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| author |   Arnd Bergmann <arnd@arndb.de> | 2024-10-11 06:18:17 +0000 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2024-10-24 17:47:15 +0200 |
| commit | a6021aa24f6417416d93318bbfa022ab229c33c8 (patch) | |
| tree | f72102ddc495b81fbec8ca07791ad2a381eeaf74 /drivers/acpi/internal.h | |
| parent | Linux 6.12-rc4 (diff) | |
| download | linux-rng-a6021aa24f6417416d93318bbfa022ab229c33c8.tar.xz linux-rng-a6021aa24f6417416d93318bbfa022ab229c33c8.zip | |
ACPI: EC: make EC support compile-time conditional
The embedded controller code is mainly used on x86 laptops and cannot
work without PC style I/O port access.
Make this a user-visible configuration option that is default enabled
on x86 but otherwise disabled, and that can never be enabled unless
CONFIG_HAS_IOPORT is also available.
The empty stubs in internal.h help ignore the EC code in configurations
that don't support it. In order to see those stubs, the sbshc code also
has to include this header and drop duplicate declarations.
All the direct callers of ec_read/ec_write already had an x86
dependency and now also need to depend on APCI_EC.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patch.msgid.link/20241011061948.3211423-1-arnd@kernel.org
[ rjw: Subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/internal.h')
| -rw-r--r-- | drivers/acpi/internal.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index ced7dff9a5db..00910ccd7eda 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -215,6 +215,8 @@ extern struct acpi_ec *first_ec; /* External interfaces use first EC only, so remember */ typedef int (*acpi_ec_query_func) (void *data); +#ifdef CONFIG_ACPI_EC + void acpi_ec_init(void); void acpi_ec_ecdt_probe(void); void acpi_ec_dsdt_probe(void); @@ -231,6 +233,29 @@ void acpi_ec_flush_work(void); bool acpi_ec_dispatch_gpe(void); #endif +#else + +static inline void acpi_ec_init(void) {} +static inline void acpi_ec_ecdt_probe(void) {} +static inline void acpi_ec_dsdt_probe(void) {} +static inline void acpi_ec_block_transactions(void) {} +static inline void acpi_ec_unblock_transactions(void) {} +static inline int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit, + acpi_handle handle, acpi_ec_query_func func, + void *data) +{ + return -ENXIO; +} +static inline void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit) {} +static inline void acpi_ec_register_opregions(struct acpi_device *adev) {} + +static inline void acpi_ec_flush_work(void) {} +static inline bool acpi_ec_dispatch_gpe(void) +{ + return false; +} + +#endif /*-------------------------------------------------------------------------- Suspend/Resume |