From 174cafc31a7e705fc54c175c667811aece1d9df3 Mon Sep 17 00:00:00 2001
From: Peter Harper <77111776+peterharperuk@users.noreply.github.com>
Date: Wed, 23 Apr 2025 20:02:06 +0100
Subject: [PATCH] Add CYW43_WL_GPIO_SMPS_PIN for pico_w and pico2_w (#2410)

Fixes #2361
---
 src/boards/include/boards/pico2_w.h | 6 ++++++
 src/boards/include/boards/pico_w.h  | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/src/boards/include/boards/pico2_w.h b/src/boards/include/boards/pico2_w.h
index 74f5a739..32bc4a53 100644
--- a/src/boards/include/boards/pico2_w.h
+++ b/src/boards/include/boards/pico2_w.h
@@ -89,6 +89,12 @@ pico_board_cmake_set_default(PICO_FLASH_SIZE_BYTES, (4 * 1024 * 1024))
 #define CYW43_WL_GPIO_LED_PIN 0
 #endif
 
+// Drive high to force power supply into PWM mode (lower ripple on 3V3 at light loads)
+// As this is a CYW43 pin you can do this by calling cyw43_gpio_set
+#ifndef CYW43_WL_GPIO_SMPS_PIN
+#define CYW43_WL_GPIO_SMPS_PIN 1
+#endif
+
 // If CYW43_WL_GPIO_VBUS_PIN is defined then a CYW43 GPIO has to be used to read VBUS.
 // This can be passed to cyw43_arch_gpio_get to determine if the device is battery powered.
 // PICO_VBUS_PIN and CYW43_WL_GPIO_VBUS_PIN should not both be defined.
diff --git a/src/boards/include/boards/pico_w.h b/src/boards/include/boards/pico_w.h
index 6e825f68..670cb305 100644
--- a/src/boards/include/boards/pico_w.h
+++ b/src/boards/include/boards/pico_w.h
@@ -94,6 +94,12 @@ pico_board_cmake_set_default(PICO_FLASH_SIZE_BYTES, (2 * 1024 * 1024))
 #define CYW43_WL_GPIO_LED_PIN 0
 #endif
 
+// Drive high to force power supply into PWM mode (lower ripple on 3V3 at light loads)
+// As this is a CYW43 pin you can do this by calling cyw43_gpio_set
+#ifndef CYW43_WL_GPIO_SMPS_PIN
+#define CYW43_WL_GPIO_SMPS_PIN 1
+#endif
+
 // If CYW43_WL_GPIO_VBUS_PIN is defined then a CYW43 GPIO has to be used to read VBUS.
 // This can be passed to cyw43_arch_gpio_get to determine if the device is battery powered.
 // PICO_VBUS_PIN and CYW43_WL_GPIO_VBUS_PIN should not both be defined.