Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757013Ab0GEOo3 (ORCPT ); Mon, 5 Jul 2010 10:44:29 -0400 Received: from mga03.intel.com ([143.182.124.21]:60744 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756256Ab0GEOo1 (ORCPT ); Mon, 5 Jul 2010 10:44:27 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.53,540,1272870000"; d="scan'208";a="296676676" From: feng.tang@intel.com To: linux-kernel@vger.kernel.org, tglx@linutronix.de, mingo@elte.hu, hpa@zytor.com, jacob.jun.pan@intel.com, dtor@mail.ru, randy.dunlap@oracle.com Cc: Feng Tang Subject: [PATCH v2 1/5] x86: add i8042 pre-detection hook to x86_platform_ops Date: Mon, 5 Jul 2010 23:03:18 +0800 Message-Id: <1278342202-10973-2-git-send-email-feng.tang@intel.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1278342202-10973-1-git-send-email-feng.tang@intel.com> References: <1278342202-10973-1-git-send-email-feng.tang@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2207 Lines: 61 From: Feng Tang Some x86 platforms like intel MID platforms don't have i8042 controllers, and i8042 driver's probe to some legacy IO ports may hang the MID processor. With this hook, i8042 driver can runtime check and skip the probe when the pretection fail which also saves some probe time Signed-off-by: Feng Tang --- arch/x86/include/asm/x86_init.h | 2 ++ arch/x86/kernel/x86_init.c | 4 +++- 2 files changed, 5 insertions(+), 1 deletions(-) diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h index 519b543..baa579c 100644 --- a/arch/x86/include/asm/x86_init.h +++ b/arch/x86/include/asm/x86_init.h @@ -142,6 +142,7 @@ struct x86_cpuinit_ops { * @set_wallclock: set time back to HW clock * @is_untracked_pat_range exclude from PAT logic * @nmi_init enable NMI on cpus + * @i8042_detect pre-detect if i8042 controller exists */ struct x86_platform_ops { unsigned long (*calibrate_tsc)(void); @@ -150,6 +151,7 @@ struct x86_platform_ops { void (*iommu_shutdown)(void); bool (*is_untracked_pat_range)(u64 start, u64 end); void (*nmi_init)(void); + int (*i8042_detect)(void); }; extern struct x86_init_ops x86_init; diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c index 61a1e8c..1e0c863 100644 --- a/arch/x86/kernel/x86_init.c +++ b/arch/x86/kernel/x86_init.c @@ -85,6 +85,7 @@ struct x86_cpuinit_ops x86_cpuinit __cpuinitdata = { }; static void default_nmi_init(void) { }; +static int default_i8042_detect(void) { return 1; }; struct x86_platform_ops x86_platform = { .calibrate_tsc = native_calibrate_tsc, @@ -92,5 +93,6 @@ struct x86_platform_ops x86_platform = { .set_wallclock = mach_set_rtc_mmss, .iommu_shutdown = iommu_shutdown_noop, .is_untracked_pat_range = is_ISA_range, - .nmi_init = default_nmi_init + .nmi_init = default_nmi_init, + .i8042_detect = default_i8042_detect }; -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/