drivers: spi: Add SPI device support for Apollo3 SoCs

This commit adds spi device support for Apollo3 SoCs.

Signed-off-by: Hao Luo <[email protected]>

Author: AlessandroLuo

boards/ambiq/apollo3_evb/apollo3_evb-pinctrl.dtsi

@@ -65,7 +65,11 @@
 			bias-pull-up;
 		};
 	};
-
+	spid0_default: spid0_default {
+		group1 {
+			pinmux = <SLSCK_P0>, <SLMISO_P2>, <SLMOSI_P1>, <SLNCE_P3>;
+		};
+	};
 	spi0_default: spi0_default {
 		group1 {
 			pinmux = <M0SCK_P5>, <M0MISO_P6>, <M0MOSI_P7>;

boards/ambiq/apollo3p_evb/apollo3p_evb-pinctrl.dtsi

@@ -65,7 +65,11 @@
 			bias-pull-up;
 		};
 	};
-
+	spid0_default: spid0_default {
+		group1 {
+			pinmux = <SLSCK_P0>, <SLMISO_P2>, <SLMOSI_P1>, <SLNCE_P3>;
+		};
+	};
 	spi0_default: spi0_default {
 		group1 {
 			pinmux = <M0SCK_P5>, <M0MISO_P6>, <M0MOSI_P7>;

drivers/spi/CMakeLists.txt

@@ -46,7 +46,8 @@ zephyr_library_sources_ifdef(CONFIG_SPI_PW		spi_pw.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_SMARTBOND   spi_smartbond.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_OPENTITAN	spi_opentitan.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_NUMAKER		spi_numaker.c)
-zephyr_library_sources_ifdef(CONFIG_SPI_AMBIQ		spi_ambiq.c)
+zephyr_library_sources_ifdef(CONFIG_SPI_AMBIQ_SPIC	spi_ambiq_spic.c)
+zephyr_library_sources_ifdef(CONFIG_SPI_AMBIQ_SPID	spi_ambiq_spid.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_AMBIQ_BLEIF	spi_ambiq_bleif.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_RPI_PICO_PIO	spi_rpi_pico_pio.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_MCHP_MSS	spi_mchp_mss.c)

drivers/spi/Kconfig.ambiq

@@ -6,21 +6,21 @@
 # SPDX-License-Identifier: Apache-2.0
 #
 
-menuconfig SPI_AMBIQ
-	bool "AMBIQ SPI driver"
+menuconfig SPI_AMBIQ_SPIC
+	bool "AMBIQ SPI Controller driver"
 	default y
 	depends on DT_HAS_AMBIQ_SPI_ENABLED
 	select GPIO
 	select AMBIQ_HAL
-	select AMBIQ_HAL_USE_SPI
+	select AMBIQ_HAL_USE_SPIC
 	help
-	  Enable driver for Ambiq SPI.
+	  Enable driver for Ambiq SPI in Controller mode.
 
-if SPI_AMBIQ
+if SPI_AMBIQ_SPIC
 
 config SPI_AMBIQ_DMA
 	bool "AMBIQ APOLLO SPI DMA Support"
-	depends on SPI_AMBIQ
+	depends on SPI_AMBIQ_SPIC
 	help
 	  Enable DMA for Ambiq SPI.
 
@@ -31,7 +31,17 @@ config SPI_DMA_TCB_BUFFER_SIZE
 	help
 	  DMA Transfer Control Buffer size in words
 
-endif # SPI_AMBIQ
+endif # SPI_AMBIQ_SPIC
+
+config SPI_AMBIQ_SPID
+	bool "AMBIQ SPI Device driver"
+	default y
+	depends on DT_HAS_AMBIQ_SPID_ENABLED
+	select GPIO
+	select AMBIQ_HAL
+	select AMBIQ_HAL_USE_SPID
+	help
+	  Enable driver for Ambiq SPI in Device mode.
 
 config SPI_AMBIQ_BLEIF
 	bool "AMBIQ SPI-BLEIF driver"

drivers/spi/spi_ambiq.c renamed to drivers/spi/spi_ambiq_spic.c

@@ -170,7 +170,7 @@ static int spi_config(const struct device *dev, const struct spi_config *config)
 	}
 
 	if (config->operation & SPI_OP_MODE_SLAVE) {
-		LOG_ERR("Slave mode not supported");
+		LOG_ERR("Device mode not supported");
 		return -ENOTSUP;
 	}
 	if (config->operation & SPI_MODE_LOOP) {
@@ -183,7 +183,8 @@ static int spi_config(const struct device *dev, const struct spi_config *config)
 		return -ENOTSUP;
 	}
 
-	/* Select slower of two: SPI bus frequency for SPI device or SPI master clock frequency */
+	/* Select slower of two: SPI bus frequency for SPI device or SPI controller clock frequency
+	 */
 	data->iom_cfg.ui32ClockFreq =
 		(config->frequency ? MIN(config->frequency, cfg->clock_freq) : cfg->clock_freq);
 	ctx->config = config;