u-boot.git/drivers/i2c/Makefile, branch v2015.10-rc2

cros_ec: Support the LDO access method used by spring

2015-08-06T03:06:11Z

Add a driver to support the special LDO access used by spring. This is a custom method in the cros_ec protocol - it does not use an I2C pass-through. There are two implementation choices: 1. Write a special LDO driver which can talk across the EC. Duplicate all the logic from TPS65090 for retrying when the LDO fails to come up. 2. Write a special I2C bus driver which pretends to be a TPS65090 and transfers reads and writes using the LDO message. Either is distasteful. The latter method is chosen since it results in less code duplication and a fairly simple (30-line) implementation of the core logic. The crosec 'ldo' subcommand could be removed (since i2c md/mw will work instead) but is retained as a convenience. Signed-off-by: Simon Glass

dm: cros_ec: Convert the I2C tunnel code to use driver model

2015-08-06T03:06:11Z

The Chrome OS EC supports tunnelling through to an I2C bus on the EC. This currently uses a copy of the I2C command code and a special 'crosec' sub-command. With driver model we can define an I2C bus which tunnels through to the EC, and use the normal 'i2c' command to access it. This simplifies the code and removes some duplication. Add an I2C driver which tunnels through to the EC. Adjust the EC code to support binding child devices so that it can be set up. Adjust the existing I2C xfer function to fit driver model better. For now the old code remains to allow things to still work. It will be removed in a later patch once the new flow is fully enabled. Signed-off-by: Simon Glass

dm: i2c: Add support for multiplexed I2C buses

2015-08-06T03:06:10Z

Add a new I2C_MUX uclass. Devices in this class can multiplex between several I2C buses, selecting them one at a time for use by the system. The multiplexing mechanism is left to the driver to decide - it may be controlled by GPIOs, for example. The uclass supports only two methods: select() and deselect(). The current mux state is expected to be stored in the mux itself since it is the only thing that knows how to make things work. The mux can record the current state and then avoid switching unless it is necessary. So select() can be skipped if the mux is already in the correct state. Also deselect() can be made a nop if required. Signed-off-by: Simon Glass

dm: i2c: add i2c-gpio driver

2015-04-18T17:11:17Z

This commit adds driver model support to software emulated i2c bus driver. This driver supports kernel-style device tree bindings. Fdt properties in use: - compatible - "i2c-gpio" - gpios - data and clock GPIO pin phandles - delay-us - micro seconds delay between GPIOs toggle operations, which is 1/4 of I2C speed clock period. Added: - Config: CONFIG_DM_I2C_GPIO - File: drivers/i2c/i2c-gpio.c - File: doc/device-tree-bindings/i2c/i2c-gpio.txt Driver base code is taken from: drivers/i2c/soft-i2c.c, changes: - use "i2c-gpio" naming - update comments style - move preprocesor macros into functions - add device tree support - add driver model i2c support - code cleanup, - add Kconfig entry Signed-off-by: Przemyslaw Marczak Acked-by: Simon Glass Added braces in i2c_gpio_xfer() to fix style nit: Signed-off-by: Simon Glass

lpc32xx: i2c: add LPC32xx I2C interface support

2015-04-10T12:23:07Z

Signed-off-by: Albert ARIBAUD (3ADEV)

dm: i2c: Add a compatbility layer

2015-01-30T00:09:53Z

For boards which use multiple I2C devices, or for SOCs which support multiple boards, we might want to convert these to driver model at different times. At present this is difficult because we need to either use CONFIG_DM_I2C for a board or not. Add a compatibility layer which implements the old API, thus allowing a board to move to driver model for I2C without requiring that everything it uses is moved in the same commit. Signed-off-by: Simon Glass

i2c: UniPhier: add driver for UniPhier FIFO-builtin i2c controller

2015-01-30T00:09:49Z

This commit adds on-chip I2C driver used on newer SoCs of Panasonic UniPhier platform. Signed-off-by: Masahiro Yamada Reviewed-by: Simon Glass Acked-by: Simon Glass Acked-by: Heiko Schocher

i2c: UniPhier: add driver for UniPhier i2c controller

2015-01-30T00:09:49Z

This commit adds on-chip I2C driver used on some old Panasonic UniPhier SoCs. Signed-off-by: Masahiro Yamada Reviewed-by: Simon Glass Acked-by: Simon Glass Acked-by: Heiko Schocher

dm: i2c: Add a sandbox I2C driver

2014-12-11T20:18:42Z

This driver includes some test features such as only supporting certain bus speeds. It passes its I2C traffic through to an emulator. Acked-by: Heiko Schocher Signed-off-by: Simon Glass Reviewed-by: Masahiro Yamada

dm: i2c: Add I2C emulation driver for sandbox

2014-12-11T20:18:42Z

In order to test I2C we need some sort of emulation interface. Add hooks to allow a driver to emulate an I2C device for sandbox. Signed-off-by: Simon Glass Acked-by: Heiko Schocher Reviewed-by: Masahiro Yamada