diff options
| author |   Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2018-02-02 19:13:34 +0530 |
|---|---|---|
| committer |   Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2018-02-04 15:55:52 +0200 |
| commit | 745698c37c08f48fb5ad3c0cb7ee955bd5701d4a (patch) | |
| tree | dce09bb8a4679ee5b6bb80515c9dc065ae14e11c /drivers/platform | |
| parent | ACPI / LPIT: Export lpit_read_residency_count_address() (diff) | |
| download | linux-dev-745698c37c08f48fb5ad3c0cb7ee955bd5701d4a.tar.xz linux-dev-745698c37c08f48fb5ad3c0cb7ee955bd5701d4a.zip | |
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 <rajneesh.bhardwaj@intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/intel_pmc_core.c | 9 |
1 files changed, 8 insertions, 1 deletions
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 <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; - 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) |