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 D2396C433E1 for ; Fri, 21 Aug 2020 17:16:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A45C20748 for ; Fri, 21 Aug 2020 17:16:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598030185; bh=NZ1zbKrwo5IZCErTAktS1k3LZeAW/QGyONeoRh3BaGs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ZhiLLWmqHrTdLnbgLlfLP64qgW0I2FbcKumrwJIpS9hOZ0XgrQ9PTbFWcnViJ7npL 7IvATJmQMcI7Inr1feg8Li1V22lC4KuR09xrpJLm8QxepNREefKvSe6koPTnzFJOYz nIwvQaqoYixQ+9dVm67cxgdblznKtWur09ik28AE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729043AbgHURQX (ORCPT ); Fri, 21 Aug 2020 13:16:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:49958 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728090AbgHUQQe (ORCPT ); Fri, 21 Aug 2020 12:16:34 -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 722E222BEB; Fri, 21 Aug 2020 16:16:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598026594; bh=NZ1zbKrwo5IZCErTAktS1k3LZeAW/QGyONeoRh3BaGs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=T0AolvIssbvG74Ggc0PO63MYwlCtD2QjBmJTrIGPgwz7DAwvKUCs7QCW+kaUroLPB zJr/klGu6px2mldQwHY4G2dmmXb/zBlNekscWFH8aCprUVw5Q0br6EKVW+4F0AXmCR py2+QWbXahfBV7K1CqI6alU9/621IyOS5WaCj8oc= 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 5.7 38/61] ARM: dts: ls1021a: output PPS signal on FIPER2 Date: Fri, 21 Aug 2020 12:15:22 -0400 Message-Id: <20200821161545.347622-38-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200821161545.347622-1-sashal@kernel.org> References: <20200821161545.347622-1-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 760a68c163c83..b2ff27af090ec 100644 --- a/arch/arm/boot/dts/ls1021a.dtsi +++ b/arch/arm/boot/dts/ls1021a.dtsi @@ -772,7 +772,7 @@ 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>; fsl,extts-fifo; }; -- 2.25.1