i2c-designware: make SDA hold time configurable

This patch makes the SDA hold time configurable through device tree.

Signed-off-by: Christian Ruppert <christian.ruppert@abilis.com>
Signed-off-by: Pierrick Hascoet <pierrick.hascoet@abilis.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com> for arch/arc bits
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

1 files changed, 15 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/i2c/i2c-designware.txt b/Documentation/devicetree/bindings/i2c/i2c-designware.txt
index e42a2ee233e6..7fd7fa25e9b0 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-designware.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-designware.txt
@@ -10,6 +10,10 @@ Recommended properties :
 
  - clock-frequency : desired I2C bus clock frequency in Hz.
 
+Optional properties :
+ - i2c-sda-hold-time-ns : should contain the SDA hold time in nanoseconds.
+   This option is only supported in hardware blocks version 1.11a or newer.
+
 Example :
 
         i2c@f0000 {
@@ -20,3 +24,14 @@ Example :
                 interrupts = <11>;
                 clock-frequency = <400000>;
         };
+
+        i2c@1120000 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                compatible = "snps,designware-i2c";
+                reg = <0x1120000 0x1000>;
+                interrupt-parent = <&ictl>;
+                interrupts = <12 1>;
+                clock-frequency = <400000>;
+                i2c-sda-hold-time-ns = <300>;
+        };