soc: rockchip: system_monitor: Add wide-temperature control

Change-Id: I5c1f502f8602c011a9bb26e7e0425e60728f1b66
Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>

1 files changed, 102 insertions, 0 deletions

diff --git a/include/soc/rockchip/rockchip_system_monitor.h b/include/soc/rockchip/rockchip_system_monitor.h
new file mode 100644
index 000000000000..4a5f1dbe9e53
--- /dev/null
+++ b/include/soc/rockchip/rockchip_system_monitor.h
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
+/*
+ * Copyright (C) 2019, Fuzhou Rockchip Electronics Co., Ltd
+ */
+
+#ifndef __SOC_ROCKCHIP_SYSTEM_MONITOR_H
+#define __SOC_ROCKCHIP_SYSTEM_MONITOR_H
+
+enum monitor_dev_type {
+	MONITOR_TPYE_CPU = 0,	/* CPU */
+	MONITOR_TPYE_DEV,	/* GPU, NPU, DMC, and so on */
+};
+
+struct volt_adjust_table {
+	unsigned int min;	/* Minimum frequency in MHz */
+	unsigned int max;	/* Maximum frequency in MHz */
+	int volt;		/* Voltage in microvolt */
+};
+
+/**
+ * struct temp_opp_table - System monitor device OPP description structure
+ * @rate:		Frequency in hertz
+ * @volt:		Target voltage in microvolt
+ * @low_temp_volt:	Target voltage when low temperature, in microvolt
+ * @max_volt:		Maximum voltage in microvolt
+ */
+struct temp_opp_table {
+	unsigned long rate;
+	unsigned long volt;
+	unsigned long low_temp_volt;
+	unsigned long max_volt;
+};
+
+/**
+ * struct monitor_dev_info - structure for a system monitor device
+ * @dev:		Device registered by system monitor
+ * @devfreq_nb:		Notifier block used to notify devfreq object
+ *			that it should reevaluate operable frequencies
+ * @low_temp_adjust_table:	Voltage margin for different OPPs when lowe
+ *				temperature
+ * @opp_table:		Frequency and voltage information of device
+ * @devp:		Device-specific system monitor profile
+ * @node:		Node in monitor_dev_list
+ * @low_limit:		Limit maximum frequency when low temperature, in Hz
+ * @high_limit:		Limit maximum frequency when high temperature, in Hz
+ * @max_volt:		Maximum voltage in microvolt
+ * @low_temp_min_volt:	Minimum voltage of OPPs when low temperature, in
+ *			microvolt
+ * @high_temp_max_volt:	Maximum voltage when high temperature, in microvolt
+ * @wide_temp_limit:	Target maximum frequency when low or high temperature,
+ *			in Hz
+ * @low_temp:		Low temperature trip point, in millicelsius
+ * @high_temp:		High temperature trip point, in millicelsius
+ * @temp_hysteresis:	A low hysteresis value on low_temp, in millicelsius
+ * @is_low_temp:	True if current temperature less than low_temp
+ * @is_high_temp:	True if current temperature greater than high_temp
+ * @is_low_temp_enabled:	True if device node contains low temperature
+ *				configuration
+ */
+struct monitor_dev_info {
+	struct device *dev;
+	struct notifier_block devfreq_nb;
+	struct volt_adjust_table *low_temp_adjust_table;
+	struct temp_opp_table *opp_table;
+	struct monitor_dev_profile *devp;
+	struct list_head node;
+	unsigned long low_limit;
+	unsigned long high_limit;
+	unsigned long max_volt;
+	unsigned long low_temp_min_volt;
+	unsigned long high_temp_max_volt;
+	unsigned long wide_temp_limit;
+	int low_temp;
+	int high_temp;
+	int temp_hysteresis;
+	bool is_low_temp;
+	bool is_high_temp;
+	bool is_low_temp_enabled;
+};
+
+struct monitor_dev_profile {
+	enum monitor_dev_type type;
+	void *data;
+	int (*low_temp_adjust)(struct monitor_dev_info *info, bool is_low);
+	int (*high_temp_adjust)(struct monitor_dev_info *info, bool is_low);
+	struct cpumask allowed_cpus;
+};
+
+struct monitor_dev_info *
+rockchip_system_monitor_register(struct device *dev,
+				 struct monitor_dev_profile *devp);
+void rockchip_system_monitor_unregister(struct monitor_dev_info *info);
+int rockchip_monitor_cpu_low_temp_adjust(struct monitor_dev_info *info,
+					 bool is_low);
+int rockchip_monitor_cpu_high_temp_adjust(struct monitor_dev_info *info,
+					  bool is_high);
+int rockchip_monitor_dev_low_temp_adjust(struct monitor_dev_info *info,
+					 bool is_low);
+int rockchip_monitor_dev_high_temp_adjust(struct monitor_dev_info *info,
+					  bool is_high);
+int rockchip_monitor_suspend_low_temp_adjust(struct monitor_dev_info *info);
+#endif