Masahiro Yamada | 0b11dbf | 2015-07-26 02:46:26 +0900 | [diff] [blame^] | 1 | # |
| 2 | # I2C subsystem configuration |
| 3 | # |
| 4 | |
| 5 | menu "I2C support" |
| 6 | |
Masahiro Yamada | b6036bc | 2015-01-13 12:44:35 +0900 | [diff] [blame] | 7 | config DM_I2C |
| 8 | bool "Enable Driver Model for I2C drivers" |
| 9 | depends on DM |
| 10 | help |
Przemyslaw Marczak | 705fcf4 | 2015-03-31 18:57:17 +0200 | [diff] [blame] | 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. |
Masahiro Yamada | 26f820f | 2015-01-13 12:44:36 +0900 | [diff] [blame] | 18 | |
Simon Glass | 4bba9d3 | 2015-02-13 12:20:48 -0700 | [diff] [blame] | 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 | |
Simon Glass | cc456bd | 2015-08-03 08:19:23 -0600 | [diff] [blame] | 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 | |
Simon Glass | f48eaf0 | 2015-08-03 08:19:24 -0600 | [diff] [blame] | 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. |
Simon Glass | cc456bd | 2015-08-03 08:19:23 -0600 | [diff] [blame] | 51 | |
Przemyslaw Marczak | c54473c | 2015-03-31 18:57:18 +0200 | [diff] [blame] | 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 | |
Simon Glass | 1174aad | 2015-03-06 13:19:04 -0700 | [diff] [blame] | 61 | config SYS_I2C_SANDBOX |
| 62 | bool "Sandbox I2C driver" |
| 63 | depends on SANDBOX && DM_I2C |
| 64 | help |
| 65 | Enable I2C support for sandbox. This is an emulation of a real I2C |
| 66 | bus. Devices can be attached to the bus using the device tree |
| 67 | which specifies the driver to use. As an example, see this device |
| 68 | tree fragment from sandbox.dts. It shows that the I2C bus has a |
| 69 | single EEPROM at address 0x2c (7-bit address) which is emulated by |
| 70 | the driver for "sandbox,i2c-eeprom", which is in |
| 71 | drivers/misc/i2c_eeprom_emul.c. |
| 72 | |
| 73 | i2c@0 { |
| 74 | #address-cells = <1>; |
| 75 | #size-cells = <0>; |
| 76 | reg = <0>; |
| 77 | compatible = "sandbox,i2c"; |
| 78 | clock-frequency = <400000>; |
| 79 | eeprom@2c { |
| 80 | reg = <0x2c>; |
| 81 | compatible = "i2c-eeprom"; |
| 82 | emul { |
| 83 | compatible = "sandbox,i2c-eeprom"; |
| 84 | sandbox,filename = "i2c.bin"; |
| 85 | sandbox,size = <128>; |
| 86 | }; |
| 87 | }; |
| 88 | }; |
| 89 | |
| 90 | |
Masahiro Yamada | 26f820f | 2015-01-13 12:44:36 +0900 | [diff] [blame] | 91 | config SYS_I2C_UNIPHIER |
| 92 | bool "UniPhier I2C driver" |
| 93 | depends on ARCH_UNIPHIER && DM_I2C |
| 94 | default y |
| 95 | help |
Masahiro Yamada | b6ef3a3 | 2015-05-29 17:30:01 +0900 | [diff] [blame] | 96 | Support for UniPhier I2C controller driver. This I2C controller |
| 97 | is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs. |
Masahiro Yamada | 238bd0b | 2015-01-13 12:44:37 +0900 | [diff] [blame] | 98 | |
| 99 | config SYS_I2C_UNIPHIER_F |
| 100 | bool "UniPhier FIFO-builtin I2C driver" |
| 101 | depends on ARCH_UNIPHIER && DM_I2C |
| 102 | default y |
| 103 | help |
Masahiro Yamada | b6ef3a3 | 2015-05-29 17:30:01 +0900 | [diff] [blame] | 104 | Support for UniPhier FIFO-builtin I2C controller driver. |
Masahiro Yamada | 238bd0b | 2015-01-13 12:44:37 +0900 | [diff] [blame] | 105 | This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs. |
Simon Glass | 3d1957f | 2015-08-03 08:19:21 -0600 | [diff] [blame] | 106 | |
| 107 | source "drivers/i2c/muxes/Kconfig" |
Masahiro Yamada | 0b11dbf | 2015-07-26 02:46:26 +0900 | [diff] [blame^] | 108 | |
| 109 | endmenu |