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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2026-02-23 18:30:21 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2026-02-26 20:47:52 +0300 |
| commit | 2a78e42104444f948698f1225deaf515e9b7224d (patch) | |
| tree | e0b89a26be6bc0c7e59c59f3353408f032e2453c /include/linux | |
| parent | 1ae2f435350ec05224a39995c3a680aa6fdae5a5 (diff) | |
| download | linux-2a78e42104444f948698f1225deaf515e9b7224d.tar.xz | |
ACPI: x86/rtc-cmos: Use platform device for driver binding
Modify the rtc-cmos driver to bind to a platform device on systems with
ACPI via acpi_match_table and advertise the CMOST RTC ACPI device IDs
for driver auto-loading. Note that adding the requisite device IDs to
it and exposing them via MODULE_DEVICE_TABLE() is sufficient for this
purpose.
Since the ACPI device IDs in question are the same as for the CMOS RTC
ACPI scan handler, put them into a common header file and use the
definition from there in both places.
Additionally, to prevent a PNP device from being created for the CMOS
RTC if a platform one is present already, make is_cmos_rtc_device()
check cmos_rtc_platform_device_present introduced previously.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://patch.msgid.link/13969123.uLZWGnKmhe@rafael.j.wysocki
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/acpi.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 2bdb801cee01..5ecdcdaf31aa 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -791,6 +791,12 @@ const char *acpi_get_subsystem_id(acpi_handle handle); int acpi_mrrm_max_mem_region(void); #endif +#define ACPI_CMOS_RTC_IDS \ + { "PNP0B00", }, \ + { "PNP0B01", }, \ + { "PNP0B02", }, \ + { "", } + extern bool cmos_rtc_platform_device_present; #else /* !CONFIG_ACPI */ |