Merge tag 'devicetree-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull DeviceTree updates from Rob Herring:

 - vsprintf format specifier %pOF for device_node's. This will enable us
   to stop storing the full node names. Conversion of users will happen
   next cycle.

 - Update documentation to point to DT specification instead of ePAPR.

 - Split out graph and property functions to a separate file.

 - New of-graph functions for ALSA

 - Add vendor prefixes for RISC-V, Linksys, iWave Systems, Roofull,
   Itead, and BananaPi.

 - Improve dtx_diff utility filename printing.

* tag 'devicetree-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (32 commits)
  of: document /sys/firmware/fdt
  dt-bindings: Add RISC-V vendor prefix
  vsprintf: Add %p extension "%pOF" for device tree
  of: find_node_by_full_name rewrite to compare each level
  of: use kbasename instead of open coding
  dt-bindings: thermal: add file extension to brcm,ns-thermal
  of: update ePAPR references to point to Devicetree Specification
  scripts/dtc: dtx_diff - Show real file names in diff header
  of: detect invalid phandle in overlay
  of: be consistent in form of file mode
  of: make __of_attach_node() static
  of: address.c header comment typo
  of: fdt.c header comment typo
  of: make of_fdt_is_compatible() static
  dt-bindings: display-timing.txt convert non-ascii characters to ascii
  Documentation: remove overlay-notes reference to non-existent file
  dt-bindings: usb: exynos-usb: Add missing required VDD properties
  dt-bindings: Add vendor prefix for Linksys
  MAINTAINERS: add device tree ABI documentation file
  of: Add vendor prefix for iWave Systems Technologies Pvt. Ltd
  ...

1 files changed, 136 insertions, 0 deletions

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 9f37d6208e99..86c3385b9eb3 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -31,6 +31,7 @@
 #include <linux/dcache.h>
 #include <linux/cred.h>
 #include <linux/uuid.h>
+#include <linux/of.h>
 #include <net/addrconf.h>
 #ifdef CONFIG_BLOCK
 #include <linux/blkdev.h>
@@ -1470,6 +1471,126 @@ char *flags_string(char *buf, char *end, void *flags_ptr, const char *fmt)
 	return format_flags(buf, end, flags, names);
 }
 
+static const char *device_node_name_for_depth(const struct device_node *np, int depth)
+{
+	for ( ; np && depth; depth--)
+		np = np->parent;
+
+	return kbasename(np->full_name);
+}
+
+static noinline_for_stack
+char *device_node_gen_full_name(const struct device_node *np, char *buf, char *end)
+{
+	int depth;
+	const struct device_node *parent = np->parent;
+	static const struct printf_spec strspec = {
+		.field_width = -1,
+		.precision = -1,
+	};
+
+	/* special case for root node */
+	if (!parent)
+		return string(buf, end, "/", strspec);
+
+	for (depth = 0; parent->parent; depth++)
+		parent = parent->parent;
+
+	for ( ; depth >= 0; depth--) {
+		buf = string(buf, end, "/", strspec);
+		buf = string(buf, end, device_node_name_for_depth(np, depth),
+			     strspec);
+	}
+	return buf;
+}
+
+static noinline_for_stack
+char *device_node_string(char *buf, char *end, struct device_node *dn,
+			 struct printf_spec spec, const char *fmt)
+{
+	char tbuf[sizeof("xxxx") + 1];
+	const char *p;
+	int ret;
+	char *buf_start = buf;
+	struct property *prop;
+	bool has_mult, pass;
+	static const struct printf_spec num_spec = {
+		.flags = SMALL,
+		.field_width = -1,
+		.precision = -1,
+		.base = 10,
+	};
+
+	struct printf_spec str_spec = spec;
+	str_spec.field_width = -1;
+
+	if (!IS_ENABLED(CONFIG_OF))
+		return string(buf, end, "(!OF)", spec);
+
+	if ((unsigned long)dn < PAGE_SIZE)
+		return string(buf, end, "(null)", spec);
+
+	/* simple case without anything any more format specifiers */
+	fmt++;
+	if (fmt[0] == '\0' || strcspn(fmt,"fnpPFcC") > 0)
+		fmt = "f";
+
+	for (pass = false; strspn(fmt,"fnpPFcC"); fmt++, pass = true) {
+		if (pass) {
+			if (buf < end)
+				*buf = ':';
+			buf++;
+		}
+
+		switch (*fmt) {
+		case 'f':	/* full_name */
+			buf = device_node_gen_full_name(dn, buf, end);
+			break;
+		case 'n':	/* name */
+			buf = string(buf, end, dn->name, str_spec);
+			break;
+		case 'p':	/* phandle */
+			buf = number(buf, end, (unsigned int)dn->phandle, num_spec);
+			break;
+		case 'P':	/* path-spec */
+			p = kbasename(of_node_full_name(dn));
+			if (!p[1])
+				p = "/";
+			buf = string(buf, end, p, str_spec);
+			break;
+		case 'F':	/* flags */
+			tbuf[0] = of_node_check_flag(dn, OF_DYNAMIC) ? 'D' : '-';
+			tbuf[1] = of_node_check_flag(dn, OF_DETACHED) ? 'd' : '-';
+			tbuf[2] = of_node_check_flag(dn, OF_POPULATED) ? 'P' : '-';
+			tbuf[3] = of_node_check_flag(dn, OF_POPULATED_BUS) ? 'B' : '-';
+			tbuf[4] = 0;
+			buf = string(buf, end, tbuf, str_spec);
+			break;
+		case 'c':	/* major compatible string */
+			ret = of_property_read_string(dn, "compatible", &p);
+			if (!ret)
+				buf = string(buf, end, p, str_spec);
+			break;
+		case 'C':	/* full compatible string */
+			has_mult = false;
+			of_property_for_each_string(dn, "compatible", prop, p) {
+				if (has_mult)
+					buf = string(buf, end, ",", str_spec);
+				buf = string(buf, end, "\"", str_spec);
+				buf = string(buf, end, p, str_spec);
+				buf = string(buf, end, "\"", str_spec);
+
+				has_mult = true;
+			}
+			break;
+		default:
+			break;
+		}
+	}
+
+	return widen_string(buf, buf - buf_start, end, spec);
+}
+
 int kptr_restrict __read_mostly;
 
 /*
@@ -1566,6 +1687,16 @@ int kptr_restrict __read_mostly;
  *       p page flags (see struct page) given as pointer to unsigned long
  *       g gfp flags (GFP_* and __GFP_*) given as pointer to gfp_t
  *       v vma flags (VM_*) given as pointer to unsigned long
+ * - 'O' For a kobject based struct. Must be one of the following:
+ *       - 'OF[fnpPcCF]'  For a device tree object
+ *                        Without any optional arguments prints the full_name
+ *                        f device node full_name
+ *                        n device node name
+ *                        p device node phandle
+ *                        P device node path spec (name + @unit)
+ *                        F device node flags
+ *                        c major compatible string
+ *                        C full compatible string
  *
  * ** Please update also Documentation/printk-formats.txt when making changes **
  *
@@ -1721,6 +1852,11 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr,
 
 	case 'G':
 		return flags_string(buf, end, ptr, fmt);
+	case 'O':
+		switch (fmt[1]) {
+		case 'F':
+			return device_node_string(buf, end, ptr, spec, fmt + 1);
+		}
 	}
 	spec.flags |= SMALL;
 	if (spec.field_width == -1) {