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author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-11-26 19:45:12 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-11-26 19:45:12 -0800 |
commit | 361b0d286afea0d867537536977a695b5557d133 (patch) | |
tree | a9a362c2f4b687435fc1b11f411f593f86d0467d /Documentation/core-api | |
parent | 6e9f879684b46331f51d0c76ebee981c788417db (diff) | |
parent | 1afc14032e54a7e6c38304dc9a6bda1b6416f2b7 (diff) | |
download | linux-361b0d286afea0d867537536977a695b5557d133.tar.bz2 |
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/core-api')
-rw-r--r-- | Documentation/core-api/printk-formats.rst | 34 |
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) ------------------------------- |