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#
# I2C subsystem configuration
#
menuconfig I2C
bool "I2C support"
default y
help
Note:
This is a stand-in for an option to enable I2C support. In fact this
simply enables building of the I2C directory for U-Boot. The actual
I2C feature is enabled by DM_I2C (for driver model) and
the #define CONFIG_SYS_I2C_LEGACY (for the legacy I2C stack).
So at present there is no need to ever disable this option.
Eventually it will:
Enable support for the I2C (Inter-Integrated Circuit) bus in U-Boot.
I2C works with a clock and data line which can be driven by a
one or more masters or slaves. It is a fairly complex bus but is
widely used as it only needs two lines for communication. Speeds of
400kbps are typical but up to 3.4Mbps is supported by some
hardware. Enable this option to build the drivers in drivers/i2c as
part of a U-Boot build.
if I2C
config DM_I2C
bool "Enable Driver Model for I2C drivers"
depends on DM
help
Enable driver model for I2C. The I2C uclass interface: probe, read,
write and speed, is implemented with the bus drivers operations,
which provide methods for bus setting and data transfer. Each chip
device (bus child) info is kept as parent plat. The interface
is defined in include/i2c.h.
config SPL_DM_I2C
bool "Enable Driver Model for I2C drivers in SPL"
depends on SPL_DM && DM_I2C
default y
help
Enable driver model for I2C. The I2C uclass interface: probe, read,
write and speed, is implemented with the bus drivers operations,
which provide methods for bus setting and data transfer. Each chip
device (bus child) info is kept as parent platdata. The interface
is defined in include/i2c.h.
config VPL_DM_I2C
bool "Enable Driver Model for I2C drivers in VPL"
depends on VPL_DM && DM_I2C
default y
help
Enable driver model for I2C. The I2C uclass interface: probe, read,
write and speed, is implemented with the bus drivers operations,
which provide methods for bus setting and data transfer. Each chip
device (bus child) info is kept as parent platdata. The interface
is defined in include/i2c.h.
config SYS_I2C_LEGACY
bool "Enable legacy I2C subsystem and drivers"
depends on !DM_I2C
help
Enable the legacy I2C subsystem and drivers. While this is
deprecated in U-Boot itself, this can be useful in some situations
in SPL or TPL.
config SPL_SYS_I2C_LEGACY
bool "Enable legacy I2C subsystem and drivers in SPL"
depends on SUPPORT_SPL && !SPL_DM_I2C
help
Enable the legacy I2C subsystem and drivers in SPL. This is useful
in some size constrained situations.
config TPL_SYS_I2C_LEGACY
bool "Enable legacy I2C subsystem and drivers in TPL"
depends on SUPPORT_TPL && !SPL_DM_I2C
help
Enable the legacy I2C subsystem and drivers in TPL. This is useful
in some size constrained situations.
config SYS_I2C_EARLY_INIT
bool "Enable legacy I2C subsystem early in boot"
depends on BOARD_EARLY_INIT_F && SPL_SYS_I2C_LEGACY && SYS_I2C_MXC
help
Add the function prototype for i2c_early_init_f which is called in
board_early_init_f.
config I2C_CROS_EC_TUNNEL
tristate "Chrome OS EC tunnel I2C bus"
depends on CROS_EC
help
This provides an I2C bus that will tunnel i2c commands through to
the other side of the Chrome OS EC to the I2C bus connected there.
This will work whatever the interface used to talk to the EC (SPI,
I2C or LPC). Some Chromebooks use this when the hardware design
does not allow direct access to the main PMIC from the AP.
config I2C_CROS_EC_LDO
bool "Provide access to LDOs on the Chrome OS EC"
depends on CROS_EC
---help---
On many Chromebooks the main PMIC is inaccessible to the AP. This is
often dealt with by using an I2C pass-through interface provided by
the EC. On some unfortunate models (e.g. Spring) the pass-through
is not available, and an LDO message is available instead. This
option enables a driver which provides very basic access to those
regulators, via the EC. We implement this as an I2C bus which
emulates just the TPS65090 messages we know about. This is done to
avoid duplicating the logic in the TPS65090 regulator driver for
enabling/disabling an LDO.
config I2C_SET_DEFAULT_BUS_NUM
bool "Set default I2C bus number"
depends on DM_I2C
help
Set default number of I2C bus to be accessed. This option provides
behaviour similar to old (i.e. pre DM) I2C bus driver.
config I2C_DEFAULT_BUS_NUMBER
hex "I2C default bus number"
depends on I2C_SET_DEFAULT_BUS_NUM
default 0x0
help
Number of default I2C bus to use
config DM_I2C_GPIO
bool "Enable Driver Model for software emulated I2C bus driver"
depends on DM_I2C && DM_GPIO
help
Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO
configuration is given by the device tree. Kernel-style device tree
bindings are supported.
Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
config SPL_DM_I2C_GPIO
bool "Enable Driver Model for software emulated I2C bus driver in SPL"
depends on SPL_DM && DM_I2C_GPIO && SPL_DM_GPIO && SPL_GPIO
default y
help
Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO
configuration is given by the device tree. Kernel-style device tree
bindings are supported.
Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
config SYS_I2C_AT91
bool "Atmel I2C driver"
depends on DM_I2C && ARCH_AT91
help
Add support for the Atmel I2C driver. A serious problem is that there
is no documented way to issue repeated START conditions for more than
two messages, as needed to support combined I2C messages. Use the
i2c-gpio driver unless your system can cope with this limitation.
Binding info: doc/device-tree-bindings/i2c/i2c-at91.txt
config SYS_I2C_IPROC
bool "Broadcom I2C driver"
depends on DM_I2C
help
Broadcom I2C driver.
Add support for Broadcom I2C driver.
Say yes here to to enable the Broadco I2C driver.
config SYS_I2C_FSL
bool "Freescale I2C bus driver"
help
Add support for Freescale I2C busses as used on MPC8240, MPC8245, and
MPC85xx processors.
if SYS_I2C_FSL && (SYS_I2C_LEGACY || SPL_SYS_I2C_LEGACY)
config SYS_FSL_I2C_OFFSET
hex "Offset from the IMMR of the address of the first I2C controller"
config SYS_FSL_HAS_I2C2_OFFSET
bool "Support a second I2C controller"
config SYS_FSL_I2C2_OFFSET
hex "Offset from the IMMR of the address of the second I2C controller"
depends on SYS_FSL_HAS_I2C2_OFFSET
config SYS_FSL_HAS_I2C3_OFFSET
bool "Support a third I2C controller"
config SYS_FSL_I2C3_OFFSET
hex "Offset from the IMMR of the address of the third I2C controller"
depends on SYS_FSL_HAS_I2C3_OFFSET
config SYS_FSL_HAS_I2C4_OFFSET
bool "Support a fourth I2C controller"
config SYS_FSL_I2C4_OFFSET
hex "Offset from the IMMR of the address of the fourth I2C controller"
depends on SYS_FSL_HAS_I2C4_OFFSET
endif
config SYS_I2C_CADENCE
tristate "Cadence I2C Controller"
depends on DM_I2C
help
Say yes here to select Cadence I2C Host Controller. This controller is
e.g. used by Xilinx Zynq.
config SYS_I2C_CA
tristate "Cortina-Access I2C Controller"
depends on DM_I2C && CORTINA_PLATFORM
help
Add support for the Cortina Access I2C host controller.
Say yes here to select Cortina-Access I2C Host Controller.
config SYS_I2C_DAVINCI
bool "Davinci I2C Controller"
depends on (ARCH_KEYSTONE || ARCH_DAVINCI)
help
Say yes here to add support for Davinci and Keystone I2C controller
config SYS_I2C_DW
bool "Designware I2C Controller"
help
Say yes here to select the Designware I2C Host Controller. This
controller is used in various SoCs, e.g. the ST SPEAr, Altera
SoCFPGA, Synopsys ARC700 and some Intel x86 SoCs.
config SYS_I2C_ASPEED
bool "Aspeed I2C Controller"
depends on DM_I2C && ARCH_ASPEED
help
Say yes here to select Aspeed I2C Host Controller. The driver
supports AST2500 and AST2400 controllers, but is very limited.
Only single master mode is supported and only byte-by-byte
synchronous reads and writes are supported, no Pool Buffers or DMA.
config SYS_I2C_INTEL
bool "Intel I2C/SMBUS driver"
depends on DM_I2C
help
Add support for the Intel SMBUS driver. So far this driver is just
a stub which perhaps some basic init. There is no implementation of
the I2C API meaning that any I2C operations will immediately fail
for now.
config SYS_I2C_IMX_LPI2C
bool "NXP i.MX LPI2C driver"
help
Add support for the NXP i.MX LPI2C driver.
config SYS_I2C_LPC32XX
bool "LPC32XX I2C driver"
depends on ARCH_LPC32XX
help
Enable support for the LPC32xx I2C driver.
config SYS_I2C_MESON
bool "Amlogic Meson I2C driver"
depends on DM_I2C && ARCH_MESON
help
Add support for the I2C controller available in Amlogic Meson
SoCs. The controller supports programmable bus speed including
standard (100kbits/s) and fast (400kbit/s) speed and allows the
software to define a flexible format of the bit streams. It has an
internal buffer holding up to 8 bytes for transfers and supports
both 7-bit and 10-bit addresses.
config SYS_I2C_MICROCHIP
bool "Microchip I2C driver"
help
Add support for the Microchip I2C driver. This is operating on
standard mode up to 100 kbits/s and fast mode up to 400 kbits/s.
config SYS_I2C_MXC
bool "NXP MXC I2C driver"
help
Add support for the NXP I2C driver. This supports up to four bus
channels and operating on standard mode up to 100 kbits/s and fast
mode up to 400 kbits/s.
if SYS_I2C_MXC && (SYS_I2C_LEGACY || SPL_SYS_I2C_LEGACY)
config SYS_I2C_MXC_I2C1
bool "NXP MXC I2C1"
help
Add support for NXP MXC I2C Controller 1.
Required for SoCs which have I2C MXC controller 1 eg LS1088A, LS2080A
config SYS_I2C_MXC_I2C2
bool "NXP MXC I2C2"
help
Add support for NXP MXC I2C Controller 2.
Required for SoCs which have I2C MXC controller 2 eg LS1088A, LS2080A
config SYS_I2C_MXC_I2C3
bool "NXP MXC I2C3"
help
Add support for NXP MXC I2C Controller 3.
Required for SoCs which have I2C MXC controller 3 eg LS1088A, LS2080A
config SYS_I2C_MXC_I2C4
bool "NXP MXC I2C4"
help
Add support for NXP MXC I2C Controller 4.
Required for SoCs which have I2C MXC controller 4 eg LS1088A, LS2080A
config SYS_I2C_MXC_I2C5
bool "NXP MXC I2C5"
help
Add support for NXP MXC I2C Controller 5.
Required for SoCs which have I2C MXC controller 5 eg LX2160A
config SYS_I2C_MXC_I2C6
bool "NXP MXC I2C6"
help
Add support for NXP MXC I2C Controller 6.
Required for SoCs which have I2C MXC controller 6 eg LX2160A
config SYS_I2C_MXC_I2C7
bool "NXP MXC I2C7"
help
Add support for NXP MXC I2C Controller 7.
Required for SoCs which have I2C MXC controller 7 eg LX2160A
config SYS_I2C_MXC_I2C8
bool "NXP MXC I2C8"
help
Add support for NXP MXC I2C Controller 8.
Required for SoCs which have I2C MXC controller 8 eg LX2160A
endif
if SYS_I2C_MXC_I2C1
config SYS_MXC_I2C1_SPEED
int "I2C Channel 1 speed"
default 40000000 if TARGET_LS2080A_EMU
default 100000
help
MXC I2C Channel 1 speed
config SYS_MXC_I2C1_SLAVE
hex "I2C1 Slave"
default 0
help
MXC I2C1 Slave
endif
if SYS_I2C_MXC_I2C2
config SYS_MXC_I2C2_SPEED
int "I2C Channel 2 speed"
default 40000000 if TARGET_LS2080A_EMU
default 100000
help
MXC I2C Channel 2 speed
config SYS_MXC_I2C2_SLAVE
hex "I2C2 Slave"
default 0
help
MXC I2C2 Slave
endif
if SYS_I2C_MXC_I2C3
config SYS_MXC_I2C3_SPEED
int "I2C Channel 3 speed"
default 100000
help
MXC I2C Channel 3 speed
config SYS_MXC_I2C3_SLAVE
hex "I2C3 Slave"
default 0
help
MXC I2C3 Slave
endif
if SYS_I2C_MXC_I2C4
config SYS_MXC_I2C4_SPEED
int "I2C Channel 4 speed"
default 100000
help
MXC I2C Channel 4 speed
config SYS_MXC_I2C4_SLAVE
hex "I2C4 Slave"
default 0
help
MXC I2C4 Slave
endif
if SYS_I2C_MXC_I2C5
config SYS_MXC_I2C5_SPEED
int "I2C Channel 5 speed"
default 100000
help
MXC I2C Channel 5 speed
config SYS_MXC_I2C5_SLAVE
hex "I2C5 Slave"
default 0
help
MXC I2C5 Slave
endif
if SYS_I2C_MXC_I2C6
config SYS_MXC_I2C6_SPEED
int "I2C Channel 6 speed"
default 100000
help
MXC I2C Channel 6 speed
config SYS_MXC_I2C6_SLAVE
hex "I2C6 Slave"
default 0
help
MXC I2C6 Slave
endif
if SYS_I2C_MXC_I2C7
config SYS_MXC_I2C7_SPEED
int "I2C Channel 7 speed"
default 100000
help
MXC I2C Channel 7 speed
config SYS_MXC_I2C7_SLAVE
hex "I2C7 Slave"
default 0
help
MXC I2C7 Slave
endif
if SYS_I2C_MXC_I2C8
config SYS_MXC_I2C8_SPEED
int "I2C Channel 8 speed"
default 100000
help
MXC I2C Channel 8 speed
config SYS_MXC_I2C8_SLAVE
hex "I2C8 Slave"
default 0
help
MXC I2C8 Slave
endif
config SYS_I2C_NEXELL
bool "Nexell I2C driver"
depends on DM_I2C
help
Add support for the Nexell I2C driver. This is used with various
Nexell parts such as S5Pxx18 series SoCs. All chips
have several I2C ports and all are provided, controlled by the
device tree.
config SYS_I2C_NPCM
bool "Nuvoton NPCM I2C driver"
help
Support for Nuvoton I2C controller driver.
config SYS_I2C_OCORES
bool "ocores I2C driver"
depends on DM_I2C
help
Add support for ocores I2C controller. For details see
https://opencores.org/projects/i2c
config SYS_I2C_OMAP24XX
bool "TI OMAP2+ I2C driver"
depends on ARCH_OMAP2PLUS || ARCH_K3
help
Add support for the OMAP2+ I2C driver.
config SYS_I2C_RCAR_I2C
bool "Renesas RCar I2C driver"
depends on (RCAR_GEN3 || RCAR_GEN2) && DM_I2C
help
Support for Renesas RCar I2C controller.
config SYS_I2C_RCAR_IIC
bool "Renesas RCar Gen3 IIC driver"
depends on (RCAR_GEN3 || RCAR_GEN2) && DM_I2C
help
Support for Renesas RCar Gen3 IIC controller.
config SYS_I2C_ROCKCHIP
bool "Rockchip I2C driver"
depends on DM_I2C
help
Add support for the Rockchip I2C driver. This is used with various
Rockchip parts such as RK3126, RK3128, RK3036 and RK3288. All chips
have several I2C ports and all are provided, controlled by the
device tree.
config SYS_I2C_SANDBOX
bool "Sandbox I2C driver"
depends on SANDBOX && DM_I2C
help
Enable I2C support for sandbox. This is an emulation of a real I2C
bus. Devices can be attached to the bus using the device tree
which specifies the driver to use. See sandbox.dts as an example.
config SYS_I2C_SH
bool "Legacy SuperH I2C interface"
depends on ARCH_RMOBILE && SYS_I2C_LEGACY
help
Enable the legacy SuperH I2C interface.
if SYS_I2C_SH
config SYS_I2C_SH_NUM_CONTROLLERS
int
default 5
config SYS_I2C_SH_BASE0
hex
default 0xE6820000
config SYS_I2C_SH_BASE1
hex
default 0xE6822000
config SYS_I2C_SH_BASE2
hex
default 0xE6824000
config SYS_I2C_SH_BASE3
hex
default 0xE6826000
config SYS_I2C_SH_BASE4
hex
default 0xE6828000
config SH_I2C_8BIT
bool
default y
config SH_I2C_DATA_HIGH
int
default 4
config SH_I2C_DATA_LOW
int
default 5
config SH_I2C_CLOCK
int
default 104000000
endif
config SYS_I2C_SOFT
bool "Legacy software I2C interface"
help
Enable the legacy software defined I2C interface
config SYS_I2C_SOFT_SPEED
int "Software I2C bus speed"
depends on SYS_I2C_SOFT
default 100000
help
Speed of the software I2C bus
config SYS_I2C_SOFT_SLAVE
hex "Software I2C slave address"
depends on SYS_I2C_SOFT
default 0xfe
help
Slave address of the software I2C bus
config SYS_I2C_OCTEON
bool "Octeon II/III/TX/TX2 I2C driver"
depends on (ARCH_OCTEON || ARCH_OCTEONTX || ARCH_OCTEONTX2) && DM_I2C
default y
help
Add support for the Marvell Octeon I2C driver. This is used with
various Octeon parts such as Octeon II/III and OcteonTX/TX2. All
chips have several I2C ports and all are provided, controlled by
the device tree.
config SYS_I2C_S3C24X0
bool "Samsung I2C driver"
depends on (ARCH_EXYNOS4 || ARCH_EXYNOS5) && DM_I2C
help
Support for Samsung I2C controller as Samsung SoCs.
config SYS_I2C_STM32F7
bool "STMicroelectronics STM32F7 I2C support"
depends on (STM32F7 || STM32H7 || ARCH_STM32MP) && DM_I2C
help
Enable this option to add support for STM32 I2C controller
introduced with STM32F7/H7 SoCs. This I2C controller supports :
_ Slave and master modes
_ Multimaster capability
_ Standard-mode (up to 100 kHz)
_ Fast-mode (up to 400 kHz)
_ Fast-mode Plus (up to 1 MHz)
_ 7-bit and 10-bit addressing mode
_ Multiple 7-bit slave addresses (2 addresses, 1 with configurable mask)
_ All 7-bit addresses acknowledge mode
_ General call
_ Programmable setup and hold times
_ Easy to use event management
_ Optional clock stretching
_ Software reset
config SYS_I2C_SUN6I_P2WI
bool "Allwinner sun6i P2WI controller"
depends on ARCH_SUNXI
help
Support for the P2WI (Push/Pull 2 Wire Interface) controller embedded
in the Allwinner A31 and A31s SOCs. This interface is used to connect
to specific devices like the X-Powers AXP221 PMIC.
config SYS_I2C_SUN8I_RSB
bool "Allwinner sun8i Reduced Serial Bus controller"
depends on ARCH_SUNXI
help
Support for Allwinner's Reduced Serial Bus (RSB) controller. This
controller is responsible for communicating with various RSB based
devices, such as X-Powers AXPxxx PMICs and AC100/AC200 CODEC ICs.
config SYS_I2C_SYNQUACER
bool "Socionext SynQuacer I2C controller"
depends on ARCH_SYNQUACER && DM_I2C
help
Support for Socionext Synquacer I2C controller. This I2C controller
will be used for RTC and LS-connector on DeveloperBox.
config SYS_I2C_TEGRA
bool "NVIDIA Tegra internal I2C controller"
depends on ARCH_TEGRA
help
Support for NVIDIA I2C controller available in Tegra SoCs.
config SYS_I2C_UNIPHIER
bool "UniPhier I2C driver"
depends on ARCH_UNIPHIER && DM_I2C
default y
help
Support for UniPhier I2C controller driver. This I2C controller
is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs.
config SYS_I2C_UNIPHIER_F
bool "UniPhier FIFO-builtin I2C driver"
depends on ARCH_UNIPHIER && DM_I2C
default y
help
Support for UniPhier FIFO-builtin I2C controller driver.
This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs.
config SYS_I2C_VERSATILE
bool "Arm Ltd Versatile I2C bus driver"
depends on DM_I2C && TARGET_VEXPRESS64_JUNO
help
Add support for the Arm Ltd Versatile Express I2C driver. The I2C host
controller is present in the development boards manufactured by Arm Ltd.
config SYS_I2C_MV
bool "Marvell PXA (Armada 3720) I2C driver"
help
Support for PXA based I2C controller used on Armada 3720 SoC.
In Linux, this driver is called i2c-pxa.
config SYS_I2C_MVTWSI
bool "Marvell I2C driver"
help
Support for Marvell I2C controllers as used on the orion5x and
kirkwood SoC families.
config TEGRA186_BPMP_I2C
bool "Enable Tegra186 BPMP-based I2C driver"
depends on TEGRA186_BPMP
help
Support for Tegra I2C controllers managed by the BPMP (Boot and
Power Management Processor). On Tegra186, some I2C controllers are
directly controlled by the main CPU, whereas others are controlled
by the BPMP, and can only be accessed by the main CPU via IPC
requests to the BPMP. This driver covers the latter case.
config SYS_I2C_SLAVE
hex "I2C Slave address channel (all buses)"
depends on SYS_I2C_LEGACY || SPL_SYS_I2C_LEGACY || TPL_SYS_I2C_LEGACY
default 0xfe
help
I2C Slave address channel 0 for all buses in the legacy drivers.
Many boards/controllers/drivers don't support an I2C slave
interface so provide a default slave address for them for use in
common code. A real value for CONFIG_SYS_I2C_SLAVE should be
defined for any board which does support a slave interface and
this default used otherwise.
config SYS_I2C_SPEED
int "I2C Slave channel 0 speed (all buses)"
depends on SYS_I2C_LEGACY || SPL_SYS_I2C_LEGACY || TPL_SYS_I2C_LEGACY
default 100000
help
I2C Slave speed channel 0 for all buses in the legacy drivers.
config SYS_I2C_BUS_MAX
int "Max I2C busses"
depends on ARCH_OMAP2PLUS || ARCH_SOCFPGA
default 2 if TI816X
default 3 if OMAP34XX || AM33XX || AM43XX
default 4 if ARCH_SOCFPGA || OMAP44XX || TI814X
default 5 if OMAP54XX
help
Define the maximum number of available I2C buses.
config SYS_I2C_XILINX_XIIC
bool "Xilinx AXI I2C driver"
depends on DM_I2C
help
Support for Xilinx AXI I2C controller.
config SYS_I2C_IHS
bool "gdsys IHS I2C driver"
depends on DM_I2C
help
Support for gdsys IHS I2C driver on FPGA bus.
source "drivers/i2c/muxes/Kconfig"
endif