path: root/dts/Bindings/mfd/cros-ec.txt
diff options
Diffstat (limited to 'dts/Bindings/mfd/cros-ec.txt')
1 files changed, 4 insertions, 0 deletions
diff --git a/dts/Bindings/mfd/cros-ec.txt b/dts/Bindings/mfd/cros-ec.txt
index 8009c3d87f..1777916e9e 100644
--- a/dts/Bindings/mfd/cros-ec.txt
+++ b/dts/Bindings/mfd/cros-ec.txt
@@ -18,6 +18,10 @@ Required properties (SPI):
- reg: SPI chip select
Optional properties (SPI):
+- google,cros-ec-spi-pre-delay: Some implementations of the EC need a little
+ time to wake up from sleep before they can receive SPI transfers at a high
+ clock rate. This property specifies the delay, in usecs, between the
+ assertion of the CS to the start of the first clock pulse.
- google,cros-ec-spi-msg-delay: Some implementations of the EC require some
additional processing time in order to accept new transactions. If the delay
between transactions is not long enough the EC may not be able to respond