arm: tegra: thermal: Added thermal debugfs nodes

Added nodes which can set/get tc1, tc2, passive
delay, shutdown temp, and throttle temp.

Change-Id: I433bb09f9bf42cdbc7112fc98fa4ae88ca7e1de8
Signed-off-by: Joshua Primero <jprimero@nvidia.com>
Reviewed-on: http://git-master/r/70930
Reviewed-by: Rohan Somvanshi <rsomvanshi@nvidia.com>
Tested-by: Rohan Somvanshi <rsomvanshi@nvidia.com>

Rebase-Id: R9f568e677c0e36089bc58e90b1a844228f8b1240

1 files changed, 191 insertions, 5 deletions

diff --git a/arch/arm/mach-tegra/tegra3_thermal.c b/arch/arm/mach-tegra/tegra3_thermal.c
index 16bf6551c5e9..be4e7c09c806 100644
--- a/arch/arm/mach-tegra/tegra3_thermal.c
+++ b/arch/arm/mach-tegra/tegra3_thermal.c
@@ -52,6 +52,7 @@ struct tegra_thermal {
 	long edp_offset;
 	long hysteresis_edp;
 #endif
+	struct mutex mutex;
 };
 
 static struct tegra_thermal thermal_state = {
@@ -63,7 +64,6 @@ static struct tegra_thermal thermal_state = {
 
 #ifndef CONFIG_TEGRA_THERMAL_SYSFS
 static bool throttle_enb;
-struct mutex mutex;
 #endif
 
 #ifdef CONFIG_TEGRA_EDP_LIMITS
@@ -158,10 +158,10 @@ static struct thermal_zone_device_ops tegra_thermal_zone_ops = {
 static void tegra_therm_throttle(bool enable)
 {
 	if (throttle_enb != enable) {
-		mutex_lock(&mutex);
+		mutex_lock(&thermal_state.mutex);
 		tegra_throttling_enable(enable);
 		throttle_enb = enable;
-		mutex_unlock(&mutex);
+		mutex_unlock(&thermal_state.mutex);
 	}
 }
 #endif
@@ -184,6 +184,8 @@ void tegra_thermal_alert(void *data)
 	if (thermal != &thermal_state)
 		BUG();
 
+	mutex_lock(&thermal_state.mutex);
+
 #ifdef CONFIG_TEGRA_THERMAL_SYSFS
 	if (thermal->thz) {
 		if (!thermal->thz->passive)
@@ -194,7 +196,7 @@ void tegra_thermal_alert(void *data)
 	err = thermal->device->get_temp(thermal->device->data, &temp_dev);
 	if (err) {
 		pr_err("%s: get temp fail(%d)", __func__, err);
-		return;
+		goto done;
 	}
 
 	/* Convert all temps to tj and then do all work/logic in terms of
@@ -276,6 +278,9 @@ void tegra_thermal_alert(void *data)
 
 	thermal->edp_thermal_zone_val = temp_tj;
 #endif
+
+done:
+	mutex_unlock(&thermal_state.mutex);
 }
 
 int tegra_thermal_set_device(struct tegra_thermal_device *device)
@@ -327,11 +332,11 @@ int __init tegra_thermal_init(struct tegra_thermal_data *data)
 	thermal_state.tc2 = data->tc2;
 	thermal_state.passive_delay = data->passive_delay;
 #else
-	mutex_init(&mutex);
 	thermal_state.temp_throttle_low_tj = data->temp_throttle +
 						data->temp_offset -
 						data->hysteresis_throttle;
 #endif
+	mutex_init(&thermal_state.mutex);
 #ifdef CONFIG_TEGRA_EDP_LIMITS
 	thermal_state.edp_offset = data->edp_offset;
 	thermal_state.hysteresis_edp = data->hysteresis_edp;
@@ -353,3 +358,184 @@ int tegra_thermal_exit(void)
 
 	return 0;
 }
+
+#ifdef CONFIG_DEBUG_FS
+
+static int tegra_thermal_throttle_temp_tj_set(void *data, u64 val)
+{
+#ifndef CONFIG_TEGRA_THERMAL_SYSFS
+	long throttle_hysteresis = thermal_state.temp_throttle_tj -
+					thermal_state.temp_throttle_low_tj;
+#endif
+
+	mutex_lock(&thermal_state.mutex);
+	thermal_state.temp_throttle_tj = val;
+#ifndef CONFIG_TEGRA_THERMAL_SYSFS
+	thermal_state.temp_throttle_low_tj = thermal_state.temp_throttle_tj -
+						throttle_hysteresis;
+#endif
+	mutex_unlock(&thermal_state.mutex);
+
+	tegra_thermal_alert(&thermal_state);
+
+	return 0;
+}
+
+static int tegra_thermal_throttle_temp_tj_get(void *data, u64 *val)
+{
+	*val = (u64)thermal_state.temp_throttle_tj;
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(throttle_temp_tj_fops,
+			tegra_thermal_throttle_temp_tj_get,
+			tegra_thermal_throttle_temp_tj_set,
+			"%llu\n");
+
+static int tegra_thermal_shutdown_temp_tj_set(void *data, u64 val)
+{
+	thermal_state.temp_shutdown_tj = val;
+
+	if (thermal_state.device)
+		thermal_state.device->set_shutdown_temp(
+				thermal_state.device->data,
+				tj2dev(thermal_state.device,
+					thermal_state.temp_shutdown_tj));
+
+	tegra_thermal_alert(&thermal_state);
+
+	return 0;
+}
+
+static int tegra_thermal_shutdown_temp_tj_get(void *data, u64 *val)
+{
+	*val = (u64)thermal_state.temp_shutdown_tj;
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(shutdown_temp_tj_fops,
+			tegra_thermal_shutdown_temp_tj_get,
+			tegra_thermal_shutdown_temp_tj_set,
+			"%llu\n");
+
+
+static int tegra_thermal_temp_tj_get(void *data, u64 *val)
+{
+	long temp_tj, temp_dev;
+
+	if (thermal_state.device) {
+		thermal_state.device->get_temp(thermal_state.device->data,
+						&temp_dev);
+
+		/* Convert all temps to tj and then do all work/logic in
+		   terms of tj in order to avoid confusion */
+		temp_tj = dev2tj(thermal_state.device, temp_dev);
+	} else {
+		temp_tj = -1;
+	}
+
+	*val = (u64)temp_tj;
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(temp_tj_fops,
+			tegra_thermal_temp_tj_get,
+			NULL,
+			"%llu\n");
+
+#ifdef CONFIG_TEGRA_THERMAL_SYSFS
+static int tegra_thermal_tc1_set(void *data, u64 val)
+{
+	thermal_state.thz->tc1 = val;
+	return 0;
+}
+
+static int tegra_thermal_tc1_get(void *data, u64 *val)
+{
+	*val = (u64)thermal_state.thz->tc1;
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(tc1_fops,
+			tegra_thermal_tc1_get,
+			tegra_thermal_tc1_set,
+			"%llu\n");
+
+static int tegra_thermal_tc2_set(void *data, u64 val)
+{
+	thermal_state.thz->tc2 = val;
+	return 0;
+}
+
+static int tegra_thermal_tc2_get(void *data, u64 *val)
+{
+	*val = (u64)thermal_state.thz->tc2;
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(tc2_fops,
+			tegra_thermal_tc2_get,
+			tegra_thermal_tc2_set,
+			"%llu\n");
+
+static int tegra_thermal_passive_delay_set(void *data, u64 val)
+{
+	thermal_state.thz->passive_delay = val;
+	return 0;
+}
+
+static int tegra_thermal_passive_delay_get(void *data, u64 *val)
+{
+	*val = (u64)thermal_state.thz->passive_delay;
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(passive_delay_fops,
+			tegra_thermal_passive_delay_get,
+			tegra_thermal_passive_delay_set,
+			"%llu\n");
+#endif
+
+
+static struct dentry *thermal_debugfs_root;
+
+static int __init tegra_thermal_debug_init(void)
+{
+	thermal_debugfs_root = debugfs_create_dir("tegra_thermal", 0);
+
+	if (!debugfs_create_file("throttle_temp_tj", 0644, thermal_debugfs_root,
+				 NULL, &throttle_temp_tj_fops))
+		goto err_out;
+
+	if (!debugfs_create_file("shutdown_temp_tj", 0644, thermal_debugfs_root,
+				 NULL, &shutdown_temp_tj_fops))
+		goto err_out;
+
+	if (!debugfs_create_file("temp_tj", 0644, thermal_debugfs_root,
+				 NULL, &temp_tj_fops))
+		goto err_out;
+
+#ifdef CONFIG_TEGRA_THERMAL_SYSFS
+	if (!debugfs_create_file("tc1", 0644, thermal_debugfs_root,
+				 NULL, &tc1_fops))
+		goto err_out;
+
+	if (!debugfs_create_file("tc2", 0644, thermal_debugfs_root,
+				 NULL, &tc2_fops))
+		goto err_out;
+
+	if (!debugfs_create_file("passive_delay", 0644, thermal_debugfs_root,
+				 NULL, &passive_delay_fops))
+		goto err_out;
+#endif
+
+	return 0;
+
+err_out:
+	debugfs_remove_recursive(thermal_debugfs_root);
+	return -ENOMEM;
+}
+
+late_initcall(tegra_thermal_debug_init);
+#endif