[PATCH v5 1/2] i2c: qup: Add device tree bindings information
From: Bjorn Andersson <hidden>
Date: 2014-03-14 02:07:59
Also in:
linux-arm-msm, linux-devicetree, linux-i2c, lkml
Subsystem:
arm/qualcomm mailing list, i2c subsystem host drivers, open firmware and flattened device tree bindings, the rest · Maintainers:
Andi Shyti, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
From: "Ivan T. Ivanov" <redacted>
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 <redacted>
[bjorn: reformulated part of binding description
added version to compatible
cleaned up example]
Signed-off-by: Bjorn Andersson <redacted>
---
.../devicetree/bindings/i2c/qcom,i2c-qup.txt | 46 ++++++++++++++++++++
1 file changed, 46 insertions(+)
create mode 100644 Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
diff --git a/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt b/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
new file mode 100644
index 0000000..32ef64e
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt@@ -0,0 +1,46 @@ +Qualcomm Universal Peripheral (QUP) I2C controller + +Required properties: + - compatible: Should be: + * "qcom,i2c-qup-v1.1.1" for 8660, 8960 and 8064. + * "qcom,i2c-qup-v2.1.1" for 8974 v1. + * "qcom,i2c-qup-v2.2.1" for 8974 v2 and later. + - reg: Should contain QUP register address and length. + - interrupts: Should contain I2C interrupt. + + - clocks: A list of phandles + clock-specifiers, one for each entry in + clock-names. + - clock-names: Should contain: + * "core" for the core clock + * "iface" for the AHB clock + + - #address-cells: Should be <1> Address cells for i2c device address + - #size-cells: Should be <0> as i2c addresses have no size component + +Optional properties: + - clock-frequency: Should specify the desired i2c bus clock frequency in Hz, + defaults to 100kHz if omitted. + +Child nodes should conform to i2c bus binding. + +Example: + + i2c at f9924000 { + compatible = "qcom,i2c-qup-v2.2.1"; + reg = <0xf9924000 0x1000>; + interrupts = <0 96 0>; + + clocks = <&gcc GCC_BLSP1_QUP2_I2C_APPS_CLK>, <&gcc GCC_BLSP1_AHB_CLK>; + clock-names = "core", "iface"; + + clock-frequency = <355000>; + + #address-cells = <1>; + #size-cells = <0>; + + dummy at 60 { + compatible = "dummy"; + reg = <0x60>; + }; + }; +
--
1.7.9.5