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author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /Documentation/devicetree/bindings/i2c/i2c-st.txt |
Initial import
Diffstat (limited to 'Documentation/devicetree/bindings/i2c/i2c-st.txt')
-rw-r--r-- | Documentation/devicetree/bindings/i2c/i2c-st.txt | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/i2c/i2c-st.txt b/Documentation/devicetree/bindings/i2c/i2c-st.txt new file mode 100644 index 000000000..4c26fda38 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-st.txt @@ -0,0 +1,41 @@ +ST SSC binding, for I2C mode operation + +Required properties : +- compatible : Must be "st,comms-ssc-i2c" or "st,comms-ssc4-i2c" +- reg : Offset and length of the register set for the device +- interrupts : the interrupt specifier +- clock-names: Must contain "ssc". +- clocks: Must contain an entry for each name in clock-names. See the common + clock bindings. +- A pinctrl state named "default" must be defined to set pins in mode of + operation for I2C transfer. + +Optional properties : +- clock-frequency : Desired I2C bus clock frequency in Hz. If not specified, + the default 100 kHz frequency will be used. As only Normal and Fast modes + are supported, possible values are 100000 and 400000. +- st,i2c-min-scl-pulse-width-us : The minimum valid SCL pulse width that is + allowed through the deglitch circuit. In units of us. +- st,i2c-min-sda-pulse-width-us : The minimum valid SDA pulse width that is + allowed through the deglitch circuit. In units of us. +- A pinctrl state named "idle" could be defined to set pins in idle state + when I2C instance is not performing a transfer. +- A pinctrl state named "sleep" could be defined to set pins in sleep state + when driver enters in suspend. + + + +Example : + +i2c0: i2c@fed40000 { + compatible = "st,comms-ssc4-i2c"; + reg = <0xfed40000 0x110>; + interrupts = <GIC_SPI 187 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&clk_s_a0_ls CLK_ICN_REG>; + clock-names = "ssc"; + clock-frequency = <400000>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_i2c0_default>; + st,i2c-min-scl-pulse-width-us = <0>; + st,i2c-min-sda-pulse-width-us = <5>; +}; |