diff options
Diffstat (limited to 'drivers/thermal/intel/intel_tcc_cooling.c')
| -rw-r--r-- | drivers/thermal/intel/intel_tcc_cooling.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/thermal/intel/intel_tcc_cooling.c b/drivers/thermal/intel/intel_tcc_cooling.c index 95adac427b6f..c9e84e615fce 100644 --- a/drivers/thermal/intel/intel_tcc_cooling.c +++ b/drivers/thermal/intel/intel_tcc_cooling.c @@ -14,6 +14,7 @@ #define TCC_SHIFT 24 #define TCC_MASK (0x3fULL<<24) #define TCC_PROGRAMMABLE BIT(30) +#define TCC_LOCKED BIT(31) static struct thermal_cooling_device *tcc_cdev; @@ -108,6 +109,15 @@ static int __init tcc_cooling_init(void) if (!(val & TCC_PROGRAMMABLE)) return -ENODEV; + err = rdmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, &val); + if (err) + return err; + + if (val & TCC_LOCKED) { + pr_info("TCC Offset locked\n"); + return -ENODEV; + } + pr_info("Programmable TCC Offset detected\n"); tcc_cdev = |