[spi]添加rt_spi_bus_attach_device_cspin 函数 (#6916)

这个函数实现了原先的挂载功能，并且调用pin框架，初始化cs引脚，是一个功能相对完善的挂载函数。用户也能更简单的使用。
该函数取代rt_spi_bus_attach_device，后续rt_spi_bus_attach_device会被逐渐淘汰掉。新的BSP以及软件包应当使用rt_spi_bus_attach_device_cspin新函数。

STM32L475潘多拉测试通过。

2 files changed, 28 insertions, 6 deletions

diff --git a/components/drivers/include/drivers/spi.h b/components/drivers/include/drivers/spi.h
index cd5ebe2db6..7e3842d76e 100644
--- a/components/drivers/include/drivers/spi.h
+++ b/components/drivers/include/drivers/spi.h
@@ -177,6 +177,13 @@ rt_err_t rt_spi_bus_attach_device(struct rt_spi_device *device,
                                   const char           *bus_name,
                                   void                 *user_data);
 
+/* attach a device on SPI bus with CS pin */
+rt_err_t rt_spi_bus_attach_device_cspin(struct rt_spi_device *device,
+                                        const char           *name,
+                                        const char           *bus_name,
+                                        rt_base_t            cs_pin,
+                                        void                 *user_data);
+
 /**
  * This function takes SPI bus.
  *
diff --git a/components/drivers/spi/spi_core.c b/components/drivers/spi/spi_core.c
index 6bc875fccd..dd805337f5 100644
--- a/components/drivers/spi/spi_core.c
+++ b/components/drivers/spi/spi_core.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2021, RT-Thread Development Team
+ * Copyright (c) 2006-2023, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -40,10 +40,11 @@ rt_err_t rt_spi_bus_register(struct rt_spi_bus       *bus,
     return RT_EOK;
 }
 
-rt_err_t rt_spi_bus_attach_device(struct rt_spi_device *device,
-                                  const char           *name,
-                                  const char           *bus_name,
-                                  void                 *user_data)
+rt_err_t rt_spi_bus_attach_device_cspin(struct rt_spi_device *device,
+                                        const char           *name,
+                                        const char           *bus_name,
+                                        rt_base_t            cs_pin,
+                                        void                 *user_data)
 {
     rt_err_t result;
     rt_device_t bus;
@@ -59,9 +60,15 @@ rt_err_t rt_spi_bus_attach_device(struct rt_spi_device *device,
         if (result != RT_EOK)
             return result;
 
+        if(cs_pin != PIN_NONE)
+        {
+            rt_pin_mode(cs_pin, PIN_MODE_OUTPUT);
+            rt_pin_write(cs_pin, PIN_HIGH);
+        }
+
         rt_memset(&device->config, 0, sizeof(device->config));
         device->parent.user_data = user_data;
-
+        device->cs_pin = cs_pin;
         return RT_EOK;
     }
 
@@ -69,6 +76,14 @@ rt_err_t rt_spi_bus_attach_device(struct rt_spi_device *device,
     return -RT_ERROR;
 }
 
+rt_err_t rt_spi_bus_attach_device(struct rt_spi_device *device,
+                                  const char           *name,
+                                  const char           *bus_name,
+                                  void                 *user_data)
+{
+    return rt_spi_bus_attach_device_cspin(device, name, bus_name, PIN_NONE, user_data);
+}
+
 rt_err_t rt_spi_configure(struct rt_spi_device        *device,
                           struct rt_spi_configuration *cfg)
 {