# I2C subsystem configuration
#
-menu "I2C support"
+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"
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. When i2c bus driver supports the i2c
- uclass, but the device drivers not, then DM_I2C_COMPAT config can
- be used as compatibility layer.
+ is defined in include/i2c.h.
-config DM_I2C_COMPAT
- bool "Enable I2C compatibility layer"
- depends on DM
+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 old-style I2C functions for compatibility with existing code.
- This option can be enabled as a temporary measure to avoid needing
- to convert all code for a board in a single commit. It should not
- be enabled for any board in an official release.
+ 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 I2C_CROS_EC_TUNNEL
tristate "Chrome OS EC tunnel I2C bus"
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
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"
depends on DM_I2C
config SYS_I2C_CADENCE
tristate "Cadence I2C Controller"
- depends on DM_I2C && (ARCH_ZYNQ || ARM64)
+ 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
+ default n
+ 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)
controller is used in various SoCs, e.g. the ST SPEAr, Altera
SoCFPGA, Synopsys ARC700 and some Intel x86 SoCs.
-config SYS_I2C_DW_ENABLE_STATUS_UNSUPPORTED
- bool "DW I2C Enable Status Register not supported"
- depends on SYS_I2C_DW && (TARGET_SPEAR300 || TARGET_SPEAR310 || \
- TARGET_SPEAR320 || TARGET_SPEAR600 || TARGET_X600)
- default y
- help
- Some versions of the Designware I2C controller do not support the
- enable status register. This config option can be enabled in such
- cases.
-
config SYS_I2C_ASPEED
bool "Aspeed I2C Controller"
depends on DM_I2C && ARCH_ASPEED
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
if SYS_I2C_MXC_I2C1
config SYS_MXC_I2C1_SPEED
int "I2C Channel 1 speed"
- default 40000000 if TARGET_LS2080A_SIMU || TARGET_LS2080A_EMU
+ default 40000000 if TARGET_LS2080A_EMU
default 100000
help
MXC I2C Channel 1 speed
if SYS_I2C_MXC_I2C2
config SYS_MXC_I2C2_SPEED
int "I2C Channel 2 speed"
- default 40000000 if TARGET_LS2080A_SIMU || TARGET_LS2080A_EMU
+ default 40000000 if TARGET_LS2080A_EMU
default 100000
help
MXC I2C Channel 2 speed
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
+ depends on ARCH_OMAP2PLUS || ARCH_K3
help
Add support for the OMAP2+ I2C driver.
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_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 && DM_I2C
+ depends on (ARCH_EXYNOS4 || ARCH_EXYNOS5) && DM_I2C
help
Support for Samsung I2C controller as Samsung SoCs.
_ 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 TEGRA
+ depends on ARCH_TEGRA
help
Support for NVIDIA I2C controller available in Tegra SoCs.
config SYS_I2C_VERSATILE
bool "Arm Ltd Versatile I2C bus driver"
- depends on DM_I2C && (TARGET_VEXPRESS_CA15_TC2 || TARGET_VEXPRESS64_JUNO)
+ 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"
- depends on DM_I2C
help
Support for Marvell I2C controllers as used on the orion5x and
kirkwood SoC families.
source "drivers/i2c/muxes/Kconfig"
-endmenu
+endif
projects / platform / kernel / u-boot.git / blobdiff