1config DM_I2C 2 bool "Enable Driver Model for I2C drivers" 3 depends on DM 4 help 5 Enable driver model for I2C. The I2C uclass interface: probe, read, 6 write and speed, is implemented with the bus drivers operations, 7 which provide methods for bus setting and data transfer. Each chip 8 device (bus child) info is kept as parent platdata. The interface 9 is defined in include/i2c.h. When i2c bus driver supports the i2c 10 uclass, but the device drivers not, then DM_I2C_COMPAT config can 11 be used as compatibility layer. 12 13config DM_I2C_COMPAT 14 bool "Enable I2C compatibility layer" 15 depends on DM 16 help 17 Enable old-style I2C functions for compatibility with existing code. 18 This option can be enabled as a temporary measure to avoid needing 19 to convert all code for a board in a single commit. It should not 20 be enabled for any board in an official release. 21 22config DM_I2C_GPIO 23 bool "Enable Driver Model for software emulated I2C bus driver" 24 depends on DM_I2C && DM_GPIO 25 help 26 Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO 27 configuration is given by the device tree. Kernel-style device tree 28 bindings are supported. 29 Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt 30 31config SYS_I2C_SANDBOX 32 bool "Sandbox I2C driver" 33 depends on SANDBOX && DM_I2C 34 help 35 Enable I2C support for sandbox. This is an emulation of a real I2C 36 bus. Devices can be attached to the bus using the device tree 37 which specifies the driver to use. As an example, see this device 38 tree fragment from sandbox.dts. It shows that the I2C bus has a 39 single EEPROM at address 0x2c (7-bit address) which is emulated by 40 the driver for "sandbox,i2c-eeprom", which is in 41 drivers/misc/i2c_eeprom_emul.c. 42 43 i2c@0 { 44 #address-cells = <1>; 45 #size-cells = <0>; 46 reg = <0>; 47 compatible = "sandbox,i2c"; 48 clock-frequency = <400000>; 49 eeprom@2c { 50 reg = <0x2c>; 51 compatible = "i2c-eeprom"; 52 emul { 53 compatible = "sandbox,i2c-eeprom"; 54 sandbox,filename = "i2c.bin"; 55 sandbox,size = <128>; 56 }; 57 }; 58 }; 59 60 61config SYS_I2C_UNIPHIER 62 bool "UniPhier I2C driver" 63 depends on ARCH_UNIPHIER && DM_I2C 64 default y 65 help 66 Support for UniPhier I2C controller driver. This I2C controller 67 is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs. 68 69config SYS_I2C_UNIPHIER_F 70 bool "UniPhier FIFO-builtin I2C driver" 71 depends on ARCH_UNIPHIER && DM_I2C 72 default y 73 help 74 Support for UniPhier FIFO-builtin I2C controller driver. 75 This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs. 76