lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Fri, 22 Mar 2019 13:47:05 +0000 From: Thomas Preston <thomas.preston@...ethink.co.uk> To: rjw@...ysocki.net, lenb@...nel.org, linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org Cc: Thomas Preston <thomas.preston@...ethink.co.uk> Subject: [PATCH] Documentation: acpi: Add an example for PRP0001 Add an example for the magic PRP0001 device ID which allows matching ACPI devices against drivers using OF Device Tree compatible property. It wasn't clear to me that PRP0001 could be used in _CID. Signed-off-by: Thomas Preston <thomas.preston@...ethink.co.uk> --- Documentation/acpi/enumeration.txt | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/Documentation/acpi/enumeration.txt b/Documentation/acpi/enumeration.txt index 7bcf9c3d9fbe..391db643065a 100644 --- a/Documentation/acpi/enumeration.txt +++ b/Documentation/acpi/enumeration.txt @@ -410,6 +410,33 @@ Specifically, the device IDs returned by _HID and preceding PRP0001 in the _CID return package will be checked first. Also in that case the bus type the device will be enumerated to depends on the device ID returned by _HID. +For example, the following ACPI sample might be used to enumerate an lm75-type +I2C temperature sensor and match it to the driver using the Device Tree +namespace link: + + Device (TMP0) + { + Name (_HID, "TITMP75") /* _HID will appear in sysfs */ + Name (_CID, "PRP0001") + Name (_DSD, Package() { + ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), + Package () { + Package (2) { "compatible", "ti,tmp75" }, + } + }) + Method (_CRS, 0, Serialized) + { + Name (SBUF, ResourceTemplate () + { + I2cSerialBusV2 (0x48, ControllerInitiated, + 400000, AddressingMode7Bit, + "\\_SB.PCI0.I2C1", 0x00, + ResourceConsumer, , Exclusive,) + }) + Return (SBUF) + } + } + It is valid to define device objects with a _HID returning PRP0001 and without the "compatible" property in the _DSD or a _CID as long as one of their ancestors provides a _DSD with a valid "compatible" property. Such device -- 2.11.0
Powered by blists - more mailing lists