drivers/i2c/Kconfig

   1 #
   2 # I2C subsystem configuration
   3 #
   4
   5 menu "I2C support"
   6
   7 config DM_I2C
   8         bool "Enable Driver Model for I2C drivers"
   9         depends on DM
  10         help
  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.
  18
  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
  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
  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.
  51
  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
  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
  91 config SYS_I2C_UNIPHIER
  92         bool "UniPhier I2C driver"
  93         depends on ARCH_UNIPHIER && DM_I2C
  94         default y
  95         help
  96           Support for UniPhier I2C controller driver.  This I2C controller
  97           is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs.
  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
 104           Support for UniPhier FIFO-builtin I2C controller driver.
 105           This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs.
 106
 107 source "drivers/i2c/muxes/Kconfig"
 108
 109 endmenu