From 745698c37c08f48fb5ad3c0cb7ee955bd5701d4a Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada Date: Fri, 2 Feb 2018 19:13:34 +0530 Subject: [PATCH] platform/x86: intel_pmc_core: Read base address from LPIT 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 Signed-off-by: Andy Shevchenko --- 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 5c401e17cfb6..bb80aed4c3c1 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) { struct pmc_dev *pmcdev = &pmc; const struct x86_cpu_id *cpu_id; + 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)