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![Marek Vasut](/assets/img/avatar_default.png)
Add driver for the RCar IIC or DVFS I2C controller. This driver is based on the SH I2C driver, but supports DM and DT probing as well as modern I2C framework API. Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com> Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
255 lines
8.3 KiB
Plaintext
255 lines
8.3 KiB
Plaintext
#
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# I2C subsystem configuration
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#
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menu "I2C support"
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config DM_I2C
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bool "Enable Driver Model for I2C drivers"
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depends on DM
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help
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Enable driver model for I2C. The I2C uclass interface: probe, read,
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write and speed, is implemented with the bus drivers operations,
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which provide methods for bus setting and data transfer. Each chip
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device (bus child) info is kept as parent platdata. The interface
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is defined in include/i2c.h. When i2c bus driver supports the i2c
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uclass, but the device drivers not, then DM_I2C_COMPAT config can
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be used as compatibility layer.
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config DM_I2C_COMPAT
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bool "Enable I2C compatibility layer"
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depends on DM
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help
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Enable old-style I2C functions for compatibility with existing code.
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This option can be enabled as a temporary measure to avoid needing
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to convert all code for a board in a single commit. It should not
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be enabled for any board in an official release.
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config I2C_CROS_EC_TUNNEL
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tristate "Chrome OS EC tunnel I2C bus"
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depends on CROS_EC
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help
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This provides an I2C bus that will tunnel i2c commands through to
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the other side of the Chrome OS EC to the I2C bus connected there.
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This will work whatever the interface used to talk to the EC (SPI,
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I2C or LPC). Some Chromebooks use this when the hardware design
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does not allow direct access to the main PMIC from the AP.
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config I2C_CROS_EC_LDO
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bool "Provide access to LDOs on the Chrome OS EC"
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depends on CROS_EC
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---help---
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On many Chromebooks the main PMIC is inaccessible to the AP. This is
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often dealt with by using an I2C pass-through interface provided by
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the EC. On some unfortunate models (e.g. Spring) the pass-through
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is not available, and an LDO message is available instead. This
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option enables a driver which provides very basic access to those
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regulators, via the EC. We implement this as an I2C bus which
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emulates just the TPS65090 messages we know about. This is done to
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avoid duplicating the logic in the TPS65090 regulator driver for
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enabling/disabling an LDO.
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config I2C_SET_DEFAULT_BUS_NUM
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bool "Set default I2C bus number"
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depends on DM_I2C
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help
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Set default number of I2C bus to be accessed. This option provides
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behaviour similar to old (i.e. pre DM) I2C bus driver.
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config I2C_DEFAULT_BUS_NUMBER
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hex "I2C default bus number"
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depends on I2C_SET_DEFAULT_BUS_NUM
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default 0x0
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help
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Number of default I2C bus to use
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config DM_I2C_GPIO
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bool "Enable Driver Model for software emulated I2C bus driver"
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depends on DM_I2C && DM_GPIO
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help
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Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO
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configuration is given by the device tree. Kernel-style device tree
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bindings are supported.
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Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
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config SYS_I2C_AT91
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bool "Atmel I2C driver"
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depends on DM_I2C && ARCH_AT91
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help
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Add support for the Atmel I2C driver. A serious problem is that there
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is no documented way to issue repeated START conditions for more than
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two messages, as needed to support combined I2C messages. Use the
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i2c-gpio driver unless your system can cope with this limitation.
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Binding info: doc/device-tree-bindings/i2c/i2c-at91.txt
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config SYS_I2C_FSL
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bool "Freescale I2C bus driver"
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depends on DM_I2C
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help
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Add support for Freescale I2C busses as used on MPC8240, MPC8245, and
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MPC85xx processors.
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config SYS_I2C_CADENCE
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tristate "Cadence I2C Controller"
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depends on DM_I2C && (ARCH_ZYNQ || ARM64)
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help
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Say yes here to select Cadence I2C Host Controller. This controller is
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e.g. used by Xilinx Zynq.
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config SYS_I2C_DW
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bool "Designware I2C Controller"
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default n
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help
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Say yes here to select the Designware I2C Host Controller. This
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controller is used in various SoCs, e.g. the ST SPEAr, Altera
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SoCFPGA, Synopsys ARC700 and some Intel x86 SoCs.
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config SYS_I2C_DW_ENABLE_STATUS_UNSUPPORTED
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bool "DW I2C Enable Status Register not supported"
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depends on SYS_I2C_DW && (TARGET_SPEAR300 || TARGET_SPEAR310 || \
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TARGET_SPEAR320 || TARGET_SPEAR600 || TARGET_X600)
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default y
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help
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Some versions of the Designware I2C controller do not support the
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enable status register. This config option can be enabled in such
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cases.
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config SYS_I2C_ASPEED
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bool "Aspeed I2C Controller"
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depends on DM_I2C && ARCH_ASPEED
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help
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Say yes here to select Aspeed I2C Host Controller. The driver
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supports AST2500 and AST2400 controllers, but is very limited.
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Only single master mode is supported and only byte-by-byte
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synchronous reads and writes are supported, no Pool Buffers or DMA.
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config SYS_I2C_INTEL
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bool "Intel I2C/SMBUS driver"
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depends on DM_I2C
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help
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Add support for the Intel SMBUS driver. So far this driver is just
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a stub which perhaps some basic init. There is no implementation of
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the I2C API meaning that any I2C operations will immediately fail
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for now.
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config SYS_I2C_IMX_LPI2C
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bool "NXP i.MX LPI2C driver"
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help
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Add support for the NXP i.MX LPI2C driver.
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config SYS_I2C_MESON
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bool "Amlogic Meson I2C driver"
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depends on DM_I2C && ARCH_MESON
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help
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Add support for the Amlogic Meson I2C driver.
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config SYS_I2C_MXC
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bool "NXP i.MX I2C driver"
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depends on MX6
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help
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Add support for the NXP i.MX I2C driver. This supports upto for bus
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channels and operating on standard mode upto 100 kbits/s and fast
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mode upto 400 kbits/s.
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config SYS_I2C_OMAP24XX
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bool "TI OMAP2+ I2C driver"
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depends on ARCH_OMAP2PLUS
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help
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Add support for the OMAP2+ I2C driver.
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config SYS_I2C_RCAR_IIC
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bool "Renesas RCar Gen3 IIC driver"
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depends on RCAR_GEN3 && DM_I2C
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help
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Support for Renesas RCar Gen3 IIC controller.
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config SYS_I2C_ROCKCHIP
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bool "Rockchip I2C driver"
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depends on DM_I2C
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help
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Add support for the Rockchip I2C driver. This is used with various
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Rockchip parts such as RK3126, RK3128, RK3036 and RK3288. All chips
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have several I2C ports and all are provided, controled by the
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device tree.
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config SYS_I2C_SANDBOX
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bool "Sandbox I2C driver"
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depends on SANDBOX && DM_I2C
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help
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Enable I2C support for sandbox. This is an emulation of a real I2C
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bus. Devices can be attached to the bus using the device tree
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which specifies the driver to use. See sandbox.dts as an example.
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config SYS_I2C_S3C24X0
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bool "Samsung I2C driver"
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depends on ARCH_EXYNOS4 && DM_I2C
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help
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Support for Samsung I2C controller as Samsung SoCs.
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config SYS_I2C_STM32F7
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bool "STMicroelectronics STM32F7 I2C support"
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depends on (STM32F7 || STM32H7) && DM_I2C
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help
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Enable this option to add support for STM32 I2C controller
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introduced with STM32F7/H7 SoCs. This I2C controller supports :
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_ Slave and master modes
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_ Multimaster capability
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_ Standard-mode (up to 100 kHz)
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_ Fast-mode (up to 400 kHz)
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_ Fast-mode Plus (up to 1 MHz)
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_ 7-bit and 10-bit addressing mode
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_ Multiple 7-bit slave addresses (2 addresses, 1 with configurable mask)
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_ All 7-bit addresses acknowledge mode
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_ General call
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_ Programmable setup and hold times
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_ Easy to use event management
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_ Optional clock stretching
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_ Software reset
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config SYS_I2C_UNIPHIER
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bool "UniPhier I2C driver"
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depends on ARCH_UNIPHIER && DM_I2C
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default y
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help
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Support for UniPhier I2C controller driver. This I2C controller
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is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs.
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config SYS_I2C_UNIPHIER_F
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bool "UniPhier FIFO-builtin I2C driver"
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depends on ARCH_UNIPHIER && DM_I2C
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default y
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help
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Support for UniPhier FIFO-builtin I2C controller driver.
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This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs.
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config SYS_I2C_MVTWSI
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bool "Marvell I2C driver"
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depends on DM_I2C
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help
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Support for Marvell I2C controllers as used on the orion5x and
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kirkwood SoC families.
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config TEGRA186_BPMP_I2C
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bool "Enable Tegra186 BPMP-based I2C driver"
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depends on TEGRA186_BPMP
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help
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Support for Tegra I2C controllers managed by the BPMP (Boot and
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Power Management Processor). On Tegra186, some I2C controllers are
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directly controlled by the main CPU, whereas others are controlled
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by the BPMP, and can only be accessed by the main CPU via IPC
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requests to the BPMP. This driver covers the latter case.
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config SYS_I2C_BUS_MAX
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int "Max I2C busses"
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depends on ARCH_KEYSTONE || ARCH_OMAP2PLUS || ARCH_SOCFPGA
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default 2 if TI816X
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default 3 if OMAP34XX || AM33XX || AM43XX || ARCH_KEYSTONE
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default 4 if ARCH_SOCFPGA || OMAP44XX || TI814X
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default 5 if OMAP54XX
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help
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Define the maximum number of available I2C buses.
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source "drivers/i2c/muxes/Kconfig"
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endmenu
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