u-boot.git/drivers/i2c, branch v2016.05-rc3

i2c: designware_i2c: Add support for PCI(e) based I2C cores (x86)

2016-04-25T05:31:58Z

This patch adds support for the PCI(e) based I2C cores. Which can be found for example on the Intel Bay Trail SoC. It has 7 I2C controllers implemented as PCI devices. This patch also adds the fixed values for the timing registers for BayTrail which are taken from the Linux designware I2C driver. Signed-off-by: Stefan Roese Cc: Simon Glass Cc: Bin Meng Cc: Marek Vasut Cc: Heiko Schocher Reviewed-by: Bin Meng

i2c: designware_i2c: Add DM support

2016-04-25T05:31:48Z

This patch adds DM support to the designware I2C driver. It currently supports DM and the legacy I2C support. The legacy support should be removed, once all platforms using it have DM enabled. Signed-off-by: Stefan Roese Reviewed-by: Simon Glass Reviewed-by: Bin Meng Cc: Marek Vasut Cc: Heiko Schocher

i2c: designware_i2c: Prepare for DM driver conversion

2016-04-25T05:31:38Z

This patch prepares the designware I2C driver for the DM conversion. This is mainly done by removing struct i2c_adapter from the functions that shall be used by the DM driver version as well. Signed-off-by: Stefan Roese Reviewed-by: Simon Glass Reviewed-by: Bin Meng Cc: Marek Vasut Cc: Heiko Schocher

i2c: designware_i2c: Integrate set_speed() into dw_i2c_set_bus_speed()

2016-04-25T05:31:28Z

Integrating set_speed() into dw_i2c_set_bus_speed() will make the conversion to DM easier for this driver. Signed-off-by: Stefan Roese Cc: Simon Glass Reviewed-by: Bin Meng Cc: Marek Vasut Cc: Heiko Schocher

i2c: designware_i2c: Add dw_i2c_enable() helper function

2016-04-25T05:31:16Z

dw_i2c_enable() is used to dis-/en-able the I2C controller. It makes sense to add such a function, as the controller is dis-/en-abled multiple times in the code. Additionally, this function now checks, if the controller is really dis-/en-abled. This code is copied from the Linux I2C driver version. Signed-off-by: Stefan Roese Cc: Simon Glass Cc: Bin Meng Cc: Marek Vasut Cc: Heiko Schocher Reviewed-by: Bin Meng

i2c: designware_i2c: Add ic_enable_status to ic_regs struct

2016-04-25T05:31:04Z

Add the ic_enable_status register to the i2c_regs struct. Additionally the register offsets are added, to better check, if the offset matches the register description in the datasheet. Signed-off-by: Stefan Roese Cc: Simon Glass Reviewed-by: Bin Meng Cc: Marek Vasut Cc: Heiko Schocher

dm: i2c: Add driver for Cadence I2C IP

2016-04-13T16:29:07Z

This is a possible drop in replacement for drivers/i2c/zynq-i2c.c Since this is cadence IP it has been renamed to cdns-i2c, to make sense with the compatible string. Signed-off-by: Moritz Fischer Reviewed-by: Heiko Schocher Signed-off-by: Michal Simek

i2c: uniphier: use devm_get_addr() to get base address

2016-03-31T15:17:13Z

Currently, fdtdec_get_addr_size() does not support the address translation, so it cannot handle device trees with non-straight "ranges" properties. (This would be a problem with DTS for UniPhier ARMv8 SoCs.) Signed-off-by: Masahiro Yamada

omap24xx_i2c: Implement CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW

2016-03-28T07:23:28Z

Signed-off-by: Guy Thouret Cc: Heiko Schocher

dm: i2c: mxc_i2c: implement i2c_idle_bus

2016-03-28T07:22:58Z

Implement i2c_idle_bus in driver, then setup_i2c can be dropped for boards which enable DM_I2C/DM_GPIO/PINCTRL. The i2c_idle_bus force bus idle flow follows setup_i2c in arch/arm/imx-common/i2c-mxv7.c This patch is an implementation following linux kernel patch: " commit 1c4b6c3bcf30d0804db0d0647d8ebeb862c6f7e5 Author: Gao Pan Date: Fri Oct 23 20:28:54 2015 +0800 i2c: imx: implement bus recovery Implement bus recovery methods for i2c-imx so we can recover from situations where SCL/SDA are stuck low. Once i2c bus SCL/SDA are stuck low during transfer, config the i2c pinctrl to gpio mode by calling pinctrl sleep set function, and then use GPIO to emulate the i2c protocol to send nine dummy clock to recover i2c device. After recovery, set i2c pinctrl to default group setting. " See Documentation/devicetree/bindings/i2c/i2c-imx.txt for detailed description. 1. Introuduce scl_gpio/sda_gpio/bus in mxc_i2c_bus. 2. Discard the __weak attribute for i2c_idle_bus and implement it, since we have pinctrl driver/driver model gpio driver. We can use device tree, but not let board code to do this. 3. gpio state for mxc_i2c is not a must, but it is recommended. If there is no gpio state, driver will give tips, but not fail. 4. The i2c controller was first probed, default pinctrl state will be used, so when need to use gpio function, need to do "pinctrl_select_state(dev, "gpio")" and after force bus idle, need to switch back "pinctrl_select_state(dev, "default")". This is example about how to use the gpio force bus idle function: " &i2c1 { clock-frequency = <100000>; pinctrl-names = "default", "gpio"; pinctrl-0 = <&pinctrl_i2c1>; pinctrl-1 = <&pinctrl_i2c1_gpio>; scl-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>; sda-gpios = <&gpio1 29 GPIO_ACTIVE_HIGH>; status = "okay"; [....] }; [.....] pinctrl_i2c1_gpio: i2c1grp_gpio { fsl,pins = < MX6UL_PAD_UART4_TX_DATA__GPIO1_IO28 0x1b8b0 MX6UL_PAD_UART4_RX_DATA__GPIO1_IO29 0x1b8b0 >; }; " Signed-off-by: Peng Fan Cc: Albert Aribaud Cc: Stefano Babic Cc: Heiko Schocher Cc: Simon Glass Cc: York Sun