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cdx: add sysfs for subsystem, class and revision

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CDX controller provides subsystem vendor, subsystem device, class and
revision info of the device along with vendor and device ID in native
endian format. CDX Bus system uses this information to bind the cdx
device to the cdx device driver.

Co-developed-by: Puneet Gupta <puneet.gupta@amd.com>
Signed-off-by: Puneet Gupta <puneet.gupta@amd.com>
Co-developed-by: Nipun Gupta <nipun.gupta@amd.com>
Signed-off-by: Nipun Gupta <nipun.gupta@amd.com>
Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com>
Reviewed-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@amd.com>
Tested-by: Nikhil Agarwal <nikhil.agarwal@amd.com>
Link: https://lore.kernel.org/r/20231017160505.10640-8-abhijit.gangurde@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Abhijit Gangurde
2023-10-17 21:35:05 +05:30
committed by Greg Kroah-Hartman
parent 0174f58104
commit fa10f41309
8 changed files with 135 additions and 3 deletions
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10
include/linux/mod_devicetable.h
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@@ -935,6 +935,12 @@ enum {
* struct cdx_device_id - CDX device identifier
* @vendor: Vendor ID
* @device: Device ID
* @subvendor: Subsystem vendor ID (or CDX_ANY_ID)
* @subdevice: Subsystem device ID (or CDX_ANY_ID)
* @class: Device class
* Most drivers do not need to specify class/class_mask
* as vendor/device is normally sufficient.
* @class_mask: Limit which sub-fields of the class field are compared.
* @override_only: Match only when dev->driver_override is this driver.
*
* Type of entries in the "device Id" table for CDX devices supported by
@@ -943,6 +949,10 @@ enum {
struct cdx_device_id {
__u16 vendor;
__u16 device;
__u16 subvendor;
__u16 subdevice;
__u32 class;
__u32 class_mask;
__u32 override_only;
};