diff --git a/MAINTAINERS b/MAINTAINERS index c0ca7f74f8e8..20a64eb40b55 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6454,6 +6454,7 @@ F: Documentation/devicetree/bindings/hwmon/ F: Documentation/hwmon/ F: drivers/hwmon/ F: include/linux/hwmon*.h +F: include/trace/events/hwmon*.h HARDWARE RANDOM NUMBER GENERATOR CORE M: Matt Mackall diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c index ac1cdf88840f..975c95169884 100644 --- a/drivers/hwmon/hwmon.c +++ b/drivers/hwmon/hwmon.c @@ -24,6 +24,9 @@ #include #include +#define CREATE_TRACE_POINTS +#include + #define HWMON_ID_PREFIX "hwmon" #define HWMON_ID_FORMAT HWMON_ID_PREFIX "%d" @@ -171,6 +174,13 @@ static int hwmon_thermal_add_sensor(struct device *dev, } #endif /* IS_REACHABLE(CONFIG_THERMAL) && ... */ +static int hwmon_attr_base(enum hwmon_sensor_types type) +{ + if (type == hwmon_in) + return 0; + return 1; +} + /* sysfs attribute management */ static ssize_t hwmon_attr_show(struct device *dev, @@ -185,6 +195,9 @@ static ssize_t hwmon_attr_show(struct device *dev, if (ret < 0) return ret; + trace_hwmon_attr_show(hattr->index + hwmon_attr_base(hattr->type), + hattr->name, val); + return sprintf(buf, "%ld\n", val); } @@ -193,6 +206,7 @@ static ssize_t hwmon_attr_show_string(struct device *dev, char *buf) { struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); + enum hwmon_sensor_types type = hattr->type; const char *s; int ret; @@ -201,6 +215,9 @@ static ssize_t hwmon_attr_show_string(struct device *dev, if (ret < 0) return ret; + trace_hwmon_attr_show_string(hattr->index + hwmon_attr_base(type), + hattr->name, s); + return sprintf(buf, "%s\n", s); } @@ -221,14 +238,10 @@ static ssize_t hwmon_attr_store(struct device *dev, if (ret < 0) return ret; - return count; -} + trace_hwmon_attr_store(hattr->index + hwmon_attr_base(hattr->type), + hattr->name, val); -static int hwmon_attr_base(enum hwmon_sensor_types type) -{ - if (type == hwmon_in) - return 0; - return 1; + return count; } static bool is_string_attr(enum hwmon_sensor_types type, u32 attr) diff --git a/include/trace/events/hwmon.h b/include/trace/events/hwmon.h new file mode 100644 index 000000000000..d7a1d0ffb679 --- /dev/null +++ b/include/trace/events/hwmon.h @@ -0,0 +1,71 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM hwmon + +#if !defined(_TRACE_HWMON_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_HWMON_H + +#include + +DECLARE_EVENT_CLASS(hwmon_attr_class, + + TP_PROTO(int index, const char *attr_name, long val), + + TP_ARGS(index, attr_name, val), + + TP_STRUCT__entry( + __field(int, index) + __string(attr_name, attr_name) + __field(long, val) + ), + + TP_fast_assign( + __entry->index = index; + __assign_str(attr_name, attr_name); + __entry->val = val; + ), + + TP_printk("index=%d, attr_name=%s, val=%ld", + __entry->index, __get_str(attr_name), __entry->val) +); + +DEFINE_EVENT(hwmon_attr_class, hwmon_attr_show, + + TP_PROTO(int index, const char *attr_name, long val), + + TP_ARGS(index, attr_name, val) +); + +DEFINE_EVENT(hwmon_attr_class, hwmon_attr_store, + + TP_PROTO(int index, const char *attr_name, long val), + + TP_ARGS(index, attr_name, val) +); + +TRACE_EVENT(hwmon_attr_show_string, + + TP_PROTO(int index, const char *attr_name, const char *s), + + TP_ARGS(index, attr_name, s), + + TP_STRUCT__entry( + __field(int, index) + __string(attr_name, attr_name) + __string(label, s) + ), + + TP_fast_assign( + __entry->index = index; + __assign_str(attr_name, attr_name); + __assign_str(label, s); + ), + + TP_printk("index=%d, attr_name=%s, val=%s", + __entry->index, __get_str(attr_name), __get_str(label)) +); + +#endif /* _TRACE_HWMON_H */ + +/* This part must be outside protection */ +#include