From: "Ivan T. Ivanov" <iivanov@xxxxxxxxxx>
The Qualcomm Universal Peripherial (QUP) wraps I2C mini-core and
provide input and output FIFO's for it. I2C controller can operate
as master with supported bus speeds of 100Kbps and 400Kbps.
Signed-off-by: Ivan T. Ivanov <iivanov@xxxxxxxxxx>
---
Documentation/devicetree/bindings/i2c/i2c-qup.txt | 99 +++++++++++++++++++++
1 file changed, 99 insertions(+)
create mode 100644 Documentation/devicetree/bindings/i2c/i2c-qup.txt
diff --git a/Documentation/devicetree/bindings/i2c/i2c-qup.txt b/Documentation/devicetree/bindings/i2c/i2c-qup.txt
new file mode 100644
index 0000000..c682726
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-qup.txt
@@ -0,0 +1,99 @@
+Qualcomm Universal Periferial (QUP) I2C controller
+
+Required properties:
+ - compatible : should be "qcom,i2c-qup"
+ - reg : Offset and length of the register region for the device
+ - interrupts : core interrupt
+
+ - pinctrl-names: Should contain only one value - "default".
+ - pinctrl-0: Should specify pin control group used for this controller.
+
+ - clocks : phandles to clock instances of the device tree nodes
+ - clock-names :
+ "core" : Allow access to FIFO buffers and registers
+ "iface" : Clock used by QUP interface
+
+ - #address-cells : should be <1> Address cells for I2C device address
+ - #size-cells : should be <0> I2C addresses have no size component.
+
+Optional properties :
+ - Child nodes conforming to i2c bus binding
+ - clock-frequency : Desired I2C bus clock frequency in Hz. If
+ not set thedefault frequency is 100kHz
+ - qcom,src-freq : Frequency of the source clocking this bus in Hz.
+ Divider value is set based on soruce-frequency and
+ desired I2C bus frequency. If this value is not
+ provided, the source clock is assumed to be running
+ at 19.2 MHz.
+
+Aliases: An alias may optionally be used to bind the I2C controller
+to bus number. Aliases are of the form i2c<n> where <n> is an integer
+representing the bus number to use.
+
+Example:
+
+ aliases {
+ i2c0 = &i2c_A;
+ i2c1 = &i2c_B;
+ i2c2 = &i2c_C;
+ };
+
+ i2c_A: i2c@f9967000 {
+ compatible = "qcom,i2c-qup";
+ reg = <0Xf9967000 0x1000>;
+ interrupts = <0 105 0>;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c0_data>;
+
+ clocks = <&core>, <&iface>;
+ clock-names = "core", "iface";
+
+ clock-frequency = <100000>;
+ qcom,src-freq = <50000000>;
+ status = "disabled";
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ dummy@60 {
+ compatible = "dummy";
+ reg = <0x60>;
+ };
+ };
+
+ i2c_B: i2c@f9923000 {
+ compatible = "qcom,i2c-qup";
+ reg = <0xf9923000 0x1000>;
+ interrupts = <0 95 0>;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c1_data>;
+
+ clocks = <&core>, <&iface>;
+ clock-names = "core", "iface";
+
+ clock-frequency = <100000>;
+ qcom,src-freq = <19200000>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
+
+ i2c_C: i2c@f9924000 {
+ compatible = "qcom,i2c-qup";
+ reg = <0xf9924000 0x1000>;
+ interrupts = <0 96 0>;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c5_data>;
+
+ clocks = <&core>, <&iface>;
+ clock-names = "core", "iface";
+
+ clock-frequency = <100000>;
+ qcom,src-freq = <50000000>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
--
1.7.9.5
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