From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754660AbcEBRMc (ORCPT ); Mon, 2 May 2016 13:12:32 -0400 Received: from mail-bn1bon0114.outbound.protection.outlook.com ([157.56.111.114]:16996 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753976AbcEBRMZ (ORCPT ); Mon, 2 May 2016 13:12:25 -0400 Authentication-Results: spf=pass (sender IP is 204.77.163.247) smtp.mailfrom=garmin.com; vger.kernel.org; dkim=none (message not signed) header.d=none;vger.kernel.org; dmarc=bestguesspass action=none header.from=garmin.com; From: "J.D. Schroeder" To: , , , , , , , , , , , , CC: Subject: [PATCH v2 2/3] ARM: DRA7x: dts: Update the OSC_32K_CLK frequency Date: Mon, 2 May 2016 12:12:02 -0500 Message-ID: <1462209123-7332-3-git-send-email-Linux.HWI@garmin.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1462209123-7332-1-git-send-email-Linux.HWI@garmin.com> References: <20160427171658.GA5995@atomide.com> <1462209123-7332-1-git-send-email-Linux.HWI@garmin.com> MIME-Version: 1.0 Content-Type: text/plain X-TM-AS-Product-Ver: SMEX-11.0.0.4179-8.000.1202-22298.001 X-TM-AS-Result: No--1.783800-0.000000-31 X-TM-AS-User-Approved-Sender: Yes X-TM-AS-User-Blocked-Sender: No X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:204.77.163.247;IPV:NLI;CTRY:US;EFV:NLI;SFV:NSPM;SFS:(10019020)(6009001)(2980300002)(438002)(189002)(199003)(6806005)(2201001)(189998001)(36756003)(2906002)(92566002)(586003)(86362001)(48376002)(575784001)(4001430100002)(19580395003)(50466002)(40036005)(1096002)(4326007)(19580405001)(1220700001)(5008740100001)(87936001)(106466001)(11100500001)(47776003)(5001770100001)(16796002)(15650500001)(81166005)(229853001)(77096005)(107886002)(50226002)(2950100001)(5003940100001)(50986999)(5003600100002)(76176999)(921003)(1121003)(83996005)(2101003);DIR:OUT;SFP:1102;SCL:1;SRVR:CY1PR0401MB1338;H:garmin.com;FPR:;SPF:Pass;MLV:sfv;MX:1;A:1;LANG:en; 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Schroeder" This commit updates the OSC_32K_CLK (secure_32k_clk_src_ck) frequency from the precise 32kHz frequency (i.e., 32.768 kHz) to a more accurate frequency of ~34.6 kHz. Actual measured frequencies of the clock vary from processor to processor anywhere from 34.4 kHz up to 34.8 kHz. Note that the ~34 kHz frequency clock is generated internally by the processor, not an input to the processor. This change makes it more clear that the consumer of the secure_32k_clk_src_ck will not get a precise 32.768 kHz frequency output. Signed-off-by: J.D. Schroeder Reviewed-by: Trenton Andres --- arch/arm/boot/dts/dra7xx-clocks.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/dra7xx-clocks.dtsi b/arch/arm/boot/dts/dra7xx-clocks.dtsi index 3f0c61d..f7ec976 100644 --- a/arch/arm/boot/dts/dra7xx-clocks.dtsi +++ b/arch/arm/boot/dts/dra7xx-clocks.dtsi @@ -95,7 +95,7 @@ secure_32k_clk_src_ck: secure_32k_clk_src_ck { #clock-cells = <0>; compatible = "fixed-clock"; - clock-frequency = <32768>; + clock-frequency = <34600>; /* approximate frequency */ }; sys_clk32_crystal_ck: sys_clk32_crystal_ck { -- 1.9.1