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regmap: introduce value tracing for regmap bulk operations

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Currently, only one-register io operations support tracepoints with
value logging. For the regmap bulk operations developer can view
hw_start/hw_done tracepoints with starting reg number and registers
count to be reading or writing. This patch injects tracepoints with
dumping registers values in the hex format to regmap bulk reading
and writing.

Signed-off-by: Dmitry Rokosov <ddrokosov@sberdevices.ru>
Link: https://lore.kernel.org/r/20220816181451.5628-1-ddrokosov@sberdevices.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Dmitry Rokosov 2022-08-16 18:14:48 +00:00 committed by Mark Brown
parent f8f6061537
commit 026c99b508
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 50 additions and 0 deletions
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7
drivers/base/regmap/regmap.c
View File

@ -2448,6 +2448,10 @@ out:
kfree(wval);
}
if (!ret)
trace_regmap_bulk_write(map, reg, val, val_bytes * val_count);
return ret;
}
EXPORT_SYMBOL_GPL(regmap_bulk_write);
@ -3209,6 +3213,9 @@ out:
map->unlock(map->lock_arg);
}
if (!ret)
trace_regmap_bulk_read(map, reg, val, val_bytes * val_count);
return ret;
}
EXPORT_SYMBOL_GPL(regmap_bulk_read);

43
drivers/base/regmap/trace.h
View File

@ -64,6 +64,49 @@ DEFINE_EVENT(regmap_reg, regmap_reg_read_cache,
);
DECLARE_EVENT_CLASS(regmap_bulk,
TP_PROTO(struct regmap *map, unsigned int reg,
const void *val, int val_len),
TP_ARGS(map, reg, val, val_len),
TP_STRUCT__entry(
__string(name, regmap_name(map))
__field(unsigned int, reg)
__dynamic_array(char, buf, val_len)
__field(int, val_len)
),
TP_fast_assign(
__assign_str(name, regmap_name(map));
__entry->reg = reg;
__entry->val_len = val_len;
if (val)
memcpy(__get_dynamic_array(buf), val, val_len);
),
TP_printk("%s reg=%x val=%s", __get_str(name),
(unsigned int)__entry->reg,
__print_hex(__get_dynamic_array(buf), __entry->val_len))
);
DEFINE_EVENT(regmap_bulk, regmap_bulk_write,
TP_PROTO(struct regmap *map, unsigned int reg,
const void *val, int val_len),
TP_ARGS(map, reg, val, val_len)
);
DEFINE_EVENT(regmap_bulk, regmap_bulk_read,
TP_PROTO(struct regmap *map, unsigned int reg,
const void *val, int val_len),
TP_ARGS(map, reg, val, val_len)
);
DECLARE_EVENT_CLASS(regmap_block,
TP_PROTO(struct regmap *map, unsigned int reg, int count),