| Masahiro Yamada | b6036bc | 2015-01-13 12:44:35 +0900 | [diff] [blame] | 1 | config DM_I2C |
| 2 | bool "Enable Driver Model for I2C drivers" |
| 3 | depends on DM |
| 4 | help |
| Przemyslaw Marczak | 705fcf4 | 2015-03-31 18:57:17 +0200 | [diff] [blame] | 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. |
| Masahiro Yamada | 26f820f | 2015-01-13 12:44:36 +0900 | [diff] [blame] | 12 | |
| Simon Glass | 4bba9d3 | 2015-02-13 12:20:48 -0700 | [diff] [blame] | 13 | config 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 | |
| Przemyslaw Marczak | c54473c | 2015-03-31 18:57:18 +0200 | [diff] [blame] | 22 | config 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 | |
| Simon Glass | 1174aad | 2015-03-06 13:19:04 -0700 | [diff] [blame] | 31 | config 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 | |
| Masahiro Yamada | 26f820f | 2015-01-13 12:44:36 +0900 | [diff] [blame] | 61 | config SYS_I2C_UNIPHIER |
| 62 | bool "UniPhier I2C driver" |
| 63 | depends on ARCH_UNIPHIER && DM_I2C |
| 64 | default y |
| 65 | help |
| Masahiro Yamada | b6ef3a3 | 2015-05-29 17:30:01 +0900 | [diff] [blame] | 66 | Support for UniPhier I2C controller driver. This I2C controller |
| 67 | is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs. |
| Masahiro Yamada | 238bd0b | 2015-01-13 12:44:37 +0900 | [diff] [blame] | 68 | |
| 69 | config SYS_I2C_UNIPHIER_F |
| 70 | bool "UniPhier FIFO-builtin I2C driver" |
| 71 | depends on ARCH_UNIPHIER && DM_I2C |
| 72 | default y |
| 73 | help |
| Masahiro Yamada | b6ef3a3 | 2015-05-29 17:30:01 +0900 | [diff] [blame] | 74 | Support for UniPhier FIFO-builtin I2C controller driver. |
| Masahiro Yamada | 238bd0b | 2015-01-13 12:44:37 +0900 | [diff] [blame] | 75 | This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs. |