ukui/kernel
0
0
Fork 0
mirror of https://github.com/ukui/kernel.git synced 2026-03-09 10:07:04 -07:00
Code Issues Packages Projects Releases Wiki Activity

spi: Add FSI-attached SPI controller driver

Browse Source 
There exists a set of SPI controllers on some POWER processors that may
be accessed through the FSI bus. Add a driver to traverse the FSI CFAM
engine that can access and drive the SPI controllers. This driver would
typically be used by a baseboard management controller (BMC).

The SPI controllers operate by means of programming a sequencing engine
which automatically manages the usual SPI protocol buses. The driver
programs each transfer into the sequencer as various operations
specifying the slave chip and shifting data in and out on the lines.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20200306194118.18581-3-eajames@linux.ibm.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Eddie James
2020-03-06 13:41:18 -06:00
committed by Mark Brown
parent 1e7479df01
commit bbb6b2f986
4 changed files with 573 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
MAINTAINERS
View File

@@ -6861,6 +6861,13 @@ S: Maintained
F: drivers/i2c/busses/i2c-fsi.c
F: Documentation/devicetree/bindings/i2c/i2c-fsi.txt
FSI-ATTACHED SPI DRIVER
M: Eddie James <eajames@linux.ibm.com>
L: linux-spi@vger.kernel.org
S: Maintained
F: drivers/spi/spi-fsi.c
F: Documentation/devicetree/bindings/fsi/ibm,fsi2spi.yaml
FSNOTIFY: FILESYSTEM NOTIFICATION INFRASTRUCTURE
M: Jan Kara <jack@suse.cz>
R: Amir Goldstein <amir73il@gmail.com>

7
drivers/spi/Kconfig
View File

@@ -271,6 +271,13 @@ config SPI_FALCON
has only been tested with m25p80 type chips. The hardware has no
support for other types of SPI peripherals.
config SPI_FSI
tristate "FSI SPI driver"
depends on FSI
help
This enables support for the driver for FSI bus attached SPI
controllers.
config SPI_FSL_LPSPI
tristate "Freescale i.MX LPSPI controller"
depends on ARCH_MXC || COMPILE_TEST

1
drivers/spi/Makefile
View File

@@ -42,6 +42,7 @@ spi-dw-midpci-objs := spi-dw-pci.o spi-dw-mid.o
obj-$(CONFIG_SPI_EFM32) += spi-efm32.o
obj-$(CONFIG_SPI_EP93XX) += spi-ep93xx.o
obj-$(CONFIG_SPI_FALCON) += spi-falcon.o
obj-$(CONFIG_SPI_FSI) += spi-fsi.o
obj-$(CONFIG_SPI_FSL_CPM) += spi-fsl-cpm.o
obj-$(CONFIG_SPI_FSL_DSPI) += spi-fsl-dspi.o
obj-$(CONFIG_SPI_FSL_LIB) += spi-fsl-lib.o

558
drivers/spi/spi-fsi.c Normal file
View File

File diff suppressed because it is too large Load Diff