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authorChristian Ruppert <christian.ruppert@abilis.com>2013-06-26 10:55:06 +0200
committerWolfram Sang <wsa@the-dreams.de>2013-06-26 16:02:06 +0200
commit9803f868944e879c4623c0d910e81f1ae89ccfb4 (patch)
tree1dc609539e707c857b7a3e38104a6b0063847a41 /Documentation
parent4c730a06c19bb83d2fa4308ee4cbb23abc84c9ca (diff)
downloadlinux-9803f868944e879c4623c0d910e81f1ae89ccfb4.tar.gz
linux-9803f868944e879c4623c0d910e81f1ae89ccfb4.tar.xz
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>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/i2c/i2c-designware.txt15
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>;
+ };