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-rw-r--r--board/plankton/board.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/board/plankton/board.h b/board/plankton/board.h
index e5a036e7fe..323143bcd3 100644
--- a/board/plankton/board.h
+++ b/board/plankton/board.h
@@ -24,6 +24,7 @@
#define CONFIG_ADC
#define CONFIG_HW_CRC
#define CONFIG_I2C
+#define CONFIG_IO_EXPANDER_PCA9534
#undef CONFIG_WATCHDOG_HELP
#undef CONFIG_LID_SWITCH
#undef CONFIG_TASK_PROFILING