path: root/drivers/i2c/Kconfig

#
# 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 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_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_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_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_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_KEYSTONE || ARCH_OMAP2PLUS || ARCH_SOCFPGA
	default 2 if TI816X
	default 3 if OMAP34XX || AM33XX || AM43XX || ARCH_KEYSTONE
	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