|
|
|
|
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 Panasonic 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 Panasonic UniPhier FIFO-builtin I2C controller driver.
|
|
|
|
|
This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs.
|
