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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 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.
config DM_I2C_COMPAT
bool "Enable I2C compatibility layer"
depends on DM
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.
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 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. As an example, see this device
tree fragment from sandbox.dts. It shows that the I2C bus has a
single EEPROM at address 0x2c (7-bit address) which is emulated by
the driver for "sandbox,i2c-eeprom", which is in
drivers/misc/i2c_eeprom_emul.c.
i2c@0 {
#address-cells = <1>;
#size-cells = <0>;
reg = <0>;
compatible = "sandbox,i2c";
clock-frequency = <400000>;
eeprom@2c {
reg = <0x2c>;
compatible = "i2c-eeprom";
emul {
compatible = "sandbox,i2c-eeprom";
sandbox,filename = "i2c.bin";
sandbox,size = <128>;
};
};
};
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.
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