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Commit 745698c3 authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Andy Shevchenko
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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: default avatarRajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
parent 9383bbad

drivers/platform/x86/intel_pmc_core.c

+8 −1
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt



#include <linux/acpi.h>

#include <linux/debugfs.h>

#include <linux/delay.h>

#include <linux/io.h>
@@ -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;



	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)