[PATCH 3/6] thermal/intel/intel_soc_dts_iosf: Use Intel TCC library

[Zhang Rui <rui.zhang@intel.com>]

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

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
---
 drivers/thermal/intel/Kconfig              |  1 +
 drivers/thermal/intel/intel_soc_dts_iosf.c | 33 ++++------------------
 2 files changed, 6 insertions(+), 28 deletions(-)

diff --git a/drivers/thermal/intel/Kconfig b/drivers/thermal/intel/Kconfig
index 6b938c040d6e..329c0ee934c4 100644
--- a/drivers/thermal/intel/Kconfig
+++ b/drivers/thermal/intel/Kconfig
@@ -32,6 +32,7 @@ config INTEL_SOC_DTS_IOSF_CORE
 	tristate
 	depends on X86 && PCI
 	select IOSF_MBI
+	select INTEL_TCC
 	help
 	  This is becoming a common feature for Intel SoCs to expose the additional
 	  digital temperature sensors (DTSs) using side band interface (IOSF). This
diff --git a/drivers/thermal/intel/intel_soc_dts_iosf.c b/drivers/thermal/intel/intel_soc_dts_iosf.c
index 342b0bb5a56d..87fc45b8f8c6 100644
--- a/drivers/thermal/intel/intel_soc_dts_iosf.c
+++ b/drivers/thermal/intel/intel_soc_dts_iosf.c
@@ -7,6 +7,7 @@
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
 #include <linux/bitops.h>
+#include <linux/intel_tcc.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/interrupt.h>
@@ -45,32 +46,6 @@
 /* DTS0 and DTS 1 */
 #define SOC_MAX_DTS_SENSORS		2
 
-static int get_tj_max(u32 *tj_max)
-{
-	u32 eax, edx;
-	u32 val;
-	int err;
-
-	err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
-	if (err)
-		goto err_ret;
-	else {
-		val = (eax >> 16) & 0xff;
-		if (val)
-			*tj_max = val * 1000;
-		else {
-			err = -EINVAL;
-			goto err_ret;
-		}
-	}
-
-	return 0;
-err_ret:
-	*tj_max = 0;
-
-	return err;
-}
-
 static int sys_get_trip_temp(struct thermal_zone_device *tzd, int trip,
 			     int *temp)
 {
@@ -415,8 +390,9 @@ struct intel_soc_dts_sensors *intel_soc_dts_iosf_init(
 	if (!trip_count || read_only_trip_count > trip_count)
 		return ERR_PTR(-EINVAL);
 
-	if (get_tj_max(&tj_max))
-		return ERR_PTR(-EINVAL);
+	ret = intel_tcc_get_tjmax(cpumask_any(cpu_online_mask), &tj_max);
+	if (ret)
+		return ERR_PTR(ret);
 
 	sensors = kzalloc(sizeof(*sensors), GFP_KERNEL);
 	if (!sensors)
@@ -475,4 +451,5 @@ void intel_soc_dts_iosf_exit(struct intel_soc_dts_sensors *sensors)
 }
 EXPORT_SYMBOL_GPL(intel_soc_dts_iosf_exit);
 
+MODULE_IMPORT_NS(INTEL_TCC);
 MODULE_LICENSE("GPL v2");
-- 
2.25.1