linux/drivers/of
Dmitry Osipenko 4ec0a44ba8 of_graph: add of_graph_is_present()
In some cases it's very useful to silently check whether port node exists
at all in a device-tree before proceeding with parsing the graph. The DRM
bridges code is one example of such case where absence of a graph in a
device-tree is a legit condition.

This patch adds of_graph_is_present() which returns true if given
device-tree node contains OF graph port.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200701074232.13632-2-digetx@gmail.com
2020-07-01 10:49:02 +02:00
..
unittest-data of: unittest: kmemleak in duplicate property update 2020-04-17 08:31:34 -05:00
address.c of/address: Support multiple 'dma-ranges' entries 2020-02-14 15:27:08 -06:00
base.c ARM: SoC-related driver updates 2020-02-08 14:04:19 -08:00
device.c treewide: remove redundant IS_ERR() before error code check 2020-02-04 03:05:27 +00:00
dynamic.c of: of_detach_node() remove unneeded local return variable 2020-04-14 07:59:54 -05:00
fdt_address.c of: Use SPDX license tag for DT files 2018-01-08 08:22:45 -06:00
fdt.c of/fdt: Remove redundant kbasename function call 2020-05-28 20:57:17 -06:00
irq.c of: irq: fix a trivial typo in a doc comment 2019-08-14 20:12:16 -06:00
Kconfig of: Add OF_DMA_DEFAULT_COHERENT & select it on powerpc 2020-01-28 08:26:20 -06:00
kobj.c of: Fix a refcounting bug in __of_attach_node_sysfs() 2020-05-27 19:30:25 -06:00
Makefile PCI: Move OF-related PCI functions into PCI core 2018-01-17 17:36:39 -06:00
of_mdio.c net: mdio: of: export part of of_mdiobus_register_phy() 2020-04-22 19:41:26 -07:00
of_net.c net: of_get_phy_mode: Change API to solve int/unit warnings 2019-11-04 11:21:25 -08:00
of_numa.c of, numa: Validate some distance map rules 2018-11-08 12:44:34 -06:00
of_private.h of: of_private.h: Replace zero-length array with flexible-array member 2020-03-31 09:03:34 -06:00
of_reserved_mem.c Devicetree updates for v5.8: 2020-06-04 20:11:25 -07:00
overlay.c of: overlay: kmemleak in dup_and_fixup_symbol_prop() 2020-04-17 08:31:34 -05:00
pdt.c of: Remove struct device_node.type pointer 2019-01-10 16:24:44 -06:00
platform.c Driver core patches for 5.8-rc1 2020-06-07 10:53:36 -07:00
property.c of_graph: add of_graph_is_present() 2020-07-01 10:49:02 +02:00
resolver.c of: overlay: log the error cause on resolver failure 2020-03-02 11:32:44 -06:00
unittest.c of: unittest: kmemleak in duplicate property update 2020-04-17 08:31:34 -05:00