drivers: spi: esp32: add esp32c3 support

to the esp32 spi unified driver

Signed-off-by: Felipe Neves <[email protected]>

Author: Felipe Neves

boards/riscv/esp32c3_devkitm/esp32c3_devkitm.dts

@@ -41,6 +41,16 @@
 	status = "okay";
 };
 
+&spi2 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+	miso-pin = <2>;
+	mosi-pin = <7>;
+	sclk-pin = <6>;
+	csel-pin = <10>;
+};
+
 &gpio0 {
 	status = "okay";
 };

drivers/spi/Kconfig.esp32

@@ -5,7 +5,7 @@
 
 menuconfig ESP32_SPIM
 	bool "ESP32 SPI Master driver"
-	depends on SOC_ESP32 || SOC_ESP32S2
+	depends on SOC_ESP32 || SOC_ESP32S2 || SOC_ESP32C3
 	default y
 	help
 	  Enables support for ESP32 SPI Master driver.

drivers/spi/spi_esp32_spim.c

@@ -15,7 +15,11 @@ LOG_MODULE_REGISTER(esp32_spi, CONFIG_SPI_LOG_LEVEL);
 
 #include <soc.h>
 #include <drivers/spi.h>
+#ifndef CONFIG_SOC_ESP32C3
 #include <drivers/interrupt_controller/intc_esp32.h>
+#else
+#include <drivers/interrupt_controller/intc_esp32c3.h>
+#endif
 #include <drivers/gpio/gpio_esp32.h>
 #include <drivers/clock_control.h>
 #include "spi_context.h"
@@ -40,6 +44,17 @@ LOG_MODULE_REGISTER(esp32_spi, CONFIG_SPI_LOG_LEVEL);
 #define SCLK_IDX_3 SPI3_CLK_OUT_MUX_IDX
 #define CSEL_IDX_2 FSPICS0_OUT_IDX
 #define CSEL_IDX_3 SPI3_CS0_OUT_IDX
+#elif defined(CONFIG_SOC_ESP32C3)
+#define MISO_IDX_2 FSPIQ_IN_IDX
+#define MOSI_IDX_2 FSPID_OUT_IDX
+#define SCLK_IDX_2 FSPICLK_OUT_IDX
+#define CSEL_IDX_2 FSPICS0_OUT_IDX
+#endif
+
+#ifdef CONFIG_SOC_ESP32C3
+#define ISR_HANDLER isr_handler_t
+#else
+#define ISR_HANDLER intr_handler_t
 #endif
 
 static bool spi_esp32_transfer_ongoing(struct spi_esp32_data *data)
@@ -124,7 +139,11 @@ static int spi_esp32_init(const struct device *dev)
 	}
 
 #ifdef CONFIG_SPI_ESP32_INTERRUPT
-	data->irq_line = esp_intr_alloc(cfg->irq_source, 0, spi_esp32_isr, (void *)dev, NULL);
+	data->irq_line = esp_intr_alloc(cfg->irq_source,
+			0,
+			(ISR_HANDLER)spi_esp32_isr,
+			(void *)dev,
+			NULL);
 #endif
 
 	spi_context_unlock_unconditionally(&data->ctx);

dts/riscv/espressif/esp32c3.dtsi

@@ -129,6 +129,17 @@
 			label = "TRNG_0";
 			status = "disabled";
 		};
+
+		spi2: spi@60024000 {
+			compatible = "espressif,esp32-spi";
+			reg = <0x60024000 DT_SIZE_K(4)>;
+			interrupts = <SPI2_INTR_SOURCE>;
+			interrupt-parent = <&intc>;
+			label = "SPI_2";
+			clocks = <&rtc ESP32_SPI2_MODULE>;
+			status = "disabled";
+			use-iomux;
+		};
 	};
 
 };

tests/drivers/spi/spi_loopback/boards/esp32c3_devkitm.conf

@@ -0,0 +1,2 @@
+CONFIG_SPI_LOOPBACK_DRV_NAME="SPI_2"
+CONFIG_SPI_ESP32_INTERRUPT=y

west.yml

@@ -67,7 +67,7 @@ manifest:
       groups:
         - hal
     - name: hal_espressif
-      revision: 7c46a3fc5b336199392cba0f66c3c27d5fe9025c
+      revision: 8284e0c251a6450f9cdeff299988a647648296e3
       path: modules/hal/espressif
       west-commands: west/west-commands.yml
       groups: