1# SPDX-License-Identifier: GPL-2.0-only 2# 3# FSI subsystem 4# 5 6menuconfig FSI 7 tristate "FSI support" 8 depends on OF 9 select CRC4 10 help 11 FSI - the FRU Support Interface - is a simple bus for low-level 12 access to POWER-based hardware. 13 14if FSI 15 16config FSI_NEW_DEV_NODE 17 bool "Create '/dev/fsi' directory for char devices" 18 default n 19 help 20 This option causes char devices created for FSI devices to be 21 located under a common /dev/fsi/ directory. Set to N unless your 22 userspace has been updated to handle the new location. 23 24 Additionally, it also causes the char device names to be offset 25 by one so that chip 0 will have /dev/scom1 and chip1 /dev/scom2 26 to match old userspace expectations. 27 28 New userspace will use udev rules to generate predictable access 29 symlinks in /dev/fsi/by-path when this option is enabled. 30 31config FSI_MASTER_GPIO 32 tristate "GPIO-based FSI master" 33 depends on GPIOLIB 34 select CRC4 35 help 36 This option enables a FSI master driver using GPIO lines. 37 38config FSI_MASTER_HUB 39 tristate "FSI hub master" 40 help 41 This option enables a FSI hub master driver. Hub is a type of FSI 42 master that is connected to the upstream master via a slave. Hubs 43 allow chaining of FSI links to an arbitrary depth. This allows for 44 a high target device fanout. 45 46config FSI_MASTER_AST_CF 47 tristate "FSI master based on Aspeed ColdFire coprocessor" 48 depends on GPIOLIB 49 depends on GPIO_ASPEED 50 select GENERIC_ALLOCATOR 51 help 52 This option enables a FSI master using the AST2400 and AST2500 GPIO 53 lines driven by the internal ColdFire coprocessor. This requires 54 the corresponding machine specific ColdFire firmware to be available. 55 56config FSI_MASTER_ASPEED 57 tristate "FSI ASPEED master" 58 depends on HAS_IOMEM 59 help 60 This option enables a FSI master that is present behind an OPB bridge 61 in the AST2600. 62 63 Enable it for your BMC kernel in an OpenPower or IBM Power system. 64 65config FSI_SCOM 66 tristate "SCOM FSI client device driver" 67 help 68 This option enables an FSI based SCOM device driver. 69 70config FSI_SBEFIFO 71 tristate "SBEFIFO FSI client device driver" 72 depends on OF_ADDRESS 73 help 74 This option enables an FSI based SBEFIFO device driver. The SBEFIFO is 75 a pipe-like FSI device for communicating with the self boot engine 76 (SBE) on POWER processors. 77 78config FSI_OCC 79 tristate "OCC SBEFIFO client device driver" 80 depends on FSI_SBEFIFO 81 help 82 This option enables an SBEFIFO based On-Chip Controller (OCC) device 83 driver. The OCC is a device embedded on a POWER processor that collects 84 and aggregates sensor data from the processor and system. The OCC can 85 provide the raw sensor data as well as perform thermal and power 86 management on the system. 87 88endif 89