What: /sys/firmware/devicetree/*
Date: November 2013
-Contact: Grant Likely <grant.likely@linaro.org>
+Contact: Grant Likely <grant.likely@arm.com>, devicetree@vger.kernel.org
Description:
When using OpenFirmware or a Flattened Device Tree to enumerate
hardware, the device tree structure will be exposed in this
name plus address). Properties are represented as files
in the directory. The contents of each file is the exact
binary data from the device tree.
+
+What: /sys/firmware/fdt
+Date: February 2015
+KernelVersion: 3.19
+Contact: Frank Rowand <frowand.list@gmail.com>, devicetree@vger.kernel.org
+Description:
+ Exports the FDT blob that was passed to the kernel by
+ the bootloader. This allows userland applications such
+ as kexec to access the raw binary. This blob is also
+ useful when debugging since it contains any changes
+ made to the blob by the bootloader.
+
+ The fact that this node does not reside under
+ /sys/firmware/device-tree is deliberate: FDT is also used
+ on arm64 UEFI/ACPI systems to communicate just the UEFI
+ and ACPI entry points, but the FDT is never unflattened
+ and used to configure the system.
+
+ A CRC32 checksum is calculated over the entire FDT
+ blob, and verified at late_initcall time. The sysfs
+ entry is instantiated only if the checksum is valid,
+ i.e., if the FDT blob has not been modified in the mean
+ time. Otherwise, a warning is printed.
+Users: kexec, debugging
space and multiple sets of interface control registers, one per slave
interface.
-Bindings for the CCI node follow the ePAPR standard, available from:
-
-www.power.org/documentation/epapr-version-1-1/
-
-with the addition of the bindings described in this document which are
-specific to ARM.
-
* CCI interconnect node
Description: Describes a CCI cache coherent Interconnect component
as a tuple of cells, containing child address,
parent address and the size of the region in the
child address space.
- Definition: A standard property. Follow rules in the ePAPR for
- hierarchical bus addressing. CCI interfaces
- addresses refer to the parent node addressing
- scheme to declare their register bases.
+ Definition: A standard property. Follow rules in the Devicetree
+ Specification for hierarchical bus addressing. CCI
+ interfaces addresses refer to the parent node
+ addressing scheme to declare their register bases.
CCI interconnect node can define the following child nodes:
the "cpus" node, which in turn contains a number of subnodes (ie "cpu")
defining properties for every cpu.
-Bindings for CPU nodes follow the ePAPR v1.1 standard, available from:
+Bindings for CPU nodes follow the Devicetree Specification, available from:
-https://www.power.org/documentation/epapr-version-1-1/
+https://www.devicetree.org/specifications/
with updates for 32-bit and 64-bit ARM systems provided in this document.
Convention used in this document
================================
-This document follows the conventions described in the ePAPR v1.1, with
-the addition:
+This document follows the conventions described in the Devicetree
+Specification, with the addition:
- square brackets define bitfields, eg reg[7:0] value of the bitfield in
the reg property contained in bits 7 down to 0
cpus and cpu node bindings definition
=====================================
-The ARM architecture, in accordance with the ePAPR, requires the cpus and cpu
-nodes to be present and contain the properties described below.
+The ARM architecture, in accordance with the Devicetree Specification,
+requires the cpus and cpu nodes to be present and contain the properties
+described below.
- cpus node
[4] ARM Architecture Reference Manuals
http://infocenter.arm.com/help/index.jsp
-[5] ePAPR standard
- https://www.power.org/documentation/epapr-version-1-1/
+[5] Devicetree Specification
+ https://www.devicetree.org/specifications/
PL310 and variants) based level 2 cache controller. All these various implementations
of the L2 cache controller have compatible programming models (Note 1).
Some of the properties that are just prefixed "cache-*" are taken from section
-3.7.3 of the ePAPR v1.1 specification which can be found at:
-https://www.power.org/wp-content/uploads/2012/06/Power_ePAPR_APPROVED_v1.1.pdf
+3.7.3 of the Devicetree Specification which can be found at:
+https://www.devicetree.org/specifications/
The ARM L2 cache representation in the device tree should be done as follows:
tree nodes.
The remainder of this document provides the topology bindings for ARM, based
-on the ePAPR standard, available from:
+on the Devicetree Specification, available from:
-http://www.power.org/documentation/epapr-version-1-1/
+https://www.devicetree.org/specifications/
If not stated otherwise, whenever a reference to a cpu node phandle is made its
value must point to a cpu node compliant with the cpu node bindings as
to function.
While "simple-pm-bus" follows the "simple-bus" set of properties, as specified
-in ePAPR, it is not an extension of "simple-bus".
+in the Devicetree Specification, it is not an extension of "simple-bus".
Required properties:
--------------------
Device trees may specify the device to be used for boot console output
-with a stdout-path property under /chosen, as described in ePAPR, e.g.
+with a stdout-path property under /chosen, as described in the Devicetree
+Specification, e.g.
/ {
chosen {
Common properties
-The ePAPR specification does not define any properties related to hardware
+The Devicetree Specification does not define any properties related to hardware
byteswapping, but endianness issues show up frequently in porting Linux to
different machine types. This document attempts to provide a consistent
way of handling byteswapping across drivers.
Definition: A list of clock name strings in the same order as the
clocks property.
- Note: All other standard properties (see the ePAPR) are allowed
- but are optional.
+ Note: All other standard properties (see the Devicetree Specification)
+ are allowed but are optional.
EXAMPLE
triplet that includes the child address, parent address, &
length.
- Note: All other standard properties (see the ePAPR) are allowed
- but are optional.
+ Note: All other standard properties (see the Devicetree Specification)
+ are allowed but are optional.
EXAMPLE
crypto@a0000 {
The parameters are defined as:
+----------+-------------------------------------+----------+-------+
- | | ↑ | | |
+ | | ^ | | |
| | |vback_porch | | |
- | | ↓ | | |
+ | | v | | |
+----------#######################################----------+-------+
- | # ↑ # | |
+ | # ^ # | |
| # | # | |
| hback # | # hfront | hsync |
| porch # | hactive # porch | len |
| # | # | |
| # |vactive # | |
| # | # | |
- | # ↓ # | |
+ | # v # | |
+----------#######################################----------+-------+
- | | ↑ | | |
+ | | ^ | | |
| | |vfront_porch | | |
- | | ↓ | | |
+ | | v | | |
+----------+-------------------------------------+----------+-------+
- | | ↑ | | |
+ | | ^ | | |
| | |vsync_len | | |
- | | ↓ | | |
+ | | v | | |
+----------+-------------------------------------+----------+-------+
Example:
If more than one port is present in a device node or there is more than one
endpoint at a port, or a port node needs to be associated with a selected
hardware interface, a common scheme using '#address-cells', '#size-cells'
-and 'reg' properties is used number the nodes.
+and 'reg' properties is used to number the nodes.
device {
...
Each endpoint should contain a 'remote-endpoint' phandle property that points
to the corresponding endpoint in the port of the remote device. In turn, the
-remote endpoint should contain a 'remote-endpoint' property. If it has one,
-it must not point to another than the local endpoint. Two endpoints with their
-'remote-endpoint' phandles pointing at each other form a link between the
+remote endpoint should contain a 'remote-endpoint' property. If it has one, it
+must not point to anything other than the local endpoint. Two endpoints with
+their 'remote-endpoint' phandles pointing at each other form a link between the
containing ports.
device-1 {
};
};
-
Required properties
-------------------
If there is more than one 'port' or more than one 'endpoint' node or 'reg'
-property is present in port and/or endpoint nodes the following properties
-are required in a relevant parent node:
+property present in the port and/or endpoint nodes then the following
+properties are required in a relevant parent node:
- #address-cells : number of cells required to define port/endpoint
identifier, should be 1.
Required properties:
- compatible: must be "ams,as3935"
- reg: SPI chip select number for the device
+ - spi-max-frequency: specifies maximum SPI clock frequency
- spi-cpha: SPI Mode 1. Refer to spi/spi-bus.txt for generic SPI
slave node bindings.
- interrupt-parent : should be the phandle for the interrupt controller
as3935@0 {
compatible = "ams,as3935";
reg = <0>;
+ spi-max-frequency = <400000>;
spi-cpha;
interrupt-parent = <&gpio1>;
interrupts = <16 1>;
* References
-[1] Power.org (TM) Standard for Embedded Power Architecture (TM) Platform
- Requirements (ePAPR), Version 1.0, July 2008.
- (http://www.power.org/resources/downloads/Power_ePAPR_APPROVED_v1.0.pdf)
+[1] Devicetree Specification
+ (https://www.devicetree.org/specifications/)
property;
- max-speed: number, specifies maximum speed in Mbit/s supported by the device;
- max-frame-size: number, maximum transfer unit (IEEE defined MTU), rather than
- the maximum frame size (there's contradiction in ePAPR).
+ the maximum frame size (there's contradiction in the Devicetree
+ Specification).
- phy-mode: string, operation mode of the PHY interface. This is now a de-facto
standard property; supported values are:
* "mii"
* "2000base-x",
* "2500base-x",
* "rxaui"
-- phy-connection-type: the same as "phy-mode" property but described in ePAPR;
+- phy-connection-type: the same as "phy-mode" property but described in the
+ Devicetree Specification;
- phy-handle: phandle, specifies a reference to a node representing a PHY
- device; this property is described in ePAPR and so preferred;
+ device; this property is described in the Devicetree Specification and so
+ preferred;
- phy: the same as "phy-handle" property, not recommended for new bindings.
- phy-device: the same as "phy-handle" property, not recommended for new
bindings.
non-removable;
status = "okay";
- brcmf: bcrmf@1 {
+ brcmf: wifi@1 {
reg = <1>;
compatible = "brcm,bcm4329-fmac";
interrupt-parent = <&pio>;
Copyright 2013 Freescale Semiconductor Inc.
Power Architecture CPUs in Freescale SOCs are represented in device trees as
-per the definition in ePAPR.
+per the definition in the Devicetree Specification.
-In addition to the ePAPR definitions, the properties defined below may be
-present on CPU nodes.
+In addition to the the Devicetree Specification definitions, the properties
+defined below may be present on CPU nodes.
PROPERTIES
Freescale L2 Cache Controller
L2 cache is present in Freescale's QorIQ and QorIQ Qonverge platforms.
-The cache bindings explained below are ePAPR compliant
+The cache bindings explained below are Devicetree Specification compliant
Required Properties:
A single IRQ that handles port-write conditions is
specified by this property. (Typically shared with error).
- Note: All other standard properties (see the ePAPR) are allowed
- but are optional.
+ Note: All other standard properties (see the Devicetree Specification)
+ are allowed but are optional.
Example:
rmu: rmu@d3000 {
represents the LIODN associated with maintenance transactions
for the port.
-Note: All other standard properties (see ePAPR) are allowed but are optional.
+Note: All other standard properties (see the Devicetree Specification)
+are allowed but are optional.
Example:
parent's address space
- clocks: Clock IDs array as required by the controller.
- clock-names: names of clocks correseponding to IDs in the clock property
+ - vdd10-supply: 1.0V powr supply
+ - vdd33-supply: 3.0V/3.3V power supply
Sub-nodes:
The dwc3 core should be added as subnode to Exynos dwc3 glue.
#address-cells = <1>;
#size-cells = <1>;
ranges;
+ vdd10-supply = <&ldo11_reg>;
+ vdd33-supply = <&ldo9_reg>;
dwc3 {
compatible = "synopsys,dwc3";
avic Shanghai AVIC Optoelectronics Co., Ltd.
axentia Axentia Technologies AB
axis Axis Communications AB
+bananapi BIPAI KEJI LIMITED
boe BOE Technology Group Co., Ltd.
bosch Bosch Sensortec GmbH
boundary Boundary Devices Inc.
isee ISEE 2007 S.L.
isil Intersil
issi Integrated Silicon Solutions Inc.
+itead ITEAD Intelligent Systems Co.Ltd
+iwave iWave Systems Technologies Pvt. Ltd.
jdi Japan Display Inc.
jedec JEDEC Solid State Technology Association
karo Ka-Ro electronics GmbH
lg LG Corporation
licheepi Lichee Pi
linaro Linaro Limited
+linksys Belkin International, Inc. (Linksys)
linux Linux-specific binding
lltc Linear Technology Corporation
lsi LSI Corp. (LSI Logic)
richtek Richtek Technology Corporation
ricoh Ricoh Co. Ltd.
rikomagic Rikomagic Tech Corp. Ltd
+riscv RISC-V Foundation
rockchip Fuzhou Rockchip Electronics Co., Ltd
rohm ROHM Semiconductor Co., Ltd
+roofull Shenzhen Roofull Technology Co, Ltd
samsung Samsung Semiconductor
samtec Samtec/Softing company
sandisk Sandisk Corporation
from DMA operations originating from the bus. It provides a means of
defining a mapping or translation between the physical address space of
the bus and the physical address space of the parent of the bus.
- (for more information see ePAPR specification)
+ (for more information see the Devicetree Specification)
* DMA Bus child
Optional property:
This document describes the implementation of the in-kernel
device tree overlay functionality residing in drivers/of/overlay.c and is a
-companion document to Documentation/devicetree/dt-object-internal.txt[1] &
-Documentation/devicetree/dynamic-resolution-notes.txt[2]
+companion document to Documentation/devicetree/dynamic-resolution-notes.txt[1]
How overlays work
-----------------
in an active device should have it created while if the device node is either
disabled or removed all together, the affected device should be deregistered.
-Lets take an example where we have a foo board with the following base tree
-which is taken from [1].
+Lets take an example where we have a foo board with the following base tree:
---- foo.dts -----------------------------------------------------------------
/* FOO platform */
};
---- foo.dts -----------------------------------------------------------------
-The overlay bar.dts, when loaded (and resolved as described in [2]) should
+The overlay bar.dts, when loaded (and resolved as described in [1]) should
---- bar.dts -----------------------------------------------------------------
/plugin/; /* allow undefined label references and record them */
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
-"simple-bus" is defined in the ePAPR 1.0 specification as a property
+"simple-bus" is defined in the Devicetree Specification as a property
meaning a simple memory mapped bus, so the of_platform_populate() code
could be written to just assume simple-bus compatible nodes will
always be traversed. However, we pass it in as an argument so that
Passed by reference.
+kobjects:
+ %pO
+
+ Base specifier for kobject based structs. Must be followed with
+ character for specific type of kobject as listed below:
+
+ Device tree nodes:
+
+ %pOF[fnpPcCF]
+
+ For printing device tree nodes. The optional arguments are:
+ 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
+ Without any arguments prints full_name (same as %pOFf)
+ The separator when using multiple arguments is ':'
+
+ Examples:
+
+ %pOF /foo/bar@0 - Node full name
+ %pOFf /foo/bar@0 - Same as above
+ %pOFfp /foo/bar@0:10 - Node full name + phandle
+ %pOFfcF /foo/bar@0:foo,device:--P- - Node full name +
+ major compatible string +
+ node flags
+ D - dynamic
+ d - detached
+ P - Populated
+ B - Populated bus
+
+ Passed by reference.
+
struct clk:
%pC pll1
00..1F -> 00 -> 00 -> 00
The default location of IO peripherals is above 0xf0000000. This may be changed
-using a "ranges" property in a device tree simple-bus node. See ePAPR 1.1, §6.5
-for details on the syntax and semantic of simple-bus nodes. The following
-limitations apply:
+using a "ranges" property in a device tree simple-bus node. See the Devicetree
+Specification, section 4.5 for details on the syntax and semantics of
+simple-bus nodes. The following limitations apply:
1. Only top level simple-bus nodes are considered
F: drivers/of/
F: include/linux/of*.h
F: scripts/dtc/
+F: Documentation/ABI/testing/sysfs-firmware-ofw
OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS
M: Rob Herring <robh+dt@kernel.org>
*
* Note that if your address is a PIO address, the conversion will fail if
* the physical address can't be internally converted to an IO token with
- * pci_address_to_pio(), that is because it's either called to early or it
+ * pci_address_to_pio(), that is because it's either called too early or it
* can't be matched to any host bridge IO space
*/
int of_address_to_resource(struct device_node *dev, int index,
sysfs_bin_attr_init(&pp->attr);
pp->attr.attr.name = safe_name(&np->kobj, pp->name);
- pp->attr.attr.mode = secure ? S_IRUSR : S_IRUGO;
+ pp->attr.attr.mode = secure ? 0400 : 0444;
pp->attr.size = secure ? 0 : pp->length;
pp->attr.read = of_node_property_read;
return NULL;
__for_each_child_of_node(parent, child) {
- const char *name = strrchr(child->full_name, '/');
- if (WARN(!name, "malformed device_node %s\n", child->full_name))
- continue;
- name++;
+ const char *name = kbasename(child->full_name);
if (strncmp(path, name, len) == 0 && (strlen(name) == len))
return child;
}
return NULL;
}
+struct device_node *__of_find_node_by_full_path(struct device_node *node,
+ const char *path)
+{
+ const char *separator = strchr(path, ':');
+
+ while (node && *path == '/') {
+ struct device_node *tmp = node;
+
+ path++; /* Increment past '/' delimiter */
+ node = __of_find_node_by_path(node, path);
+ of_node_put(tmp);
+ path = strchrnul(path, '/');
+ if (separator && separator < path)
+ break;
+ }
+ return node;
+}
+
/**
* of_find_node_opts_by_path - Find a node matching a full OF path
* @path: Either the full path to match, or if the path does not
raw_spin_lock_irqsave(&devtree_lock, flags);
if (!np)
np = of_node_get(of_root);
- while (np && *path == '/') {
- struct device_node *tmp = np;
-
- path++; /* Increment past '/' delimiter */
- np = __of_find_node_by_path(np, path);
- of_node_put(tmp);
- path = strchrnul(path, '/');
- if (separator && separator < path)
- break;
- }
+ np = __of_find_node_by_full_path(np, path);
raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
return of_reconfig_notify(action, &pr);
}
-void __of_attach_node(struct device_node *np)
+static void __of_attach_node(struct device_node *np)
{
const __be32 *phandle;
int sz;
* On match, returns a non-zero value with smaller values returned for more
* specific compatible values.
*/
-int of_fdt_is_compatible(const void *blob,
+static int of_fdt_is_compatible(const void *blob,
unsigned long node, const char *compat)
{
const char *cp;
}
/**
- * early_init_dt_scan_memory - Look for an parse memory nodes
+ * early_init_dt_scan_memory - Look for and parse memory nodes
*/
int __init early_init_dt_scan_memory(unsigned long node, const char *uname,
int depth, void *data)
*/
int of_irq_to_resource(struct device_node *dev, int index, struct resource *r)
{
- int irq = irq_of_parse_and_map(dev, index);
+ int irq = of_irq_get(dev, index);
+
+ if (irq < 0)
+ return irq;
/* Only dereference the resource if both the
* resource and the irq are valid. */
struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags);
__printf(2, 3) struct device_node *__of_node_dup(const struct device_node *np, const char *fmt, ...);
+struct device_node *__of_find_node_by_full_path(struct device_node *node,
+ const char *path);
+
extern const void *__of_get_property(const struct device_node *np,
const char *name, int *lenp);
extern int __of_add_property(struct device_node *np, struct property *prop);
extern void __of_update_property_sysfs(struct device_node *np,
struct property *newprop, struct property *oldprop);
-extern void __of_attach_node(struct device_node *np);
extern int __of_attach_node_sysfs(struct device_node *np);
extern void __of_detach_node(struct device_node *np);
extern void __of_detach_node_sysfs(struct device_node *np);
/* NOTE: Multiple mods of created nodes not supported */
tchild = of_get_child_by_name(target, cname);
if (tchild != NULL) {
+ /* new overlay phandle value conflicts with existing value */
+ if (child->phandle)
+ return -EINVAL;
+
/* apply overlay recursively */
ret = of_overlay_apply_one(ov, tchild, child);
of_node_put(tchild);
/* format arguments only used if dev_name() resolves to NULL */
dev_set_name(dev, dev_name(dev) ? "%s:%s" : "%s",
- strrchr(node->full_name, '/') + 1, dev_name(dev));
+ kbasename(node->full_name), dev_name(dev));
node = node->parent;
}
}
#include <linux/errno.h>
#include <linux/slab.h>
+#include "of_private.h"
+
/* illegal phandle value (set when unresolved) */
#define OF_PHANDLE_ILLEGAL 0xdeadbeef
-/**
- * Find a node with the give full name by recursively following any of
- * the child node links.
- */
-static struct device_node *find_node_by_full_name(struct device_node *node,
- const char *full_name)
-{
- struct device_node *child, *found;
-
- if (!node)
- return NULL;
-
- if (!of_node_cmp(node->full_name, full_name))
- return of_node_get(node);
-
- for_each_child_of_node(node, child) {
- found = find_node_by_full_name(child, full_name);
- if (found != NULL) {
- of_node_put(child);
- return found;
- }
- }
-
- return NULL;
-}
-
static phandle live_tree_max_phandle(void)
{
struct device_node *node;
if (err)
goto err_fail;
- refnode = find_node_by_full_name(overlay, node_path);
+ refnode = __of_find_node_by_full_path(of_node_get(overlay), node_path);
if (!refnode)
continue;
static int node_name_cmp(const struct device_node *dn1,
const struct device_node *dn2)
{
- const char *n1 = strrchr(dn1->full_name, '/') ? : "/";
- const char *n2 = strrchr(dn2->full_name, '/') ? : "/";
+ const char *n1 = kbasename(dn1->full_name);
+ const char *n2 = kbasename(dn2->full_name);
return of_node_cmp(n1, n2);
}
#size-cells = <0>;
dev@100 {
- compatible = "test-sub-device";
+ compatible = "test-sub-device",
+ "test-compat2",
+ "test-compat3";
reg = <0x100>;
};
};
pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
}
+static void __init of_unittest_printf_one(struct device_node *np, const char *fmt,
+ const char *expected)
+{
+ unsigned char buf[strlen(expected)+10];
+ int size, i;
+
+ /* Baseline; check conversion with a large size limit */
+ memset(buf, 0xff, sizeof(buf));
+ size = snprintf(buf, sizeof(buf) - 2, fmt, np);
+
+ /* use strcmp() instead of strncmp() here to be absolutely sure strings match */
+ unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff),
+ "sprintf failed; fmt='%s' expected='%s' rslt='%s'\n",
+ fmt, expected, buf);
+
+ /* Make sure length limits work */
+ size++;
+ for (i = 0; i < 2; i++, size--) {
+ /* Clear the buffer, and make sure it works correctly still */
+ memset(buf, 0xff, sizeof(buf));
+ snprintf(buf, size+1, fmt, np);
+ unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff),
+ "snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n",
+ size, fmt, expected, buf);
+ }
+}
+
+static void __init of_unittest_printf(void)
+{
+ struct device_node *np;
+ const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100";
+ char phandle_str[16] = "";
+
+ np = of_find_node_by_path(full_name);
+ if (!np) {
+ unittest(np, "testcase data missing\n");
+ return;
+ }
+
+ num_to_str(phandle_str, sizeof(phandle_str), np->phandle);
+
+ of_unittest_printf_one(np, "%pOF", full_name);
+ of_unittest_printf_one(np, "%pOFf", full_name);
+ of_unittest_printf_one(np, "%pOFp", phandle_str);
+ of_unittest_printf_one(np, "%pOFP", "dev@100");
+ of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC");
+ of_unittest_printf_one(np, "%10pOFP", " dev@100");
+ of_unittest_printf_one(np, "%-10pOFP", "dev@100 ");
+ of_unittest_printf_one(of_root, "%pOFP", "/");
+ of_unittest_printf_one(np, "%pOFF", "----");
+ of_unittest_printf_one(np, "%pOFPF", "dev@100:----");
+ of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device");
+ of_unittest_printf_one(np, "%pOFc", "test-sub-device");
+ of_unittest_printf_one(np, "%pOFC",
+ "\"test-sub-device\",\"test-compat2\",\"test-compat3\"");
+}
+
struct node_hash {
struct hlist_node node;
struct device_node *np;
of_unittest_find_node_by_name();
of_unittest_dynamic();
of_unittest_parse_phandle_with_args();
+ of_unittest_printf();
of_unittest_property_string();
of_unittest_property_copy();
of_unittest_changeset();
return 0;
}
+static inline int of_device_compatible_match(struct device_node *device,
+ const char *const *compat)
+{
+ return 0;
+}
+
static inline bool of_device_is_available(const struct device_node *device)
{
return false;
unsigned long node,
const char *name,
int *size);
-extern int of_fdt_is_compatible(const void *blob,
- unsigned long node,
- const char *compat);
extern bool of_fdt_is_big_endian(const void *blob,
unsigned long node);
extern int of_fdt_match(const void *blob, unsigned long node,
#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>
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;
/*
* 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 **
*
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) {
for (my $count = $linenr; $count <= $lc; $count++) {
my $fmt = get_quoted_string($lines[$count - 1], raw_line($count, 0));
$fmt =~ s/%%//g;
- if ($fmt =~ /(\%[\*\d\.]*p(?![\WFfSsBKRraEhMmIiUDdgVCbGN]).)/) {
+ if ($fmt =~ /(\%[\*\d\.]*p(?![\WFfSsBKRraEhMmIiUDdgVCbGNO]).)/) {
$bad_extension = $1;
last;
}
if (( ${cmd_diff} )) ; then
- diff ${diff_flags} \
+ diff ${diff_flags} --label "${dtx_file_1}" --label "${dtx_file_2}" \
<(compile_to_dts "${dtx_file_1}") \
<(compile_to_dts "${dtx_file_2}")
projects / karo-tx-linux.git / commitdiff