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thermal/intel/intel_tcc_cooling: Use Intel TCC library

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Cleanup the code by using Intel TCC library for TCC (Thermal Control
Circuitry) MSR access.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Zhang Rui 2022-12-19 23:46:18 +08:00 committed by Rafael J. Wysocki
parent 955fb8719e
commit 4e3ecc2898
2 changed files with 9 additions and 29 deletions
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1
drivers/thermal/intel/Kconfig
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@ -88,6 +88,7 @@ config INTEL_PCH_THERMAL
config INTEL_TCC_COOLING
tristate "Intel TCC offset cooling Driver"
depends on X86
select INTEL_TCC
help
Enable this to support system cooling by adjusting the effective TCC
activation temperature via the TCC Offset register, which is widely

37
drivers/thermal/intel/intel_tcc_cooling.c
View File

@ -7,12 +7,11 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/device.h>
#include <linux/intel_tcc.h>
#include <linux/module.h>
#include <linux/thermal.h>
#include <asm/cpu_device_id.h>
#define TCC_SHIFT 24
#define TCC_MASK (0x3fULL<<24)
#define TCC_PROGRAMMABLE BIT(30)
#define TCC_LOCKED BIT(31)
@ -21,47 +20,26 @@ static struct thermal_cooling_device *tcc_cdev;
static int tcc_get_max_state(struct thermal_cooling_device *cdev, unsigned long
*state)
{
*state = TCC_MASK >> TCC_SHIFT;
return 0;
}
static int tcc_offset_update(int tcc)
{
u64 val;
int err;
err = rdmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, &val);
if (err)
return err;
val &= ~TCC_MASK;
val |= tcc << TCC_SHIFT;
err = wrmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, val);
if (err)
return err;
*state = 0x3f;
return 0;
}
static int tcc_get_cur_state(struct thermal_cooling_device *cdev, unsigned long
*state)
{
u64 val;
int err;
int offset = intel_tcc_get_offset(-1);
err = rdmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, &val);
if (err)
return err;
if (offset < 0)
return offset;
*state = (val & TCC_MASK) >> TCC_SHIFT;
*state = offset;
return 0;
}
static int tcc_set_cur_state(struct thermal_cooling_device *cdev, unsigned long
state)
{
return tcc_offset_update(state);
return intel_tcc_set_offset(-1, (int)state);
}
static const struct thermal_cooling_device_ops tcc_cooling_ops = {
@ -140,6 +118,7 @@ static void __exit tcc_cooling_exit(void)
module_exit(tcc_cooling_exit)
MODULE_IMPORT_NS(INTEL_TCC);
MODULE_DESCRIPTION("TCC offset cooling device Driver");
MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>");
MODULE_LICENSE("GPL v2");