Release 4.14 drivers/of/device.c
#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-mapping.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/amba/bus.h>
#include <asm/errno.h>
#include "of_private.h"
/**
* of_match_device - Tell if a struct device matches an of_device_id list
* @ids: 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);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Stephen Rothwell | 37 | 78.72% | 1 | 25.00% |
Grant C. Likely | 10 | 21.28% | 3 | 75.00% |
Total | 47 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL(of_match_device);
struct platform_device *of_dev_get(struct platform_device *dev)
{
struct device *tmp;
if (!dev)
return NULL;
tmp = get_device(&dev->dev);
if (tmp)
return to_platform_device(tmp);
else
return NULL;
}
Contributors
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Stephen Rothwell | 46 | 93.88% | 1 | 50.00% |
Grant C. Likely | 3 | 6.12% | 1 | 50.00% |
Total | 49 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL(of_dev_get);
void of_dev_put(struct platform_device *dev)
{
if (dev)
put_device(&dev->dev);
}
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Stephen Rothwell | 21 | 95.45% | 1 | 50.00% |
Grant C. Likely | 1 | 4.55% | 1 | 50.00% |
Total | 22 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL(of_dev_put);
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);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Grant C. Likely | 26 | 38.81% | 4 | 50.00% |
Stephen Rothwell | 24 | 35.82% | 1 | 12.50% |
Jeremy Kerr | 15 | 22.39% | 1 | 12.50% |
Zhen Lei | 1 | 1.49% | 1 | 12.50% |
Andy Shevchenko | 1 | 1.49% | 1 | 12.50% |
Total | 67 | 100.00% | 8 | 100.00% |
/**
* of_dma_configure - Setup DMA configuration
* @dev: Device to apply DMA configuration
* @np: Pointer to OF node having DMA configuration
*
* 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(struct device *dev, struct device_node *np)
{
u64 dma_addr, paddr, size = 0;
int ret;
bool coherent;
unsigned long offset;
const struct iommu_ops *iommu;
u64 mask;
ret = of_dma_get_range(np, &dma_addr, &paddr, &size);
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 (!dev_is_pci(dev) &&
#ifdef CONFIG_ARM_AMBA
dev->bus != &amba_bustype &&
#endif
dev->bus != &platform_bus_type)
return ret == -ENODEV ? 0 : ret;
dma_addr = offset = 0;
} else {
offset = PFN_DOWN(paddr - dma_addr);
/*
* 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\n",
size);
size = size + 1;
}
if (!size) {
dev_err(dev, "Adjusted size 0x%llx invalid\n", size);
return -EINVAL;
}
dev_dbg(dev, "dma_pfn_offset(%#08lx)\n", offset);
}
/*
* Set default coherent_dma_mask to 32 bit. Drivers are expected to
* setup the correct supported mask.
*/
if (!dev->coherent_dma_mask)
dev->coherent_dma_mask = DMA_BIT_MASK(32);
/*
* Set it to coherent_dma_mask by default if the architecture
* code has not set it.
*/
if (!dev->dma_mask)
dev->dma_mask = &dev->coherent_dma_mask;
if (!size)
size = max(dev->coherent_dma_mask, dev->coherent_dma_mask + 1);
dev->dma_pfn_offset = offset;
/*
* Limit coherent and dma mask based on size and default mask
* set by the driver.
*/
mask = DMA_BIT_MASK(ilog2(dma_addr + size - 1) + 1);
dev->coherent_dma_mask &= mask;
*dev->dma_mask &= mask;
coherent = of_dma_is_coherent(np);
dev_dbg(dev, "device is%sdma coherent\n",
coherent ? " " : " not ");
iommu = of_iommu_configure(dev, np);
if (IS_ERR(iommu) && PTR_ERR(iommu) == -EPROBE_DEFER)
return -EPROBE_DEFER;
dev_dbg(dev, "device is%sbehind an iommu\n",
iommu ? " " : " not ");
arch_setup_dma_ops(dev, dma_addr, size, iommu, coherent);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Murali Karicheri | 204 | 59.48% | 3 | 33.33% |
Robin Murphy | 109 | 31.78% | 3 | 33.33% |
Laurent Pinchart | 19 | 5.54% | 1 | 11.11% |
R Sricharan | 11 | 3.21% | 2 | 22.22% |
Total | 343 | 100.00% | 9 | 100.00% |
EXPORT_SYMBOL_GPL(of_dma_configure);
/**
* of_dma_deconfigure - Clean up DMA configuration
* @dev: Device for which to clean up DMA configuration
*
* Clean up all configuration performed by of_dma_configure_ops() and free all
* resources that have been allocated.
*/
void of_dma_deconfigure(struct device *dev)
{
arch_teardown_dma_ops(dev);
}
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Laurent Pinchart | 15 | 100.00% | 1 | 100.00% |
Total | 15 | 100.00% | 1 | 100.00% |
int of_device_register(struct platform_device *pdev)
{
device_initialize(&pdev->dev);
return of_device_add(pdev);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Grant C. Likely | 24 | 100.00% | 1 | 100.00% |
Total | 24 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(of_device_register);
void of_device_unregister(struct platform_device *ofdev)
{
device_unregister(&ofdev->dev);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Stephen Rothwell | 17 | 94.44% | 1 | 50.00% |
Grant C. Likely | 1 | 5.56% | 1 | 50.00% |
Total | 18 | 100.00% | 2 | 100.00% |
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;
}
Contributors
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Joachim Eastwood | 45 | 100.00% | 1 | 100.00% |
Total | 45 | 100.00% | 1 | 100.00% |
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 */
csize = snprintf(str, len, "of:N%sT%s", dev->of_node->name,
dev->of_node->type);
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Stephen Rothwell | 97 | 53.30% | 1 | 14.29% |
Rob Herring | 48 | 26.37% | 2 | 28.57% |
Rui Zhang | 18 | 9.89% | 1 | 14.29% |
Björn Andersson | 11 | 6.04% | 1 | 14.29% |
Grant C. Likely | 8 | 4.40% | 2 | 28.57% |
Total | 182 | 100.00% | 7 | 100.00% |
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Stephen Boyd | 91 | 100.00% | 1 | 100.00% |
Total | 91 | 100.00% | 1 | 100.00% |
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Rob Herring | 58 | 82.86% | 1 | 50.00% |
Björn Andersson | 12 | 17.14% | 1 | 50.00% |
Total | 70 | 100.00% | 2 | 100.00% |
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;
struct alias_prop *app;
struct property *p;
int seen = 0;
if ((!dev) || (!dev->of_node))
return;
add_uevent_var(env, "OF_NAME=%s", dev->of_node->name);
add_uevent_var(env, "OF_FULLNAME=%pOF", dev->of_node);
if (dev->of_node->type && strcmp("<NULL>", dev->of_node->type) != 0)
add_uevent_var(env, "OF_TYPE=%s", dev->of_node->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);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Grant C. Likely | 128 | 64.65% | 2 | 33.33% |
Stepan Moskovchenko | 57 | 28.79% | 1 | 16.67% |
Rob Herring | 11 | 5.56% | 2 | 33.33% |
Pantelis Antoniou | 2 | 1.01% | 1 | 16.67% |
Total | 198 | 100.00% | 6 | 100.00% |
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Grant C. Likely | 110 | 100.00% | 2 | 100.00% |
Total | 110 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(of_device_uevent_modalias);
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Grant C. Likely | 313 | 22.62% | 10 | 27.03% |
Stephen Rothwell | 294 | 21.24% | 3 | 8.11% |
Murali Karicheri | 219 | 15.82% | 3 | 8.11% |
Rob Herring | 123 | 8.89% | 3 | 8.11% |
Robin Murphy | 118 | 8.53% | 3 | 8.11% |
Stephen Boyd | 101 | 7.30% | 2 | 5.41% |
Stepan Moskovchenko | 60 | 4.34% | 1 | 2.70% |
Joachim Eastwood | 50 | 3.61% | 1 | 2.70% |
Laurent Pinchart | 35 | 2.53% | 2 | 5.41% |
Björn Andersson | 23 | 1.66% | 2 | 5.41% |
Rui Zhang | 18 | 1.30% | 1 | 2.70% |
Jeremy Kerr | 15 | 1.08% | 1 | 2.70% |
R Sricharan | 11 | 0.79% | 2 | 5.41% |
Pantelis Antoniou | 2 | 0.14% | 1 | 2.70% |
Andy Shevchenko | 1 | 0.07% | 1 | 2.70% |
Zhen Lei | 1 | 0.07% | 1 | 2.70% |
Total | 1384 | 100.00% | 37 | 100.00% |
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