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i2c: mlxbf: I2C SMBus driver for Mellanox BlueField SoC

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Add BlueField I2C driver to offer master and slave support for
Mellanox BlueField SoCs. The driver implements an SMBus adapter
and interfaces to multiple busses that can be probed using both
ACPI and Device Tree infrastructures.

The driver supports several SMBus operations to transfer data
back and forth from/to various I2C devices. It is mainly intended
to be consumed by userspace tools and utilities, such as i2c-tools
and decode-dimms to collect memory module information.

On the other hand, the driver has a slave function to support,
among others, an IPMB interface that requires both master and
slave functions to handle transfers between the BlueField SoC
and a board management controllers (e.g., BMC).

Signed-off-by: Khalil Blaiech <kblaiech@mellanox.com>
Reviewed-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Khalil Blaiech 2020-09-22 18:49:37 -04:00 committed by Wolfram Sang
parent d9becc53b3
commit b5b5b32081
4 changed files with 2526 additions and 0 deletions
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6
MAINTAINERS
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@ -11071,6 +11071,12 @@ W: http://www.melfas.com
F: Documentation/devicetree/bindings/input/touchscreen/melfas_mip4.txt
F: drivers/input/touchscreen/melfas_mip4.c
MELLANOX BLUEFIELD I2C DRIVER
M: Khalil Blaiech <kblaiech@mellanox.com>
L: linux-i2c@vger.kernel.org
S: Supported
F: drivers/i2c/busses/i2c-mlxbf.c
MELLANOX ETHERNET DRIVER (mlx4_en)
M: Tariq Toukan <tariqt@nvidia.com>
L: netdev@vger.kernel.org

13
drivers/i2c/busses/Kconfig
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@ -730,6 +730,19 @@ config I2C_LPC2K
This driver can also be built as a module. If so, the module
will be called i2c-lpc2k.
config I2C_MLXBF
tristate "Mellanox BlueField I2C controller"
depends on ARM64
help
Enabling this option will add I2C SMBus support for Mellanox BlueField
system.
This driver can also be built as a module. If so, the module will be
called i2c-mlxbf.
This driver implements an I2C SMBus host controller and enables both
master and slave functions.
config I2C_MESON
tristate "Amlogic Meson I2C controller"
depends on ARCH_MESON || COMPILE_TEST

1
drivers/i2c/busses/Makefile
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@ -140,6 +140,7 @@ obj-$(CONFIG_I2C_BRCMSTB) += i2c-brcmstb.o
obj-$(CONFIG_I2C_CROS_EC_TUNNEL) += i2c-cros-ec-tunnel.o
obj-$(CONFIG_I2C_ELEKTOR) += i2c-elektor.o
obj-$(CONFIG_I2C_ICY) += i2c-icy.o
obj-$(CONFIG_I2C_MLXBF) += i2c-mlxbf.o
obj-$(CONFIG_I2C_MLXCPLD) += i2c-mlxcpld.o
obj-$(CONFIG_I2C_OPAL) += i2c-opal.o
obj-$(CONFIG_I2C_PCA_ISA) += i2c-pca-isa.o

2506
drivers/i2c/busses/i2c-mlxbf.c Normal file
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