projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 0b11dbf7 MY |
1 | # |
| 2 | # I2C subsystem configuration | |
| 3 | # | |
| 4 | ||
| 5 | menu "I2C support" | |
| 6 | ||
| b6036bcd MY |
7 | config DM_I2C |
| 8 | bool "Enable Driver Model for I2C drivers" | |
| 9 | depends on DM | |
| 10 | help | |
| 705fcf4d PM |
11 | Enable driver model for I2C. The I2C uclass interface: probe, read, |
| 12 | write and speed, is implemented with the bus drivers operations, | |
| 13 | which provide methods for bus setting and data transfer. Each chip | |
| 14 | device (bus child) info is kept as parent platdata. The interface | |
| 15 | is defined in include/i2c.h. When i2c bus driver supports the i2c | |
| 16 | uclass, but the device drivers not, then DM_I2C_COMPAT config can | |
| 17 | be used as compatibility layer. | |
| 26f820f3 | 18 | |
| 4bba9d3f SG |
19 | config DM_I2C_COMPAT |
| 20 | bool "Enable I2C compatibility layer" | |
| 21 | depends on DM | |
| 22 | help | |
| 23 | Enable old-style I2C functions for compatibility with existing code. | |
| 24 | This option can be enabled as a temporary measure to avoid needing | |
| 25 | to convert all code for a board in a single commit. It should not | |
| 26 | be enabled for any board in an official release. | |
| 27 | ||
| cc456bd7 SG |
28 | config I2C_CROS_EC_TUNNEL |
| 29 | tristate "Chrome OS EC tunnel I2C bus" | |
| 30 | depends on CROS_EC | |
| 31 | help | |
| 32 | This provides an I2C bus that will tunnel i2c commands through to | |
| 33 | the other side of the Chrome OS EC to the I2C bus connected there. | |
| 34 | This will work whatever the interface used to talk to the EC (SPI, | |
| 35 | I2C or LPC). Some Chromebooks use this when the hardware design | |
| 36 | does not allow direct access to the main PMIC from the AP. | |
| 37 | ||
| f48eaf01 SG |
38 | config I2C_CROS_EC_LDO |
| 39 | bool "Provide access to LDOs on the Chrome OS EC" | |
| 40 | depends on CROS_EC | |
| 41 | ---help--- | |
| 42 | On many Chromebooks the main PMIC is inaccessible to the AP. This is | |
| 43 | often dealt with by using an I2C pass-through interface provided by | |
| 44 | the EC. On some unfortunate models (e.g. Spring) the pass-through | |
| 45 | is not available, and an LDO message is available instead. This | |
| 46 | option enables a driver which provides very basic access to those | |
| 47 | regulators, via the EC. We implement this as an I2C bus which | |
| 48 | emulates just the TPS65090 messages we know about. This is done to | |
| 49 | avoid duplicating the logic in the TPS65090 regulator driver for | |
| 50 | enabling/disabling an LDO. | |
| cc456bd7 | 51 | |
| c54473cb PM |
52 | config DM_I2C_GPIO |
| 53 | bool "Enable Driver Model for software emulated I2C bus driver" | |
| 54 | depends on DM_I2C && DM_GPIO | |
| 55 | help | |
| 56 | Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO | |
| 57 | configuration is given by the device tree. Kernel-style device tree | |
| 58 | bindings are supported. | |
| 59 | Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt | |
| 60 | ||
| 34374699 SG |
61 | config SYS_I2C_ROCKCHIP |
| 62 | bool "Rockchip I2C driver" | |
| 63 | depends on DM_I2C | |
| 64 | help | |
| 65 | Add support for the Rockchip I2C driver. This is used with various | |
| 66 | Rockchip parts such as RK3126, RK3128, RK3036 and RK3288. All chips | |
| 67 | have several I2C ports and all are provided, controled by the | |
| 68 | device tree. | |
| 69 | ||
| 1174aada SG |
70 | config SYS_I2C_SANDBOX |
| 71 | bool "Sandbox I2C driver" | |
| 72 | depends on SANDBOX && DM_I2C | |
| 73 | help | |
| 74 | Enable I2C support for sandbox. This is an emulation of a real I2C | |
| 75 | bus. Devices can be attached to the bus using the device tree | |
| 76 | which specifies the driver to use. As an example, see this device | |
| 77 | tree fragment from sandbox.dts. It shows that the I2C bus has a | |
| 78 | single EEPROM at address 0x2c (7-bit address) which is emulated by | |
| 79 | the driver for "sandbox,i2c-eeprom", which is in | |
| 80 | drivers/misc/i2c_eeprom_emul.c. | |
| 81 | ||
| 82 | i2c@0 { | |
| 83 | #address-cells = <1>; | |
| 84 | #size-cells = <0>; | |
| 85 | reg = <0>; | |
| 86 | compatible = "sandbox,i2c"; | |
| 87 | clock-frequency = <400000>; | |
| 88 | eeprom@2c { | |
| 89 | reg = <0x2c>; | |
| 90 | compatible = "i2c-eeprom"; | |
| 91 | emul { | |
| 92 | compatible = "sandbox,i2c-eeprom"; | |
| 93 | sandbox,filename = "i2c.bin"; | |
| 94 | sandbox,size = <128>; | |
| 95 | }; | |
| 96 | }; | |
| 97 | }; | |
| 98 | ||
| 99 | ||
| 26f820f3 MY |
100 | config SYS_I2C_UNIPHIER |
| 101 | bool "UniPhier I2C driver" | |
| 102 | depends on ARCH_UNIPHIER && DM_I2C | |
| 103 | default y | |
| 104 | help | |
| b6ef3a3f MY |
105 | Support for UniPhier I2C controller driver. This I2C controller |
| 106 | is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs. | |
| 238bd0b8 MY |
107 | |
| 108 | config SYS_I2C_UNIPHIER_F | |
| 109 | bool "UniPhier FIFO-builtin I2C driver" | |
| 110 | depends on ARCH_UNIPHIER && DM_I2C | |
| 111 | default y | |
| 112 | help | |
| b6ef3a3f | 113 | Support for UniPhier FIFO-builtin I2C controller driver. |
| 238bd0b8 | 114 | This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs. |
| 3d1957f0 SG |
115 | |
| 116 | source "drivers/i2c/muxes/Kconfig" | |
| 0b11dbf7 MY |
117 | |
| 118 | endmenu |