From mboxrd@z Thu Jan 1 00:00:00 1970 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=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 2903DC433E1 for ; Fri, 21 Aug 2020 16:23:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EDE5820578 for ; Fri, 21 Aug 2020 16:23:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598026991; bh=70t5adgBvf44/5oNg7PVocR68bEeQ479Hja1iNE5dd8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=GNw9Fk+iaZ51uAggG+Z1VqYTnrE9xbJq1MifBAxCmsAU9wYElZh2Ld/jhRafADmie W72qCOBLe2Oeut6R+OmbwbAhlsplqO+iKquNbgZ1aEfo8ICMcr0JFB30mw0SqDZLNC yqFnXukAtPXEq3X2q9FtVQmTIS0na6KKv0e37Q7k= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728551AbgHUQXG (ORCPT ); Fri, 21 Aug 2020 12:23:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:49728 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726809AbgHUQT3 (ORCPT ); Fri, 21 Aug 2020 12:19:29 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6210822D37; Fri, 21 Aug 2020 16:18:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598026719; bh=70t5adgBvf44/5oNg7PVocR68bEeQ479Hja1iNE5dd8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ih7ut0ecoMmi3ZCJp1vqmKbQ+2g8vqjyvlZZGZxWosmgUT+qNaoT653vTptIPlHb1 xGKUecDwddshg1V0Gv1xH13GVT1ku4yby36MHicpa4x3EnQrtHxuj2VF565sxUBw92 EucJTwPyWbBtMWbXrUc3O5Fm8j4IcNKhMDJ9MIIU= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Yangbo Lu , Richard Cochran , Shawn Guo , Sasha Levin , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 24/38] ARM: dts: ls1021a: output PPS signal on FIPER2 Date: Fri, 21 Aug 2020 12:17:53 -0400 Message-Id: <20200821161807.348600-24-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200821161807.348600-1-sashal@kernel.org> References: <20200821161807.348600-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yangbo Lu [ Upstream commit 5656bb3857c4904d1dec6e1b8f876c1c0337274e ] The timer fixed interval period pulse generator register is used to generate periodic pulses. The down count register loads the value programmed in the fixed period interval (FIPER). At every tick of the timer accumulator overflow, the counter decrements by the value of TMR_CTRL[TCLK_PERIOD]. It generates a pulse when the down counter value reaches zero. It reloads the down counter in the cycle following a pulse. To use the TMR_FIPER register to generate desired periodic pulses. The value should programmed is, desired_period - tclk_period Current tmr-fiper2 value is to generate 100us periodic pulses. (But the value should have been 99995, not 99990. The tclk_period is 5.) This patch is to generate 1 second periodic pulses with value 999999995 programmed which is more desired by user. Signed-off-by: Yangbo Lu Acked-by: Richard Cochran Signed-off-by: Shawn Guo Signed-off-by: Sasha Levin --- arch/arm/boot/dts/ls1021a.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/ls1021a.dtsi b/arch/arm/boot/dts/ls1021a.dtsi index 074b4ec520c63..d18c043264440 100644 --- a/arch/arm/boot/dts/ls1021a.dtsi +++ b/arch/arm/boot/dts/ls1021a.dtsi @@ -609,7 +609,7 @@ ptp_clock@2d10e00 { fsl,tmr-prsc = <2>; fsl,tmr-add = <0xaaaaaaab>; fsl,tmr-fiper1 = <999999995>; - fsl,tmr-fiper2 = <99990>; + fsl,tmr-fiper2 = <999999995>; fsl,max-adj = <499999999>; }; -- 2.25.1