thermal: Intel SoC DTS: Add Braswell support

Added Intel Braswell CPU id for SOC DTS. Since this doesn't support
APIC IRQ, the driver is modified to have capability to not register
any modifiable trips.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

drivers/thermal/intel_soc_dts_thermal.c

@@ -309,10 +309,13 @@ static int soc_dts_enable(int id)
 	return ret;
 }
 
-static struct soc_sensor_entry *alloc_soc_dts(int id, u32 tj_max)
+static struct soc_sensor_entry *alloc_soc_dts(int id, u32 tj_max,
+					      bool notification_support)
 {
 	struct soc_sensor_entry *aux_entry;
 	char name[10];
+	int trip_count = 0;
+	int trip_mask = 0;
 	int err;
 
 	aux_entry = kzalloc(sizeof(*aux_entry), GFP_KERNEL);
@@ -332,11 +335,16 @@ static struct soc_sensor_entry *alloc_soc_dts(int id, u32 tj_max)
 	aux_entry->tj_max = tj_max;
 	aux_entry->temp_mask = 0x00FF << (id * 8);
 	aux_entry->temp_shift = id * 8;
+	if (notification_support) {
+		trip_count = SOC_MAX_DTS_TRIPS;
+		trip_mask = 0x02;
+	}
 	snprintf(name, sizeof(name), "soc_dts%d", id);
 	aux_entry->tzone = thermal_zone_device_register(name,
-			SOC_MAX_DTS_TRIPS,
-			0x02,
-			aux_entry, &tzone_ops, NULL, 0, 0);
+							trip_count,
+							trip_mask,
+							aux_entry, &tzone_ops,
+							NULL, 0, 0);
 	if (IS_ERR(aux_entry->tzone)) {
 		err = PTR_ERR(aux_entry->tzone);
 		goto err_ret;
@@ -402,6 +410,7 @@ static irqreturn_t soc_irq_thread_fn(int irq, void *dev_data)
 
 static const struct x86_cpu_id soc_thermal_ids[] = {
 	{ X86_VENDOR_INTEL, X86_FAMILY_ANY, 0x37, 0, BYT_SOC_DTS_APIC_IRQ},
+	{ X86_VENDOR_INTEL, X86_FAMILY_ANY, 0x4c, 0, 0},
 	{}
 };
 MODULE_DEVICE_TABLE(x86cpu, soc_thermal_ids);
@@ -420,8 +429,11 @@ static int __init intel_soc_thermal_init(void)
 	if (get_tj_max(&tj_max))
 		return -EINVAL;
 
+	soc_dts_thres_irq = (int)match_cpu->driver_data;
+
 	for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
-		soc_dts[i] = alloc_soc_dts(i, tj_max);
+		soc_dts[i] = alloc_soc_dts(i, tj_max,
+					   soc_dts_thres_irq ? true : false);
 		if (IS_ERR(soc_dts[i])) {
 			err = PTR_ERR(soc_dts[i]);
 			goto err_free;
@@ -430,15 +442,15 @@ static int __init intel_soc_thermal_init(void)
 
 	spin_lock_init(&intr_notify_lock);
 
-	soc_dts_thres_irq = (int)match_cpu->driver_data;
-
-	err = request_threaded_irq(soc_dts_thres_irq, NULL,
-					soc_irq_thread_fn,
-					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
-					"soc_dts", soc_dts);
-	if (err) {
-		pr_err("request_threaded_irq ret %d\n", err);
-		goto err_free;
+	if (soc_dts_thres_irq) {
+		err = request_threaded_irq(soc_dts_thres_irq, NULL,
+					   soc_irq_thread_fn,
+					   IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					   "soc_dts", soc_dts);
+		if (err) {
+			pr_err("request_threaded_irq ret %d\n", err);
+			goto err_free;
+		}
 	}
 
 	for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
@@ -451,7 +463,8 @@ static int __init intel_soc_thermal_init(void)
 
 err_trip_temp:
 	i = SOC_MAX_DTS_SENSORS;
-	free_irq(soc_dts_thres_irq, soc_dts);
+	if (soc_dts_thres_irq)
+		free_irq(soc_dts_thres_irq, soc_dts);
 err_free:
 	while (--i >= 0)
 		free_soc_dts(soc_dts[i]);
@@ -466,7 +479,8 @@ static void __exit intel_soc_thermal_exit(void)
 	for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i)
 		update_trip_temp(soc_dts[i], 0, 0);
 
-	free_irq(soc_dts_thres_irq, soc_dts);
+	if (soc_dts_thres_irq)
+		free_irq(soc_dts_thres_irq, soc_dts);
 
 	for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i)
 		free_soc_dts(soc_dts[i]);