From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755613AbeASJEz (ORCPT ); Fri, 19 Jan 2018 04:04:55 -0500 Received: from mga06.intel.com ([134.134.136.31]:52689 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755529AbeASJEG (ORCPT ); Fri, 19 Jan 2018 04:04:06 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,381,1511856000"; d="scan'208";a="197007743" From: Rajneesh Bhardwaj To: platform-driver-x86@vger.kernel.org Cc: dvhart@infradead.org, andy@infradead.org, linux-kernel@vger.kernel.org, vishwanath.somayaji@intel.com, srinivas.pandruvada@linux.intel.com, Rajneesh Bhardwaj Subject: [Patch v1 4/8] platform/x86: intel_pmc_core: Read base address from LPIT Date: Fri, 19 Jan 2018 14:28:23 +0530 Message-Id: <1516352307-20123-5-git-send-email-rajneesh.bhardwaj@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1516352307-20123-1-git-send-email-rajneesh.bhardwaj@intel.com> References: <1516352307-20123-1-git-send-email-rajneesh.bhardwaj@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Srinivas Pandruvada Read SLP_S0 address from ACPI LPIT table when present and use PMC specific SLP_S0 offset to get the base address of PMC MMIO. Signed-off-by: Rajneesh Bhardwaj Signed-off-by: Srinivas Pandruvada --- drivers/platform/x86/intel_pmc_core.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/platform/x86/intel_pmc_core.c b/drivers/platform/x86/intel_pmc_core.c index f7616600e8ab..549ee5852d4f 100644 --- a/drivers/platform/x86/intel_pmc_core.c +++ b/drivers/platform/x86/intel_pmc_core.c @@ -20,6 +20,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include #include #include #include @@ -455,6 +456,7 @@ static int __init pmc_core_probe(void) { const struct x86_cpu_id *cpu_id; struct pmc_dev *pmcdev = &pmc; + u64 slp_s0_addr; int err; cpu_id = x86_match_cpu(intel_pmc_core_ids); @@ -462,7 +464,12 @@ static int __init pmc_core_probe(void) return -ENODEV; pmcdev->map = (struct pmc_reg_map *)cpu_id->driver_data; - pmcdev->base_addr = PMC_BASE_ADDR_DEFAULT; + + if (lpit_read_residency_count_address(&slp_s0_addr)) + pmcdev->base_addr = PMC_BASE_ADDR_DEFAULT; + else + pmcdev->base_addr = slp_s0_addr - pmcdev->map->slp_s0_offset; + pmcdev->regbase = ioremap(pmcdev->base_addr, pmcdev->map->regmap_length); if (!pmcdev->regbase) -- 2.7.4