edison.md: add comment on tristate behaviour on edison

[contrib/mraa.git] / docs / minnow_max.md

diff --git a/docs/minnow_max.md b/docs/minnow_max.md
index b2d62dd..6d2bb51 100644 (file)
--- a/docs/minnow_max.md
+++ b/docs/minnow_max.md
@@ -12,6 +12,12 @@ Supported Firmware
 ------------------
 mraa has only been tested with 64 bit firmware version 0.73 or later.
 
+SPI
+---
+For SPI support you need to load the low_speed_spidev kernel module and that
+will create the /dev/spidev0.0 device node. Mraa only knows about this one SPI
+bus and no other.
+
 Interface notes
 ---------------
 The low speed I/O connector supported as per table below.  This assumes default
@@ -19,10 +25,8 @@ BIOS settings, as they are not dynamcially detected If any changes are mode
 (Device Manager -> System Setup -> South Cluster -> LPSS & CSS) them mraa calls
 will not behave as expected.
 
-Documentation shows i2c on bus #5, ACPI shows it on bus #6, but driver uses bus
-#7.
-
-**SPI operation is not currently supported**
+Documentation shows i2c on bus #5, ACPI shows it on bus #6, but driver uses
+bus #7.
 
 | MRAA Number | Physical Pin  | Function   | Sysfs GPIO | Notes                |
 |-------------|---------------|------------|------------|----------------------|