 2020 04:57:59 -0500 Received: from fllv0015.ext.ti.com ([198.47.19.141]:34612 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726975AbgB1J55 (ORCPT ); Fri, 28 Feb 2020 04:57:57 -0500 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 01S9vrS7045015; Fri, 28 Feb 2020 03:57:53 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1582883873; bh=HYpEUc4DlOdrjcU8QuE3wFkAhg+XHUdNw32emLZQJFI=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=zUyGEwgvLNsxF/3IDlZan38w+0YDtyKN9fCDqlC0nKFtIgI91xQKyZNgVHghFBxtq j/LSbb7q2xfH7NXfJXHW+rcSV4wT+yOmH9Gf7efxvxbk9IvrVKncGlfst2VEMFPmEO NkKYjCwDUH7//q2oZMLkqXSv7EilYBPAR6bcBPu8= Received: from DFLE113.ent.ti.com (dfle113.ent.ti.com [10.64.6.34]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTP id 01S9vr1O104660; Fri, 28 Feb 2020 03:57:53 -0600 Received: from DFLE115.ent.ti.com (10.64.6.36) by DFLE113.ent.ti.com (10.64.6.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Fri, 28 Feb 2020 03:57:52 -0600 Received: from localhost.localdomain (10.64.41.19) by DFLE115.ent.ti.com (10.64.6.36) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3 via Frontend Transport; Fri, 28 Feb 2020 03:57:52 -0600 Received: from uda0131933.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by localhost.localdomain (8.15.2/8.15.2) with ESMTP id 01S9vhLG115767; Fri, 28 Feb 2020 03:57:50 -0600 From: Lokesh Vutla To: Thierry Reding , =?utf-8?q?Uwe_Kleine-K?= =?utf-8?b?w7ZuaWc=?= CC: Tony Lindgren , Linux OMAP Mailing List , , , Sekhar Nori , Vignesh R , Lokesh Vutla Subject: [PATCH v2 2/6] pwm: omap-dmtimer: Update description for pwm omap dm timer Date: Fri, 28 Feb 2020 15:26:47 +0530 Message-ID: <20200228095651.32464-3-lokeshvutla@ti.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200228095651.32464-1-lokeshvutla@ti.com> References: <20200228095651.32464-1-lokeshvutla@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Update the description with a brief about how pwm is generated using OMAP DM timer. Also add link to the Reference Manual. Suggested-by: Uwe Kleine-König Signed-off-by: Lokesh Vutla --- drivers/pwm/pwm-omap-dmtimer.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/pwm/pwm-omap-dmtimer.c b/drivers/pwm/pwm-omap-dmtimer.c index e4f5f710bfaa..a24a630ccdb9 100644 --- a/drivers/pwm/pwm-omap-dmtimer.c +++ b/drivers/pwm/pwm-omap-dmtimer.c @@ -10,7 +10,11 @@ * * Description: * This file is the core OMAP support for the generic, Linux - * PWM driver / controller, using the OMAP's dual-mode timers. + * PWM driver / controller, using the OMAP's dual-mode timers + * with a timer counter that goes up. When it overflows it gets + * reloaded with the load value and the pwm output goes up. + * When counter matches with match register, the output goes down. + * Reference Manual: http://www.ti.com/lit/ug/spruh73q/spruh73q.pdf */ #include