drivers: spi: gecko: Add new driver for SPI communication via EUSART

boards/sparkfun/thing_plus_matter_mgm240p/board.c

@@ -51,6 +51,9 @@ static int sparkfun_thing_plus_mgm240p_init_clocks(void)
 #endif
 #if defined(_CMU_EM01GRPBCLKCTRL_MASK)
 	CMU_ClockSelectSet(cmuClock_EM01GRPBCLK, cmuSelect_HFRCODPLL);
+#endif
+#if defined(_CMU_EM01GRPCCLKCTRL_MASK)
+	CMU_ClockSelectSet(cmuClock_EM01GRPCCLK, cmuSelect_HFRCODPLL);
 #endif
 	CMU_ClockSelectSet(cmuClock_EM23GRPACLK, cmuSelect_LFRCO);
 	CMU_ClockSelectSet(cmuClock_EM4GRPACLK, cmuSelect_LFRCO);

boards/sparkfun/thing_plus_matter_mgm240p/doc/index.rst

@@ -1,6 +1,6 @@
 .. _sparkfun_thing_plus_mgm240p:
 
-SPARKFUN THING PLUS MATTER
+SparkFun Thing Plus Matter
 ###########################
 
 Overview
@@ -15,7 +15,7 @@ ARM Cortex®-M33F processor with excellent low power capabilities.
    :align: center
    :alt: MGM240P Sparkfun Think Plus Matter
 
-   xG24-MGM240P (image courtesy of Sparkfun)
+   MGM240P Sparkfun Think Plus Matter (image courtesy of Sparkfun)
 
 Hardware
 ********
@@ -81,7 +81,7 @@ means Pin number 2 on PORTA, as used in the board's datasheets and manuals.
 +-------+-------------+-------------------------------------+
 
 The default configuration can be found in
-:zephyr_file:`boards/silabs/sparkfun_thing_plus_mgm240p/sparkfun_thing_plus_mgm240p_defconfig`
+:zephyr_file:`boards/silabs/sparkfun_thing_plus_matter_mgm240p/sparkfun_thing_plus_matter_mgm240p_defconfig`
 
 System Clock
 ============
@@ -128,7 +128,7 @@ terminal session:
 
 .. code-block:: console
 
-   Hello World! _sparkfun_thing_plus_mgm240p
+   Hello World! _sparkfun_thing_plus_matter_mgm240p
 
 Bluetooth
 =========
@@ -146,7 +146,7 @@ this example.
 
 .. zephyr-app-commands::
    :zephyr-app: samples/bluetooth/observer
-   :board: sparkfun_thing_plus_mgm240p
+   :board: sparkfun_thing_plus_matter_mgm240p
    :goals: build
 
 .. _EFR32MG24 Website:

boards/sparkfun/thing_plus_matter_mgm240p/sparkfun_thing_plus_matter_mgm240p-pinctrl.dtsi

@@ -18,6 +18,15 @@
 		};
 	};
 
+	eusart1_default: eusart1_default {
+		group1 {
+			psels = <GECKO_PSEL(SPI_SCK, C, 2)>,
+				<GECKO_PSEL(SPI_MISO, C, 3)>,
+				<GECKO_PSEL(SPI_MOSI, C, 6)>,
+				<GECKO_PSEL(SPI_CSN, A, 7)>;
+		};
+	};
+
 	i2c0_default: i2c0_default {
 		group1 {
 			psels = <GECKO_PSEL(I2C_SDA, B, 3)>,

boards/sparkfun/thing_plus_matter_mgm240p/sparkfun_thing_plus_matter_mgm240p.dts

@@ -25,6 +25,7 @@
 
 	aliases {
 		led0 = &blue_led;
+		spi0 = &eusart1;
 		watchdog0 = &wdog0;
 	};
 
@@ -53,6 +54,18 @@
 	pinctrl-names = "default";
 	status = "okay";
 };
+
+&eusart1 {
+	compatible = "silabs,gecko-spi-eusart";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+	pinctrl-0 = <&eusart1_default>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+
 &i2c0 {
 	pinctrl-0 = <&i2c0_default>;
 	pinctrl-names = "default";

boards/sparkfun/thing_plus_matter_mgm240p/sparkfun_thing_plus_matter_mgm240p.yaml

@@ -14,6 +14,7 @@ supported:
   - uart
   - spi
   - watchdog
+  - clock_control
 testing:
   ignore_tags:
     - net

drivers/pinctrl/pinctrl_gecko.c

@@ -24,6 +24,11 @@ int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt, uintp
 	(void)base;
 #endif /*USART_COUNT > 1*/
 
+#ifdef CONFIG_SPI_GECKO_EUSART
+	EUSART_TypeDef *ebase = (EUSART_TypeDef *)reg;
+	int eusart_num = EUSART_NUM(ebase);
+#endif
+
 #endif
 
 #ifdef CONFIG_I2C_GECKO
@@ -171,7 +176,53 @@ int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt, uintp
 #endif /* CONFIG_SOC_FAMILY_SILABS_S1 */
 #endif /* CONFIG_UART_GECKO */
 
-#ifdef CONFIG_SPI_GECKO
+#ifdef CONFIG_SPI_GECKO_EUSART
+		case GECKO_FUN_SPI_SCK:
+			pin_config.mode = gpioModePushPull;
+			pin_config.out = 1;
+			GPIO->EUSARTROUTE[eusart_num].SCLKROUTE =
+				(pin_config.port << _GPIO_EUSART_SCLKROUTE_PORT_SHIFT) |
+				(pin_config.pin << _GPIO_EUSART_SCLKROUTE_PIN_SHIFT);
+			GPIO->EUSARTROUTE[eusart_num].ROUTEEN |= GPIO_EUSART_ROUTEEN_SCLKPEN;
+			GPIO_PinModeSet(pin_config.port, pin_config.pin, pin_config.mode,
+					pin_config.out);
+			break;
+
+		case GECKO_FUN_SPI_CSN:
+			pin_config.mode = gpioModePushPull;
+			pin_config.out = 1;
+			GPIO->EUSARTROUTE[eusart_num].CSROUTE =
+				(pin_config.port << _GPIO_EUSART_CSROUTE_PORT_SHIFT) |
+				(pin_config.pin << _GPIO_EUSART_CSROUTE_PIN_SHIFT);
+			GPIO->EUSARTROUTE[eusart_num].ROUTEEN |= GPIO_EUSART_ROUTEEN_CSPEN;
+			GPIO_PinModeSet(pin_config.port, pin_config.pin, pin_config.mode,
+					pin_config.out);
+			break;
+
+		case GECKO_FUN_SPI_MOSI:
+			pin_config.mode = gpioModePushPull;
+			pin_config.out = 1;
+			GPIO->EUSARTROUTE[eusart_num].TXROUTE =
+				(pin_config.port << _GPIO_EUSART_TXROUTE_PORT_SHIFT) |
+				(pin_config.pin << _GPIO_EUSART_TXROUTE_PIN_SHIFT);
+			GPIO->EUSARTROUTE[eusart_num].ROUTEEN |= GPIO_EUSART_ROUTEEN_TXPEN;
+			GPIO_PinModeSet(pin_config.port, pin_config.pin, pin_config.mode,
+					pin_config.out);
+			break;
+
+		case GECKO_FUN_SPI_MISO:
+			pin_config.mode = gpioModeInput;
+			pin_config.out = 1;
+			GPIO->EUSARTROUTE[eusart_num].RXROUTE =
+				(pin_config.port << _GPIO_EUSART_RXROUTE_PORT_SHIFT) |
+				(pin_config.pin << _GPIO_EUSART_RXROUTE_PIN_SHIFT);
+			GPIO->EUSARTROUTE[EUSART_NUM(EUSART1)].ROUTEEN |= GPIO_EUSART_ROUTEEN_RXPEN;
+			GPIO_PinModeSet(pin_config.port, pin_config.pin, pin_config.mode,
+					pin_config.out);
+			break;
+#endif /*CONFIG_SPI_GECKO_EUSART*/
+
+#ifdef CONFIG_SPI_GECKO_USART
 #ifdef CONFIG_SOC_FAMILY_SILABS_S1
 		case GECKO_FUN_SPIM_SCK:
 			pin_config.mode = gpioModePushPull;
@@ -287,7 +338,7 @@ int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt, uintp
 					pin_config.out);
 			break;
 #endif /* CONFIG_SOC_FAMILY_SILABS_S1 */
-#endif /* CONFIG_SPI_GECKO */
+#endif /* CONFIG_SPI_GECKO_USART */
 
 #ifdef CONFIG_I2C_GECKO
 		case GECKO_FUN_I2C_SDA:

drivers/spi/CMakeLists.txt

@@ -28,7 +28,8 @@ zephyr_library_sources_ifdef(CONFIG_SPI_LITEX		spi_litex.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_LITEX_LITESPI	spi_litex_litespi.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_OC_SIMPLE	spi_oc_simple.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_XEC_QMSPI	spi_xec_qmspi.c)
-zephyr_library_sources_ifdef(CONFIG_SPI_GECKO		spi_gecko.c)
+zephyr_library_sources_ifdef(CONFIG_SPI_GECKO_USART		spi_gecko_usart.c)
+zephyr_library_sources_ifdef(CONFIG_SPI_GECKO_EUSART	spi_gecko_eusart.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_XLNX_AXI_QUADSPI spi_xlnx_axi_quadspi.c)
 zephyr_library_sources_ifdef(CONFIG_ESP32_SPIM		spi_esp32_spim.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_TEST		spi_test.c)

drivers/spi/Kconfig

@@ -111,7 +111,9 @@ source "drivers/spi/Kconfig.oc_simple"
 
 source "drivers/spi/Kconfig.xec_qmspi"
 
-source "drivers/spi/Kconfig.gecko"
+source "drivers/spi/Kconfig.gecko_usart"
+
+source "drivers/spi/Kconfig.gecko_eusart"
 
 source "drivers/spi/Kconfig.xlnx"
 

drivers/spi/Kconfig.gecko_eusart

@@ -0,0 +1,13 @@
+# Gecko SPI configuration option
+
+# Copyright (c) 2024 Daikin Comfort Technologies North America, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+config SPI_GECKO_EUSART
+	bool "Gecko EUSART SPI controller driver"
+	default y
+	depends on DT_HAS_SILABS_GECKO_SPI_EUSART_ENABLED
+	depends on GPIO
+	select SOC_GECKO_EUSART
+	help
+	  Enable the EUSART SPI peripherals on Gecko

drivers/spi/Kconfig.gecko → drivers/spi/Kconfig.gecko_usart

@@ -3,7 +3,7 @@
 # Copyright (c) 2019 Christian Taedcke <[email protected]>
 # SPDX-License-Identifier: Apache-2.0
 
-config SPI_GECKO
+config SPI_GECKO_USART
 	bool "Gecko SPI controller driver"
 	default y
 	depends on DT_HAS_SILABS_GECKO_SPI_USART_ENABLED