diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/device-tree-bindings/i2c/i2c.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/i2c/i2c.txt b/doc/device-tree-bindings/i2c/i2c.txt index de818d4713..9698e4899b 100644 --- a/doc/device-tree-bindings/i2c/i2c.txt +++ b/doc/device-tree-bindings/i2c/i2c.txt @@ -12,6 +12,10 @@ property which allows the chip offset length to be selected. Optional properties: - u-boot,i2c-offset-len - length of chip offset in bytes. If omitted the default value of 1 is used. +- u-boot,i2c-transaction-bytes - the length of single I2C transaction on + the bus. Some devices require more than single byte transmission + (e.g. mc34708 mfd). This information is necessary to correctly + initialize (put into idle state) I2C bus after soft reset. - gpios = <sda ...>, <scl ...>; pinctrl-names = "default", "gpio"; pinctrl-0 = <&i2c_xfer>; @@ -28,6 +32,7 @@ i2c4: i2c@12ca0000 { compatible = "google,cros-ec"; i2c-max-frequency = <100000>; u-boot,i2c-offset-len = <0>; + u-boot,i2c-transaction-bytes = <3>; ec-interrupt = <&gpx1 6 GPIO_ACTIVE_LOW>; }; }; |