From ed93b71492da3464b4798613aa8a99bed914251b Mon Sep 17 00:00:00 2001 From: Jacob Pan Date: Wed, 11 Dec 2013 14:39:27 -0800 Subject: powercap / RAPL: add support for ValleyView Soc This patch adds support for RAPL on Intel ValleyView based SoC platforms, such as Baytrail. Besides adding CPU ID, special energy unit encoding is handled for ValleyView. Signed-off-by: Jacob Pan Signed-off-by: Rafael J. Wysocki diff --git a/drivers/powercap/intel_rapl.c b/drivers/powercap/intel_rapl.c index 2a786c5..3c67683 100644 --- a/drivers/powercap/intel_rapl.c +++ b/drivers/powercap/intel_rapl.c @@ -833,6 +833,11 @@ static int rapl_write_data_raw(struct rapl_domain *rd, return 0; } +static const struct x86_cpu_id energy_unit_quirk_ids[] = { + { X86_VENDOR_INTEL, 6, 0x37},/* VLV */ + {} +}; + static int rapl_check_unit(struct rapl_package *rp, int cpu) { u64 msr_val; @@ -853,8 +858,11 @@ static int rapl_check_unit(struct rapl_package *rp, int cpu) * time unit: 1/time_unit_divisor Seconds */ value = (msr_val & ENERGY_UNIT_MASK) >> ENERGY_UNIT_OFFSET; - rp->energy_unit_divisor = 1 << value; - + /* some CPUs have different way to calculate energy unit */ + if (x86_match_cpu(energy_unit_quirk_ids)) + rp->energy_unit_divisor = 1000000 / (1 << value); + else + rp->energy_unit_divisor = 1 << value; value = (msr_val & POWER_UNIT_MASK) >> POWER_UNIT_OFFSET; rp->power_unit_divisor = 1 << value; @@ -941,6 +949,7 @@ static void package_power_limit_irq_restore(int package_id) static const struct x86_cpu_id rapl_ids[] = { { X86_VENDOR_INTEL, 6, 0x2a},/* SNB */ { X86_VENDOR_INTEL, 6, 0x2d},/* SNB EP */ + { X86_VENDOR_INTEL, 6, 0x37},/* VLV */ { X86_VENDOR_INTEL, 6, 0x3a},/* IVB */ { X86_VENDOR_INTEL, 6, 0x45},/* HSW */ /* TODO: Add more CPU IDs after testing */ -- cgit v0.10.2