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

   1 What:           /sys/devices/platform/firmware\:zynqmp-firmware/ggs*
   2 Date:           March 2020
   3 KernelVersion:  5.6
   4 Contact:        "Jolly Shah" <jollys@xilinx.com>
   5 Description:
   6                 Read/Write PMU global general storage register value,
   7                 GLOBAL_GEN_STORAGE{0:3}.
   8                 Global general storage register that can be used
   9                 by system to pass information between masters.
  10
  11                 The register is reset during system or power-on
  12                 resets. Three registers are used by the FSBL and
  13                 other Xilinx software products: GLOBAL_GEN_STORAGE{4:6}.
  14
  15                 Usage:
  16                 # cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
  17                 # echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
  18
  19                 Example:
  20                 # cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
  21                 # echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
  22
  23 Users:          Xilinx
  24
  25 What:           /sys/devices/platform/firmware\:zynqmp-firmware/pggs*
  26 Date:           March 2020
  27 KernelVersion:  5.6
  28 Contact:        "Jolly Shah" <jollys@xilinx.com>
  29 Description:
  30                 Read/Write PMU persistent global general storage register
  31                 value, PERS_GLOB_GEN_STORAGE{0:3}.
  32                 Persistent global general storage register that
  33                 can be used by system to pass information between
  34                 masters.
  35
  36                 This register is only reset by the power-on reset
  37                 and maintains its value through a system reset.
  38                 Four registers are used by the FSBL and other Xilinx
  39                 software products: PERS_GLOB_GEN_STORAGE{4:7}.
  40                 Register is reset only by a POR reset.
  41
  42                 Usage:
  43                 # cat /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
  44                 # echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
  45
  46                 Example:
  47                 # cat /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
  48                 # echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
  49
  50 Users:          Xilinx