From cbf06649aabc07ae7ccf48e3b0ed31ea7e6be29c Mon Sep 17 00:00:00 2001
From: Marian Buschsieweke <marian.buschsieweke@ml-pa.com>
Date: Tue, 1 Oct 2024 18:27:33 +0200
Subject: [PATCH] boards/common/arduino-zero: Add Arudino SPI mapping

The Arduino Zero based boards already provided the feature
`arduino_spi`, but were missing the corresponding mapping. This fixes
the issue by adding the SPI bus numbers for the ISP SPI bus and the
D11D12D13 SPI bus.

(And in order to actually add the D11D12D13 SPI bus, the `periph_conf.h`
was extended to provide an SPI configuration for it.)
---
 boards/common/arduino-zero/include/arduino_iomap.h | 14 ++++++++++++++
 boards/common/arduino-zero/include/periph_conf.h   | 12 ++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/boards/common/arduino-zero/include/arduino_iomap.h b/boards/common/arduino-zero/include/arduino_iomap.h
index 64f6a8b79e..f6696705bb 100644
--- a/boards/common/arduino-zero/include/arduino_iomap.h
+++ b/boards/common/arduino-zero/include/arduino_iomap.h
@@ -139,6 +139,20 @@ extern "C" {
 #define ARDUINO_PIN_9_PWM_CHAN  1
 /** @} */
 
+/**
+ * @name    Arduino's SPI buses
+ * @{
+ */
+/**
+ * @brief   SPI_DEV(0) is connected to the ISP
+ */
+#define ARDUINO_SPI_ISP         SPI_DEV(0)
+/**
+ * @brief   SPI_DEV(1) is connected to D11/D12/D13
+ */
+#define ARDUINO_SPI_D11D12D13   SPI_DEV(1)
+/** @} */
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/boards/common/arduino-zero/include/periph_conf.h b/boards/common/arduino-zero/include/periph_conf.h
index ee5d88dc1c..040e22d316 100644
--- a/boards/common/arduino-zero/include/periph_conf.h
+++ b/boards/common/arduino-zero/include/periph_conf.h
@@ -241,6 +241,18 @@ static const spi_conf_t spi_config[] = {
         .miso_pad = SPI_PAD_MISO_0,
         .mosi_pad = SPI_PAD_MOSI_2_SCK_3,
         .gclk_src = SAM0_GCLK_MAIN,
+    },
+    {
+        .dev      = &SERCOM1->SPI,
+        .miso_pin = GPIO_PIN(PA, 19),
+        .mosi_pin = GPIO_PIN(PA, 16),
+        .clk_pin  = GPIO_PIN(PA, 17),
+        .miso_mux = GPIO_MUX_C,
+        .mosi_mux = GPIO_MUX_C,
+        .clk_mux  = GPIO_MUX_C,
+        .miso_pad = SPI_PAD_MISO_3,
+        .mosi_pad = SPI_PAD_MOSI_0_SCK_1,
+        .gclk_src = SAM0_GCLK_MAIN,
     }
 };