From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755658AbcCaEOk (ORCPT ); Thu, 31 Mar 2016 00:14:40 -0400 Received: from mail-yw0-f194.google.com ([209.85.161.194]:32804 "EHLO mail-yw0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753108AbcCaEOf (ORCPT ); Thu, 31 Mar 2016 00:14:35 -0400 From: Len Brown To: x86@kernel.org Cc: linux-kernel@vger.kernel.org, Len Brown Subject: [PATCH 4/9] x86 tsc_msr: Correct Silvermont reference clock values Date: Thu, 31 Mar 2016 00:13:50 -0400 Message-Id: X-Mailer: git-send-email 2.8.0.rc4.16.g56331f8 In-Reply-To: <1459397635-4871-1-git-send-email-lenb@kernel.org> References: <1459397635-4871-1-git-send-email-lenb@kernel.org> In-Reply-To: <6e0c25e64e0fb65a42dfc63ad5f660302e07cd87.1459397558.git.len.brown@intel.com> References: <6e0c25e64e0fb65a42dfc63ad5f660302e07cd87.1459397558.git.len.brown@intel.com> Reply-To: Len Brown Organization: Intel Open Source Technology Center Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Len Brown Atom processors use a 19.2 MHz crystal oscillator. Early processors generate 100 MHz via 19.2 MHz * 26 / 5 = 99.84 MHz. Later preocessor generate 100 MHz via 19.2 MHz * 125 / 24 = 100 MHz. Update the Silvermont-based tables accordingly, matching the Software Developers Manual. Also, correct a 166 MHz entry that should have been 116 MHz, and add a missing 80 MHz entry. Reported-by: Stephane Gasparini Signed-off-by: Len Brown --- arch/x86/kernel/tsc_msr.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/tsc_msr.c b/arch/x86/kernel/tsc_msr.c index 3a866bc..19f2a9a 100644 --- a/arch/x86/kernel/tsc_msr.c +++ b/arch/x86/kernel/tsc_msr.c @@ -35,11 +35,11 @@ static struct freq_desc freq_desc_tables[] = { /* CLV+ */ { 6, 0x35, 0, { 0, 133200, 0, 0, 0, 99840, 0, 83200 } }, /* TNG - Intel Atom processor Z3400 series */ - { 6, 0x4a, 1, { 0, 99840, 133200, 0, 0, 0, 0, 0 } }, + { 6, 0x4a, 1, { 0, 100000, 133300, 0, 0, 0, 0, 0 } }, /* VLV2 - Intel Atom processor E3000, Z3600, Z3700 series */ - { 6, 0x37, 1, { 83200, 99840, 133200, 166400, 0, 0, 0, 0 } }, + { 6, 0x37, 1, { 83300, 100000, 133300, 116700, 80000, 0, 0, 0 } }, /* ANN - Intel Atom processor Z3500 series */ - { 6, 0x5a, 1, { 83200, 99840, 133200, 99840, 0, 0, 0, 0 } }, + { 6, 0x5a, 1, { 83300, 100000, 133300, 100000, 0, 0, 0, 0 } }, }; static int match_cpu(u8 family, u8 model) -- 2.8.0.rc4.16.g56331f8