unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
1
Fork 0
Code Pull requests 5 Wiki Activity

dt-bindings: i2c: I2C binding for Mellanox BlueField SoC

Browse source 
Add device tree bindings documentation for Mellanox BlueField
I2C SMBus controller.

Signed-off-by: Khalil Blaiech <kblaiech@mellanox.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Khalil Blaiech 2020-09-22 18:49:38 -04:00 committed by Wolfram Sang
parent 668ba5e690
commit d9becc53b3
1 changed files with 42 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

42
Documentation/devicetree/bindings/i2c/mellanox,i2c-mlxbf.txt Normal file
View file

@ -0,0 +1,42 @@
Device tree configuration for the Mellanox I2C SMBus on BlueField SoCs
Required Properties:
- compatible : should be "mellanox,i2c-mlxbf1" or "mellanox,i2c-mlxbf2".
- reg : address offset and length of the device registers. The
registers consist of the following set of resources:
1) Smbus block registers.
2) Cause master registers.
3) Cause slave registers.
4) Cause coalesce registers (if compatible isn't set
to "mellanox,i2c-mlxbf1").
- interrupts : interrupt number.
Optional Properties:
- clock-frequency : bus frequency used to configure timing registers;
allowed values are 100000, 400000 and 1000000;
those are expressed in Hz. Default is 100000.
Example:
i2c@2804000 {
compatible = "mellanox,i2c-mlxbf1";
reg = <0x02804000 0x800>,
<0x02801200 0x020>,
<0x02801260 0x020>;
interrupts = <57>;
clock-frequency = <100000>;
};
i2c@2808800 {
compatible = "mellanox,i2c-mlxbf2";
reg = <0x02808800 0x600>,
<0x02808e00 0x020>,
<0x02808e20 0x020>,
<0x02808e40 0x010>;
interrupts = <57>;
clock-frequency = <400000>;
};