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dt-bindings: i2c-stm32: SYSCFG Fast Mode Plus support for I2C STM32F7 

Append optional bindings to update SYSCFG Fast Mode Plus bits if
Fast Mode Plus speed is selected.

Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Pierre-Yves MORDRET 2018-11-19 12:03:31 +01:00 committed by Wolfram Sang
parent e79ba3b550
commit 9d9aa7ec7b
1 changed files with 6 additions and 0 deletions
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6
Documentation/devicetree/bindings/i2c/i2c-stm32.txt
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@ -26,6 +26,11 @@ Optional properties :
- i2c-scl-falling-time-ns : Only for STM32F7, I2C SCL Falling time for the board
(default: 10)
I2C Timings are derived from these 2 values
- st,syscfg-fmp: Only for STM32F7, use to set Fast Mode Plus bit within SYSCFG
whether Fast Mode Plus speed is selected by slave.
1st cell : phandle to syscfg
2nd cell : register offset within SYSCFG
3rd cell : register bitmask for FMP bit
Example :
@ -53,4 +58,5 @@ Example :
clocks = <&rcc 1 CLK_I2C1>;
pinctrl-0 = <&i2c1_sda_pin>, <&i2c1_scl_pin>;
pinctrl-names = "default";
st,syscfg-fmp = <&syscfg 0x4 0x1>;
};