From f5622afeb687b3e57d9b39942c0e98968a0b58b7 Mon Sep 17 00:00:00 2001
From: Benjamin Valentin <benjamin.valentin@ml-pa.com>
Date: Wed, 28 Jul 2021 11:51:47 +0200
Subject: [PATCH] boards/saml21-xpro: configure UART & SPI on EXT2, 3

---
 boards/saml21-xpro/include/periph_conf.h | 34 +++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/boards/saml21-xpro/include/periph_conf.h b/boards/saml21-xpro/include/periph_conf.h
index 7c228dee17..68fc0d5c8b 100644
--- a/boards/saml21-xpro/include/periph_conf.h
+++ b/boards/saml21-xpro/include/periph_conf.h
@@ -94,12 +94,27 @@ static const uart_conf_t uart_config[] = {
         .tx_pad   = UART_PAD_TX_0,
         .flags    = UART_FLAG_NONE,
         .gclk_src = SAM0_GCLK_MAIN,
+    },
+    {    /* EXT2 header */
+        .dev      = &SERCOM1->USART,
+        .rx_pin   = GPIO_PIN(PA, 19),
+        .tx_pin   = GPIO_PIN(PA, 18),
+#ifdef MODULE_PERIPH_UART_HW_FC
+        .rts_pin  = GPIO_UNDEF,
+        .cts_pin  = GPIO_UNDEF,
+#endif
+        .mux      = GPIO_MUX_C,
+        .rx_pad   = UART_PAD_RX_3,
+        .tx_pad   = UART_PAD_TX_2,
+        .flags    = UART_FLAG_NONE,
+        .gclk_src = SAM0_GCLK_MAIN,
     }
 };
 
 /* interrupt function name mapping */
 #define UART_0_ISR          isr_sercom3
 #define UART_1_ISR          isr_sercom4
+#define UART_2_ISR          isr_sercom1
 
 #define UART_NUMOF          ARRAY_SIZE(uart_config)
 /** @} */
@@ -138,7 +153,7 @@ static const pwm_conf_t pwm_config[] = {
  * @{
  */
 static const spi_conf_t spi_config[] = {
-    {
+    {    /* EXT1 header */
         .dev      = &(SERCOM0->SPI),
         .miso_pin = GPIO_PIN(PA, 4),
         .mosi_pin = GPIO_PIN(PA, 6),
@@ -152,6 +167,23 @@ static const spi_conf_t spi_config[] = {
 #ifdef MODULE_PERIPH_DMA
         .tx_trigger = SERCOM0_DMAC_ID_TX,
         .rx_trigger = SERCOM0_DMAC_ID_RX,
+#endif
+    },
+    {    /* EXT2, EXT3 header */
+        .dev      = &(SERCOM5->SPI),
+        .miso_pin = GPIO_PIN(PB, 16),
+        .mosi_pin = GPIO_PIN(PB, 22),
+        .clk_pin  = GPIO_PIN(PB, 23),
+        .miso_mux = GPIO_MUX_C,
+        .mosi_mux = GPIO_MUX_D,
+        .clk_mux  = GPIO_MUX_D,
+        .miso_pad = SPI_PAD_MISO_0,
+        .mosi_pad = SPI_PAD_MOSI_2_SCK_3,
+        .gclk_src = SAM0_GCLK_MAIN,
+#ifdef MODULE_PERIPH_DMA
+        /* no DMA on SERCOM5 */
+        .tx_trigger = DMA_TRIGGER_DISABLED,
+        .rx_trigger = DMA_TRIGGER_DISABLED,
 #endif
     }
 };