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powercap / RAPL: add support for ValleyView Soc

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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 <jacob.jun.pan@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Jacob Pan 2013-12-11 14:39:27 -08:00 committed by Rafael J. Wysocki
parent 319e2e3f63
commit ed93b71492
1 changed files with 11 additions and 2 deletions
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13
drivers/powercap/intel_rapl.c
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@ -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 */