Merge tag 'devicetree-for-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull devicetree updates from Rob Herring:

 - Refactor arch kdump DT related code to a common implementation

 - Add fw_devlink tracking for 'phy-handle', 'leds', 'backlight',
   'resets', and 'pwm' properties

 - Various clean-ups to DT FDT code

 - Fix a runtime error for !CONFIG_SYSFS

 - Convert Synopsys DW PCI and derivative binding docs to schemas. Add
   Toshiba Visconti PCIe binding.

 - Convert a bunch of memory controller bindings to schemas

 - Covert eeprom-93xx46, Samsung Exynos TRNG, Samsung Exynos IRQ
   combiner, arm-charlcd, img-ascii-lcd, UniPhier eFuse, Xilinx Zynq
   MPSoC FPGA, Xilinx Zynq MPSoC reset, Mediatek mmsys, Gemini boards,
   brcm,iproc-i2c, faraday,ftpci100, and ks8851 net to DT schema.

 - Extend nvmem bindings to handle bit offsets in unit-addresses

 - Add DT schemas for HiKey 970 PCIe PHY

 - Remove unused ZTE, energymicro,efm32-timer, and Exynos SATA bindings

 - Enable dtc pci_device_reg warning by default

 - Fixes for handling 'unevaluatedProperties' in preparation to enable
   pending support in the tooling for jsonschema 2020-12 draft

* tag 'devicetree-for-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (78 commits)
  dt-bindings: display: remove zte,vou.txt binding doc
  dt-bindings: hwmon: merge max1619 into trivial devices
  dt-bindings: mtd-physmap: Add 'arm,vexpress-flash' compatible
  dt-bindings: PCI: imx6: convert the imx pcie controller to dtschema
  dt-bindings: Use 'enum' instead of 'oneOf' plus 'const' entries
  dt-bindings: Add vendor prefix for Topic Embedded Systems
  of: fdt: Rename reserve_elfcorehdr() to fdt_reserve_elfcorehdr()
  arm64: kdump: Remove custom linux,usable-memory-range handling
  arm64: kdump: Remove custom linux,elfcorehdr handling
  riscv: Remove non-standard linux,elfcorehdr handling
  of: fdt: Use IS_ENABLED(CONFIG_BLK_DEV_INITRD) instead of #ifdef
  of: fdt: Add generic support for handling usable memory range property
  of: fdt: Add generic support for handling elf core headers property
  crash_dump: Make elfcorehdr address/size symbols always visible
  dt-bindings: memory: convert Samsung Exynos DMC to dtschema
  dt-bindings: devfreq: event: convert Samsung Exynos PPMU to dtschema
  dt-bindings: devfreq: event: convert Samsung Exynos NoCP to dtschema
  kbuild: Enable dtc 'pci_device_reg' warning by default
  dt-bindings: soc: remove obsolete zte zx header
  dt-bindings: clock: remove obsolete zte zx header
  ...

5 files changed, 131 insertions, 62 deletions

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 5883d63c7714..f720c0d246f2 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -708,9 +708,7 @@ static struct device_node *__of_get_next_child(const struct device_node *node,
 		return NULL;
 
 	next = prev ? prev->sibling : node->child;
-	for (; next; next = next->sibling)
-		if (of_node_get(next))
-			break;
+	of_node_get(next);
 	of_node_put(prev);
 	return next;
 }
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index e0f96e3ef1da..4546572af24b 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -8,6 +8,7 @@
 
 #define pr_fmt(fmt)	"OF: fdt: " fmt
 
+#include <linux/crash_dump.h>
 #include <linux/crc32.h>
 #include <linux/kernel.h>
 #include <linux/initrd.h>
@@ -193,16 +194,12 @@ static void populate_properties(const void *blob,
 			pp->length = len;
 			pp->value  = pp + 1;
 			*pprev     = pp;
-			pprev      = &pp->next;
 			memcpy(pp->value, ps, len - 1);
 			((char *)pp->value)[len - 1] = 0;
 			pr_debug("fixed up name for %s -> %s\n",
 				 nodename, (char *)pp->value);
 		}
 	}
-
-	if (!dryrun)
-		*pprev = NULL;
 }
 
 static int populate_node(const void *blob,
@@ -479,6 +476,22 @@ void *initial_boot_params __ro_after_init;
 
 static u32 of_fdt_crc32;
 
+static int __init early_init_dt_reserve_memory_arch(phys_addr_t base,
+					phys_addr_t size, bool nomap)
+{
+	if (nomap) {
+		/*
+		 * If the memory is already reserved (by another region), we
+		 * should not allow it to be marked nomap.
+		 */
+		if (memblock_is_region_reserved(base, size))
+			return -EBUSY;
+
+		return memblock_mark_nomap(base, size);
+	}
+	return memblock_reserve(base, size);
+}
+
 /*
  * __reserved_mem_reserve_reg() - reserve all memory described in 'reg' property
  */
@@ -585,6 +598,30 @@ static int __init __fdt_scan_reserved_mem(unsigned long node, const char *uname,
 	return 0;
 }
 
+/*
+ * fdt_reserve_elfcorehdr() - reserves memory for elf core header
+ *
+ * This function reserves the memory occupied by an elf core header
+ * described in the device tree. This region contains all the
+ * information about primary kernel's core image and is used by a dump
+ * capture kernel to access the system memory on primary kernel.
+ */
+static void __init fdt_reserve_elfcorehdr(void)
+{
+	if (!IS_ENABLED(CONFIG_CRASH_DUMP) || !elfcorehdr_size)
+		return;
+
+	if (memblock_is_region_reserved(elfcorehdr_addr, elfcorehdr_size)) {
+		pr_warn("elfcorehdr is overlapped\n");
+		return;
+	}
+
+	memblock_reserve(elfcorehdr_addr, elfcorehdr_size);
+
+	pr_info("Reserving %llu KiB of memory at 0x%llx for elfcorehdr\n",
+		elfcorehdr_size >> 10, elfcorehdr_addr);
+}
+
 /**
  * early_init_fdt_scan_reserved_mem() - create reserved memory regions
  *
@@ -610,6 +647,7 @@ void __init early_init_fdt_scan_reserved_mem(void)
 
 	of_scan_flat_dt(__fdt_scan_reserved_mem, NULL);
 	fdt_init_reserved_mem();
+	fdt_reserve_elfcorehdr();
 }
 
 /**
@@ -858,7 +896,6 @@ const void * __init of_flat_dt_match_machine(const void *default_match,
 	return best_data;
 }
 
-#ifdef CONFIG_BLK_DEV_INITRD
 static void __early_init_dt_declare_initrd(unsigned long start,
 					   unsigned long end)
 {
@@ -884,6 +921,9 @@ static void __init early_init_dt_check_for_initrd(unsigned long node)
 	int len;
 	const __be32 *prop;
 
+	if (!IS_ENABLED(CONFIG_BLK_DEV_INITRD))
+		return;
+
 	pr_debug("Looking for initrd properties... ");
 
 	prop = of_get_flat_dt_prop(node, "linux,initrd-start", &len);
@@ -902,11 +942,58 @@ static void __init early_init_dt_check_for_initrd(unsigned long node)
 
 	pr_debug("initrd_start=0x%llx  initrd_end=0x%llx\n", start, end);
 }
-#else
-static inline void early_init_dt_check_for_initrd(unsigned long node)
+
+/**
+ * early_init_dt_check_for_elfcorehdr - Decode elfcorehdr location from flat
+ * tree
+ * @node: reference to node containing elfcorehdr location ('chosen')
+ */
+static void __init early_init_dt_check_for_elfcorehdr(unsigned long node)
+{
+	const __be32 *prop;
+	int len;
+
+	if (!IS_ENABLED(CONFIG_CRASH_DUMP))
+		return;
+
+	pr_debug("Looking for elfcorehdr property... ");
+
+	prop = of_get_flat_dt_prop(node, "linux,elfcorehdr", &len);
+	if (!prop || (len < (dt_root_addr_cells + dt_root_size_cells)))
+		return;
+
+	elfcorehdr_addr = dt_mem_next_cell(dt_root_addr_cells, &prop);
+	elfcorehdr_size = dt_mem_next_cell(dt_root_size_cells, &prop);
+
+	pr_debug("elfcorehdr_start=0x%llx elfcorehdr_size=0x%llx\n",
+		 elfcorehdr_addr, elfcorehdr_size);
+}
+
+static phys_addr_t cap_mem_addr;
+static phys_addr_t cap_mem_size;
+
+/**
+ * early_init_dt_check_for_usable_mem_range - Decode usable memory range
+ * location from flat tree
+ * @node: reference to node containing usable memory range location ('chosen')
+ */
+static void __init early_init_dt_check_for_usable_mem_range(unsigned long node)
 {
+	const __be32 *prop;
+	int len;
+
+	pr_debug("Looking for usable-memory-range property... ");
+
+	prop = of_get_flat_dt_prop(node, "linux,usable-memory-range", &len);
+	if (!prop || (len < (dt_root_addr_cells + dt_root_size_cells)))
+		return;
+
+	cap_mem_addr = dt_mem_next_cell(dt_root_addr_cells, &prop);
+	cap_mem_size = dt_mem_next_cell(dt_root_size_cells, &prop);
+
+	pr_debug("cap_mem_start=%pa cap_mem_size=%pa\n", &cap_mem_addr,
+		 &cap_mem_size);
 }
-#endif /* CONFIG_BLK_DEV_INITRD */
 
 #ifdef CONFIG_SERIAL_EARLYCON
 
@@ -1033,7 +1120,7 @@ int __init early_init_dt_scan_memory(unsigned long node, const char *uname,
 		if (!hotpluggable)
 			continue;
 
-		if (early_init_dt_mark_hotplug_memory_arch(base, size))
+		if (memblock_mark_hotplug(base, size))
 			pr_warn("failed to mark hotplug range 0x%llx - 0x%llx\n",
 				base, base + size);
 	}
@@ -1055,6 +1142,8 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
 		return 0;
 
 	early_init_dt_check_for_initrd(node);
+	early_init_dt_check_for_elfcorehdr(node);
+	early_init_dt_check_for_usable_mem_range(node);
 
 	/* Retrieve command line */
 	p = of_get_flat_dt_prop(node, "bootargs", &l);
@@ -1146,27 +1235,6 @@ void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
 	memblock_add(base, size);
 }
 
-int __init __weak early_init_dt_mark_hotplug_memory_arch(u64 base, u64 size)
-{
-	return memblock_mark_hotplug(base, size);
-}
-
-int __init __weak early_init_dt_reserve_memory_arch(phys_addr_t base,
-					phys_addr_t size, bool nomap)
-{
-	if (nomap) {
-		/*
-		 * If the memory is already reserved (by another region), we
-		 * should not allow it to be marked nomap.
-		 */
-		if (memblock_is_region_reserved(base, size))
-			return -EBUSY;
-
-		return memblock_mark_nomap(base, size);
-	}
-	return memblock_reserve(base, size);
-}
-
 static void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
 {
 	void *ptr = memblock_alloc(size, align);
@@ -1199,16 +1267,19 @@ void __init early_init_dt_scan_nodes(void)
 {
 	int rc = 0;
 
+	/* Initialize {size,address}-cells info */
+	of_scan_flat_dt(early_init_dt_scan_root, NULL);
+
 	/* Retrieve various information from the /chosen node */
 	rc = of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line);
 	if (!rc)
 		pr_warn("No chosen node found, continuing without\n");
 
-	/* Initialize {size,address}-cells info */
-	of_scan_flat_dt(early_init_dt_scan_root, NULL);
-
 	/* Setup memory, calling early_init_dt_add_memory_arch */
 	of_scan_flat_dt(early_init_dt_scan_memory, NULL);
+
+	/* Handle linux,usable-memory-range property */
+	memblock_cap_memory_range(cap_mem_addr, cap_mem_size);
 }
 
 bool __init early_init_dt_scan(void *params)
diff --git a/drivers/of/kexec.c b/drivers/of/kexec.c
index f335d941a716..761fd870d1db 100644
--- a/drivers/of/kexec.c
+++ b/drivers/of/kexec.c
@@ -18,14 +18,6 @@
 #include <linux/random.h>
 #include <linux/types.h>
 
-/* relevant device tree properties */
-#define FDT_PROP_KEXEC_ELFHDR	"linux,elfcorehdr"
-#define FDT_PROP_MEM_RANGE	"linux,usable-memory-range"
-#define FDT_PROP_INITRD_START	"linux,initrd-start"
-#define FDT_PROP_INITRD_END	"linux,initrd-end"
-#define FDT_PROP_BOOTARGS	"bootargs"
-#define FDT_PROP_KASLR_SEED	"kaslr-seed"
-#define FDT_PROP_RNG_SEED	"rng-seed"
 #define RNG_SEED_SIZE		128
 
 /*
@@ -310,10 +302,10 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
 		goto out;
 	}
 
-	ret = fdt_delprop(fdt, chosen_node, FDT_PROP_KEXEC_ELFHDR);
+	ret = fdt_delprop(fdt, chosen_node, "linux,elfcorehdr");
 	if (ret && ret != -FDT_ERR_NOTFOUND)
 		goto out;
-	ret = fdt_delprop(fdt, chosen_node, FDT_PROP_MEM_RANGE);
+	ret = fdt_delprop(fdt, chosen_node, "linux,usable-memory-range");
 	if (ret && ret != -FDT_ERR_NOTFOUND)
 		goto out;
 
@@ -347,12 +339,12 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
 
 	/* add initrd-* */
 	if (initrd_load_addr) {
-		ret = fdt_setprop_u64(fdt, chosen_node, FDT_PROP_INITRD_START,
+		ret = fdt_setprop_u64(fdt, chosen_node, "linux,initrd-start",
 				      initrd_load_addr);
 		if (ret)
 			goto out;
 
-		ret = fdt_setprop_u64(fdt, chosen_node, FDT_PROP_INITRD_END,
+		ret = fdt_setprop_u64(fdt, chosen_node, "linux,initrd-end",
 				      initrd_load_addr + initrd_len);
 		if (ret)
 			goto out;
@@ -362,11 +354,11 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
 			goto out;
 
 	} else {
-		ret = fdt_delprop(fdt, chosen_node, FDT_PROP_INITRD_START);
+		ret = fdt_delprop(fdt, chosen_node, "linux,initrd-start");
 		if (ret && (ret != -FDT_ERR_NOTFOUND))
 			goto out;
 
-		ret = fdt_delprop(fdt, chosen_node, FDT_PROP_INITRD_END);
+		ret = fdt_delprop(fdt, chosen_node, "linux,initrd-end");
 		if (ret && (ret != -FDT_ERR_NOTFOUND))
 			goto out;
 	}
@@ -374,8 +366,7 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
 	if (image->type == KEXEC_TYPE_CRASH) {
 		/* add linux,elfcorehdr */
 		ret = fdt_appendprop_addrrange(fdt, 0, chosen_node,
-				FDT_PROP_KEXEC_ELFHDR,
-				image->elf_load_addr,
+				"linux,elfcorehdr", image->elf_load_addr,
 				image->elf_headers_sz);
 		if (ret)
 			goto out;
@@ -391,8 +382,7 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
 
 		/* add linux,usable-memory-range */
 		ret = fdt_appendprop_addrrange(fdt, 0, chosen_node,
-				FDT_PROP_MEM_RANGE,
-				crashk_res.start,
+				"linux,usable-memory-range", crashk_res.start,
 				crashk_res.end - crashk_res.start + 1);
 		if (ret)
 			goto out;
@@ -400,17 +390,17 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
 
 	/* add bootargs */
 	if (cmdline) {
-		ret = fdt_setprop_string(fdt, chosen_node, FDT_PROP_BOOTARGS, cmdline);
+		ret = fdt_setprop_string(fdt, chosen_node, "bootargs", cmdline);
 		if (ret)
 			goto out;
 	} else {
-		ret = fdt_delprop(fdt, chosen_node, FDT_PROP_BOOTARGS);
+		ret = fdt_delprop(fdt, chosen_node, "bootargs");
 		if (ret && (ret != -FDT_ERR_NOTFOUND))
 			goto out;
 	}
 
 	/* add kaslr-seed */
-	ret = fdt_delprop(fdt, chosen_node, FDT_PROP_KASLR_SEED);
+	ret = fdt_delprop(fdt, chosen_node, "kaslr-seed");
 	if (ret == -FDT_ERR_NOTFOUND)
 		ret = 0;
 	else if (ret)
@@ -419,26 +409,26 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
 	if (rng_is_initialized()) {
 		u64 seed = get_random_u64();
 
-		ret = fdt_setprop_u64(fdt, chosen_node, FDT_PROP_KASLR_SEED, seed);
+		ret = fdt_setprop_u64(fdt, chosen_node, "kaslr-seed", seed);
 		if (ret)
 			goto out;
 	} else {
 		pr_notice("RNG is not initialised: omitting \"%s\" property\n",
-				FDT_PROP_KASLR_SEED);
+			  "kaslr-seed");
 	}
 
 	/* add rng-seed */
 	if (rng_is_initialized()) {
 		void *rng_seed;
 
-		ret = fdt_setprop_placeholder(fdt, chosen_node, FDT_PROP_RNG_SEED,
+		ret = fdt_setprop_placeholder(fdt, chosen_node, "rng-seed",
 				RNG_SEED_SIZE, &rng_seed);
 		if (ret)
 			goto out;
 		get_random_bytes(rng_seed, RNG_SEED_SIZE);
 	} else {
 		pr_notice("RNG is not initialised: omitting \"%s\" property\n",
-				FDT_PROP_RNG_SEED);
+			  "rng-seed");
 	}
 
 	ret = fdt_setprop(fdt, chosen_node, "linux,booted-from-kexec", NULL, 0);
diff --git a/drivers/of/kobj.c b/drivers/of/kobj.c
index a32e60b024b8..6675b5e56960 100644
--- a/drivers/of/kobj.c
+++ b/drivers/of/kobj.c
@@ -119,7 +119,7 @@ int __of_attach_node_sysfs(struct device_node *np)
 	struct property *pp;
 	int rc;
 
-	if (!of_kset)
+	if (!IS_ENABLED(CONFIG_SYSFS) || !of_kset)
 		return 0;
 
 	np->kobj.kset = of_kset;
diff --git a/drivers/of/property.c b/drivers/of/property.c
index 6c028632f425..0c0dc2e369c0 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -1287,6 +1287,11 @@ DEFINE_SIMPLE_PROP(pinctrl6, "pinctrl-6", NULL)
 DEFINE_SIMPLE_PROP(pinctrl7, "pinctrl-7", NULL)
 DEFINE_SIMPLE_PROP(pinctrl8, "pinctrl-8", NULL)
 DEFINE_SIMPLE_PROP(remote_endpoint, "remote-endpoint", NULL)
+DEFINE_SIMPLE_PROP(pwms, "pwms", "#pwm-cells")
+DEFINE_SIMPLE_PROP(resets, "resets", "#reset-cells")
+DEFINE_SIMPLE_PROP(leds, "leds", NULL)
+DEFINE_SIMPLE_PROP(backlight, "backlight", NULL)
+DEFINE_SIMPLE_PROP(phy_handle, "phy-handle", NULL)
 DEFINE_SUFFIX_PROP(regulators, "-supply", NULL)
 DEFINE_SUFFIX_PROP(gpio, "-gpio", "#gpio-cells")
 
@@ -1371,6 +1376,11 @@ static const struct supplier_bindings of_supplier_bindings[] = {
 	{ .parse_prop = parse_pinctrl7, },
 	{ .parse_prop = parse_pinctrl8, },
 	{ .parse_prop = parse_remote_endpoint, .node_not_dev = true, },
+	{ .parse_prop = parse_pwms, },
+	{ .parse_prop = parse_resets, },
+	{ .parse_prop = parse_leds, },
+	{ .parse_prop = parse_backlight, },
+	{ .parse_prop = parse_phy_handle, },
 	{ .parse_prop = parse_gpio_compat, },
 	{ .parse_prop = parse_interrupts, },
 	{ .parse_prop = parse_regulators, },