diff options
| author | Sunil V L <sunilvl@ventanamicro.com> | 2024-08-12 06:29:18 +0530 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2024-08-27 15:48:35 +0200 |
| commit | 8cf252737b418c311d1016b0a7956407a235bb8d (patch) | |
| tree | 2b33ec6c3eb436412c9289ee90512be968ee9f58 | |
| parent | 15f210f43e95ffaf87858c6d75339afeebbf8f5c (diff) | |
ACPI: scan: Define weak function to populate dependencies
Some architectures like RISC-V need to add dependencies without explicit
_DEP. Define a weak function which can be implemented by the architecture.
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://patch.msgid.link/20240812005929.113499-7-sunilvl@ventanamicro.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/acpi/scan.c | 11 | ||||
| -rw-r--r-- | include/acpi/acpi_bus.h | 1 |
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 944bf4865287..98e55f287bdb 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -2077,12 +2077,23 @@ static void acpi_scan_init_hotplug(struct acpi_device *adev) } } +u32 __weak arch_acpi_add_auto_dep(acpi_handle handle) { return 0; } + static u32 acpi_scan_check_dep(acpi_handle handle) { struct acpi_handle_list dep_devices; u32 count = 0; /* + * Some architectures like RISC-V need to add dependencies for + * all devices which use GSI to the interrupt controller so that + * interrupt controller is probed before any of those devices. + * Instead of mandating _DEP on all the devices, detect the + * dependency and add automatically. + */ + count += arch_acpi_add_auto_dep(handle); + + /* * Check for _HID here to avoid deferring the enumeration of: * 1. PCI devices. * 2. ACPI nodes describing USB ports. diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index d6a4dd58e36f..af72a5d9de99 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -994,6 +994,7 @@ static inline void acpi_put_acpi_dev(struct acpi_device *adev) int acpi_wait_for_acpi_ipmi(void); int acpi_scan_add_dep(acpi_handle handle, struct acpi_handle_list *dep_devices); +u32 arch_acpi_add_auto_dep(acpi_handle handle); #else /* CONFIG_ACPI */ static inline int register_acpi_bus_type(void *bus) { return 0; } |