[U-Boot] [PATCH v2 2/2] dtb_platdata.py: prevent define generation of alias

[Heiko Schocher <hs@denx.de>]

generate define for an alias only if the struct is not
created already.

This prevents compilerwarning:
  PLAT    spl/dts/dt-platdata.o
spl/dts/dt-platdata.c:11:46: error: missing braces around initializer [-Werror=missing-braces]
 static const struct dtd_simple_bus dtv_ahb = {
                                              ^
spl/dts/dt-platdata.c:20:46: error: missing braces around initializer [-Werror=missing-braces]
 static const struct dtd_simple_bus dtv_apb = {
                                              ^
cc1: all warnings being treated as errors

on the at91 based taurus board. Reason is in at91sam9260.dtsi
is defined:

ahb {
        compatible = "simple-bus";
        ranges;

and later:

pinctrl: pinctrl at fffff400 {
        compatible = "atmel,at91rm9200-pinctrl", "simple-bus";
        ranges = <0xfffff400 0xfffff400 0x600>;

without this patch dtoc generates:

struct dtd_atmel_at91rm9200_pinctrl {
	fdt32_t		atmel_mux_mask[6];
	fdt32_t		ranges[3];
	fdt32_t		reg[6];
};

struct dtd_simple_bus {
        bool            ranges;
};

"#define dtd_simple_bus dtd_atmel_at91rm9200_pinctrl"

and the line with "define dtd_simple_bus..." introduces
the warning. This define is not needed.

Signed-off-by: Heiko Schocher <hs@denx.de>

---
added Simon Glass to cc, as I am unsure if this is a correct
fix. Travis build is fine, so I think, it breaks no boards.

Changes in v2:
- new in v2 as Eugen Hristev used -Werror and
  build failed.

 tools/dtoc/dtb_platdata.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/dtoc/dtb_platdata.py b/tools/dtoc/dtb_platdata.py
index ca580b45d4..17a3dccb11 100644
--- a/tools/dtoc/dtb_platdata.py
+++ b/tools/dtoc/dtb_platdata.py
@@ -450,8 +450,9 @@ class DtbPlatdata(object):
             self.out('};\n')
 
         for alias, struct_name in self._aliases.iteritems():
-            self.out('#define %s%s %s%s\n'% (STRUCT_PREFIX, alias,
-                                             STRUCT_PREFIX, struct_name))
+            if alias not in sorted(structs):
+                self.out('#define %s%s %s%s\n'% (STRUCT_PREFIX, alias,
+                                                 STRUCT_PREFIX, struct_name))
 
     def output_node(self, node):
         """Output the C code for a node
-- 
2.17.2