From: Wenyou Yang <wenyou.yang@xxxxxxxxx>
Add a DT property "atmel,twd-hold-cycles" to specify the HOLD
filed of TWIHS_CWGR register to increase the TWD hold time.
Signed-off-by: Wenyou Yang <wenyou.yang@xxxxxxxxx>
Signed-off-by: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
---
Documentation/devicetree/bindings/i2c/i2c-at91.txt | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/Documentation/devicetree/bindings/i2c/i2c-at91.txt b/Documentation/devicetree/bindings/i2c/i2c-at91.txt
index 6e81dc1..c81a0cb 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-at91.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-at91.txt
@@ -17,6 +17,9 @@ Optional properties:
- dma-names: should contain "tx" and "rx".
- atmel,fifo-size: maximum number of data the RX and TX FIFOs can store for FIFO
capable I2C controllers.
+- atmel,twd-hold-cycles: number of cycles for TWD hold time whose value is
+ determinated by (atmel,twd-hold-cycles + 3) x t_peripheral_clock,
+ maximum value is 0x1f.
- Child nodes conforming to i2c bus binding
Examples :
@@ -29,6 +32,7 @@ i2c0: i2c@fff84000 {
#size-cells = <0>;
clocks = <&twi0_clk>;
clock-frequency = <400000>;
+ atmel,twd-hold-cycles = <2>;
24c512@50 {
compatible = "24c512";
--
2.5.0
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