hal: renesas: ra: Add support Renesas r_sci_b_spi

drivers/ra/CMakeLists.txt

@@ -42,6 +42,8 @@ zephyr_library_sources_ifdef(CONFIG_USE_RA_FSP_SPI_B
 	fsp/src/r_spi_b/r_spi_b.c)
 zephyr_library_sources_ifdef(CONFIG_USE_RA_FSP_SPI
 	fsp/src/r_spi/r_spi.c)
+zephyr_library_sources_ifdef(CONFIG_USE_RA_FSP_SCI_B_SPI
+	fsp/src/r_sci_b_spi/r_sci_b_spi.c)
 zephyr_library_sources_ifdef(CONFIG_USE_RA_FSP_TIMER_ULPT
 	fsp/src/r_ulpt/r_ulpt.c)
 zephyr_library_sources_ifdef(CONFIG_USE_RA_FSP_LPM

drivers/ra/fsp/inc/instances/r_sci_b_spi.h

@@ -0,0 +1,118 @@
+/*
+* Copyright (c) 2020 - 2025 Renesas Electronics Corporation and/or its affiliates
+*
+* SPDX-License-Identifier: BSD-3-Clause
+*/
+
+#ifndef R_SCI_B_SPI_H
+#define R_SCI_B_SPI_H
+
+/***********************************************************************************************************************
+ * Includes
+ **********************************************************************************************************************/
+#include "r_spi_api.h"
+
+/* Common macro for FSP header files. There is also a corresponding FSP_FOOTER macro at the end of this file. */
+FSP_HEADER
+
+/*****************************************************************************************************************//**
+ * @ingroup SCI_B_SPI
+ * @{
+ ********************************************************************************************************************/
+
+/***********************************************************************************************************************
+ * Macro definitions
+ **********************************************************************************************************************/
+
+/***********************************************************************************************************************
+ * Typedef definitions
+ **********************************************************************************************************************/
+
+/** Settings for adjusting the SPI CLK. */
+typedef struct
+{
+    uint8_t brr;
+    uint8_t cks  : 2;
+    uint8_t bgdm : 1;
+} sci_b_spi_div_setting_t;
+
+/** Source clock selection options for SCI. */
+typedef enum e_sci_b_spi_clock_source
+{
+    SCI_B_SPI_SOURCE_CLOCK_SCISPICLK = 0,
+    SCI_B_SPI_SOURCE_CLOCK_PCLK      = 1,
+} sci_b_spi_clock_source_t;
+
+/** SCI SPI extended configuration */
+typedef struct st_sci_b_spi_extended_cfg
+{
+    sci_b_spi_div_setting_t clk_div;
+
+    /** Clock source to generate SCK can either be selected as PCLK or SCISPICLK. */
+    sci_b_spi_clock_source_t clock_source;
+} sci_b_spi_extended_cfg_t;
+
+/** SPI instance control block. DO NOT INITIALIZE. */
+typedef struct st_sci_b_spi_instance_ctrl
+{
+    uint32_t          open;
+    spi_cfg_t const * p_cfg;
+    R_SCI_B0_Type   * p_reg;
+    uint8_t         * p_src;
+    uint8_t         * p_dest;
+    uint32_t          tx_count;
+    uint32_t          rx_count;
+    uint32_t          count;
+
+    /* Pointer to callback and optional working memory */
+    void (* p_callback)(spi_callback_args_t *);
+    spi_callback_args_t * p_callback_memory;
+
+    /* Pointer to context to be passed into callback function */
+    void * p_context;
+} sci_b_spi_instance_ctrl_t;
+
+/**********************************************************************************************************************
+ * Exported global variables
+ **********************************************************************************************************************/
+
+/** @cond INC_HEADER_DEFS_SEC */
+/** Filled in Interface API structure for this Instance. */
+extern const spi_api_t g_spi_on_sci_b;
+
+/** @endcond */
+
+/**********************************************************************************************************************
+ * Public Function Prototypes
+ **********************************************************************************************************************/
+fsp_err_t R_SCI_B_SPI_Open(spi_ctrl_t * p_api_ctrl, spi_cfg_t const * const p_cfg);
+fsp_err_t R_SCI_B_SPI_Read(spi_ctrl_t * const    p_api_ctrl,
+                           void                * p_dest,
+                           uint32_t const        length,
+                           spi_bit_width_t const bit_width);
+fsp_err_t R_SCI_B_SPI_Write(spi_ctrl_t * const    p_api_ctrl,
+                            void const          * p_src,
+                            uint32_t const        length,
+                            spi_bit_width_t const bit_width);
+fsp_err_t R_SCI_B_SPI_WriteRead(spi_ctrl_t * const    p_api_ctrl,
+                                void const          * p_src,
+                                void                * p_dest,
+                                uint32_t const        length,
+                                spi_bit_width_t const bit_width);
+fsp_err_t R_SCI_B_SPI_Close(spi_ctrl_t * const p_api_ctrl);
+fsp_err_t R_SCI_B_SPI_CalculateBitrate(uint32_t                  bitrate,
+                                       sci_b_spi_clock_source_t  clock_source,
+                                       sci_b_spi_div_setting_t * sclk_div);
+fsp_err_t R_SCI_B_SPI_CallbackSet(spi_ctrl_t * const          p_api_ctrl,
+                                  void (                    * p_callback)(spi_callback_args_t *),
+                                  void * const                p_context,
+                                  spi_callback_args_t * const p_callback_memory);
+
+/* Common macro for FSP header files. There is also a corresponding FSP_HEADER macro at the top of this file. */
+FSP_FOOTER
+
+#endif
+
+/*******************************************************************************************************************//**
+ * @} (end ingroup SCI_B_SPI)
+ **********************************************************************************************************************/