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authorLinus Torvalds <torvalds@linux-foundation.org>2019-11-27 06:45:12 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-11-27 06:45:12 +0300
commit361b0d286afea0d867537536977a695b5557d133 (patch)
treea9a362c2f4b687435fc1b11f411f593f86d0467d /Documentation
parent6e9f879684b46331f51d0c76ebee981c788417db (diff)
parent1afc14032e54a7e6c38304dc9a6bda1b6416f2b7 (diff)
downloadlinux-361b0d286afea0d867537536977a695b5557d133.tar.xz
Merge tag 'devprop-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull device properties framework updates from Rafael Wysocki: "Add support for printing fwnode names using a new conversion specifier "%pfw" (Sakari Ailus), clean up the software node and efi/apple-properties code in preparation for improved software node reference properties handling (Dmitry Torokhov) and fix the struct fwnode_operations description (Heikki Krogerus)" * tag 'devprop-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (22 commits) software node: simplify property_entry_read_string_array() software node: unify PROPERTY_ENTRY_XXX macros software node: remove property_entry_read_uNN_array functions software node: get rid of property_set_pointer() software node: clean up property_copy_string_array() software node: mark internal macros with double underscores efi/apple-properties: use PROPERTY_ENTRY_U8_ARRAY_LEN software node: introduce PROPERTY_ENTRY_XXX_ARRAY_LEN() software node: remove DEV_PROP_MAX device property: Fix the description of struct fwnode_operations lib/test_printf: Add tests for %pfw printk modifier lib/vsprintf: Add %pfw conversion specifier for printing fwnode names lib/vsprintf: OF nodes are first and foremost, struct device_nodes lib/vsprintf: Make use of fwnode API to obtain node names and separators lib/vsprintf: Add a note on re-using %pf or %pF lib/vsprintf: Remove support for %pF and %pf in favour of %pS and %ps device property: Add a function to obtain a node's prefix device property: Add fwnode_get_name for returning the name of a node device property: Add functions for accessing node's parents device property: Move fwnode_get_parent() up ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/core-api/printk-formats.rst34
1 files changed, 24 insertions, 10 deletions
diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst
index 050f34f3a70f..ea21dd4b9bad 100644
--- a/Documentation/core-api/printk-formats.rst
+++ b/Documentation/core-api/printk-formats.rst
@@ -98,8 +98,6 @@ Symbols/Function Pointers
%pS versatile_init+0x0/0x110
%ps versatile_init
- %pF versatile_init+0x0/0x110
- %pf versatile_init
%pSR versatile_init+0x9/0x110
(with __builtin_extract_return_addr() translation)
%pB prev_fn_of_versatile_init+0x88/0x88
@@ -109,14 +107,6 @@ The ``S`` and ``s`` specifiers are used for printing a pointer in symbolic
format. They result in the symbol name with (S) or without (s)
offsets. If KALLSYMS are disabled then the symbol address is printed instead.
-Note, that the ``F`` and ``f`` specifiers are identical to ``S`` (``s``)
-and thus deprecated. We have ``F`` and ``f`` because on ia64, ppc64 and
-parisc64 function pointers are indirect and, in fact, are function
-descriptors, which require additional dereferencing before we can lookup
-the symbol. As of now, ``S`` and ``s`` perform dereferencing on those
-platforms (when needed), so ``F`` and ``f`` exist for compatibility
-reasons only.
-
The ``B`` specifier results in the symbol name with offsets and should be
used when printing stack backtraces. The specifier takes into
consideration the effect of compiler optimisations which may occur
@@ -440,6 +430,30 @@ Examples::
Passed by reference.
+Fwnode handles
+--------------
+
+::
+
+ %pfw[fP]
+
+For printing information on fwnode handles. The default is to print the full
+node name, including the path. The modifiers are functionally equivalent to
+%pOF above.
+
+ - f - full name of the node, including the path
+ - P - the name of the node including an address (if there is one)
+
+Examples (ACPI)::
+
+ %pfwf \_SB.PCI0.CIO2.port@1.endpoint@0 - Full node name
+ %pfwP endpoint@0 - Node name
+
+Examples (OF)::
+
+ %pfwf /ocp@68000000/i2c@48072000/camera@10/port/endpoint - Full name
+ %pfwP endpoint - Node name
+
Time and date (struct rtc_time)
-------------------------------