Commit 8cf25273 authored by Sunil V L's avatar Sunil V L Committed by Rafael J. Wysocki
Browse files

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: default avatarSunil V L <sunilvl@ventanamicro.com>
Tested-by: default avatarBjörn Töpel <bjorn@rivosinc.com>
Link: https://patch.msgid.link/20240812005929.113499-7-sunilvl@ventanamicro.com


Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 15f210f4

drivers/acpi/scan.c

+11 −0
Original line number Diff line number Diff line
@@ -2077,11 +2077,22 @@ 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.

include/acpi/acpi_bus.h

+1 −0
Original line number Diff line number Diff line
@@ -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; }