Documentation/ABI/stable/sysfs-driver-firmware-zynqmp

Source file repositories/reference/linux-study-clean/Documentation/ABI/stable/sysfs-driver-firmware-zynqmp

File Facts

System
Linux kernel
Corpus path
Documentation/ABI/stable/sysfs-driver-firmware-zynqmp
Extension
[no extension]
Size
9884 bytes
Lines
257
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: Documentation
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

What:		/sys/devices/platform/firmware\:zynqmp-firmware/ggs*
Date:		March 2020
KernelVersion:	5.6
Contact:	"Jolly Shah" <jollys@xilinx.com>
Description:
		Read/Write PMU global general storage register value,
		GLOBAL_GEN_STORAGE{0:3}.
		Global general storage register that can be used
		by system to pass information between masters.

		The register is reset during system or power-on
		resets. Three registers are used by the FSBL and
		other Xilinx software products: GLOBAL_GEN_STORAGE{4:6}.

		Usage::

		    # cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
		    # echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0

		Example::

		    # cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
		    # echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0

Users:		Xilinx

What:		/sys/devices/platform/firmware\:zynqmp-firmware/pggs*
Date:		March 2020
KernelVersion:	5.6
Contact:	"Jolly Shah" <jollys@xilinx.com>
Description:
		Read/Write PMU persistent global general storage register
		value, PERS_GLOB_GEN_STORAGE{0:3}.
		Persistent global general storage register that
		can be used by system to pass information between
		masters.

		This register is only reset by the power-on reset
		and maintains its value through a system reset.
		Four registers are used by the FSBL and other Xilinx
		software products: PERS_GLOB_GEN_STORAGE{4:7}.
		Register is reset only by a POR reset.

		Usage::

		    # cat /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
		    # echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/pggs0

		Example::

		    # cat /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
		    # echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/pggs0

Users:		Xilinx

What:		/sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
Date:		March 2020
KernelVersion:	5.6
Contact:	"Jolly Shah" <jollys@xilinx.com>
Description:
		This sysfs interface allows to set the shutdown scope for the
		next shutdown request. When the next shutdown is performed, the
		platform specific portion of PSCI-system_off can use the chosen
		shutdown scope.

		Following are available shutdown scopes(subtypes):

		subsystem:
				Only the APU along with all of its peripherals
				not used by other processing units will be

Annotation

Implementation Notes