This function is essentially independent from tffp, and will also be
utilised in implementing UEFI capsule update in a later commit.
So just give it a more generic name.
In addition, a new configuration option, CONFIG_DFU_ALT, was introduced
so that the file will be compiled with different options, particularly
one added in a later commit.

Signed-off-by: AKASHI Takahiro <takahiro.aka...@linaro.org>
---
 drivers/dfu/Kconfig                   |  5 +++++
 drivers/dfu/Makefile                  |  2 +-
 drivers/dfu/{dfu_tftp.c => dfu_alt.c} | 17 ++++++++++++--
 include/dfu.h                         | 32 +++++++++++++--------------
 4 files changed, 37 insertions(+), 19 deletions(-)
 rename drivers/dfu/{dfu_tftp.c => dfu_alt.c} (67%)

diff --git a/drivers/dfu/Kconfig b/drivers/dfu/Kconfig
index cafb6a34090e..1bddaef45532 100644
--- a/drivers/dfu/Kconfig
+++ b/drivers/dfu/Kconfig
@@ -15,8 +15,13 @@ config DFU_OVER_TFTP
        select UPDATE_TFTP
 
 if DFU
+config DFU_ALT
+       bool
+       default n
+
 config DFU_TFTP
        bool "DFU via TFTP"
+       select DFU_ALT
        select DFU_OVER_TFTP
        help
          This option allows performing update of DFU-managed medium with data
diff --git a/drivers/dfu/Makefile b/drivers/dfu/Makefile
index 0d7925c083ef..cc7de1d3ed9b 100644
--- a/drivers/dfu/Makefile
+++ b/drivers/dfu/Makefile
@@ -9,5 +9,5 @@ obj-$(CONFIG_$(SPL_)DFU_MTD) += dfu_mtd.o
 obj-$(CONFIG_$(SPL_)DFU_NAND) += dfu_nand.o
 obj-$(CONFIG_$(SPL_)DFU_RAM) += dfu_ram.o
 obj-$(CONFIG_$(SPL_)DFU_SF) += dfu_sf.o
-obj-$(CONFIG_$(SPL_)DFU_TFTP) += dfu_tftp.o
+obj-$(CONFIG_$(SPL_)DFU_ALT) += dfu_alt.o
 obj-$(CONFIG_$(SPL_)DFU_VIRT) += dfu_virt.o
diff --git a/drivers/dfu/dfu_tftp.c b/drivers/dfu/dfu_alt.c
similarity index 67%
rename from drivers/dfu/dfu_tftp.c
rename to drivers/dfu/dfu_alt.c
index ffae4bb54f80..5b1b13d7170d 100644
--- a/drivers/dfu/dfu_tftp.c
+++ b/drivers/dfu/dfu_alt.c
@@ -10,8 +10,21 @@
 #include <errno.h>
 #include <dfu.h>
 
-int dfu_tftp_write(char *dfu_entity_name, unsigned int addr, unsigned int len,
-                  char *interface, char *devstring)
+/**
+ * dfu_write_by_name() - write data to DFU medium
+ * @dfu_entity_name:    Name of DFU entity to write
+ * @addr:               Address of data buffer to write
+ * @len:                Number of bytes
+ * @interface:          Destination DFU medium (e.g. "mmc")
+ * @devstring:          Instance number of destination DFU medium (e.g. "1")
+ *
+ * This function is storing data received on DFU supported medium which
+ * is specified by @dfu_entity_name.
+ *
+ * Return:              0 - on success, error code - otherwise
+ */
+int dfu_write_by_name(char *dfu_entity_name, unsigned int addr,
+                     unsigned int len, char *interface, char *devstring)
 {
        char *s, *sb;
        int alt_setting_num, ret;
diff --git a/include/dfu.h b/include/dfu.h
index 6fa450593605..94b0a9e68317 100644
--- a/include/dfu.h
+++ b/include/dfu.h
@@ -494,27 +494,27 @@ static inline int dfu_fill_entity_virt(struct dfu_entity 
*dfu, char *devstr,
 #endif
 
 /**
- * dfu_tftp_write() - write TFTP data to DFU medium
+ * dfu_write_by_name() - write data to DFU medium
+ * @dfu_entity_name:   Name of DFU entity to write
+ * @addr:              Address of data buffer to write
+ * @len:               Number of bytes
+ * @interface:         Destination DFU medium (e.g. "mmc")
+ * @devstring:         Instance number of destination DFU medium (e.g. "1")
  *
- * This function is storing data received via TFTP on DFU supported medium.
+ * This function is storing data received on DFU supported medium which
+ * is specified by @dfu_entity_name.
  *
- * @dfu_entity_name:   name of DFU entity to write
- * @addr:              address of data buffer to write
- * @len:               number of bytes
- * @interface:         destination DFU medium (e.g. "mmc")
- * @devstring:         instance number of destination DFU medium (e.g. "1")
- *
- * Return:             0 on success, otherwise error code
+ * Return:             0 - on success, error code - otherwise
  */
-#if CONFIG_IS_ENABLED(DFU_TFTP)
-int dfu_tftp_write(char *dfu_entity_name, unsigned int addr, unsigned int len,
-                  char *interface, char *devstring);
+#if CONFIG_IS_ENABLED(DFU_ALT)
+int dfu_write_by_name(char *dfu_entity_name, unsigned int addr,
+                     unsigned int len, char *interface, char *devstring);
 #else
-static inline int dfu_tftp_write(char *dfu_entity_name, unsigned int addr,
-                                unsigned int len, char *interface,
-                                char *devstring)
+static inline int dfu_write_by_name(char *dfu_entity_name, unsigned int addr,
+                                   unsigned int len, char *interface,
+                                   char *devstring)
 {
-       puts("TFTP write support for DFU not available!\n");
+       puts("write support for DFU not available!\n");
        return -ENOSYS;
 }
 #endif
-- 
2.27.0

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