Merge tag 'devicetree-for-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull devicetree updates from Rob Herring:
 "Bindings:

   - Enable dtc "interrupt_provider" warnings for binding examples. Fix
     the warnings in fsl,mu-msi and ti,sci-inta due to this.

   - Convert zii,rave-sp-wdt, zii,rave-sp-pwrbutton, and
     altr,fpga-passive-serial to DT schema format

   - Add some documentation on the different forms of YAML text blocks
     which are a constant source of review comments

   - Fix some schema errors in constraints for arrays

   - Add compatibles for qcom,sar2130p-pdc and onnn,adt7462

  DT core:

   - Allow overlay kunit tests to run CONFIG_OF_OVERLAY=n

   - Add some warnings on deprecated address handling

   - Rework early_init_dt_scan() so the arch can pass in the phys
     address of the DTB as __pa() is not always valid to use. This fixes
     a warning for arm64 with kexec.

   - Add and use some new DT graph iterators for iterating over ports
     and endpoints

   - Rework reserved-memory handling to be sized dynamically for fixed
     regions

   - Optimize of_modalias() to avoid a strlen() call

   - Constify struct device_node and property pointers where ever
     possible"

* tag 'devicetree-for-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (36 commits)
  of: Allow overlay kunit tests to run CONFIG_OF_OVERLAY=n
  dt-bindings: interrupt-controller: qcom,pdc: Add SAR2130P compatible
  of/address: Rework bus matching to avoid warnings
  of: WARN on deprecated #address-cells/#size-cells handling
  of/fdt: Don't use default address cell sizes for address translation
  dt-bindings: Enable dtc "interrupt_provider" warnings
  of/fdt: add dt_phys arg to early_init_dt_scan and early_init_dt_verify
  dt-bindings: cache: qcom,llcc: Fix X1E80100 reg entries
  dt-bindings: watchdog: convert zii,rave-sp-wdt.txt to yaml format
  dt-bindings: input: convert zii,rave-sp-pwrbutton.txt to yaml
  media: xilinx-tpg: use new of_graph functions
  fbdev: omapfb: use new of_graph functions
  gpu: drm: omapdrm: use new of_graph functions
  ASoC: audio-graph-card2: use new of_graph functions
  ASoC: audio-graph-card: use new of_graph functions
  ASoC: test-component: use new of_graph functions
  of: property: use new of_graph functions
  of: property: add of_graph_get_next_port_endpoint()
  of: property: add of_graph_get_next_port()
  of: module: remove strlen() call in of_modalias()
  ...

27 files changed, 392 insertions, 247 deletions

diff --git a/drivers/gpu/drm/omapdrm/dss/dpi.c b/drivers/gpu/drm/omapdrm/dss/dpi.c
index 030f997eccd0..b17e77f700dd 100644
--- a/drivers/gpu/drm/omapdrm/dss/dpi.c
+++ b/drivers/gpu/drm/omapdrm/dss/dpi.c
@@ -16,6 +16,7 @@
 #include <linux/export.h>
 #include <linux/kernel.h>
 #include <linux/of.h>
+#include <linux/of_graph.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/string.h>
@@ -709,7 +710,7 @@ int dpi_init_port(struct dss_device *dss, struct platform_device *pdev,
 	if (!dpi)
 		return -ENOMEM;
 
-	ep = of_get_next_child(port, NULL);
+	ep = of_graph_get_next_port_endpoint(port, NULL);
 	if (!ep)
 		return 0;
 
diff --git a/drivers/gpu/drm/omapdrm/dss/sdi.c b/drivers/gpu/drm/omapdrm/dss/sdi.c
index 91eaae3b9481..f9ae358e8e52 100644
--- a/drivers/gpu/drm/omapdrm/dss/sdi.c
+++ b/drivers/gpu/drm/omapdrm/dss/sdi.c
@@ -11,6 +11,7 @@
 #include <linux/export.h>
 #include <linux/kernel.h>
 #include <linux/of.h>
+#include <linux/of_graph.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/string.h>
@@ -346,7 +347,7 @@ int sdi_init_port(struct dss_device *dss, struct platform_device *pdev,
 	if (!sdi)
 		return -ENOMEM;
 
-	ep = of_get_next_child(port, NULL);
+	ep = of_graph_get_next_port_endpoint(port, NULL);
 	if (!ep) {
 		r = 0;
 		goto err_free;
diff --git a/drivers/media/platform/xilinx/xilinx-tpg.c b/drivers/media/platform/xilinx/xilinx-tpg.c
index e05e528ffc6f..1d67f576a44f 100644
--- a/drivers/media/platform/xilinx/xilinx-tpg.c
+++ b/drivers/media/platform/xilinx/xilinx-tpg.c
@@ -13,6 +13,7 @@
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_graph.h>
 #include <linux/platform_device.h>
 #include <linux/xilinx-v4l2-controls.h>
 
@@ -711,22 +712,13 @@ static int xtpg_parse_of(struct xtpg_device *xtpg)
 {
 	struct device *dev = xtpg->xvip.dev;
 	struct device_node *node = xtpg->xvip.dev->of_node;
-	struct device_node *ports;
-	struct device_node *port;
 	unsigned int nports = 0;
 	bool has_endpoint = false;
 
-	ports = of_get_child_by_name(node, "ports");
-	if (ports == NULL)
-		ports = node;
-
-	for_each_child_of_node(ports, port) {
+	for_each_of_graph_port(node, port) {
 		const struct xvip_video_format *format;
 		struct device_node *endpoint;
 
-		if (!of_node_name_eq(port, "port"))
-			continue;
-
 		format = xvip_of_get_format(port);
 		if (IS_ERR(format)) {
 			dev_err(dev, "invalid format in DT");
@@ -744,7 +736,7 @@ static int xtpg_parse_of(struct xtpg_device *xtpg)
 		}
 
 		if (nports == 0) {
-			endpoint = of_get_next_child(port, NULL);
+			endpoint = of_graph_get_next_port_endpoint(port, NULL);
 			if (endpoint)
 				has_endpoint = true;
 			of_node_put(endpoint);
diff --git a/drivers/of/.kunitconfig b/drivers/of/.kunitconfig
index 4c53d2c7a275..7d570cb922a1 100644
--- a/drivers/of/.kunitconfig
+++ b/drivers/of/.kunitconfig
@@ -1,4 +1,5 @@
 CONFIG_KUNIT=y
 CONFIG_OF=y
 CONFIG_OF_KUNIT_TEST=y
+CONFIG_OF_OVERLAY=y
 CONFIG_OF_OVERLAY_KUNIT_TEST=y
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index 0e2d608c3e20..f0b8cc23c46d 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -111,7 +111,7 @@ config OF_OVERLAY_KUNIT_TEST
 	tristate "Device Tree overlay KUnit tests" if !KUNIT_ALL_TESTS
 	depends on KUNIT
 	default KUNIT_ALL_TESTS
-	select OF_OVERLAY
+	select DTC
 	help
 	  This option builds KUnit unit tests for the device tree overlay code.
 
diff --git a/drivers/of/address.c b/drivers/of/address.c
index 286f0c161e33..c5b925ac469f 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -147,7 +147,7 @@ static unsigned int of_bus_pci_get_flags(const __be32 *addr)
  * PCI bus specific translator
  */
 
-static bool of_node_is_pcie(struct device_node *np)
+static bool of_node_is_pcie(const struct device_node *np)
 {
 	bool is_pcie = of_node_name_eq(np, "pcie");
 
@@ -230,8 +230,8 @@ static int __of_address_resource_bounds(struct resource *r, u64 start, u64 size)
  * To guard against that we try to register the IO range first.
  * If that fails we know that pci_address_to_pio() will do too.
  */
-int of_pci_range_to_resource(struct of_pci_range *range,
-			     struct device_node *np, struct resource *res)
+int of_pci_range_to_resource(const struct of_pci_range *range,
+			     const struct device_node *np, struct resource *res)
 {
 	u64 start;
 	int err;
@@ -333,14 +333,18 @@ static unsigned int of_bus_isa_get_flags(const __be32 *addr)
 
 static int of_bus_default_flags_match(struct device_node *np)
 {
-	return of_bus_n_addr_cells(np) == 3;
+	/*
+	 * Check for presence first since of_bus_n_addr_cells() will warn when
+	 * walking parent nodes.
+	 */
+	return of_property_present(np, "#address-cells") && (of_bus_n_addr_cells(np) == 3);
 }
 
 /*
  * Array of bus specific translators
  */
 
-static struct of_bus of_busses[] = {
+static const struct of_bus of_busses[] = {
 #ifdef CONFIG_PCI
 	/* PCI */
 	{
@@ -388,7 +392,7 @@ static struct of_bus of_busses[] = {
 	},
 };
 
-static struct of_bus *of_match_bus(struct device_node *np)
+static const struct of_bus *of_match_bus(struct device_node *np)
 {
 	int i;
 
@@ -399,7 +403,7 @@ static struct of_bus *of_match_bus(struct device_node *np)
 	return NULL;
 }
 
-static int of_empty_ranges_quirk(struct device_node *np)
+static int of_empty_ranges_quirk(const struct device_node *np)
 {
 	if (IS_ENABLED(CONFIG_PPC)) {
 		/* To save cycles, we cache the result for global "Mac" setting */
@@ -419,8 +423,8 @@ static int of_empty_ranges_quirk(struct device_node *np)
 	return false;
 }
 
-static int of_translate_one(struct device_node *parent, struct of_bus *bus,
-			    struct of_bus *pbus, __be32 *addr,
+static int of_translate_one(const struct device_node *parent, const struct of_bus *bus,
+			    const struct of_bus *pbus, __be32 *addr,
 			    int na, int ns, int pna, const char *rprop)
 {
 	const __be32 *ranges;
@@ -505,7 +509,7 @@ static u64 __of_translate_address(struct device_node *node,
 {
 	struct device_node *dev __free(device_node) = of_node_get(node);
 	struct device_node *parent __free(device_node) = get_parent(dev);
-	struct of_bus *bus, *pbus;
+	const struct of_bus *bus, *pbus;
 	__be32 addr[OF_MAX_ADDR_CELLS];
 	int na, ns, pna, pns;
 
@@ -690,7 +694,7 @@ const __be32 *__of_get_address(struct device_node *dev, int index, int bar_no,
 	const __be32 *prop;
 	unsigned int psize;
 	struct device_node *parent __free(device_node) = of_get_parent(dev);
-	struct of_bus *bus;
+	const struct of_bus *bus;
 	int onesize, i, na, ns;
 
 	if (parent == NULL)
@@ -701,16 +705,16 @@ const __be32 *__of_get_address(struct device_node *dev, int index, int bar_no,
 	if (strcmp(bus->name, "pci") && (bar_no >= 0))
 		return NULL;
 
-	bus->count_cells(dev, &na, &ns);
-	if (!OF_CHECK_ADDR_COUNT(na))
-		return NULL;
-
 	/* Get "reg" or "assigned-addresses" property */
 	prop = of_get_property(dev, bus->addresses, &psize);
 	if (prop == NULL)
 		return NULL;
 	psize /= 4;
 
+	bus->count_cells(dev, &na, &ns);
+	if (!OF_CHECK_ADDR_COUNT(na))
+		return NULL;
+
 	onesize = na + ns;
 	for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++) {
 		u32 val = be32_to_cpu(prop[0]);
@@ -1030,7 +1034,7 @@ EXPORT_SYMBOL_GPL(of_dma_is_coherent);
  * This is currently only enabled on builds that support Apple ARM devices, as
  * an optimization.
  */
-static bool of_mmio_is_nonposted(struct device_node *np)
+static bool of_mmio_is_nonposted(const struct device_node *np)
 {
 	if (!IS_ENABLED(CONFIG_ARCH_APPLE))
 		return false;
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 20603d3c9931..a8b0c42bdc8e 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -87,15 +87,25 @@ static bool __of_node_is_type(const struct device_node *np, const char *type)
 	return np && match && type && !strcmp(match, type);
 }
 
+#define EXCLUDED_DEFAULT_CELLS_PLATFORMS ( \
+	IS_ENABLED(CONFIG_SPARC) \
+)
+
 int of_bus_n_addr_cells(struct device_node *np)
 {
 	u32 cells;
 
-	for (; np; np = np->parent)
+	for (; np; np = np->parent) {
 		if (!of_property_read_u32(np, "#address-cells", &cells))
 			return cells;
-
-	/* No #address-cells property for the root node */
+		/*
+		 * Default root value and walking parent nodes for "#address-cells"
+		 * is deprecated. Any platforms which hit this warning should
+		 * be added to the excluded list.
+		 */
+		WARN_ONCE(!EXCLUDED_DEFAULT_CELLS_PLATFORMS,
+			  "Missing '#address-cells' in %pOF\n", np);
+	}
 	return OF_ROOT_NODE_ADDR_CELLS_DEFAULT;
 }
 
@@ -112,11 +122,17 @@ int of_bus_n_size_cells(struct device_node *np)
 {
 	u32 cells;
 
-	for (; np; np = np->parent)
+	for (; np; np = np->parent) {
 		if (!of_property_read_u32(np, "#size-cells", &cells))
 			return cells;
-
-	/* No #size-cells property for the root node */
+		/*
+		 * Default root value and walking parent nodes for "#size-cells"
+		 * is deprecated. Any platforms which hit this warning should
+		 * be added to the excluded list.
+		 */
+		WARN_ONCE(!EXCLUDED_DEFAULT_CELLS_PLATFORMS,
+			  "Missing '#size-cells' in %pOF\n", np);
+	}
 	return OF_ROOT_NODE_SIZE_CELLS_DEFAULT;
 }
 
@@ -270,7 +286,7 @@ EXPORT_SYMBOL(of_find_all_nodes);
 const void *__of_get_property(const struct device_node *np,
 			      const char *name, int *lenp)
 {
-	struct property *pp = __of_find_property(np, name, lenp);
+	const struct property *pp = __of_find_property(np, name, lenp);
 
 	return pp ? pp->value : NULL;
 }
@@ -282,7 +298,7 @@ const void *__of_get_property(const struct device_node *np,
 const void *of_get_property(const struct device_node *np, const char *name,
 			    int *lenp)
 {
-	struct property *pp = of_find_property(np, name, lenp);
+	const struct property *pp = of_find_property(np, name, lenp);
 
 	return pp ? pp->value : NULL;
 }
@@ -321,7 +337,7 @@ EXPORT_SYMBOL(of_get_property);
 static int __of_device_is_compatible(const struct device_node *device,
 				     const char *compat, const char *type, const char *name)
 {
-	struct property *prop;
+	const struct property *prop;
 	const char *cp;
 	int index = 0, score = 0;
 
@@ -771,7 +787,7 @@ struct device_node *of_get_child_by_name(const struct device_node *node,
 }
 EXPORT_SYMBOL(of_get_child_by_name);
 
-struct device_node *__of_find_node_by_path(struct device_node *parent,
+struct device_node *__of_find_node_by_path(const struct device_node *parent,
 						const char *path)
 {
 	struct device_node *child;
@@ -828,7 +844,7 @@ struct device_node *__of_find_node_by_full_path(struct device_node *node,
 struct device_node *of_find_node_opts_by_path(const char *path, const char **opts)
 {
 	struct device_node *np = NULL;
-	struct property *pp;
+	const struct property *pp;
 	unsigned long flags;
 	const char *separator = strchr(path, ':');
 
@@ -974,7 +990,7 @@ struct device_node *of_find_node_with_property(struct device_node *from,
 	const char *prop_name)
 {
 	struct device_node *np;
-	struct property *pp;
+	const struct property *pp;
 	unsigned long flags;
 
 	raw_spin_lock_irqsave(&devtree_lock, flags);
@@ -1769,7 +1785,7 @@ static void of_alias_add(struct alias_prop *ap, struct device_node *np,
  */
 void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align))
 {
-	struct property *pp;
+	const struct property *pp;
 
 	of_aliases = of_find_node_by_path("/aliases");
 	of_chosen = of_find_node_by_path("/chosen");
@@ -1840,7 +1856,7 @@ void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align))
  *
  * Return: The alias id if found.
  */
-int of_alias_get_id(struct device_node *np, const char *stem)
+int of_alias_get_id(const struct device_node *np, const char *stem)
 {
 	struct alias_prop *app;
 	int id = -ENODEV;
@@ -1898,7 +1914,7 @@ EXPORT_SYMBOL_GPL(of_alias_get_highest_id);
  *
  * Return: TRUE if console successfully setup. Otherwise return FALSE.
  */
-bool of_console_check(struct device_node *dn, char *name, int index)
+bool of_console_check(const struct device_node *dn, char *name, int index)
 {
 	if (!dn || dn != of_stdout || console_set_on_cmdline)
 		return false;
@@ -1986,7 +2002,7 @@ int of_find_last_cache_level(unsigned int cpu)
  *
  * Return: 0 on success or a standard error code on failure.
  */
-int of_map_id(struct device_node *np, u32 id,
+int of_map_id(const struct device_node *np, u32 id,
 	       const char *map_name, const char *map_mask_name,
 	       struct device_node **target, u32 *id_out)
 {
diff --git a/drivers/of/cpu.c b/drivers/of/cpu.c
index d17b2f851082..5214dc3d05ae 100644
--- a/drivers/of/cpu.c
+++ b/drivers/of/cpu.c
@@ -188,7 +188,7 @@ EXPORT_SYMBOL(of_cpu_node_to_id);
  * Return: An idle state node if found at @index. The refcount is incremented
  * for it, so call of_node_put() on it when done. Returns NULL if not found.
  */
-struct device_node *of_get_cpu_state_node(struct device_node *cpu_node,
+struct device_node *of_get_cpu_state_node(const struct device_node *cpu_node,
 					  int index)
 {
 	struct of_phandle_args args;
diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
index 110104a936d9..d45a8df61380 100644
--- a/drivers/of/dynamic.c
+++ b/drivers/of/dynamic.c
@@ -536,7 +536,7 @@ static void __of_changeset_entry_destroy(struct of_changeset_entry *ce)
 	kfree(ce);
 }
 
-static void __of_changeset_entry_invert(struct of_changeset_entry *ce,
+static void __of_changeset_entry_invert(const struct of_changeset_entry *ce,
 					  struct of_changeset_entry *rce)
 {
 	memcpy(rce, ce, sizeof(*rce));
@@ -636,7 +636,7 @@ static int __of_changeset_entry_apply(struct of_changeset_entry *ce)
 	return 0;
 }
 
-static inline int __of_changeset_entry_revert(struct of_changeset_entry *ce)
+static inline int __of_changeset_entry_revert(const struct of_changeset_entry *ce)
 {
 	struct of_changeset_entry ce_inverted;
 
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 4d528c10df3a..0121100372b4 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -457,6 +457,7 @@ int __initdata dt_root_addr_cells;
 int __initdata dt_root_size_cells;
 
 void *initial_boot_params __ro_after_init;
+phys_addr_t initial_boot_params_pa __ro_after_init;
 
 #ifdef CONFIG_OF_EARLY_FLATTREE
 
@@ -511,8 +512,6 @@ void __init early_init_fdt_scan_reserved_mem(void)
 			break;
 		memblock_reserve(base, size);
 	}
-
-	fdt_init_reserved_mem();
 }
 
 /**
@@ -938,12 +937,12 @@ int __init early_init_dt_scan_root(void)
 	dt_root_addr_cells = OF_ROOT_NODE_ADDR_CELLS_DEFAULT;
 
 	prop = of_get_flat_dt_prop(node, "#size-cells", NULL);
-	if (prop)
+	if (!WARN(!prop, "No '#size-cells' in root node\n"))
 		dt_root_size_cells = be32_to_cpup(prop);
 	pr_debug("dt_root_size_cells = %x\n", dt_root_size_cells);
 
 	prop = of_get_flat_dt_prop(node, "#address-cells", NULL);
-	if (prop)
+	if (!WARN(!prop, "No '#address-cells' in root node\n"))
 		dt_root_addr_cells = be32_to_cpup(prop);
 	pr_debug("dt_root_addr_cells = %x\n", dt_root_addr_cells);
 
@@ -1136,17 +1135,18 @@ static void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
 	return ptr;
 }
 
-bool __init early_init_dt_verify(void *params)
+bool __init early_init_dt_verify(void *dt_virt, phys_addr_t dt_phys)
 {
-	if (!params)
+	if (!dt_virt)
 		return false;
 
 	/* check device tree validity */
-	if (fdt_check_header(params))
+	if (fdt_check_header(dt_virt))
 		return false;
 
 	/* Setup flat device-tree pointer */
-	initial_boot_params = params;
+	initial_boot_params = dt_virt;
+	initial_boot_params_pa = dt_phys;
 	of_fdt_crc32 = crc32_be(~0, initial_boot_params,
 				fdt_totalsize(initial_boot_params));
 
@@ -1173,11 +1173,11 @@ void __init early_init_dt_scan_nodes(void)
 	early_init_dt_check_for_usable_mem_range();
 }
 
-bool __init early_init_dt_scan(void *params)
+bool __init early_init_dt_scan(void *dt_virt, phys_addr_t dt_phys)
 {
 	bool status;
 
-	status = early_init_dt_verify(params);
+	status = early_init_dt_verify(dt_virt, dt_phys);
 	if (!status)
 		return false;
 
@@ -1212,6 +1212,9 @@ void __init unflatten_device_tree(void)
 {
 	void *fdt = initial_boot_params;
 
+	/* Save the statically-placed regions in the reserved_mem array */
+	fdt_scan_reserved_mem_reg_nodes();
+
 	/* Don't use the bootloader provided DTB if ACPI is enabled */
 	if (!acpi_disabled)
 		fdt = NULL;
diff --git a/drivers/of/fdt_address.c b/drivers/of/fdt_address.c
index 1dc15ab78b10..9804d7f06705 100644
--- a/drivers/of/fdt_address.c
+++ b/drivers/of/fdt_address.c
@@ -55,7 +55,7 @@ static void __init fdt_bus_default_count_cells(const void *blob, int parentoffse
 		if (prop)
 			*addrc = be32_to_cpup(prop);
 		else
-			*addrc = dt_root_addr_cells;
+			*addrc = -1;
 	}
 
 	if (sizec) {
@@ -63,7 +63,7 @@ static void __init fdt_bus_default_count_cells(const void *blob, int parentoffse
 		if (prop)
 			*sizec = be32_to_cpup(prop);
 		else
-			*sizec = dt_root_size_cells;
+			*sizec = -1;
 	}
 }
 
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index a494f56a0d0e..67fc0ceaa5f5 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -720,7 +720,7 @@ struct irq_domain *of_msi_map_get_device_domain(struct device *dev, u32 id,
  * Returns: the MSI domain for this device (or NULL on failure).
  */
 struct irq_domain *of_msi_get_domain(struct device *dev,
-				     struct device_node *np,
+				     const struct device_node *np,
 				     enum irq_domain_bus_token token)
 {
 	struct of_phandle_iterator it;
@@ -742,7 +742,7 @@ EXPORT_SYMBOL_GPL(of_msi_get_domain);
  * @dev: device structure to associate with an MSI irq domain
  * @np: device node for that device
  */
-void of_msi_configure(struct device *dev, struct device_node *np)
+void of_msi_configure(struct device *dev, const struct device_node *np)
 {
 	dev_set_msi_domain(dev,
 			   of_msi_get_domain(dev, np, DOMAIN_BUS_PLATFORM_MSI));
diff --git a/drivers/of/kexec.c b/drivers/of/kexec.c
index 9ccde2fd77cb..5b924597a4de 100644
--- a/drivers/of/kexec.c
+++ b/drivers/of/kexec.c
@@ -301,7 +301,7 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
 	}
 
 	/* Remove memory reservation for the current device tree. */
-	ret = fdt_find_and_del_mem_rsv(fdt, __pa(initial_boot_params),
+	ret = fdt_find_and_del_mem_rsv(fdt, initial_boot_params_pa,
 				       fdt_totalsize(initial_boot_params));
 	if (ret == -EINVAL) {
 		pr_err("Error removing memory reservation.\n");
diff --git a/drivers/of/kobj.c b/drivers/of/kobj.c
index 3dbce1e6f184..cab9b169dc67 100644
--- a/drivers/of/kobj.c
+++ b/drivers/of/kobj.c
@@ -37,7 +37,7 @@ static ssize_t of_node_property_read(struct file *filp, struct kobject *kobj,
 }
 
 /* always return newly allocated name, caller must free after use */
-static const char *safe_name(struct kobject *kobj, const char *orig_name)
+static const char *safe_name(const struct kobject *kobj, const char *orig_name)
 {
 	const char *name = orig_name;
 	struct kernfs_node *kn;
@@ -84,7 +84,7 @@ int __of_add_property_sysfs(struct device_node *np, struct property *pp)
 	return rc;
 }
 
-void __of_sysfs_remove_bin_file(struct device_node *np, struct property *prop)
+void __of_sysfs_remove_bin_file(struct device_node *np, const struct property *prop)
 {
 	if (!IS_ENABLED(CONFIG_SYSFS))
 		return;
@@ -93,7 +93,7 @@ void __of_sysfs_remove_bin_file(struct device_node *np, struct property *prop)
 	kfree(prop->attr.attr.name);
 }
 
-void __of_remove_property_sysfs(struct device_node *np, struct property *prop)
+void __of_remove_property_sysfs(struct device_node *np, const struct property *prop)
 {
 	/* at early boot, bail here and defer setup to of_init() */
 	if (of_kset && of_node_is_attached(np))
@@ -101,7 +101,7 @@ void __of_remove_property_sysfs(struct device_node *np, struct property *prop)
 }
 
 void __of_update_property_sysfs(struct device_node *np, struct property *newprop,
-		struct property *oldprop)
+		const struct property *oldprop)
 {
 	/* At early boot, bail out and defer setup to of_init() */
 	if (!of_kset)
diff --git a/drivers/of/module.c b/drivers/of/module.c
index 780fd82a7ecc..1e735fc130ad 100644
--- a/drivers/of/module.c
+++ b/drivers/of/module.c
@@ -35,12 +35,10 @@ ssize_t of_modalias(const struct device_node *np, char *str, ssize_t len)
 	str += csize;
 
 	of_property_for_each_string(np, "compatible", p, compat) {
-		csize = strlen(compat) + 1;
+		csize = snprintf(str, len, "C%s", compat);
 		tsize += csize;
 		if (csize >= len)
 			continue;
-
-		csize = snprintf(str, len, "C%s", compat);
 		for (c = str; c; ) {
 			c = strchr(c, ' ');
 			if (c)
diff --git a/drivers/of/of_numa.c b/drivers/of/of_numa.c
index 2ec20886d176..230d5f628c1b 100644
--- a/drivers/of/of_numa.c
+++ b/drivers/of/of_numa.c
@@ -14,9 +14,6 @@
 
 #include <asm/numa.h>
 
-/* define default numa node to 0 */
-#define DEFAULT_NODE 0
-
 /*
  * Even though we connect cpus to numa domains later in SMP
  * init, we need to know the node ids now for all cpus.
diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h
index c235d6c909a1..ea5a0951ec5e 100644
--- a/drivers/of/of_private.h
+++ b/drivers/of/of_private.h
@@ -9,6 +9,7 @@
  */
 
 #define FDT_ALIGN_SIZE 8
+#define MAX_RESERVED_REGIONS    64
 
 /**
  * struct alias_prop - Alias property in 'aliases' node
@@ -72,9 +73,9 @@ static inline void of_platform_register_reconfig_notifier(void) { }
 #if defined(CONFIG_OF_KOBJ)
 int of_node_is_attached(const struct device_node *node);
 int __of_add_property_sysfs(struct device_node *np, struct property *pp);
-void __of_remove_property_sysfs(struct device_node *np, struct property *prop);
+void __of_remove_property_sysfs(struct device_node *np, const struct property *prop);
 void __of_update_property_sysfs(struct device_node *np, struct property *newprop,
-		struct property *oldprop);
+		const struct property *oldprop);
 int __of_attach_node_sysfs(struct device_node *np);
 void __of_detach_node_sysfs(struct device_node *np);
 #else
@@ -82,9 +83,9 @@ static inline int __of_add_property_sysfs(struct device_node *np, struct propert
 {
 	return 0;
 }
-static inline void __of_remove_property_sysfs(struct device_node *np, struct property *prop) {}
+static inline void __of_remove_property_sysfs(struct device_node *np, const struct property *prop) {}
 static inline void __of_update_property_sysfs(struct device_node *np,
-		struct property *newprop, struct property *oldprop) {}
+		struct property *newprop, const struct property *oldprop) {}
 static inline int __of_attach_node_sysfs(struct device_node *np)
 {
 	return 0;
@@ -130,7 +131,7 @@ void __of_prop_free(struct property *prop);
 struct device_node *__of_node_dup(const struct device_node *np,
 				  const char *full_name);
 
-struct device_node *__of_find_node_by_path(struct device_node *parent,
+struct device_node *__of_find_node_by_path(const struct device_node *parent,
 						const char *path);
 struct device_node *__of_find_node_by_full_path(struct device_node *node,
 						const char *path);
@@ -145,7 +146,7 @@ extern int __of_update_property(struct device_node *np,
 extern void __of_detach_node(struct device_node *np);
 
 extern void __of_sysfs_remove_bin_file(struct device_node *np,
-				       struct property *prop);
+				       const struct property *prop);
 
 /* illegal phandle value (set when unresolved) */
 #define OF_PHANDLE_ILLEGAL	0xdeadbeef
@@ -183,7 +184,7 @@ static inline struct device_node *__of_get_dma_parent(const struct device_node *
 #endif
 
 int fdt_scan_reserved_mem(void);
-void fdt_init_reserved_mem(void);
+void __init fdt_scan_reserved_mem_reg_nodes(void);
 
 bool of_fdt_device_is_available(const void *blob, unsigned long node);
 
diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 46e1c3fbc769..45517b9e57b1 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -27,8 +27,9 @@
 
 #include "of_private.h"
 
-#define MAX_RESERVED_REGIONS	64
-static struct reserved_mem reserved_mem[MAX_RESERVED_REGIONS];
+static struct reserved_mem reserved_mem_array[MAX_RESERVED_REGIONS] __initdata;
+static struct reserved_mem *reserved_mem __refdata = reserved_mem_array;
+static int total_reserved_mem_cnt = MAX_RESERVED_REGIONS;
 static int reserved_mem_count;
 
 static int __init early_init_dt_alloc_reserved_memory_arch(phys_addr_t size,
@@ -57,6 +58,51 @@ static int __init early_init_dt_alloc_reserved_memory_arch(phys_addr_t size,
 }
 
 /*
+ * alloc_reserved_mem_array() - allocate memory for the reserved_mem
+ * array using memblock
+ *
+ * This function is used to allocate memory for the reserved_mem
+ * array according to the total number of reserved memory regions
+ * defined in the DT.
+ * After the new array is allocated, the information stored in
+ * the initial static array is copied over to this new array and
+ * the new array is used from this point on.
+ */
+static void __init alloc_reserved_mem_array(void)
+{
+	struct reserved_mem *new_array;
+	size_t alloc_size, copy_size, memset_size;
+
+	alloc_size = array_size(total_reserved_mem_cnt, sizeof(*new_array));
+	if (alloc_size == SIZE_MAX) {
+		pr_err("Failed to allocate memory for reserved_mem array with err: %d", -EOVERFLOW);
+		return;
+	}
+
+	new_array = memblock_alloc(alloc_size, SMP_CACHE_BYTES);
+	if (!new_array) {
+		pr_err("Failed to allocate memory for reserved_mem array with err: %d", -ENOMEM);
+		return;
+	}
+