boards: pinmux: Don't throw compiler warnings on using custom sercom use

In order to use its serial peripheral SERCOMs SAMD socs require their
pins to be configured with pinmux. Currently pins are muxed only for the
boards' default serial interfaces. The pinmux code is written to throw
a compiler error if a user tries to use any sercom in a way it wasn't
pre-defined to be used.

This commit changes compiler errors to warnings so that user can provide
custom pinmuxing code in their app.

Fixes zephyrproject-rtos#23133

Signed-off-by: Kuba Sanak <contact@kuba.fyi>

boards/arm/adafruit_feather_m0_basic_proto/pinmux.c

@@ -22,19 +22,19 @@ static int board_pinmux_init(struct device *dev)
 #endif
 
 #if DT_ATMEL_SAM0_UART_SERCOM_1_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_2_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_3_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_4_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_5_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 
 #if DT_ATMEL_SAM0_SPI_SERCOM_4_BASE_ADDRESS
@@ -45,19 +45,19 @@ static int board_pinmux_init(struct device *dev)
 #endif
 
 #if DT_ATMEL_SAM0_SPI_SERCOM_0_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_1_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_2_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_3_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_5_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 
 #ifdef CONFIG_USB_DC_SAM0

boards/arm/adafruit_trinket_m0/pinmux.c

@@ -26,16 +26,16 @@ static int board_pinmux_init(struct device *dev)
 #endif
 
 #if DT_ATMEL_SAM0_UART_SERCOM_1_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_3_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_4_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_5_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 
 #if DT_ATMEL_SAM0_SPI_SERCOM_0_BASE_ADDRESS
@@ -52,16 +52,16 @@ static int board_pinmux_init(struct device *dev)
 #endif
 
 #if DT_ATMEL_SAM0_SPI_SERCOM_2_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_3_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_4_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_5_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 
 #ifdef CONFIG_USB_DC_SAM0

boards/arm/arduino_zero/pinmux.c

@@ -27,16 +27,16 @@ static int board_pinmux_init(struct device *dev)
 #endif
 
 #if DT_ATMEL_SAM0_UART_SERCOM_1_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_2_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_3_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_4_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 
 #if DT_ATMEL_SAM0_SPI_SERCOM_4_BASE_ADDRESS
@@ -47,19 +47,19 @@ static int board_pinmux_init(struct device *dev)
 #endif
 
 #if DT_ATMEL_SAM0_SPI_SERCOM_0_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_1_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_2_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_3_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_5_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 
 #ifdef CONFIG_USB_DC_SAM0

boards/arm/atsamd20_xpro/pinmux.c

@@ -15,13 +15,13 @@ static int board_pinmux_init(struct device *dev)
 	ARG_UNUSED(dev);
 
 #if DT_ATMEL_SAM0_UART_SERCOM_0_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_1_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_2_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_3_BASE_ADDRESS
 	/* SERCOM3 on RX=PA25, TX=PA24 */
@@ -33,7 +33,7 @@ static int board_pinmux_init(struct device *dev)
 	pinmux_pin_set(muxb,  9, PINMUX_FUNC_D);
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_5_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 
 #if DT_ATMEL_SAM0_SPI_SERCOM_0_BASE_ADDRESS
@@ -43,19 +43,19 @@ static int board_pinmux_init(struct device *dev)
 	pinmux_pin_set(muxa,  7, PINMUX_FUNC_D);
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_1_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_2_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_3_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_4_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_5_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 
 	return 0;

boards/arm/atsamd21_xpro/pinmux.c

@@ -25,34 +25,34 @@ static int board_pinmux_init(struct device *dev)
 	pinmux_pin_set(muxa, 16, PINMUX_FUNC_C);
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_2_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_3_BASE_ADDRESS
 	/* SERCOM3 ON RX=PA23, TX=PA22 */
 	pinmux_pin_set(muxa, 23, PINMUX_FUNC_C);
 	pinmux_pin_set(muxa, 22, PINMUX_FUNC_C);
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_4_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_5_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 
 #if DT_ATMEL_SAM0_SPI_SERCOM_0_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_1_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_2_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_3_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_4_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_5_BASE_ADDRESS
 	/* SPI SERCOM5 on MISO=PB16/pad 0, MOSI=PB22/pad 2, SCK=PB23/pad 3 */

boards/arm/atsame54_xpro/pinmux.c

@@ -21,43 +21,43 @@ static int board_pinmux_init(struct device *dev)
 	ARG_UNUSED(muxd);
 
 #if DT_ATMEL_SAM0_UART_SERCOM_0_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_1_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_2_BASE_ADDRESS
 	/* SERCOM2 ON RX=PB24, TX=PB25 */
 	pinmux_pin_set(muxb, 24, PINMUX_FUNC_D);
 	pinmux_pin_set(muxb, 25, PINMUX_FUNC_D);
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_3_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_4_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_5_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_6_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_UART_SERCOM_7_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 
 #if DT_ATMEL_SAM0_SPI_SERCOM_0_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_1_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_2_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_3_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_4_BASE_ADDRESS
 	/* SERCOM4 ON MOSI=PB27, MISO=PB29, SCK=PB26 */
@@ -66,35 +66,35 @@ static int board_pinmux_init(struct device *dev)
 	pinmux_pin_set(muxb, 29, PINMUX_FUNC_D);
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_5_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_6_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_SPI_SERCOM_7_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 
 #if DT_ATMEL_SAM0_I2C_SERCOM_0_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_I2C_SERCOM_1_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_I2C_SERCOM_2_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_I2C_SERCOM_3_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_I2C_SERCOM_4_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_I2C_SERCOM_5_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_I2C_SERCOM_6_BASE_ADDRESS
-#error Pin mapping is not configured
+#warning Pin mapping may not be configured
 #endif
 #if DT_ATMEL_SAM0_I2C_SERCOM_7_BASE_ADDRESS
 	pinmux_pin_set(muxd, 8, PINMUX_FUNC_C);