mirror of
git://git.yoctoproject.org/linux-yocto.git
synced 2025-10-22 23:13:01 +02:00
Documentation: ACPI: Fix parent device references
commite65cb01134
upstream. The _CRS resources in many cases want to have ResourceSource field to be a type of ACPI String. This means that to compile properly we need to enclosure the name path into double quotes. This will in practice defer the interpretation to a run-time stage, However, this may be interpreted differently on different OSes and ACPI interpreter implementations. In particular ACPICA might not correctly recognize the leading '^' (caret) character and will not resolve the relative name path properly. On top of that, this piece may be used in SSDTs which are loaded after the DSDT and on itself may also not resolve relative name paths outside of their own scopes. With this all said, fix documentation to use fully-qualified name paths always to avoid any misinterpretations, which is proven to work. Fixes:8eb5c87a92
("i2c: add ACPI support for I2C mux ports") Reported-by: Yevhen Kondrashyn <e.kondrashyn@gmail.com> Cc: All applicable <stable@vger.kernel.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://patch.msgid.link/20250710170225.961303-1-andriy.shevchenko@linux.intel.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
71379495ab
commit
289d1d1fc1
|
@ -14,7 +14,7 @@ Consider this topology::
|
|||
| | | 0x70 |--CH01--> i2c client B (0x50)
|
||||
+------+ +------+
|
||||
|
||||
which corresponds to the following ASL::
|
||||
which corresponds to the following ASL (in the scope of \_SB)::
|
||||
|
||||
Device (SMB1)
|
||||
{
|
||||
|
@ -24,7 +24,7 @@ which corresponds to the following ASL::
|
|||
Name (_HID, ...)
|
||||
Name (_CRS, ResourceTemplate () {
|
||||
I2cSerialBus (0x70, ControllerInitiated, I2C_SPEED,
|
||||
AddressingMode7Bit, "^SMB1", 0x00,
|
||||
AddressingMode7Bit, "\\_SB.SMB1", 0x00,
|
||||
ResourceConsumer,,)
|
||||
}
|
||||
|
||||
|
@ -37,7 +37,7 @@ which corresponds to the following ASL::
|
|||
Name (_HID, ...)
|
||||
Name (_CRS, ResourceTemplate () {
|
||||
I2cSerialBus (0x50, ControllerInitiated, I2C_SPEED,
|
||||
AddressingMode7Bit, "^CH00", 0x00,
|
||||
AddressingMode7Bit, "\\_SB.SMB1.CH00", 0x00,
|
||||
ResourceConsumer,,)
|
||||
}
|
||||
}
|
||||
|
@ -52,7 +52,7 @@ which corresponds to the following ASL::
|
|||
Name (_HID, ...)
|
||||
Name (_CRS, ResourceTemplate () {
|
||||
I2cSerialBus (0x50, ControllerInitiated, I2C_SPEED,
|
||||
AddressingMode7Bit, "^CH01", 0x00,
|
||||
AddressingMode7Bit, "\\_SB.SMB1.CH01", 0x00,
|
||||
ResourceConsumer,,)
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue
Block a user