mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-22 10:34:55 +08:00
6128440502
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@mm-sol.com>
[bjorn: reformulated part of binding description
added version to compatible
cleaned up example]
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Acked-by: Rob Herring <robh@kernel.org>
[wsa: removed the dummy child node which was a confusing example]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
41 lines
1.1 KiB
Plaintext
41 lines
1.1 KiB
Plaintext
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@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>;
|
|
};
|