From b9a378c1ca630ba72d19640e7dee2ec4aec971ea Mon Sep 17 00:00:00 2001
From: Kevin O'Connor <kevin@koconnor.net>
Date: Thu, 17 Nov 2022 14:38:41 -0500
Subject: [PATCH] rp2040: Fix boundary check for max gpio pin

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
---
 src/rp2040/gpio.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/rp2040/gpio.c b/src/rp2040/gpio.c
index bac67d23..98e07789 100644
--- a/src/rp2040/gpio.c
+++ b/src/rp2040/gpio.c
@@ -48,7 +48,7 @@ mask_to_pin(uint32_t mask)
 struct gpio_out
 gpio_out_setup(uint8_t pin, uint8_t val)
 {
-    if (pin > 30)
+    if (pin >= 30)
         goto fail;
     struct gpio_out g = { .bit=1<<pin };
     gpio_out_reset(g, val);
@@ -93,7 +93,7 @@ gpio_out_write(struct gpio_out g, uint8_t val)
 struct gpio_in
 gpio_in_setup(uint8_t pin, int8_t pull_up)
 {
-    if (pin > 30)
+    if (pin >= 30)
         goto fail;
     struct gpio_in g = { .bit=1<<pin };
     gpio_in_reset(g, pull_up);