[PATCH 20/32] kconfig: Refactor code into separate writer functions

[Simon Glass <sjg@chromium.org>]

Separate out the code that writes the Makefile and headers so we can
reuse these functions when writing out SPL files.

This makes no functional change.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

 scripts/kconfig/confdata.c | 65 ++++++++++++++++++++++----------------
 scripts/kconfig/expr.h     |  9 ++++++
 scripts/kconfig/lkc.h      |  9 ++++++
 3 files changed, 56 insertions(+), 27 deletions(-)

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index d587b10d7f8..73bf43bcb95 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -509,27 +509,18 @@ int conf_read(const char *name)
 	return 0;
 }
 
-/*
- * Kconfig configuration printer
- *
- * This printer is used when generating the resulting configuration after
- * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
- * passing a non-NULL argument to the printer.
- *
- */
-static void
-kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
+/* Print a symbol for a Makefile */
+static void print_makefile_sym(FILE *fp, const char *name,
+			       enum symbol_type type, const char *value,
+			       bool skip_unset)
 {
-
-	switch (sym->type) {
+	switch (type) {
 	case S_BOOLEAN:
 	case S_TRISTATE:
 		if (*value == 'n') {
-			bool skip_unset = (arg != NULL);
-
 			if (!skip_unset)
 				fprintf(fp, "# %s%s is not set\n",
-				    CONFIG_, sym->name);
+					CONFIG_, name);
 			return;
 		}
 		break;
@@ -537,7 +528,21 @@ kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 		break;
 	}
 
-	fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
+	fprintf(fp, "%s%s=%s\n", CONFIG_, name, value);
+}
+
+/*
+ * Kconfig configuration printer
+ *
+ * This printer is used when generating the resulting configuration after
+ * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
+ * passing a non-NULL argument to the printer.
+ *
+ */
+static void
+kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
+{
+	print_makefile_sym(fp, sym->name, sym->type, value, arg != NULL);
 }
 
 static void
@@ -566,16 +571,12 @@ static struct conf_printer kconfig_printer_cb =
 	.print_comment = kconfig_print_comment,
 };
 
-/*
- * Header printer
- *
- * This printer is used when generating the `include/generated/autoconf.h' file.
- */
-static void
-header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
+/* Print a symbol for a header file */
+static void print_header_sym(FILE *fp, const char *name, enum symbol_type type,
+			     const char *value)
 {
 
-	switch (sym->type) {
+	switch (type) {
 	case S_BOOLEAN:
 	case S_TRISTATE: {
 		const char *suffix = "";
@@ -588,7 +589,7 @@ header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 			/* fall through */
 		default:
 			fprintf(fp, "#define %s%s%s 1\n",
-			    CONFIG_, sym->name, suffix);
+			    CONFIG_, name, suffix);
 		}
 		break;
 	}
@@ -598,18 +599,28 @@ header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 		if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
 			prefix = "0x";
 		fprintf(fp, "#define %s%s %s%s\n",
-		    CONFIG_, sym->name, prefix, value);
+		    CONFIG_, name, prefix, value);
 		break;
 	}
 	case S_STRING:
 	case S_INT:
 		fprintf(fp, "#define %s%s %s\n",
-		    CONFIG_, sym->name, value);
+		    CONFIG_, name, value);
 		break;
 	default:
 		break;
 	}
+}
 
+/*
+ * Header printer
+ *
+ * This printer is used when generating the `include/generated/autoconf.h' file.
+ */
+static void
+header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
+{
+	print_header_sym(fp, sym->name, sym->type, value);
 }
 
 static void
diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h
index 7c329e17900..656c87fb4f3 100644
--- a/scripts/kconfig/expr.h
+++ b/scripts/kconfig/expr.h
@@ -158,6 +158,15 @@ struct symbol {
 /* Set symbol to y if allnoconfig; used for symbols that hide others */
 #define SYMBOL_ALLNOCONFIG_Y 0x200000
 
+/* U-Boot: Marks an SPL symbol */
+#define SYMBOL_SPL		0x400000
+
+/* U-Boot: Marks a non-SPL symbol that also has an SPL version */
+#define SYMBOL_HAS_SPL		0x800000
+
+/* U-Boot: Marks an-SPL symbol that does not have a non-SPL version */
+#define SYMBOL_SPL_ONLY		0x1000000
+
 #define SYMBOL_MAXLENGTH	256
 #define SYMBOL_HASHSIZE		9973
 
diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index 9eb7c837cd8..dec03cc927a 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -71,6 +71,15 @@ void sym_add_change_count(int count);
 bool conf_set_all_new_symbols(enum conf_def_mode mode);
 void set_all_choice_values(struct symbol *csym);
 
+/**
+ * conf_mark_spl_symbols() - Mark SPL symbols
+ *
+ * Symbols which don't start with SPL_ (TPL_, etc.) but have an SPL version
+ * should be marked with the SYMBOL_SPL flag, so we know to avoid writing them
+ * in the SPL autoconf.h files.
+ */
+void conf_mark_spl_symbols(void);
+
 /* confdata.c and expr.c */
 static inline void xfwrite(const void *str, size_t len, size_t count, FILE *out)
 {
-- 
2.39.1.456.gfc5497dd1b-goog