msm: thermal: Simplify kernel thermal safeguard mechanism
Using CPUFreq policy objects and setting the max frequency limit by
overriding the policy->max node, leads to race/overwrite conditions with
an user trying to use the scaling_max_frequency node.
The thermal limits are directly communicated to the 'msm' cpufreq driver
and use the cpufreq_update_policy() to ensure that the frequency is
limited as per the thermal safeguard requirements.
CRs-fixed: 370343
Change-Id: Iab5a15e0f0d25da4b9f6a9417dbfc01bf5d6f8f6
Signed-off-by: Praveen Chidambaram <pchidamb@codeaurora.org>
diff --git a/include/linux/msm_thermal.h b/include/linux/msm_thermal.h
new file mode 100644
index 0000000..fe9be89
--- /dev/null
+++ b/include/linux/msm_thermal.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2012, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MSM_THERMAL_H
+#define __MSM_THERMAL_H
+
+struct msm_thermal_data {
+ uint32_t sensor_id;
+ uint32_t poll_ms;
+ uint32_t limit_temp;
+ uint32_t temp_hysteresis;
+ uint32_t limit_freq;
+};
+
+#ifdef CONFIG_THERMAL_MONITOR
+extern int msm_thermal_init(struct msm_thermal_data *pdata);
+#else
+static inline int msm_thermal_init(struct msm_thermal_data *pdata)
+{
+ return -ENOSYS;
+}
+#endif
+
+#endif /*__MSM_THERMAL_H*/