From: "Edward A. James" <eajames@xxxxxxxxxx> This series adds an FSI-based device driver for the SBEFIFO. IBM POWER9 processors contain some embedded hardware and software bits collectively referred to as the self boot engine (SBE). One role of the SBE is to act as a proxy that provides access to the registers of the POWER chip from other (embedded) systems. The POWER9 chip contains a hardware frontend for communicating with the SBE from remote systems called the SBEFIFO. The SBEFIFO logic is contained within an FSI CFAM and as such the driver implements an FSI bus device. The SBE expects to communicate using a defined wire protocol; however, the driver knows nothing of the protocol and only provides raw access to the fifo device to userspace applications wishing to communicate with the SBE using the wire protocol. The SBEFIFO consists of two hardware fifos. The upstream fifo is used by the driver to transfer data to the SBE on the POWER chip, from the system hosting the driver. The downstream fifo is used by the driver to transfer data from the SBE on the power chip to the system hosting the driver. Changes since v3: - Add reset procedure and use it if there is data in the FIFO at probe time. - Add timeout for waiting for data to appear in the FIFO; if the SBE isn't running, then previously we would wait forever. - Fix remove() order of operations. - Fix xfr memory leak. - Formatting fixes. Edward A. James (4): dt-bindings: fsi: Add SBEFIFO documentation drivers/fsi: Add SBEFIFO FSI client device driver drivers/fsi: sbefifo: Add miscdevice drivers/fsi: sbefifo: Add in-kernel API .../devicetree/bindings/fsi/ibm,p9-sbefifo.txt | 35 + drivers/fsi/Kconfig | 7 + drivers/fsi/Makefile | 1 + drivers/fsi/fsi-sbefifo.c | 1024 ++++++++++++++++++++ include/linux/fsi-sbefifo.h | 30 + 5 files changed, 1097 insertions(+) create mode 100644 Documentation/devicetree/bindings/fsi/ibm,p9-sbefifo.txt create mode 100644 drivers/fsi/fsi-sbefifo.c create mode 100644 include/linux/fsi-sbefifo.h -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
