dtoc: Avoid very long lines in output

Large arrays can result in lines with hundreds or thousands of characters
which is not very editor-friendly. To avoid this, addjust the tool to
group values 8 per line.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Kever Yang <kever.yang@rock-chips.com>

tools/dtoc/dtb_platdata.py

@@ -385,7 +385,12 @@ class DtbPlatdata(object):
                 else:
                     for val in prop.value:
                         vals.append(get_value(prop.type, val))
-                self.buf(', '.join(vals))
+
+                # Put 8 values per line to avoid very long lines.
+                for i in xrange(0, len(vals), 8):
+                    if i:
+                        self.buf(',\n\t\t')
+                    self.buf(', '.join(vals[i:i + 8]))
                 self.buf('}')
             else:
                 self.buf(get_value(prop.type, prop.value))

tools/dtoc/test_dtoc.py

@@ -146,7 +146,8 @@ static struct dtd_sandbox_spl_test dtv_spl_test = {
 \t.bytearray\t\t= {0x6, 0x0, 0x0},
 \t.byteval\t\t= 0x5,
 \t.intval\t\t\t= 0x1,
-\t.longbytearray\t\t= {0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf, 0x10, 0x11},
+\t.longbytearray\t\t= {0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf, 0x10,
+\t\t0x11},
 \t.stringval\t\t= "message",
 \t.boolval\t\t= true,
 \t.intarray\t\t= {0x2, 0x3, 0x4, 0x0},
@@ -162,7 +163,8 @@ static struct dtd_sandbox_spl_test dtv_spl_test2 = {
 \t.bytearray\t\t= {0x1, 0x23, 0x34},
 \t.byteval\t\t= 0x8,
 \t.intval\t\t\t= 0x3,
-\t.longbytearray\t\t= {0x9, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
+\t.longbytearray\t\t= {0x9, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+\t\t0x0},
 \t.stringval\t\t= "message2",
 \t.intarray\t\t= {0x5, 0x0, 0x0, 0x0},
 \t.stringarray\t\t= {"another", "multi-word", "message"},