of/fdt: update of_get_flat_dt_prop in prep for libfdt

Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop
call in preparation to convert FDT code to use libfdt. Make the return
value const and the property length ptr type an int.

Signed-off-by: Rob Herring <robh@kernel.org>
Tested-by: Michal Simek <michal.simek@xilinx.com>
Tested-by: Grant Likely <grant.likely@linaro.org>
Tested-by: Stephen Chivers <schivers@csc.com>
(cherry picked from commit 9d0c4dfedd96ee54fc075b16d02f82499c8cc3a6)
Signed-off-by: Mark Brown <broonie@linaro.org>

Conflicts:
	arch/arc/kernel/devtree.c
	arch/arm/kernel/devtree.c
	arch/arm/mach-exynos/exynos.c
	arch/arm/plat-samsung/s5p-dev-mfc.c
	arch/powerpc/kernel/epapr_paravirt.c
	arch/powerpc/kernel/prom.c
	arch/powerpc/mm/hash_utils_64.c
	arch/powerpc/platforms/powernv/opal.c
	arch/xtensa/kernel/setup.c
	drivers/of/fdt.c

17 files changed, 110 insertions, 71 deletions

diff --git a/arch/arc/kernel/devtree.c b/arch/arc/kernel/devtree.c
index bdee3a812052..afdd13cf881c 100644
--- a/arch/arc/kernel/devtree.c
+++ b/arch/arc/kernel/devtree.c
@@ -40,7 +40,7 @@ struct machine_desc * __init setup_machine_fdt(void *dt)
 	const char *model, *compat;
 	void *clk;
 	char manufacturer[16];
-	unsigned long len;
+	int len;
 
 	/* check device tree validity */
 	if (be32_to_cpu(devtree->magic) != OF_DT_HEADER)
diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
index 5859c8bc727c..a44e7d11ab02 100644
--- a/arch/arm/kernel/devtree.c
+++ b/arch/arm/kernel/devtree.c
@@ -212,7 +212,7 @@ struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys)
 	}
 	if (!mdesc_best) {
 		const char *prop;
-		long size;
+		int size;
 
 		early_print("\nError: unrecognized/unsupported "
 			    "device tree compatible list:\n[ ");
diff --git a/arch/arm/mach-vexpress/platsmp.c b/arch/arm/mach-vexpress/platsmp.c
index dc1ace55d557..84bd6fde7a7c 100644
--- a/arch/arm/mach-vexpress/platsmp.c
+++ b/arch/arm/mach-vexpress/platsmp.c
@@ -51,7 +51,7 @@ static int __init vexpress_dt_find_scu(unsigned long node,
 {
 	if (of_flat_dt_match(node, vexpress_dt_cortex_a9_match)) {
 		phys_addr_t phys_addr;
-		__be32 *reg = of_get_flat_dt_prop(node, "reg", NULL);
+		const __be32 *reg = of_get_flat_dt_prop(node, "reg", NULL);
 
 		if (WARN_ON(!reg))
 			return -EINVAL;
diff --git a/arch/arm/plat-samsung/s5p-dev-mfc.c b/arch/arm/plat-samsung/s5p-dev-mfc.c
index a93fb6fb6606..586ca73d1059 100644
--- a/arch/arm/plat-samsung/s5p-dev-mfc.c
+++ b/arch/arm/plat-samsung/s5p-dev-mfc.c
@@ -116,8 +116,8 @@ device_initcall(s5p_mfc_memory_init);
 int __init s5p_fdt_find_mfc_mem(unsigned long node, const char *uname,
 				int depth, void *data)
 {
-	__be32 *prop;
-	unsigned long len;
+	const __be32 *prop;
+	int len;
 	struct s5p_mfc_dt_meminfo *mfc_mem = data;
 
 	if (!data)
diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c
index 62e2e8f2c5d6..c9c766fe6321 100644
--- a/arch/microblaze/kernel/prom.c
+++ b/arch/microblaze/kernel/prom.c
@@ -52,13 +52,13 @@ void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
 }
 
 #ifdef CONFIG_EARLY_PRINTK
-static char *stdout;
+static const char *stdout;
 
 static int __init early_init_dt_scan_chosen_serial(unsigned long node,
 				const char *uname, int depth, void *data)
 {
-	unsigned long l;
-	char *p;
+	int l;
+	const char *p;
 
 	pr_debug("%s: depth: %d, uname: %s\n", __func__, depth, uname);
 
@@ -89,7 +89,7 @@ static int __init early_init_dt_scan_chosen_serial(unsigned long node,
 				(strncmp(p, "xlnx,opb-uartlite", 17) == 0) ||
 				(strncmp(p, "xlnx,axi-uartlite", 17) == 0) ||
 				(strncmp(p, "xlnx,mdm", 8) == 0)) {
-			unsigned int *addrp;
+			const unsigned int *addrp;
 
 			*(u32 *)data = UARTLITE;
 
diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index 2230fd0ca3e4..7213d930918d 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -55,9 +55,9 @@ int crash_mem_ranges;
 int __init early_init_dt_scan_fw_dump(unsigned long node,
 			const char *uname, int depth, void *data)
 {
-	__be32 *sections;
+	const __be32 *sections;
 	int i, num_sections;
-	unsigned long size;
+	int size;
 	const int *token;
 
 	if (depth != 1 || strcmp(uname, "rtas") != 0)
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 2f3e25225158..2a954ab60839 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -162,7 +162,7 @@ static struct ibm_pa_feature {
 	{CPU_FTR_REAL_LE, PPC_FEATURE_TRUE_LE, 5, 0, 0},
 };
 
-static void __init scan_features(unsigned long node, unsigned char *ftrs,
+static void __init scan_features(unsigned long node, const unsigned char *ftrs,
 				 unsigned long tablelen,
 				 struct ibm_pa_feature *fp,
 				 unsigned long ft_size)
@@ -201,8 +201,8 @@ static void __init scan_features(unsigned long node, unsigned char *ftrs,
 
 static void __init check_cpu_pa_features(unsigned long node)
 {
-	unsigned char *pa_ftrs;
-	unsigned long tablelen;
+	const unsigned char *pa_ftrs;
+	int tablelen;
 
 	pa_ftrs = of_get_flat_dt_prop(node, "ibm,pa-features", &tablelen);
 	if (pa_ftrs == NULL)
@@ -215,7 +215,7 @@ static void __init check_cpu_pa_features(unsigned long node)
 #ifdef CONFIG_PPC_STD_MMU_64
 static void __init check_cpu_slb_size(unsigned long node)
 {
-	u32 *slb_size_ptr;
+	const __be32 *slb_size_ptr;
 
 	slb_size_ptr = of_get_flat_dt_prop(node, "slb-size", NULL);
 	if (slb_size_ptr != NULL) {
@@ -256,7 +256,7 @@ static struct feature_property {
 static inline void identical_pvr_fixup(unsigned long node)
 {
 	unsigned int pvr;
-	char *model = of_get_flat_dt_prop(node, "model", NULL);
+	const char *model = of_get_flat_dt_prop(node, "model", NULL);
 
 	/*
 	 * Since 440GR(x)/440EP(x) processors have the same pvr,
@@ -294,11 +294,11 @@ static int __init early_init_dt_scan_cpus(unsigned long node,
 					  const char *uname, int depth,
 					  void *data)
 {
-	char *type = of_get_flat_dt_prop(node, "device_type", NULL);
-	const u32 *prop;
-	const u32 *intserv;
+	const char *type = of_get_flat_dt_prop(node, "device_type", NULL);
+	const __be32 *prop;
+	const __be32 *intserv;
 	int i, nthreads;
-	unsigned long len;
+	int len;
 	int found = -1;
 	int found_thread = 0;
 
@@ -389,7 +389,7 @@ static int __init early_init_dt_scan_cpus(unsigned long node,
 int __init early_init_dt_scan_chosen_ppc(unsigned long node, const char *uname,
 					 int depth, void *data)
 {
-	unsigned long *lprop;
+	const unsigned long *lprop; /* All these set by kernel, so no need to convert endian */
 
 	/* Use common scan routine to determine if this is the chosen node */
 	if (early_init_dt_scan_chosen(node, uname, depth, data) == 0)
@@ -440,8 +440,9 @@ int __init early_init_dt_scan_chosen_ppc(unsigned long node, const char *uname,
  */
 static int __init early_init_dt_scan_drconf_memory(unsigned long node)
 {
-	__be32 *dm, *ls, *usm;
-	unsigned long l, n, flags;
+	const __be32 *dm, *ls, *usm;
+	int l;
+	unsigned long n, flags;
 	u64 base, size, memblock_size;
 	unsigned int is_kexec_kdump = 0, rngs;
 
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 52add6f3e201..2d6f5a8e19e2 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -1135,7 +1135,7 @@ void __init rtas_initialize(void)
 int __init early_init_dt_scan_rtas(unsigned long node,
 		const char *uname, int depth, void *data)
 {
-	u32 *basep, *entryp, *sizep;
+	const u32 *basep, *entryp, *sizep;
 
 	if (depth != 1 || strcmp(uname, "rtas") != 0)
 		return 0;
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index e303a6d74e3a..929e3e675868 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -250,9 +250,9 @@ static int __init htab_dt_scan_seg_sizes(unsigned long node,
 					 const char *uname, int depth,
 					 void *data)
 {
-	char *type = of_get_flat_dt_prop(node, "device_type", NULL);
-	u32 *prop;
-	unsigned long size = 0;
+	const char *type = of_get_flat_dt_prop(node, "device_type", NULL);
+	const __be32 *prop;
+	int size = 0;
 
 	/* We are scanning "cpu" nodes only */
 	if (type == NULL || strcmp(type, "cpu") != 0)
@@ -306,9 +306,9 @@ static int __init htab_dt_scan_page_sizes(unsigned long node,
 					  const char *uname, int depth,
 					  void *data)
 {
-	char *type = of_get_flat_dt_prop(node, "device_type", NULL);
-	u32 *prop;
-	unsigned long size = 0;
+	const char *type = of_get_flat_dt_prop(node, "device_type", NULL);
+	const __be32 *prop;
+	int size = 0;
 
 	/* We are scanning "cpu" nodes only */
 	if (type == NULL || strcmp(type, "cpu") != 0)
@@ -389,9 +389,9 @@ static int __init htab_dt_scan_page_sizes(unsigned long node,
 static int __init htab_dt_scan_hugepage_blocks(unsigned long node,
 					const char *uname, int depth,
 					void *data) {
-	char *type = of_get_flat_dt_prop(node, "device_type", NULL);
-	unsigned long *addr_prop;
-	u32 *page_count_prop;
+	const char *type = of_get_flat_dt_prop(node, "device_type", NULL);
+	const __be64 *addr_prop;
+	const __be32 *page_count_prop;
 	unsigned int expected_pages;
 	long unsigned int phys_addr;
 	long unsigned int block_size;
@@ -533,8 +533,8 @@ static int __init htab_dt_scan_pftsize(unsigned long node,
 				       const char *uname, int depth,
 				       void *data)
 {
-	char *type = of_get_flat_dt_prop(node, "device_type", NULL);
-	u32 *prop;
+	const char *type = of_get_flat_dt_prop(node, "device_type", NULL);
+	const __be32 *prop;
 
 	/* We are scanning "cpu" nodes only */
 	if (type == NULL || strcmp(type, "cpu") != 0)
diff --git a/arch/powerpc/platforms/52xx/efika.c b/arch/powerpc/platforms/52xx/efika.c
index 18c104820198..6e19b0ad5d26 100644
--- a/arch/powerpc/platforms/52xx/efika.c
+++ b/arch/powerpc/platforms/52xx/efika.c
@@ -199,8 +199,8 @@ static void __init efika_setup_arch(void)
 
 static int __init efika_probe(void)
 {
-	char *model = of_get_flat_dt_prop(of_get_flat_dt_root(),
-					  "model", NULL);
+	const char *model = of_get_flat_dt_prop(of_get_flat_dt_root(),
+						"model", NULL);
 
 	if (model == NULL)
 		return 0;
diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c
index c665d7de6c99..7044fd36197b 100644
--- a/arch/powerpc/platforms/chrp/setup.c
+++ b/arch/powerpc/platforms/chrp/setup.c
@@ -574,8 +574,8 @@ chrp_init2(void)
 
 static int __init chrp_probe(void)
 {
- 	char *dtype = of_get_flat_dt_prop(of_get_flat_dt_root(),
- 					  "device_type", NULL);
+	const char *dtype = of_get_flat_dt_prop(of_get_flat_dt_root(),
+						"device_type", NULL);
  	if (dtype == NULL)
  		return 0;
  	if (strcmp(dtype, "chrp"))
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index 628c564ceadb..06620ea33a8e 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -35,8 +35,8 @@ static unsigned int opal_irq_count;
 int __init early_init_dt_scan_opal(unsigned long node,
 				   const char *uname, int depth, void *data)
 {
-	const void *basep, *entryp;
-	unsigned long basesz, entrysz;
+	const void *basep, *entryp, *sizep;
+	int basesz, entrysz, runtimesz;
 
 	if (depth != 1 || strcmp(uname, "ibm,opal") != 0)
 		return 0;
@@ -50,10 +50,10 @@ int __init early_init_dt_scan_opal(unsigned long node,
 	opal.base = of_read_number(basep, basesz/4);
 	opal.entry = of_read_number(entryp, entrysz/4);
 
-	pr_debug("OPAL Base  = 0x%llx (basep=%p basesz=%ld)\n",
+	pr_debug("OPAL Base  = 0x%llx (basep=%p basesz=%d)\n",
 		 opal.base, basep, basesz);
-	pr_debug("OPAL Entry = 0x%llx (entryp=%p basesz=%ld)\n",
-		 opal.entry, entryp, entrysz);
+	pr_debug("OPAL Entry = 0x%llx (sizep=%p runtimesz=%d)\n",
+		 opal.size, sizep, runtimesz);
 
 	powerpc_firmware_features |= FW_FEATURE_OPAL;
 	if (of_flat_dt_is_compatible(node, "ibm,opal-v3")) {
@@ -105,7 +105,7 @@ int opal_get_chars(uint32_t vtermno, char *buf, int count)
 	opal_poll_events(&evt);
 	if ((evt & OPAL_EVENT_CONSOLE_INPUT) == 0)
 		return 0;
-	len = count;
+	len = cpu_to_be64(count);
 	rc = opal_console_read(vtermno, &len, buf);
 	if (rc == OPAL_SUCCESS)
 		return len;
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index c11c8238797c..3afad933593a 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -635,7 +635,7 @@ static int __init pseries_probe_fw_features(unsigned long node,
 					    void *data)
 {
 	const char *prop;
-	unsigned long len;
+	int len;
 	static int hypertas_found;
 	static int vec5_found;
 
@@ -668,7 +668,7 @@ static int __init pseries_probe_fw_features(unsigned long node,
 static int __init pSeries_probe(void)
 {
 	unsigned long root = of_get_flat_dt_root();
- 	char *dtype = of_get_flat_dt_prop(root, "device_type", NULL);
+	const char *dtype = of_get_flat_dt_prop(root, "device_type", NULL);
 
  	if (dtype == NULL)
  		return 0;
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index d45e602f4328..8f4484acbb08 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -222,6 +222,43 @@ static int __init parse_bootparam(const bp_tag_t* tag)
 }
 
 #ifdef CONFIG_OF
+bool __initdata dt_memory_scan = false;
+
+#if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
+unsigned long xtensa_kio_paddr = XCHAL_KIO_DEFAULT_PADDR;
+EXPORT_SYMBOL(xtensa_kio_paddr);
+
+static int __init xtensa_dt_io_area(unsigned long node, const char *uname,
+		int depth, void *data)
+{
+	const __be32 *ranges;
+	int len;
+
+	if (depth > 1)
+		return 0;
+
+	if (!of_flat_dt_is_compatible(node, "simple-bus"))
+		return 0;
+
+	ranges = of_get_flat_dt_prop(node, "ranges", &len);
+	if (!ranges)
+		return 1;
+	if (len == 0)
+		return 1;
+
+	xtensa_kio_paddr = of_read_ulong(ranges+1, 1);
+	/* round down to nearest 256MB boundary */
+	xtensa_kio_paddr &= 0xf0000000;
+
+	return 1;
+}
+#else
+static int __init xtensa_dt_io_area(unsigned long node, const char *uname,
+		int depth, void *data)
+{
+	return 1;
+}
+#endif
 
 void __init early_init_dt_add_memory_arch(u64 base, u64 size)
 {
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 776c62feee13..39ac2961737b 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -40,7 +40,7 @@ char *of_fdt_get_string(struct boot_param_header *blob, u32 offset)
  */
 void *of_fdt_get_property(struct boot_param_header *blob,
 		       unsigned long node, const char *name,
-		       unsigned long *size)
+		       int *size)
 {
 	unsigned long p = node;
 
@@ -90,7 +90,8 @@ int of_fdt_is_compatible(struct boot_param_header *blob,
 		      unsigned long node, const char *compat)
 {
 	const char *cp;
-	unsigned long cplen, l, score = 0;
+	int cplen;
+	unsigned long l, score = 0;
 
 	cp = of_fdt_get_property(blob, node, "compatible", &cplen);
 	if (cp == NULL)
@@ -451,8 +452,8 @@ static int __init __reserved_mem_reserve_reg(unsigned long node,
 {
 	int t_len = (dt_root_addr_cells + dt_root_size_cells) * sizeof(__be32);
 	phys_addr_t base, size;
-	unsigned long len;
-	__be32 *prop;
+	int len;
+	const __be32 *prop;
 	int nomap, first = 1;
 
 	prop = of_get_flat_dt_prop(node, "reg", &len);
@@ -495,7 +496,7 @@ static int __init __reserved_mem_reserve_reg(unsigned long node,
  */
 static int __init __reserved_mem_check_root(unsigned long node)
 {
-	__be32 *prop;
+	const __be32 *prop;
 
 	prop = of_get_flat_dt_prop(node, "#size-cells", NULL);
 	if (!prop || be32_to_cpup(prop) != dt_root_size_cells)
@@ -645,8 +646,8 @@ unsigned long __init of_get_flat_dt_root(void)
  * This function can be used within scan_flattened_dt callback to get
  * access to properties
  */
-void *__init of_get_flat_dt_prop(unsigned long node, const char *name,
-				 unsigned long *size)
+const void *__init of_get_flat_dt_prop(unsigned long node, const char *name,
+				       int *size)
 {
 	return of_fdt_get_property(initial_boot_params, node, name, size);
 }
@@ -686,8 +687,8 @@ struct fdt_scan_status {
 void __init early_init_dt_check_for_initrd(unsigned long node)
 {
 	u64 start, end;
-	unsigned long len;
-	__be32 *prop;
+	int len;
+	const __be32 *prop;
 
 	pr_debug("Looking for initrd properties... ");
 
@@ -717,7 +718,7 @@ inline void early_init_dt_check_for_initrd(unsigned long node)
 int __init early_init_dt_scan_root(unsigned long node, const char *uname,
 				   int depth, void *data)
 {
-	__be32 *prop;
+	const __be32 *prop;
 
 	if (depth != 0)
 		return 0;
@@ -739,9 +740,9 @@ int __init early_init_dt_scan_root(unsigned long node, const char *uname,
 	return 1;
 }
 
-u64 __init dt_mem_next_cell(int s, __be32 **cellp)
+u64 __init dt_mem_next_cell(int s, const __be32 **cellp)
 {
-	__be32 *p = *cellp;
+	const __be32 *p = *cellp;
 
 	*cellp = p + s;
 	return of_read_number(p, s);
@@ -753,9 +754,9 @@ u64 __init dt_mem_next_cell(int s, __be32 **cellp)
 int __init early_init_dt_scan_memory(unsigned long node, const char *uname,
 				     int depth, void *data)
 {
-	char *type = of_get_flat_dt_prop(node, "device_type", NULL);
-	__be32 *reg, *endp;
-	unsigned long l;
+	const char *type = of_get_flat_dt_prop(node, "device_type", NULL);
+	const __be32 *reg, *endp;
+	int l;
 
 	/* We are scanning "memory" nodes only */
 	if (type == NULL) {
@@ -776,7 +777,7 @@ int __init early_init_dt_scan_memory(unsigned long node, const char *uname,
 
 	endp = reg + (l / sizeof(__be32));
 
-	pr_debug("memory scan node %s, reg size %ld, data: %x %x %x %x,\n",
+	pr_debug("memory scan node %s, reg size %d, data: %x %x %x %x,\n",
 	    uname, l, reg[0], reg[1], reg[2], reg[3]);
 
 	while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) {
@@ -799,8 +800,8 @@ int __init early_init_dt_scan_memory(unsigned long node, const char *uname,
 int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
 				     int depth, void *data)
 {
-	unsigned long l;
-	char *p;
+	int l;
+	const char *p;
 
 	pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
 
diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index daaaf935911d..e420eb52e5c9 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -95,8 +95,8 @@ static int __init __reserved_mem_alloc_size(unsigned long node,
 	int t_len = (dt_root_addr_cells + dt_root_size_cells) * sizeof(__be32);
 	phys_addr_t start = 0, end = 0;
 	phys_addr_t base = 0, align = 0, size;
-	unsigned long len;
-	__be32 *prop;
+	int len;
+	const __be32 *prop;
 	int nomap;
 	int ret;
 
diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index ff627bddb9d3..461b5114d9af 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -66,7 +66,7 @@ extern char *of_fdt_get_string(struct boot_param_header *blob, u32 offset);
 extern void *of_fdt_get_property(struct boot_param_header *blob,
 				 unsigned long node,
 				 const char *name,
-				 unsigned long *size);
+				 int *size);
 extern int of_fdt_is_compatible(struct boot_param_header *blob,
 				unsigned long node,
 				const char *compat);
@@ -85,8 +85,8 @@ extern char *find_flat_dt_string(u32 offset);
 extern int of_scan_flat_dt(int (*it)(unsigned long node, const char *uname,
 				     int depth, void *data),
 			   void *data);
-extern void *of_get_flat_dt_prop(unsigned long node, const char *name,
-				 unsigned long *size);
+extern const void *of_get_flat_dt_prop(unsigned long node, const char *name,
+				       int *size);
 extern int of_flat_dt_is_compatible(unsigned long node, const char *name);
 extern int of_flat_dt_match(unsigned long node, const char *const *matches);
 extern unsigned long of_get_flat_dt_root(void);
@@ -101,7 +101,7 @@ extern void early_init_dt_add_memory_arch(u64 base, u64 size);
 extern int early_init_dt_reserve_memory_arch(phys_addr_t base, phys_addr_t size,
 					     bool no_map);
 extern void * early_init_dt_alloc_memory_arch(u64 size, u64 align);
-extern u64 dt_mem_next_cell(int s, __be32 **cellp);
+extern u64 dt_mem_next_cell(int s, const __be32 **cellp);
 
 /*
  * If BLK_DEV_INITRD, the fdt early init code will call this function,