soc: rockchip: vendor storage: make modules support

This submit supports to compile vendor storage into a module.

Change-Id: Id88bbee6ff44a75b2aa163a669098d410afaa921
Signed-off-by: Yifeng Zhao <zyf@rock-chips.com>

drivers/soc/rockchip/flash_vendor_storage.c

@@ -360,3 +360,4 @@ static __exit void vendor_storage_deinit(void)
 
 device_initcall_sync(vendor_storage_init);
 module_exit(vendor_storage_deinit);
+MODULE_LICENSE("GPL");

drivers/soc/rockchip/mtd_vendor_storage.c

@@ -75,6 +75,7 @@ static DEFINE_MUTEX(vendor_ops_mutex);
 static struct mtd_info *mtd;
 static const char *vendor_mtd_name = "vnvm";
 static struct mtd_nand_info nand_info;
+static struct platform_device *g_pdev;
 
 static int mtd_vendor_nand_write(void)
 {
@@ -437,6 +438,8 @@ static int __init vendor_storage_init(void)
 
 	g_idb_buffer = NULL;
 	ret = platform_driver_register(&vendor_storage_driver);
+	if (ret)
+		return ret;
 
 	pdev = platform_device_register_simple("mtd_vendor_storage",
 					       -1, NULL, 0);
@@ -444,8 +447,17 @@ static int __init vendor_storage_init(void)
 		platform_driver_unregister(&vendor_storage_driver);
 		return PTR_ERR(pdev);
 	}
+	g_pdev = pdev;
 
 	return ret;
 }
 
+static __exit void vendor_storage_deinit(void)
+{
+	platform_device_unregister(g_pdev);
+	platform_driver_unregister(&vendor_storage_driver);
+}
+
 module_init(vendor_storage_init);
+module_exit(vendor_storage_deinit);
+MODULE_LICENSE("GPL");

drivers/soc/rockchip/rk_vendor_storage.c

@@ -8,6 +8,7 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/soc/rockchip/rk_vendor_storage.h>
 
 int (*_vendor_read)(u32 id, void *pbuf, u32 size) = NULL;
@@ -47,3 +48,5 @@ bool is_rk_vendor_ready(void)
 	return false;
 }
 EXPORT_SYMBOL(is_rk_vendor_ready);
+
+MODULE_LICENSE("GPL");

include/linux/soc/rockchip/rk_vendor_storage.h

@@ -28,9 +28,31 @@
 #define LAN_RGMII_DL_ID			16
 #define EINK_VCOM_ID			17
 
+#if IS_ENABLED(CONFIG_ROCKCHIP_VENDOR_STORAGE)
 int rk_vendor_read(u32 id, void *pbuf, u32 size);
 int rk_vendor_write(u32 id, void *pbuf, u32 size);
 int rk_vendor_register(void *read, void *write);
 bool is_rk_vendor_ready(void);
+#else
+static inline int rk_vendor_read(u32 id, void *pbuf, u32 size)
+{
+	return -1;
+}
+
+static inline int rk_vendor_write(u32 id, void *pbuf, u32 size)
+{
+	return -1;
+}
+
+static inline int rk_vendor_register(void *read, void *write)
+{
+	return -1;
+}
+
+static inline bool is_rk_vendor_ready(void)
+{
+	return false;
+}
+#endif
 
 #endif