[PATCH v1 1/2] dt-bindings: i2c-stm32: SYSCFG Fast Mode Plus support for I2C STM32F7

Pierre-Yves MORDRET
2018-11-16T12:20:21Z

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>
---
Version history:
v1:
* Initial
---
---
Documentation/devicetree/bindings/i2c/i2c-stm32.txt | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/i2c-stm32.txt b/Documentation/devicetree/bindings/i2c/i2c-stm32.txt
index 3b54899..69240e1 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-stm32.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-stm32.txt
@@ -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>;
};
--
2.7.4