squash spiffs: use mtd user api instead of function pointers

Author: Vincent Dupont

Makefile.dep

@@ -581,4 +581,5 @@ ifneq (,$(filter spiffs,$(USEMODULE)))
     USEPKG += spiffs
     USEMODULE += vfs
     USEMODULE += spiffs_fs
+    USEMODULE += mtd
 endif

pkg/spiffs/fs/spiffs_fs.c

@@ -26,7 +26,7 @@ static int32_t _dev_read(struct spiffs_t *fs, u32_t addr, u32_t size, u8_t *dst)
 
     //DEBUG("spiffs: read: from addr 0x%" PRIx32 " size 0x%" PRIx32 "\n", addr, size);
 
-    return dev->driver->read(dev, dst, addr, size);
+    return mtd_read(dev, dst, addr, size);
 }
 
 static int32_t _dev_write(struct spiffs_t *fs, u32_t addr, u32_t size, u8_t *src)
@@ -35,7 +35,7 @@ static int32_t _dev_write(struct spiffs_t *fs, u32_t addr, u32_t size, u8_t *src
 
     DEBUG("spiffs: write: from addr 0x%" PRIx32 " size 0x%" PRIx32 "\n", addr, size);
 
-    return dev->driver->write(dev, src, addr, size);
+    return mtd_write(dev, src, addr, size);
 }
 
 static int32_t _dev_erase(struct spiffs_t *fs, u32_t addr, u32_t size)
@@ -44,7 +44,7 @@ static int32_t _dev_erase(struct spiffs_t *fs, u32_t addr, u32_t size)
 
     DEBUG("spiffs: erase: from addr 0x%" PRIx32" size 0x%" PRIx32 "\n", addr, size);
 
-    return dev->driver->erase(dev, addr, size);
+    return mtd_erase(dev, addr, size);
 }
 #else
 #error "SPIFFS needs SPIFFS_HAL_CALLBACK_EXTRA"
@@ -82,9 +82,7 @@ static int _mount(vfs_mount_t *mountp)
     fs_desc->config.phys_addr = 0;
     fs_desc->config.phys_erase_block = dev->page_size * dev->pages_per_sector;
 
-    if (dev->driver->init) {
-        dev->driver->init(dev);
-    }
+    mtd_init(dev);
 
     s32_t ret = SPIFFS_mount(&fs_desc->fs,
                                &fs_desc->config,