[U-Boot] [PATCH v2] zynq: treat ps7_init.c/h as external files to ignore them

[Masahiro Yamada]

ps7_init.c and ps7_init.h are supposed to be exported by hw project
and copied to board/xilinx/zynq/ directory.

We want them to be ignored by git.
So what we should do is to always treat them as external files
rather than replacing ps7_init.c

This commit does:

 - Move a weak function ps7_init() to arch/arm/cpu/armv7/zynq/spl.c
   and delete board/xilinx/zynq/ps7_init.c

 - Compile board/xilinx/zynq/ps7_init.c only when it exists

 - Add .gitignore to ignore ps7_init.c/h

Signed-off-by: Masahiro Yamada <yamada.m at jp.panasonic.com>
Signed-off-by: Michal Simek <michal.simek at xilinx.com>
---

Changes in v2:
  (only cosmetic changes in v2)
  - Improve the comment in arch/arm/cpu/armv7/zynq/spl.c
          s/replaced/overridden/
  - Add Signed-off-by credit of Michal Simek

 arch/arm/cpu/armv7/zynq/spl.c |  8 ++++++++
 board/xilinx/zynq/.gitignore  |  1 +
 board/xilinx/zynq/Makefile    |  5 ++++-
 board/xilinx/zynq/ps7_init.c  | 12 ------------
 4 files changed, 13 insertions(+), 13 deletions(-)
 create mode 100644 board/xilinx/zynq/.gitignore
 delete mode 100644 board/xilinx/zynq/ps7_init.c

diff --git a/arch/arm/cpu/armv7/zynq/spl.c b/arch/arm/cpu/armv7/zynq/spl.c
index fcad762..60da4d1 100644
--- a/arch/arm/cpu/armv7/zynq/spl.c
+++ b/arch/arm/cpu/armv7/zynq/spl.c
@@ -67,3 +67,11 @@ int spl_start_uboot(void)
 	return 0;
 }
 #endif
+
+__weak void ps7_init(void)
+{
+	/*
+	 * This function is overridden by the one in
+	 * board/xilinx/zynq/ps7_init.c, if it exists.
+	 */
+}
diff --git a/board/xilinx/zynq/.gitignore b/board/xilinx/zynq/.gitignore
new file mode 100644
index 0000000..68b8edd
--- /dev/null
+++ b/board/xilinx/zynq/.gitignore
@@ -0,0 +1 @@
+ps7_init.[ch]
diff --git a/board/xilinx/zynq/Makefile b/board/xilinx/zynq/Makefile
index 3f19a1c..fd93f63 100644
--- a/board/xilinx/zynq/Makefile
+++ b/board/xilinx/zynq/Makefile
@@ -6,4 +6,7 @@
 #
 
 obj-y	:= board.o
-obj-$(CONFIG_SPL_BUILD)	+= ps7_init.o
+
+# Please copy ps7_init.c/h from hw project to this directory
+obj-$(CONFIG_SPL_BUILD) += \
+		$(if $(wildcard $(srctree)/$(src)/ps7_init.c), ps7_init.o)
diff --git a/board/xilinx/zynq/ps7_init.c b/board/xilinx/zynq/ps7_init.c
deleted file mode 100644
index c47da09..0000000
--- a/board/xilinx/zynq/ps7_init.c
+++ /dev/null
@@ -1,12 +0,0 @@
-/*
- * (C) Copyright 2014 Xilinx, Inc. Michal Simek
- *
- * SPDX-License-Identifier:    GPL-2.0+
- */
-#include <common.h>
-#include <asm/arch/spl.h>
-
-__weak void ps7_init(void)
-{
-	puts("Please copy ps7_init.c/h from hw project\n");
-}
-- 
1.8.3.2