libfdt: replace ARCH_FIXUP_FDT with ARCH_FIXUP_FDT_MEMORY

Commit e2f88dfd2d96 ("libfdt: Introduce new ARCH_FIXUP_FDT option")
allows us to skip memory setup of DTB, but a problem for ARM is that
spin_table_update_dt() and psci_update_dt() are skipped as well if
CONFIG_ARCH_FIXUP_FDT is disabled.

This commit allows us to skip only fdt_fixup_memory_banks() instead
of the whole of arch_fixup_fdt().  It will be useful when we want to
use a memory node from a kernel DTB as is, but need some fixups for
Spin-Table/PSCI.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Alexey Brodkin <abrodkin@synopsys.com>
Acked-by: Simon Glass <sjg@chromium.org>
Fixed build error for x86:
Signed-off-by: Simon Glass <sjg@chromium.org>

Kconfig

@@ -298,9 +298,8 @@ config SYS_CLK_FREQ
 	help
 	  TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
 
-config ARCH_FIXUP_FDT
-	bool "Enable arch_fixup_fdt() call"
-	depends on ARM || MIPS
+config ARCH_FIXUP_FDT_MEMORY
+	bool "Enable arch_fixup_memory_banks() call"
 	default y
 	help
 	  Enable FDT memory map syncup before OS boot. This feature can be

arch/arc/lib/bootm.c

@@ -37,6 +37,11 @@ void arch_lmb_reserve(struct lmb *lmb)
 	lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp));
 }
 
+int arch_fixup_fdt(void *blob)
+{
+	return 0;
+}
+
 static int cleanup_before_linux(void)
 {
 	disable_interrupts();

arch/arm/lib/bootm-fdt.c

@@ -25,7 +25,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-#ifdef CONFIG_ARCH_FIXUP_FDT
 int arch_fixup_fdt(void *blob)
 {
 	bd_t *bd = gd->bd;
@@ -61,4 +60,3 @@ int arch_fixup_fdt(void *blob)
 
 	return 0;
 }
-#endif

arch/arm/lib/bootm.c

@@ -414,10 +414,8 @@ void boot_prep_vxworks(bootm_headers_t *images)
 	if (images->ft_addr) {
 		off = fdt_path_offset(images->ft_addr, "/memory");
 		if (off < 0) {
-#ifdef CONFIG_ARCH_FIXUP_FDT
 			if (arch_fixup_fdt(images->ft_addr))
 				puts("## WARNING: fixup memory failed!\n");
-#endif
 		}
 	}
 #endif

arch/microblaze/lib/bootm.c

@@ -17,6 +17,11 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+int arch_fixup_fdt(void *blob)
+{
+	return 0;
+}
+
 int do_bootm_linux(int flag, int argc, char * const argv[],
 		   bootm_headers_t *images)
 {

arch/mips/lib/bootm.c

@@ -253,7 +253,6 @@ static int boot_reloc_fdt(bootm_headers_t *images)
 #endif
 }
 
-#ifdef CONFIG_ARCH_FIXUP_FDT
 int arch_fixup_fdt(void *blob)
 {
 #if CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && CONFIG_IS_ENABLED(OF_LIBFDT)
@@ -265,7 +264,6 @@ int arch_fixup_fdt(void *blob)
 	return 0;
 #endif
 }
-#endif
 
 static int boot_setup_fdt(bootm_headers_t *images)
 {

arch/powerpc/lib/bootm.c

@@ -38,6 +38,11 @@ static void set_clocks_in_mhz (bd_t *kbd);
 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE	(768*1024*1024)
 #endif
 
+int arch_fixup_fdt(void *blob)
+{
+	return 0;
+}
+
 static void boot_jump_linux(bootm_headers_t *images)
 {
 	void	(*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,

arch/sandbox/lib/bootm.c

@@ -50,6 +50,11 @@ int bootz_setup(ulong image, ulong *start, ulong *end)
 	return ret;
 }
 
+int arch_fixup_fdt(void *blob)
+{
+	return 0;
+}
+
 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
 {
 	if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {

arch/x86/lib/bootm.c

@@ -26,6 +26,11 @@ DECLARE_GLOBAL_DATA_PTR;
 
 #define COMMAND_LINE_OFFSET 0x9000
 
+int arch_fixup_fdt(void *blob)
+{
+	return 0;
+}
+
 __weak void board_quiesce_devices(void)
 {
 }

common/fdt_support.c

@@ -381,6 +381,7 @@ void do_fixup_by_compat_u32(void *fdt, const char *compat,
 	do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
 }
 
+#ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
 /*
  * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
  */
@@ -459,6 +460,7 @@ int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
 	}
 	return 0;
 }
+#endif
 
 int fdt_fixup_memory(void *blob, u64 start, u64 size)
 {

common/image-fdt.c

@@ -474,12 +474,10 @@ int image_setup_libfdt(bootm_headers_t *images, void *blob,
 		printf("ERROR: /chosen node create failed\n");
 		goto err;
 	}
-#ifdef CONFIG_ARCH_FIXUP_FDT
 	if (arch_fixup_fdt(blob) < 0) {
 		printf("ERROR: arch-specific fdt fixup failed\n");
 		goto err;
 	}
-#endif
 	if (IMAGE_OF_BOARD_SETUP) {
 		fdt_ret = ft_board_setup(blob, gd->bd);
 		if (fdt_ret) {

include/fdt_support.h

@@ -93,7 +93,15 @@ int fdt_fixup_memory(void *blob, u64 start, u64 size);
  *			property will be left untouched.
  * @return 0 if ok, or -1 or -FDT_ERR_... on error
  */
+#ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks);
+#else
+static inline int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[],
+					 int banks)
+{
+	return 0;
+}
+#endif
 
 void fdt_fixup_ethernet(void *fdt);
 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,