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dt-bindings: i2c-msm-v2: Add snapshot of I2C MSM V2 driver

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This change adds a snapshot of I2C MSM V2 driver from the 4.14
branch. kernel-4.14 baseline: 'commit 2aa77f468a3d
("i2c-msm-v2: Replace HW recovery mechanism with SW bit-banging")'.

Change-Id: Ia0604ce27bdf29018b911d7ab2baa3e70d70b31f
This commit is contained in:
Vipin Deep Kaur 2020-09-24 14:09:36 +05:30 • committed by Chandana Kishori Chiluveru
commit 7eebba22cf
1 changed files with 59 additions and 0 deletions
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59
bindings/i2c/i2c-msm-v2.txt Normal file
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Qualcomm Technologies, Inc. I2C controller
Required properties:
- reg : Offset and length of the register region for the device named in
reg-names and has the same index.
- reg-names : Register region name(s) referenced in reg above
"qup_phys_addr" : Physical address of QUP register space.
- compatible : should be "qcom,i2c-msm-v2"
- interrupts : Interrupt number which correspond to the entry with the same
index in interrupt-names.
- interrupt-names: QUP core interrupt name(s) referenced in interrupts above
"qup_irq" : QUP interrupt used by the controller.
- dmas : DMA engine API's parameters for blsp.
<[phandle of the dma controller] [pipe index] [number of descriptors]
[sps_connect flags] [sps_register_event flags]>;
- dma-names : dma channel names.
- qcom,clk-freq-out : Desired I2C bus clock frequency in Hz
- qcom,clk-freq-in : Supplied core clock frequency in Hz.
- qcom,i2c-dat : specifies GPIO which corresponds to the I2C data line.
- qcom,i2c-clk : specifies GPIO which corresponds to the I2C clock line.
Required alias:
- The desired bus-number is specified by an alias with the following format:
'i2c{n}' where n is the bus number.
Optional property:
- qcom,noise-rjct-scl : number of low samples on clock line to consider it low.
When missing default to 0.
- qcom,noise-rjct-sda : number of low samples on data line to consider it low.
When missing default to 0.
- qcom,disable-dma : disables DMA transfer mode.
- qcom,master-id : Master-port value used on voting for the clock path.
- qcom,high-time-clk-div : high time divider value to configure clk-ctl
register. When missing, default to the value given in driver.
- qcom,fs-clk-div: fs divider value to configure clk-ctl register. When
missing, default to the value given in driver.
Example:
aliases {
i2c10 = &i2c_10;
};
i2c_10: i2c@f9966000 {
compatible = "qcom,i2c-msm-v2";
reg-names = "qup_phys_addr", "dma_phys_addr";
reg = <0xf9966000 0x1000>;
interrupt-names = "qup_irq";
interrupts = <0 104 0>;
dmas = <&dma_blsp1 14 32 0x20000020 0x20>,
<&dma_blsp1 15 64 0x20000020 0x20>;
dma-names = "tx", "rx";
qcom,clk-freq-out = <100000>;
qcom,clk-freq-in = <24000000>;
qcom,noise-rjct-scl = <0>;
qcom,noise-rjct-sda = <0>;
qcom,i2c-dat = <&tlmm 67 0x00>;
qcom,i2c-clk = <&tlmm 68 0x00>;
};