u-boot/doc/device-tree-bindings/i2c/nx_i2c.txt
Stefan Bosch c25e9e04a1 i2c: add nexell driver
Changes in relation to FriendlyARM's U-Boot nanopi2-v2016.01:
- i2c/nx_i2c.c: Some adaptions mainly because of changes in
  "struct udevice".
- several Bugfixes in nx_i2c.c.
- the driver has been for s5p6818 only. Code extended appropriately
  in order s5p4418 is also working.
- "probe_chip" added.
- pinctrl-driver/dt is used instead of configuring the i2c I/O-pins
  in the i2c-driver.
- '#ifdef CONFIG...' changed to 'if (IS_ENABLED(CONFIG...))' where
  possible (and similar).
- livetree API (dev_read_...) is used instead of fdt one (fdt...).

Signed-off-by: Stefan Bosch <stefan_b@posteo.net>
2020-07-29 08:43:40 -04:00

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I2C controller embedded in Nexell's/Samsung's SoC S5P4418 and S5P6818
Driver:
- drivers/i2c/nx_i2c.c
Required properties:
- #address-cells = <1>;
- #size-cells = <0>;
- compatible = "nexell,s5pxx18-i2c";
- reg = <i2c_base 0x100>;
Where i2c_base has to be the base address of the i2c-register set.
I2C0: 0xc00a4000
I2C1: 0xc00a5000
I2C2: 0xc00a6000
Optional properties:
- clock-frequency: Desired I2C bus frequency in Hz, default value is 100000.
- i2c-sda-delay-ns (S5P6818 only): SDA delay in ns, default value is 0.
- Child nodes conforming to i2c bus binding.
Example:
i2c0:i2c@c00a4000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "nexell,s5pxx18-i2c";
reg = <0xc00a4000 0x100>;
clock-frequency = <400000>;
};