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thermal/drivers/core: Add init section table for self-encapsulation

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Currently the governors are declared in their respective files but they
export their [un]register functions which in turn call the [un]register
governors core's functions. That implies a cyclic dependency which is
not desirable. There is a way to self-encapsulate the governors by letting
them to declare themselves in a __init section table.

Define the table in the asm generic linker description like the other
tables and provide the specific macros to deal with.

Reviewed-by: Amit Kucheria <[email protected]>
Signed-off-by: Daniel Lezcano <[email protected]>
Signed-off-by: Zhang Rui <[email protected]>
This commit is contained in:
Daniel Lezcano 2019-06-12 22:13:24 +02:00 • committed by Zhang Rui
commit 980af75ede
2 changed files with 26 additions and 0 deletions
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15
drivers/thermal/thermal_core.h
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@ -15,6 +15,21 @@
/* Initial state of a cooling device during binding */
#define THERMAL_NO_TARGET -1UL
/* Init section thermal table */
extern struct thermal_governor *__governor_thermal_table[];
extern struct thermal_governor *__governor_thermal_table_end[];
#define THERMAL_TABLE_ENTRY(table, name) \
static typeof(name) *__thermal_table_entry_##name \
__used __section(__##table##_thermal_table) = &name
#define THERMAL_GOVERNOR_DECLARE(name) THERMAL_TABLE_ENTRY(governor, name)
#define for_each_governor_table(__governor) \
for (__governor = __governor_thermal_table; \
__governor < __governor_thermal_table_end; \
__governor++)
/*
* This structure is used to describe the behavior of
* a certain cooling device on a certain trip point