From: Keith Packard <keithp@keithp.com>
Date: Sun, 13 Nov 2022 03:38:56 +0000 (-0800)
Subject: fixup for exti restore
X-Git-Tag: 1.9.13~1^2~26^2~12
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=c450b5cd80534d067a760e5f0768f39a20604761

fixup for exti restore

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/samd21/samd21.h b/src/samd21/samd21.h
index 747f3ad5..b101c6b9 100644
--- a/src/samd21/samd21.h
+++ b/src/samd21/samd21.h
@@ -777,6 +777,16 @@ samd21_port_pmux_set(struct samd21_port *port, uint8_t pin, uint8_t func)
 			       (1 << SAMD21_PORT_PINCFG_PMUXEN));
 }
 
+static inline uint8_t
+samd21_port_pmux_get(struct samd21_port *port, uint8_t pin)
+{
+	uint8_t	byte = pin >> 1;
+	uint8_t bit = (pin & 1) << 2;
+	uint8_t mask = 0xf << bit;
+	uint8_t value = (uint8_t) ((port->pmux[byte] & mask) >> bit);
+	return value;
+}
+
 static inline void
 samd21_port_pmux_clr(struct samd21_port *port, uint8_t pin)
 {