Changes between Version 6 and Version 7 of I2C

Timestamp:

01/30/2026 12:26:24 AM (94 minutes ago)

Author:

Ryan Erbstoesser

Comment:

add note for example for i2c clock

I2C

@@ -44 +44 @@
 See [wiki:linux/i2c]
 
+
+== Troubleshooting
+
+For example, the Gateworks GW72xx off-board I2C is pre-configured for a 400khz clock in the device tree. However, many devices may be running on a 100khz clock. To test the 100khz clock, use a fixfdt script in the bootloader to alter the device tree on boot.
+
+GW72xx Example:
+{{{
+setenv fixfdt 'fdt addr ${fdt_addr}; fdt resize; fdt set /soc@0/bus@30800000/i2c@30a40000 clock-frequency <100000>'
+saveenv
+boot
+}}}
+