mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
- Sync dtc to upstream version v1.6.0-51-g183df9e9c2b9 and build host fdtoverlay - Add kbuild support to build DT overlays (%.dtbo) - Drop NULLifying match table in of_match_device(). In preparation for this, there are several driver cleanups to use (of_)?device_get_match_data(). - Drop pointless wrappers from DT struct device API - Convert USB binding schemas to use graph schema and remove old plain text graph binding doc - Convert spi-nor and v3d GPU bindings to DT schema - Tree wide schema fixes for if/then schemas, array size constraints, and undocumented compatible strings in examples - Handle 'no-map' correctly for already reserved memblock regions -----BEGIN PGP SIGNATURE----- iQJEBAABCgAuFiEEktVUI4SxYhzZyEuo+vtdtY28YcMFAmAz1GEQHHJvYmhAa2Vy bmVsLm9yZwAKCRD6+121jbxhw55/D/955O2f5Gjp7bXvdoSucZtks/lqlC/eIAAw An5pjBL+o1urXsvafEMYemwmnwq/U4vy0aJRoAK1+MiI4masb56ET0KN5LsOudki b3M/O16RqGF31+blWyoxseZnZh6KsKzIRoE5XAtbr/QAnpdI0/5BgGoWSWYtDk2v LddL650/BieyvzdnFTLWCMAxd6DW0P9SI+8N3E+XlxAWCYQrLCqVELHbkrxAGCuN CggHIIiNf2K7z4UopVsGjnUwML9YRHXc9wOpF1c4CBrLu9TfDvdQ4OnNcnxcl/Sp E2FTHG0jSVm3VJRBbk4e68uvt3HrJJWsYnMtu2QTweGC/GbeUr9LJ0MIbSwp+rsL FEqCMFWOniq27eJBk6jHckaoBl93AHQlIGdJR/pFAi9Ijt32tUdVG5kqD/Tl+xKm njPcjVjWilr2ssfZ4tUggzPp2fjrau88ZS8qLja31vElzvULeA67KjEtG0RZAtwg ywfATiCaT096pR9v2VYuL/5NNnZFxHx3hWsOH1rcsyPk0BLguU3dkrAn28XBVQFd cOPfR3T/wsT0wHDht2aXPSM0hBiejFmvLhebGuJN9lqG+Pc1f87xiCT3pM7wymtJ iqTMrQ7dUgjQgU91PjatdB17tlnGHe0hh8AiuhQoPgOprpRKszG+rBFJLG3yRnl7 QmLZnQTIhw== =9V4A -----END PGP SIGNATURE----- Merge tag 'devicetree-for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull devicetree updates from Rob Herring: - Sync dtc to upstream version v1.6.0-51-g183df9e9c2b9 and build host fdtoverlay - Add kbuild support to build DT overlays (%.dtbo) - Drop NULLifying match table in of_match_device(). In preparation for this, there are several driver cleanups to use (of_)?device_get_match_data(). - Drop pointless wrappers from DT struct device API - Convert USB binding schemas to use graph schema and remove old plain text graph binding doc - Convert spi-nor and v3d GPU bindings to DT schema - Tree wide schema fixes for if/then schemas, array size constraints, and undocumented compatible strings in examples - Handle 'no-map' correctly for already reserved memblock regions * tag 'devicetree-for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (35 commits) driver core: platform: Drop of_device_node_put() wrapper of: Remove of_dev_{get,put}() dt-bindings: usb: Change descibe to describe in usbmisc-imx.txt dt-bindings: can: rcar_canfd: Group tuples in pin control properties dt-bindings: power: renesas,apmu: Group tuples in cpus properties dt-bindings: mtd: spi-nor: Convert to DT schema format dt-bindings: Use portable sort for version cmp dt-bindings: ethernet-controller: fix fixed-link specification dt-bindings: irqchip: Add node name to PRUSS INTC dt-bindings: interconnect: Fix the expected number of cells dt-bindings: Fix errors in 'if' schemas dt-bindings: iommu: renesas,ipmmu-vmsa: Make 'power-domains' conditionally required dt-bindings: Fix undocumented compatible strings in examples kbuild: Add support to build overlays (%.dtbo) scripts: dtc: Remove the unused fdtdump.c file scripts: dtc: Build fdtoverlay tool scripts/dtc: Update to upstream version v1.6.0-51-g183df9e9c2b9 scripts: dtc: Fetch fdtoverlay.c from external DTC project dt-bindings: thermal: sun8i: Fix misplaced schema keyword in compatible strings dt-bindings: iio: dac: Fix AD5686 references ...
335 lines
8.4 KiB
C
335 lines
8.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/string.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_iommu.h>
|
|
#include <linux/dma-direct.h> /* for bus_dma_region */
|
|
#include <linux/dma-map-ops.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <asm/errno.h>
|
|
#include "of_private.h"
|
|
|
|
/**
|
|
* of_match_device - Tell if a struct device matches an of_device_id list
|
|
* @matches: array of of device match structures to search in
|
|
* @dev: the of device structure to match against
|
|
*
|
|
* Used by a driver to check whether an platform_device present in the
|
|
* system is in its list of supported devices.
|
|
*/
|
|
const struct of_device_id *of_match_device(const struct of_device_id *matches,
|
|
const struct device *dev)
|
|
{
|
|
if ((!matches) || (!dev->of_node))
|
|
return NULL;
|
|
return of_match_node(matches, dev->of_node);
|
|
}
|
|
EXPORT_SYMBOL(of_match_device);
|
|
|
|
int of_device_add(struct platform_device *ofdev)
|
|
{
|
|
BUG_ON(ofdev->dev.of_node == NULL);
|
|
|
|
/* name and id have to be set so that the platform bus doesn't get
|
|
* confused on matching */
|
|
ofdev->name = dev_name(&ofdev->dev);
|
|
ofdev->id = PLATFORM_DEVID_NONE;
|
|
|
|
/*
|
|
* If this device has not binding numa node in devicetree, that is
|
|
* of_node_to_nid returns NUMA_NO_NODE. device_add will assume that this
|
|
* device is on the same node as the parent.
|
|
*/
|
|
set_dev_node(&ofdev->dev, of_node_to_nid(ofdev->dev.of_node));
|
|
|
|
return device_add(&ofdev->dev);
|
|
}
|
|
|
|
/**
|
|
* of_dma_configure - Setup DMA configuration
|
|
* @dev: Device to apply DMA configuration
|
|
* @np: Pointer to OF node having DMA configuration
|
|
* @force_dma: Whether device is to be set up by of_dma_configure() even if
|
|
* DMA capability is not explicitly described by firmware.
|
|
* @id: Optional const pointer value input id
|
|
*
|
|
* Try to get devices's DMA configuration from DT and update it
|
|
* accordingly.
|
|
*
|
|
* If platform code needs to use its own special DMA configuration, it
|
|
* can use a platform bus notifier and handle BUS_NOTIFY_ADD_DEVICE events
|
|
* to fix up DMA configuration.
|
|
*/
|
|
int of_dma_configure_id(struct device *dev, struct device_node *np,
|
|
bool force_dma, const u32 *id)
|
|
{
|
|
const struct iommu_ops *iommu;
|
|
const struct bus_dma_region *map = NULL;
|
|
u64 dma_start = 0;
|
|
u64 mask, end, size = 0;
|
|
bool coherent;
|
|
int ret;
|
|
|
|
ret = of_dma_get_range(np, &map);
|
|
if (ret < 0) {
|
|
/*
|
|
* For legacy reasons, we have to assume some devices need
|
|
* DMA configuration regardless of whether "dma-ranges" is
|
|
* correctly specified or not.
|
|
*/
|
|
if (!force_dma)
|
|
return ret == -ENODEV ? 0 : ret;
|
|
} else {
|
|
const struct bus_dma_region *r = map;
|
|
u64 dma_end = 0;
|
|
|
|
/* Determine the overall bounds of all DMA regions */
|
|
for (dma_start = ~0; r->size; r++) {
|
|
/* Take lower and upper limits */
|
|
if (r->dma_start < dma_start)
|
|
dma_start = r->dma_start;
|
|
if (r->dma_start + r->size > dma_end)
|
|
dma_end = r->dma_start + r->size;
|
|
}
|
|
size = dma_end - dma_start;
|
|
|
|
/*
|
|
* Add a work around to treat the size as mask + 1 in case
|
|
* it is defined in DT as a mask.
|
|
*/
|
|
if (size & 1) {
|
|
dev_warn(dev, "Invalid size 0x%llx for dma-range(s)\n",
|
|
size);
|
|
size = size + 1;
|
|
}
|
|
|
|
if (!size) {
|
|
dev_err(dev, "Adjusted size 0x%llx invalid\n", size);
|
|
kfree(map);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If @dev is expected to be DMA-capable then the bus code that created
|
|
* it should have initialised its dma_mask pointer by this point. For
|
|
* now, we'll continue the legacy behaviour of coercing it to the
|
|
* coherent mask if not, but we'll no longer do so quietly.
|
|
*/
|
|
if (!dev->dma_mask) {
|
|
dev_warn(dev, "DMA mask not set\n");
|
|
dev->dma_mask = &dev->coherent_dma_mask;
|
|
}
|
|
|
|
if (!size && dev->coherent_dma_mask)
|
|
size = max(dev->coherent_dma_mask, dev->coherent_dma_mask + 1);
|
|
else if (!size)
|
|
size = 1ULL << 32;
|
|
|
|
/*
|
|
* Limit coherent and dma mask based on size and default mask
|
|
* set by the driver.
|
|
*/
|
|
end = dma_start + size - 1;
|
|
mask = DMA_BIT_MASK(ilog2(end) + 1);
|
|
dev->coherent_dma_mask &= mask;
|
|
*dev->dma_mask &= mask;
|
|
/* ...but only set bus limit and range map if we found valid dma-ranges earlier */
|
|
if (!ret) {
|
|
dev->bus_dma_limit = end;
|
|
dev->dma_range_map = map;
|
|
}
|
|
|
|
coherent = of_dma_is_coherent(np);
|
|
dev_dbg(dev, "device is%sdma coherent\n",
|
|
coherent ? " " : " not ");
|
|
|
|
iommu = of_iommu_configure(dev, np, id);
|
|
if (PTR_ERR(iommu) == -EPROBE_DEFER) {
|
|
/* Don't touch range map if it wasn't set from a valid dma-ranges */
|
|
if (!ret)
|
|
dev->dma_range_map = NULL;
|
|
kfree(map);
|
|
return -EPROBE_DEFER;
|
|
}
|
|
|
|
dev_dbg(dev, "device is%sbehind an iommu\n",
|
|
iommu ? " " : " not ");
|
|
|
|
arch_setup_dma_ops(dev, dma_start, size, iommu, coherent);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(of_dma_configure_id);
|
|
|
|
int of_device_register(struct platform_device *pdev)
|
|
{
|
|
device_initialize(&pdev->dev);
|
|
return of_device_add(pdev);
|
|
}
|
|
EXPORT_SYMBOL(of_device_register);
|
|
|
|
void of_device_unregister(struct platform_device *ofdev)
|
|
{
|
|
device_unregister(&ofdev->dev);
|
|
}
|
|
EXPORT_SYMBOL(of_device_unregister);
|
|
|
|
const void *of_device_get_match_data(const struct device *dev)
|
|
{
|
|
const struct of_device_id *match;
|
|
|
|
match = of_match_device(dev->driver->of_match_table, dev);
|
|
if (!match)
|
|
return NULL;
|
|
|
|
return match->data;
|
|
}
|
|
EXPORT_SYMBOL(of_device_get_match_data);
|
|
|
|
static ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
|
|
{
|
|
const char *compat;
|
|
char *c;
|
|
struct property *p;
|
|
ssize_t csize;
|
|
ssize_t tsize;
|
|
|
|
if ((!dev) || (!dev->of_node))
|
|
return -ENODEV;
|
|
|
|
/* Name & Type */
|
|
/* %p eats all alphanum characters, so %c must be used here */
|
|
csize = snprintf(str, len, "of:N%pOFn%c%s", dev->of_node, 'T',
|
|
of_node_get_device_type(dev->of_node));
|
|
tsize = csize;
|
|
len -= csize;
|
|
if (str)
|
|
str += csize;
|
|
|
|
of_property_for_each_string(dev->of_node, "compatible", p, compat) {
|
|
csize = strlen(compat) + 1;
|
|
tsize += csize;
|
|
if (csize > len)
|
|
continue;
|
|
|
|
csize = snprintf(str, len, "C%s", compat);
|
|
for (c = str; c; ) {
|
|
c = strchr(c, ' ');
|
|
if (c)
|
|
*c++ = '_';
|
|
}
|
|
len -= csize;
|
|
str += csize;
|
|
}
|
|
|
|
return tsize;
|
|
}
|
|
|
|
int of_device_request_module(struct device *dev)
|
|
{
|
|
char *str;
|
|
ssize_t size;
|
|
int ret;
|
|
|
|
size = of_device_get_modalias(dev, NULL, 0);
|
|
if (size < 0)
|
|
return size;
|
|
|
|
str = kmalloc(size + 1, GFP_KERNEL);
|
|
if (!str)
|
|
return -ENOMEM;
|
|
|
|
of_device_get_modalias(dev, str, size);
|
|
str[size] = '\0';
|
|
ret = request_module(str);
|
|
kfree(str);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(of_device_request_module);
|
|
|
|
/**
|
|
* of_device_modalias - Fill buffer with newline terminated modalias string
|
|
*/
|
|
ssize_t of_device_modalias(struct device *dev, char *str, ssize_t len)
|
|
{
|
|
ssize_t sl = of_device_get_modalias(dev, str, len - 2);
|
|
if (sl < 0)
|
|
return sl;
|
|
if (sl > len - 2)
|
|
return -ENOMEM;
|
|
|
|
str[sl++] = '\n';
|
|
str[sl] = 0;
|
|
return sl;
|
|
}
|
|
EXPORT_SYMBOL_GPL(of_device_modalias);
|
|
|
|
/**
|
|
* of_device_uevent - Display OF related uevent information
|
|
*/
|
|
void of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
|
|
{
|
|
const char *compat, *type;
|
|
struct alias_prop *app;
|
|
struct property *p;
|
|
int seen = 0;
|
|
|
|
if ((!dev) || (!dev->of_node))
|
|
return;
|
|
|
|
add_uevent_var(env, "OF_NAME=%pOFn", dev->of_node);
|
|
add_uevent_var(env, "OF_FULLNAME=%pOF", dev->of_node);
|
|
type = of_node_get_device_type(dev->of_node);
|
|
if (type)
|
|
add_uevent_var(env, "OF_TYPE=%s", type);
|
|
|
|
/* Since the compatible field can contain pretty much anything
|
|
* it's not really legal to split it out with commas. We split it
|
|
* up using a number of environment variables instead. */
|
|
of_property_for_each_string(dev->of_node, "compatible", p, compat) {
|
|
add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat);
|
|
seen++;
|
|
}
|
|
add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen);
|
|
|
|
seen = 0;
|
|
mutex_lock(&of_mutex);
|
|
list_for_each_entry(app, &aliases_lookup, link) {
|
|
if (dev->of_node == app->np) {
|
|
add_uevent_var(env, "OF_ALIAS_%d=%s", seen,
|
|
app->alias);
|
|
seen++;
|
|
}
|
|
}
|
|
mutex_unlock(&of_mutex);
|
|
}
|
|
|
|
int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
|
|
{
|
|
int sl;
|
|
|
|
if ((!dev) || (!dev->of_node))
|
|
return -ENODEV;
|
|
|
|
/* Devicetree modalias is tricky, we add it in 2 steps */
|
|
if (add_uevent_var(env, "MODALIAS="))
|
|
return -ENOMEM;
|
|
|
|
sl = of_device_get_modalias(dev, &env->buf[env->buflen-1],
|
|
sizeof(env->buf) - env->buflen);
|
|
if (sl >= (sizeof(env->buf) - env->buflen))
|
|
return -ENOMEM;
|
|
env->buflen += sl;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(of_device_uevent_modalias);
|