galileorevh.md: add i2c frequency info

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

diff --git a/docs/galileorevh.md b/docs/galileorevh.md
index a9b3272..0f896bb 100644 (file)
--- a/docs/galileorevh.md
+++ b/docs/galileorevh.md
@@ -6,8 +6,11 @@ Application Processor, a 32-bit Intel Pentium-class system on a chip.
 
 The Gen 2 board has the following limitations in libmraa:
 
-- i2c is set at 400Khz speed cannot be changed without reloading kernel module
-- i2c bus is shared with multiple devices, scanning it usually fails
+- i2c is set at 400Khz speed cannot be changed without reloading kernel module,
+  the driver is intel_qrk_gip_i2c and the parameter is i2c_std_mode which must
+  be set to 1 in order to set the i2c bus speed to 100Khz
+- i2c bus is shared with multiple devices in kernel space, scanning it usually
+  fails
 - pwm period is set globally for all pwm channels, when changed this will halt
   all pwm channels
 - adc kernel module will return 12bit number but the ADC itself only has an