driver: gpio: mcp23xxx: increase reset pin pulse duration

The reset pulse is currently fixed at 1 µs, the minimum required for the chip. However, a long reset pin trace can increases rise time, making 1 µs potentially insufficient for reliable detection of a reset signal. Increase the pulse duration to 2 µs Signed-off-by: Igor Knippenberg <[email protected]>
zephyrproject-rtos · Jan 17, 2025 · a35fee8 · a35fee8
1 parent 2c89ed5
commit a35fee8
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/gpio/gpio_mcp23xxx.c b/drivers/gpio/gpio_mcp23xxx.c
@@ -23,7 +23,7 @@
 #include <zephyr/logging/log.h>
 LOG_MODULE_REGISTER(gpio_mcp23xxx);
 
-#define MCP23XXX_RESET_TIME_US 1
+#define MCP23XXX_RESET_TIME_US 2
 
 /**
  * @brief Reads given register from mcp23xxx.