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Generic Device Lookup Helpers

Browse Source 
Persistent tag for others to pull this branch from
 
 Based on patch series from Suzuki K Poulose <suzuki.poulose@arm.com>
 with Subject: [PATCH v3 0/7] drivers: Add generic device lookup helpers
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'generic_lookup_helpers' into for-next

Generic Device Lookup Helpers

Persistent tag for others to pull this branch from

Based on patch series from Suzuki K Poulose <suzuki.poulose@arm.com>
with Subject: [PATCH v3 0/7] drivers: Add generic device lookup helpers

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

* tag 'generic_lookup_helpers':
  platform: Add platform_find_device_by_driver() helper
  drivers: Add generic helper to match any device
  drivers: Introduce device lookup variants by ACPI_COMPANION device
  drivers: Introduce device lookup variants by device type
  drivers: Introduce device lookup variants by fwnode
  drivers: Introduce device lookup variants by of_node
  drivers: Introduce device lookup variants by name
This commit is contained in:
Jacek Anaszewski 2019-07-30 22:36:31 +02:00
commit be7fc2cc86
48 changed files with 341 additions and 383 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/amba/tegra-ahb.c
View File

@ -134,22 +134,13 @@ static inline void gizmo_writel(struct tegra_ahb *ahb, u32 value, u32 offset)
}
#ifdef CONFIG_TEGRA_IOMMU_SMMU
static int tegra_ahb_match_by_smmu(struct device *dev, const void *data)
{
struct tegra_ahb *ahb = dev_get_drvdata(dev);
const struct device_node *dn = data;
return (ahb->dev->of_node == dn) ? 1 : 0;
}
int tegra_ahb_enable_smmu(struct device_node *dn)
{
struct device *dev;
u32 val;
struct tegra_ahb *ahb;
dev = driver_find_device(&tegra_ahb_driver.driver, NULL, dn,
tegra_ahb_match_by_smmu);
dev = driver_find_device_by_of_node(&tegra_ahb_driver.driver, dn);
if (!dev)
return -EPROBE_DEFER;
ahb = dev_get_drvdata(dev);

24
drivers/base/bus.c
View File

@ -342,30 +342,6 @@ struct device *bus_find_device(struct bus_type *bus,
}
EXPORT_SYMBOL_GPL(bus_find_device);
static int match_name(struct device *dev, const void *data)
{
const char *name = data;
return sysfs_streq(name, dev_name(dev));
}
/**
* bus_find_device_by_name - device iterator for locating a particular device of a specific name
* @bus: bus type
* @start: Device to begin with
* @name: name of the device to match
*
* This is similar to the bus_find_device() function above, but it handles
* searching by a name automatically, no need to write another strcmp matching
* function.
*/
struct device *bus_find_device_by_name(struct bus_type *bus,
struct device *start, const char *name)
{
return bus_find_device(bus, start, (void *)name, match_name);
}
EXPORT_SYMBOL_GPL(bus_find_device_by_name);
/**
* subsys_find_device_by_id - find a device with a specific enumeration number
* @subsys: subsystem

39
drivers/base/core.c
View File

@ -2867,13 +2867,6 @@ struct device *device_create_with_groups(struct class *class,
}
EXPORT_SYMBOL_GPL(device_create_with_groups);
static int __match_devt(struct device *dev, const void *data)
{
const dev_t *devt = data;
return dev->devt == *devt;
}
/**
* device_destroy - removes a device that was created with device_create()
* @class: pointer to the struct class that this device was registered with
@ -2886,7 +2879,7 @@ void device_destroy(struct class *class, dev_t devt)
{
struct device *dev;
dev = class_find_device(class, NULL, &devt, __match_devt);
dev = class_find_device_by_devt(class, devt);
if (dev) {
put_device(dev);
device_unregister(dev);
@ -3357,8 +3350,38 @@ void device_set_of_node_from_dev(struct device *dev, const struct device *dev2)
}
EXPORT_SYMBOL_GPL(device_set_of_node_from_dev);
int device_match_name(struct device *dev, const void *name)
{
return sysfs_streq(dev_name(dev), name);
}
EXPORT_SYMBOL_GPL(device_match_name);
int device_match_of_node(struct device *dev, const void *np)
{
return dev->of_node == np;
}
EXPORT_SYMBOL_GPL(device_match_of_node);
int device_match_fwnode(struct device *dev, const void *fwnode)
{
return dev_fwnode(dev) == fwnode;
}
EXPORT_SYMBOL_GPL(device_match_fwnode);
int device_match_devt(struct device *dev, const void *pdevt)
{
return dev->devt == *(dev_t *)pdevt;
}
EXPORT_SYMBOL_GPL(device_match_devt);
int device_match_acpi_dev(struct device *dev, const void *adev)
{
return ACPI_COMPANION(dev) == adev;
}
EXPORT_SYMBOL(device_match_acpi_dev);
int device_match_any(struct device *dev, const void *unused)
{
return 1;
}
EXPORT_SYMBOL_GPL(device_match_any);

8
drivers/base/devcon.c
View File

@ -133,19 +133,13 @@ static struct bus_type *generic_match_buses[] = {
NULL,
};
static int device_fwnode_match(struct device *dev, const void *fwnode)
{
return dev_fwnode(dev) == fwnode;
}
static void *device_connection_fwnode_match(struct device_connection *con)
{
struct bus_type *bus;
struct device *dev;
for (bus = generic_match_buses[0]; bus; bus++) {
dev = bus_find_device(bus, NULL, (void *)con->fwnode,
device_fwnode_match);
dev = bus_find_device_by_fwnode(bus, con->fwnode);
if (dev && !strncmp(dev_name(dev), con->id, strlen(con->id)))
return dev;

14
drivers/base/platform.c
View File

@ -1197,6 +1197,20 @@ struct bus_type platform_bus_type = {
};
EXPORT_SYMBOL_GPL(platform_bus_type);
/**
* platform_find_device_by_driver - Find a platform device with a given
* driver.
* @start: The device to start the search from.
* @drv: The device driver to look for.
*/
struct device *platform_find_device_by_driver(struct device *start,
const struct device_driver *drv)
{
return bus_find_device(&platform_bus_type, start, drv,
(void *)platform_match);
}
EXPORT_SYMBOL_GPL(platform_find_device_by_driver);
int __init platform_bus_init(void)
{
int error;

8
drivers/fpga/fpga-bridge.c
View File

@ -19,11 +19,6 @@ static struct class *fpga_bridge_class;
/* Lock for adding/removing bridges to linked lists*/
static spinlock_t bridge_list_lock;
static int fpga_bridge_of_node_match(struct device *dev, const void *data)
{
return dev->of_node == data;
}
/**
* fpga_bridge_enable - Enable transactions on the bridge
*
@ -104,8 +99,7 @@ struct fpga_bridge *of_fpga_bridge_get(struct device_node *np,
{
struct device *dev;
dev = class_find_device(fpga_bridge_class, NULL, np,
fpga_bridge_of_node_match);
dev = class_find_device_by_of_node(fpga_bridge_class, np);
if (!dev)
return ERR_PTR(-ENODEV);

8
drivers/fpga/fpga-mgr.c
View File

@ -482,11 +482,6 @@ struct fpga_manager *fpga_mgr_get(struct device *dev)
}
EXPORT_SYMBOL_GPL(fpga_mgr_get);
static int fpga_mgr_of_node_match(struct device *dev, const void *data)
{
return dev->of_node == data;
}
/**
* of_fpga_mgr_get - Given a device node, get a reference to a fpga mgr.
*
@ -498,8 +493,7 @@ struct fpga_manager *of_fpga_mgr_get(struct device_node *node)
{
struct device *dev;
dev = class_find_device(fpga_mgr_class, NULL, node,
fpga_mgr_of_node_match);
dev = class_find_device_by_of_node(fpga_mgr_class, node);
if (!dev)
return ERR_PTR(-ENODEV);

7
drivers/gpu/drm/drm_mipi_dsi.c
View File

@ -93,11 +93,6 @@ static struct bus_type mipi_dsi_bus_type = {
.pm = &mipi_dsi_device_pm_ops,
};
static int of_device_match(struct device *dev, const void *data)
{
return dev->of_node == data;
}
/**
* of_find_mipi_dsi_device_by_node() - find the MIPI DSI device matching a
* device tree node
@ -110,7 +105,7 @@ struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np)
{
struct device *dev;
dev = bus_find_device(&mipi_dsi_bus_type, NULL, np, of_device_match);
dev = bus_find_device_by_of_node(&mipi_dsi_bus_type, np);
return dev ? to_mipi_dsi_device(dev) : NULL;
}

9
drivers/gpu/drm/exynos/exynos_drm_drv.c
View File

@ -242,9 +242,7 @@ static struct component_match *exynos_drm_match_add(struct device *dev)
if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
continue;
while ((d = bus_find_device(&platform_bus_type, p,
&info->driver->driver,
(void *)platform_bus_type.match))) {
while ((d = platform_find_device_by_driver(p, &info->driver->driver))) {
put_device(p);
if (!(info->flags & DRM_FIMC_DEVICE) ||
@ -412,9 +410,8 @@ static void exynos_drm_unregister_devices(void)
if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
continue;
while ((dev = bus_find_device(&platform_bus_type, NULL,
&info->driver->driver,
(void *)platform_bus_type.match))) {
while ((dev = platform_find_device_by_driver(NULL,
&info->driver->driver))) {
put_device(dev);
platform_device_unregister(to_platform_device(dev));
}

3
drivers/gpu/drm/mcde/mcde_drv.c
View File

@ -477,8 +477,7 @@ static int mcde_probe(struct platform_device *pdev)
struct device_driver *drv = &mcde_component_drivers[i]->driver;
struct device *p = NULL, *d;
while ((d = bus_find_device(&platform_bus_type, p, drv,
(void *)platform_bus_type.match))) {
while ((d = platform_find_device_by_driver(p, drv))) {
put_device(p);
component_match_add(dev, &match, mcde_compare_dev, d);
p = d;

3
drivers/gpu/drm/rockchip/rockchip_drm_drv.c
View File

@ -330,8 +330,7 @@ static struct component_match *rockchip_drm_match_add(struct device *dev)
struct device *p = NULL, *d;
do {
d = bus_find_device(&platform_bus_type, p, &drv->driver,
(void *)platform_bus_type.match);
d = platform_find_device_by_driver(p, &drv->driver);
put_device(p);
p = d;

3
drivers/gpu/drm/vc4/vc4_drv.c
View File

@ -237,8 +237,7 @@ static void vc4_match_add_drivers(struct device *dev,
struct device_driver *drv = &drivers[i]->driver;
struct device *p = NULL, *d;
while ((d = bus_find_device(&platform_bus_type, p, drv,
(void *)platform_bus_type.match))) {
while ((d = platform_find_device_by_driver(p, drv))) {
put_device(p);
component_match_add(dev, match, compare_dev, d);
p = d;

11
drivers/hwtracing/coresight/coresight-platform.c
View File

@ -37,11 +37,6 @@ static int coresight_alloc_conns(struct device *dev,
return 0;
}
int coresight_device_fwnode_match(struct device *dev, const void *fwnode)
{
return dev_fwnode(dev) == fwnode;
}
static struct device *
coresight_find_device_by_fwnode(struct fwnode_handle *fwnode)
{
@ -51,8 +46,7 @@ coresight_find_device_by_fwnode(struct fwnode_handle *fwnode)
* If we have a non-configurable replicator, it will be found on the
* platform bus.
*/
dev = bus_find_device(&platform_bus_type, NULL,
fwnode, coresight_device_fwnode_match);
dev = bus_find_device_by_fwnode(&platform_bus_type, fwnode);
if (dev)
return dev;
@ -60,8 +54,7 @@ coresight_find_device_by_fwnode(struct fwnode_handle *fwnode)
* We have a configurable component - circle through the AMBA bus
* looking for the device that matches the endpoint node.
*/
return bus_find_device(&amba_bustype, NULL,
fwnode, coresight_device_fwnode_match);
return bus_find_device_by_fwnode(&amba_bustype, fwnode);
}
#ifdef CONFIG_OF

2
drivers/hwtracing/coresight/coresight-priv.h
View File

@ -202,6 +202,4 @@ static inline void *coresight_get_uci_data(const struct amba_id *id)
void coresight_release_platform_data(struct coresight_platform_data *pdata);
int coresight_device_fwnode_match(struct device *dev, const void *fwnode);
#endif

4
drivers/hwtracing/coresight/coresight.c
View File

@ -1046,9 +1046,7 @@ static void coresight_fixup_device_conns(struct coresight_device *csdev)
struct coresight_connection *conn = &csdev->pdata->conns[i];
struct device *dev = NULL;
dev = bus_find_device(&coresight_bustype, NULL,
(void *)conn->child_fwnode,
coresight_device_fwnode_match);
dev = bus_find_device_by_fwnode(&coresight_bustype, conn->child_fwnode);
if (dev) {
conn->child_dev = to_coresight_device(dev);
/* and put reference from 'bus_find_device()' */

10
drivers/hwtracing/intel_th/core.c
View File

@ -789,12 +789,6 @@ static int intel_th_populate(struct intel_th *th)
return 0;
}
static int match_devt(struct device *dev, const void *data)
{
dev_t devt = (dev_t)(unsigned long)(void *)data;
return dev->devt == devt;
}
static int intel_th_output_open(struct inode *inode, struct file *file)
{
const struct file_operations *fops;
@ -802,9 +796,7 @@ static int intel_th_output_open(struct inode *inode, struct file *file)
struct device *dev;
int err;
dev = bus_find_device(&intel_th_bus, NULL,
(void *)(unsigned long)inode->i_rdev,
match_devt);
dev = bus_find_device_by_devt(&intel_th_bus, inode->i_rdev);
if (!dev || !dev->driver)
return -ENODEV;

9
drivers/hwtracing/stm/core.c
View File

@ -89,13 +89,6 @@ static struct class stm_class = {
.dev_groups = stm_groups,
};
static int stm_dev_match(struct device *dev, const void *data)
{
const char *name = data;
return sysfs_streq(name, dev_name(dev));
}
/**
* stm_find_device() - find stm device by name
* @buf: character buffer containing the name
@ -116,7 +109,7 @@ struct stm_device *stm_find_device(const char *buf)
if (!stm_core_up)
return NULL;
dev = class_find_device(&stm_class, NULL, buf, stm_dev_match);
dev = class_find_device_by_name(&stm_class, buf);
if (!dev)
return NULL;

8
drivers/i2c/busses/i2c-amd-mp2-pci.c
View File

@ -457,18 +457,12 @@ static struct pci_driver amd_mp2_pci_driver = {
};
module_pci_driver(amd_mp2_pci_driver);
static int amd_mp2_device_match(struct device *dev, const void *data)
{
return 1;
}
struct amd_mp2_dev *amd_mp2_find_device(void)
{
struct device *dev;
struct pci_dev *pci_dev;
dev = driver_find_device(&amd_mp2_pci_driver.driver, NULL, NULL,
amd_mp2_device_match);
dev = driver_find_next_device(&amd_mp2_pci_driver.driver, NULL);
if (!dev)
return NULL;

11
drivers/i2c/i2c-core-acpi.c
View File

@ -354,17 +354,11 @@ static int i2c_acpi_find_match_adapter(struct device *dev, const void *data)
return ACPI_HANDLE(dev) == (acpi_handle)data;
}
static int i2c_acpi_find_match_device(struct device *dev, const void *data)
{
return ACPI_COMPANION(dev) == data;
}
struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle)
{
struct device *dev;
struct device *dev = bus_find_device_by_acpi_dev(&i2c_bus_type, handle);
dev = bus_find_device(&i2c_bus_type, NULL, handle,
i2c_acpi_find_match_adapter);
return dev ? i2c_verify_adapter(dev) : NULL;
}
EXPORT_SYMBOL_GPL(i2c_acpi_find_adapter_by_handle);
@ -373,8 +367,7 @@ static struct i2c_client *i2c_acpi_find_client_by_adev(struct acpi_device *adev)
{
struct device *dev;
dev = bus_find_device(&i2c_bus_type, NULL, adev,
i2c_acpi_find_match_device);
dev = bus_find_device_by_acpi_dev(&i2c_bus_type, adev);
return dev ? i2c_verify_client(dev) : NULL;
}

7
drivers/i2c/i2c-core-of.c
View File

@ -113,11 +113,6 @@ void of_i2c_register_devices(struct i2c_adapter *adap)
of_node_put(bus);
}
static int of_dev_node_match(struct device *dev, const void *data)
{
return dev->of_node == data;
}
static int of_dev_or_parent_node_match(struct device *dev, const void *data)
{
if (dev->of_node == data)
@ -135,7 +130,7 @@ struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
struct device *dev;
struct i2c_client *client;
dev = bus_find_device(&i2c_bus_type, NULL, node, of_dev_node_match);
dev = bus_find_device_by_of_node(&i2c_bus_type, node);
if (!dev)
return NULL;

8
drivers/infiniband/hw/hns/hns_roce_hw_v1.c
View File

@ -4499,19 +4499,13 @@ static const struct acpi_device_id hns_roce_acpi_match[] = {
};
MODULE_DEVICE_TABLE(acpi, hns_roce_acpi_match);
static int hns_roce_node_match(struct device *dev, const void *fwnode)
{
return dev->fwnode == fwnode;
}
static struct
platform_device *hns_roce_find_pdev(struct fwnode_handle *fwnode)
{
struct device *dev;
/* get the 'device' corresponding to the matching 'fwnode' */
dev = bus_find_device(&platform_bus_type, NULL,
fwnode, hns_roce_node_match);
dev = bus_find_device_by_fwnode(&platform_bus_type, fwnode);
/* get the platform device */
return dev ? to_platform_device(dev) : NULL;
}

9
drivers/iommu/arm-smmu-v3.c
View File

@ -2034,16 +2034,11 @@ arm_smmu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova)
static struct platform_driver arm_smmu_driver;
static int arm_smmu_match_node(struct device *dev, const void *data)
{
return dev->fwnode == data;
}
static
struct arm_smmu_device *arm_smmu_get_by_fwnode(struct fwnode_handle *fwnode)
{
struct device *dev = driver_find_device(&arm_smmu_driver.driver, NULL,
fwnode, arm_smmu_match_node);
struct device *dev = driver_find_device_by_fwnode(&arm_smmu_driver.driver,
fwnode);
put_device(dev);
return dev ? dev_get_drvdata(dev) : NULL;
}

9
drivers/iommu/arm-smmu.c
View File

@ -1426,16 +1426,11 @@ static bool arm_smmu_capable(enum iommu_cap cap)
}
}
static int arm_smmu_match_node(struct device *dev, const void *data)
{
return dev->fwnode == data;
}
static
struct arm_smmu_device *arm_smmu_get_by_fwnode(struct fwnode_handle *fwnode)
{
struct device *dev = driver_find_device(&arm_smmu_driver.driver, NULL,
fwnode, arm_smmu_match_node);
struct device *dev = driver_find_device_by_fwnode(&arm_smmu_driver.driver,
fwnode);
put_device(dev);
return dev ? dev_get_drvdata(dev) : NULL;
}

9
drivers/leds/led-class.c
View File

@ -214,13 +214,6 @@ static int led_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(leds_class_dev_pm_ops, led_suspend, led_resume);
static int match_name(struct device *dev, const void *data)
{
if (!dev_name(dev))
return 0;
return !strcmp(dev_name(dev), (char *)data);
}
static int led_classdev_next_name(const char *init_name, char *name,
size_t len)
{
@ -231,7 +224,7 @@ static int led_classdev_next_name(const char *init_name, char *name,
strlcpy(name, init_name, len);
while ((ret < len) &&
(dev = class_find_device(leds_class, NULL, name, match_name))) {
(dev = class_find_device_by_name(leds_class, name))) {
put_device(dev);
ret = snprintf(name, len, "%s_%u", init_name, ++i);
}

14
drivers/mfd/altera-sysmgr.c
View File

@ -87,16 +87,6 @@ static struct regmap_config altr_sysmgr_regmap_cfg = {
.use_single_write = true,
};
/**
* sysmgr_match_phandle
* Matching function used by driver_find_device().
* Return: True if match is found, otherwise false.
*/
static int sysmgr_match_phandle(struct device *dev, const void *data)
{
return dev->of_node == (const struct device_node *)data;
}
/**
* altr_sysmgr_regmap_lookup_by_phandle
* Find the sysmgr previous configured in probe() and return regmap property.
@ -117,8 +107,8 @@ struct regmap *altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np,
if (!sysmgr_np)
return ERR_PTR(-ENODEV);
dev = driver_find_device(&altr_sysmgr_driver.driver, NULL,
(void *)sysmgr_np, sysmgr_match_phandle);
dev = driver_find_device_by_of_node(&altr_sysmgr_driver.driver,
(void *)sysmgr_np);
of_node_put(sysmgr_np);
if (!dev)
return ERR_PTR(-EPROBE_DEFER);

9
drivers/misc/mei/main.c
View File

@ -858,13 +858,6 @@ static ssize_t dev_state_show(struct device *device,
}
static DEVICE_ATTR_RO(dev_state);
static int match_devt(struct device *dev, const void *data)
{
const dev_t *devt = data;
return dev->devt == *devt;
}
/**
* dev_set_devstate: set to new device state and notify sysfs file.
*
@ -880,7 +873,7 @@ void mei_set_devstate(struct mei_device *dev, enum mei_dev_state state)
dev->dev_state = state;
clsdev = class_find_device(mei_class, NULL, &dev->cdev.dev, match_devt);
clsdev = class_find_device_by_devt(mei_class, dev->cdev.dev);
if (clsdev) {
sysfs_notify(&clsdev->kobj, NULL, "dev_state");
put_device(clsdev);

7
drivers/mux/core.c
View File

@ -405,17 +405,12 @@ int mux_control_deselect(struct mux_control *mux)
}
EXPORT_SYMBOL_GPL(mux_control_deselect);
static int of_dev_node_match(struct device *dev, const void *data)
{
return dev->of_node == data;
}
/* Note this function returns a reference to the mux_chip dev. */
static struct mux_chip *of_find_mux_chip_by_node(struct device_node *np)
{
struct device *dev;
dev = class_find_device(&mux_class, NULL, np, of_dev_node_match);
dev = class_find_device_by_of_node(&mux_class, np);
return dev ? to_mux_chip(dev) : NULL;
}

8
drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
View File

@ -754,17 +754,11 @@ struct dsaf_misc_op *hns_misc_op_get(struct dsaf_device *dsaf_dev)
return (void *)misc_op;
}
static int hns_dsaf_dev_match(struct device *dev, const void *fwnode)
{
return dev->fwnode == fwnode;
}
struct
platform_device *hns_dsaf_find_platform_device(struct fwnode_handle *fwnode)
{
struct device *dev;
dev = bus_find_device(&platform_bus_type, NULL,
fwnode, hns_dsaf_dev_match);
dev = bus_find_device_by_fwnode(&platform_bus_type, fwnode);
return dev ? to_platform_device(dev) : NULL;
}

9
drivers/net/phy/mdio_bus.c
View File

@ -262,11 +262,6 @@ static struct class mdio_bus_class = {
};
#if IS_ENABLED(CONFIG_OF_MDIO)
/* Helper function for of_mdio_find_bus */
static int of_mdio_bus_match(struct device *dev, const void *mdio_bus_np)
{
return dev->of_node == mdio_bus_np;
}
/**
* of_mdio_find_bus - Given an mii_bus node, find the mii_bus.
* @mdio_bus_np: Pointer to the mii_bus.
@ -287,9 +282,7 @@ struct mii_bus *of_mdio_find_bus(struct device_node *mdio_bus_np)
if (!mdio_bus_np)
return NULL;
d = class_find_device(&mdio_bus_class, NULL, mdio_bus_np,
of_mdio_bus_match);
d = class_find_device_by_of_node(&mdio_bus_class, mdio_bus_np);
return d ? to_mii_bus(d) : NULL;
}
EXPORT_SYMBOL(of_mdio_find_bus);

7
drivers/nvmem/core.c
View File

@ -76,11 +76,6 @@ static struct bus_type nvmem_bus_type = {
.name = "nvmem",
};
static int of_nvmem_match(struct device *dev, const void *nvmem_np)
{
return dev->of_node == nvmem_np;
}
static struct nvmem_device *of_nvmem_find(struct device_node *nvmem_np)
{
struct device *d;
@ -88,7 +83,7 @@ static struct nvmem_device *of_nvmem_find(struct device_node *nvmem_np)
if (!nvmem_np)
return NULL;
d = bus_find_device(&nvmem_bus_type, NULL, nvmem_np, of_nvmem_match);
d = bus_find_device_by_of_node(&nvmem_bus_type, nvmem_np);
if (!d)
return NULL;

8
drivers/of/of_mdio.c
View File

@ -280,12 +280,6 @@ unregister:
}
EXPORT_SYMBOL(of_mdiobus_register);
/* Helper function for of_phy_find_device */
static int of_phy_match(struct device *dev, const void *phy_np)
{
return dev->of_node == phy_np;
}
/**
* of_phy_find_device - Give a PHY node, find the phy_device
* @phy_np: Pointer to the phy's device tree node
@ -301,7 +295,7 @@ struct phy_device *of_phy_find_device(struct device_node *phy_np)
if (!phy_np)
return NULL;
d = bus_find_device(&mdio_bus_type, NULL, phy_np, of_phy_match);
d = bus_find_device_by_of_node(&mdio_bus_type, phy_np);
if (d) {
mdiodev = to_mdio_device(d);
if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)

7
drivers/of/platform.c
View File

@ -37,11 +37,6 @@ static const struct of_device_id of_skipped_node_table[] = {
{} /* Empty terminated list */
};
static int of_dev_node_match(struct device *dev, const void *data)
{
return dev->of_node == data;
}
/**
* of_find_device_by_node - Find the platform_device associated with a node
* @np: Pointer to device tree node
@ -55,7 +50,7 @@ struct platform_device *of_find_device_by_node(struct device_node *np)
{
struct device *dev;
dev = bus_find_device(&platform_bus_type, NULL, np, of_dev_node_match);
dev = bus_find_device_by_of_node(&platform_bus_type, np);
return dev ? to_platform_device(dev) : NULL;
}
EXPORT_SYMBOL(of_find_device_by_node);

7
drivers/pci/probe.c
View File

@ -64,11 +64,6 @@ static struct resource *get_pci_domain_busn_res(int domain_nr)
return &r->res;
}
static int find_anything(struct device *dev, const void *data)
{
return 1;
}
/*
* Some device drivers need know if PCI is initiated.
* Basically, we think PCI is not initiated when there
@ -79,7 +74,7 @@ int no_pci_devices(void)
struct device *dev;
int no_devices;
dev = bus_find_device(&pci_bus_type, NULL, NULL, find_anything);
dev = bus_find_next_device(&pci_bus_type, NULL);
no_devices = (dev == NULL);
put_device(dev);
return no_devices;

7
drivers/regulator/of_regulator.c
View File

@ -460,16 +460,11 @@ error:
return NULL;
}
static int of_node_match(struct device *dev, const void *data)
{
return dev->of_node == data;
}
struct regulator_dev *of_find_regulator_by_node(struct device_node *np)
{
struct device *dev;
dev = class_find_device(&regulator_class, NULL, np, of_node_match);
dev = class_find_device_by_of_node(&regulator_class, np);
return dev ? dev_to_rdev(dev) : NULL;
}

11
drivers/rtc/interface.c
View File

@ -663,21 +663,12 @@ void rtc_update_irq(struct rtc_device *rtc,
}
EXPORT_SYMBOL_GPL(rtc_update_irq);
static int __rtc_match(struct device *dev, const void *data)
{
const char *name = data;
if (strcmp(dev_name(dev), name) == 0)
return 1;
return 0;
}
struct rtc_device *rtc_class_open(const char *name)
{
struct device *dev;
struct rtc_device *rtc = NULL;
dev = class_find_device(rtc_class, NULL, name, __rtc_match);
dev = class_find_device_by_name(rtc_class, name);
if (dev)
rtc = to_rtc_device(dev);

18
drivers/s390/cio/ccwgroup.c
View File

@ -581,11 +581,6 @@ int ccwgroup_driver_register(struct ccwgroup_driver *cdriver)
}
EXPORT_SYMBOL(ccwgroup_driver_register);
static int __ccwgroup_match_all(struct device *dev, const void *data)
{
return 1;
}
/**
* ccwgroup_driver_unregister() - deregister a ccw group driver
* @cdriver: driver to be deregistered
@ -597,8 +592,7 @@ void ccwgroup_driver_unregister(struct ccwgroup_driver *cdriver)
struct device *dev;
/* We don't want ccwgroup devices to live longer than their driver. */
while ((dev = driver_find_device(&cdriver->driver, NULL, NULL,
__ccwgroup_match_all))) {
while ((dev = driver_find_next_device(&cdriver->driver, NULL))) {
struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
ccwgroup_ungroup(gdev);
@ -608,13 +602,6 @@ void ccwgroup_driver_unregister(struct ccwgroup_driver *cdriver)
}
EXPORT_SYMBOL(ccwgroup_driver_unregister);
static int __ccwgroupdev_check_busid(struct device *dev, const void *id)
{
const char *bus_id = id;
return (strcmp(bus_id, dev_name(dev)) == 0);
}
/**
* get_ccwgroupdev_by_busid() - obtain device from a bus id
* @gdrv: driver the device is owned by
@ -631,8 +618,7 @@ struct ccwgroup_device *get_ccwgroupdev_by_busid(struct ccwgroup_driver *gdrv,
{
struct device *dev;
dev = driver_find_device(&gdrv->driver, NULL, bus_id,
__ccwgroupdev_check_busid);
dev = driver_find_device_by_name(&gdrv->driver, bus_id);
return dev ? to_ccwgroupdev(dev) : NULL;
}

15
drivers/s390/cio/device.c
View File

@ -1695,18 +1695,6 @@ int ccw_device_force_console(struct ccw_device *cdev)
EXPORT_SYMBOL_GPL(ccw_device_force_console);
#endif
/*
* get ccw_device matching the busid, but only if owned by cdrv
*/
static int
__ccwdev_check_busid(struct device *dev, const void *id)
{
const char *bus_id = id;
return (strcmp(bus_id, dev_name(dev)) == 0);
}
/**
* get_ccwdev_by_busid() - obtain device from a bus id
* @cdrv: driver the device is owned by
@ -1723,8 +1711,7 @@ struct ccw_device *get_ccwdev_by_busid(struct ccw_driver *cdrv,
{
struct device *dev;
dev = driver_find_device(&cdrv->driver, NULL, (void *)bus_id,
__ccwdev_check_busid);
dev = driver_find_device_by_name(&cdrv->driver, bus_id);
return dev ? to_ccwdev(dev) : NULL;
}

22
drivers/s390/crypto/zcrypt_api.c
View File

@ -133,18 +133,6 @@ struct zcdn_device {
static int zcdn_create(const char *name);
static int zcdn_destroy(const char *name);
/* helper function, matches the name for find_zcdndev_by_name() */
static int __match_zcdn_name(struct device *dev, const void *data)
{
return strcmp(dev_name(dev), (const char *)data) == 0;
}
/* helper function, matches the devt value for find_zcdndev_by_devt() */
static int __match_zcdn_devt(struct device *dev, const void *data)
{
return dev->devt == *((dev_t *) data);
}
/*
* Find zcdn device by name.
* Returns reference to the zcdn device which needs to be released
@ -152,10 +140,7 @@ static int __match_zcdn_devt(struct device *dev, const void *data)
*/
static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
{
struct device *dev =
class_find_device(zcrypt_class, NULL,
(void *) name,
__match_zcdn_name);
struct device *dev = class_find_device_by_name(zcrypt_class, name);
return dev ? to_zcdn_dev(dev) : NULL;
}
@ -167,10 +152,7 @@ static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
*/
static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
{
struct device *dev =
class_find_device(zcrypt_class, NULL,
(void *) &devt,
__match_zcdn_devt);
struct device *dev = class_find_device_by_devt(zcrypt_class, devt);
return dev ? to_zcdn_dev(dev) : NULL;
}

9
drivers/scsi/scsi_proc.c
View File

@ -372,15 +372,10 @@ static ssize_t proc_scsi_write(struct file *file, const char __user *buf,
return err;
}
static int always_match(struct device *dev, const void *data)
{
return 1;
}
static inline struct device *next_scsi_device(struct device *start)
{
struct device *next = bus_find_device(&scsi_bus_type, start, NULL,
always_match);
struct device *next = bus_find_next_device(&scsi_bus_type, start);
put_device(start);
return next;
}

28
drivers/spi/spi.c
View File

@ -3652,37 +3652,25 @@ EXPORT_SYMBOL_GPL(spi_write_then_read);
/*-------------------------------------------------------------------------*/
#if IS_ENABLED(CONFIG_OF)
static int __spi_of_device_match(struct device *dev, const void *data)
{
return dev->of_node == data;
}
/* must call put_device() when done with returned spi_device device */
struct spi_device *of_find_spi_device_by_node(struct device_node *node)
{
struct device *dev = bus_find_device(&spi_bus_type, NULL, node,
__spi_of_device_match);
struct device *dev = bus_find_device_by_of_node(&spi_bus_type, node);
return dev ? to_spi_device(dev) : NULL;
}
EXPORT_SYMBOL_GPL(of_find_spi_device_by_node);
#endif /* IS_ENABLED(CONFIG_OF) */
#if IS_ENABLED(CONFIG_OF_DYNAMIC)
static int __spi_of_controller_match(struct device *dev, const void *data)
{
return dev->of_node == data;
}
/* the spi controllers are not using spi_bus, so we find it with another way */
static struct spi_controller *of_find_spi_controller_by_node(struct device_node *node)
{
struct device *dev;
dev = class_find_device(&spi_master_class, NULL, node,
__spi_of_controller_match);
dev = class_find_device_by_of_node(&spi_master_class, node);
if (!dev && IS_ENABLED(CONFIG_SPI_SLAVE))
dev = class_find_device(&spi_slave_class, NULL, node,
__spi_of_controller_match);
dev = class_find_device_by_of_node(&spi_slave_class, node);
if (!dev)
return NULL;
@ -3753,11 +3741,6 @@ static int spi_acpi_controller_match(struct device *dev, const void *data)
return ACPI_COMPANION(dev->parent) == data;
}
static int spi_acpi_device_match(struct device *dev, const void *data)
{
return ACPI_COMPANION(dev) == data;
}
static struct spi_controller *acpi_spi_find_controller_by_adev(struct acpi_device *adev)
{
struct device *dev;
@ -3777,8 +3760,7 @@ static struct spi_device *acpi_spi_find_device_by_adev(struct acpi_device *adev)
{
struct device *dev;
dev = bus_find_device(&spi_bus_type, NULL, adev, spi_acpi_device_match);
dev = bus_find_device_by_acpi_dev(&spi_bus_type, adev);
return dev ? to_spi_device(dev) : NULL;
}

8
drivers/tty/tty_io.c
View File

@ -2952,17 +2952,11 @@ void do_SAK(struct tty_struct *tty)
EXPORT_SYMBOL(do_SAK);
static int dev_match_devt(struct device *dev, const void *data)
{
const dev_t *devt = data;
return dev->devt == *devt;
}
/* Must put_device() after it's unused! */
static struct device *tty_get_device(struct tty_struct *tty)
{
dev_t devt = tty_devnum(tty);
return class_find_device(tty_class, NULL, &devt, dev_match_devt);
return class_find_device_by_devt(tty_class, devt);
}

8
drivers/usb/core/devio.c
View File

@ -942,17 +942,11 @@ error:
return ret;
}
static int match_devt(struct device *dev, const void *data)
{
return dev->devt == (dev_t)(unsigned long)(void *)data;
}
static struct usb_device *usbdev_lookup_by_devt(dev_t devt)
{
struct device *dev;
dev = bus_find_device(&usb_bus_type, NULL,
(void *) (unsigned long) devt, match_devt);
dev = bus_find_device_by_devt(&usb_bus_type, devt);
if (!dev)
return NULL;
return to_usb_device(dev);

16
drivers/usb/roles/class.c
View File

@ -85,16 +85,6 @@ enum usb_role usb_role_switch_get_role(struct usb_role_switch *sw)
}
EXPORT_SYMBOL_GPL(usb_role_switch_get_role);
static int switch_fwnode_match(struct device *dev, const void *fwnode)
{
return dev_fwnode(dev) == fwnode;
}
static int switch_name_match(struct device *dev, const void *name)
{
return !strcmp((const char *)name, dev_name(dev));
}
static void *usb_role_switch_match(struct device_connection *con, int ep,
void *data)
{
@ -104,11 +94,9 @@ static void *usb_role_switch_match(struct device_connection *con, int ep,
if (con->id && !fwnode_property_present(con->fwnode, con->id))
return NULL;
dev = class_find_device(role_class, NULL, con->fwnode,
switch_fwnode_match);
dev = class_find_device_by_fwnode(role_class, con->fwnode);
} else {
dev = class_find_device(role_class, NULL, con->endpoint[ep],
switch_name_match);
dev = class_find_device_by_name(role_class, con->endpoint[ep]);
}
return dev ? to_role_switch(dev) : ERR_PTR(-EPROBE_DEFER);

16
drivers/usb/typec/class.c
View File

@ -205,16 +205,6 @@ static void typec_altmode_put_partner(struct altmode *altmode)
put_device(&adev->dev);
}
static int typec_port_fwnode_match(struct device *dev, const void *fwnode)
{
return dev_fwnode(dev) == fwnode;
}
static int typec_port_name_match(struct device *dev, const void *name)
{
return !strcmp((const char *)name, dev_name(dev));
}
static void *typec_port_match(struct device_connection *con, int ep, void *data)
{
struct device *dev;
@ -224,11 +214,9 @@ static void *typec_port_match(struct device_connection *con, int ep, void *data)
* we need to return ERR_PTR(-PROBE_DEFER) when there is no device.
*/
if (con->fwnode)
return class_find_device(typec_class, NULL, con->fwnode,
typec_port_fwnode_match);
return class_find_device_by_fwnode(typec_class, con->fwnode);
dev = class_find_device(typec_class, NULL, con->endpoint[ep],
typec_port_name_match);
dev = class_find_device_by_name(typec_class, con->endpoint[ep]);
return dev ? dev : ERR_PTR(-EPROBE_DEFER);
}

237
include/linux/device.h
View File

@ -164,16 +164,100 @@ void subsys_dev_iter_init(struct subsys_dev_iter *iter,
struct device *subsys_dev_iter_next(struct subsys_dev_iter *iter);
void subsys_dev_iter_exit(struct subsys_dev_iter *iter);
int device_match_name(struct device *dev, const void *name);
int device_match_of_node(struct device *dev, const void *np);
int device_match_fwnode(struct device *dev, const void *fwnode);
int device_match_devt(struct device *dev, const void *pdevt);
int device_match_acpi_dev(struct device *dev, const void *adev);
int device_match_any(struct device *dev, const void *unused);
int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data,
int (*fn)(struct device *dev, void *data));
struct device *bus_find_device(struct bus_type *bus, struct device *start,
const void *data,
int (*match)(struct device *dev, const void *data));
struct device *bus_find_device_by_name(struct bus_type *bus,
struct device *start,
const char *name);
/**
* bus_find_device_by_name - device iterator for locating a particular device
* of a specific name.
* @bus: bus type
* @start: Device to begin with
* @name: name of the device to match
*/
static inline struct device *bus_find_device_by_name(struct bus_type *bus,
struct device *start,
const char *name)
{
return bus_find_device(bus, start, name, device_match_name);
}
/**
* bus_find_device_by_of_node : device iterator for locating a particular device
* matching the of_node.
* @bus: bus type
* @np: of_node of the device to match.
*/
static inline struct device *
bus_find_device_by_of_node(struct bus_type *bus, const struct device_node *np)
{
return bus_find_device(bus, NULL, np, device_match_of_node);
}
/**
* bus_find_device_by_fwnode : device iterator for locating a particular device
* matching the fwnode.
* @bus: bus type
* @fwnode: fwnode of the device to match.
*/
static inline struct device *
bus_find_device_by_fwnode(struct bus_type *bus, const struct fwnode_handle *fwnode)
{
return bus_find_device(bus, NULL, fwnode, device_match_fwnode);
}
/**
* bus_find_device_by_devt : device iterator for locating a particular device
* matching the device type.
* @bus: bus type
* @devt: device type of the device to match.
*/
static inline struct device *bus_find_device_by_devt(struct bus_type *bus,
dev_t devt)
{
return bus_find_device(bus, NULL, &devt, device_match_devt);
}
/**
* bus_find_next_device - Find the next device after a given device in a
* given bus.
*/
static inline struct device *
bus_find_next_device(struct bus_type *bus,struct device *cur)
{
return bus_find_device(bus, cur, NULL, device_match_any);
}
#ifdef CONFIG_ACPI
struct acpi_device;
/**
* bus_find_device_by_acpi_dev : device iterator for locating a particular device
* matching the ACPI COMPANION device.
* @bus: bus type
* @adev: ACPI COMPANION device to match.
*/
static inline struct device *
bus_find_device_by_acpi_dev(struct bus_type *bus, const struct acpi_device *adev)
{
return bus_find_device(bus, NULL, adev, device_match_acpi_dev);
}
#else
static inline struct device *
bus_find_device_by_acpi_dev(struct bus_type *bus, const void *adev)
{
return NULL;
}
#endif
struct device *subsys_find_device_by_id(struct bus_type *bus, unsigned int id,
struct device *hint);
int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,
@ -342,6 +426,83 @@ struct device *driver_find_device(struct device_driver *drv,
struct device *start, const void *data,
int (*match)(struct device *dev, const void *data));
/**
* driver_find_device_by_name - device iterator for locating a particular device
* of a specific name.
* @driver: the driver we're iterating
* @name: name of the device to match
*/
static inline struct device *driver_find_device_by_name(struct device_driver *drv,
const char *name)
{
return driver_find_device(drv, NULL, name, device_match_name);
}
/**
* driver_find_device_by_of_node- device iterator for locating a particular device
* by of_node pointer.
* @driver: the driver we're iterating
* @np: of_node pointer to match.
*/
static inline struct device *
driver_find_device_by_of_node(struct device_driver *drv,
const struct device_node *np)
{
return driver_find_device(drv, NULL, np, device_match_of_node);
}
/**
* driver_find_device_by_fwnode- device iterator for locating a particular device
* by fwnode pointer.
* @driver: the driver we're iterating
* @fwnode: fwnode pointer to match.
*/
static inline struct device *
driver_find_device_by_fwnode(struct device_driver *drv,
const struct fwnode_handle *fwnode)
{
return driver_find_device(drv, NULL, fwnode, device_match_fwnode);
}
/**
* driver_find_device_by_devt- device iterator for locating a particular device
* by devt.
* @driver: the driver we're iterating
* @devt: devt pointer to match.
*/
static inline struct device *driver_find_device_by_devt(struct device_driver *drv,
dev_t devt)
{
return driver_find_device(drv, NULL, &devt, device_match_devt);
}
static inline struct device *driver_find_next_device(struct device_driver *drv,
struct device *start)
{
return driver_find_device(drv, start, NULL, device_match_any);
}
#ifdef CONFIG_ACPI
/**
* driver_find_device_by_acpi_dev : device iterator for locating a particular
* device matching the ACPI_COMPANION device.
* @driver: the driver we're iterating
* @adev: ACPI_COMPANION device to match.
*/
static inline struct device *
driver_find_device_by_acpi_dev(struct device_driver *drv,
const struct acpi_device *adev)
{
return driver_find_device(drv, NULL, adev, device_match_acpi_dev);
}
#else
static inline struct device *
driver_find_device_by_acpi_dev(struct device_driver *drv, const void *adev)
{
return NULL;
}
#endif
void driver_deferred_probe_add(struct device *dev);
int driver_deferred_probe_check_state(struct device *dev);
int driver_deferred_probe_check_state_continue(struct device *dev);
@ -471,6 +632,76 @@ extern struct device *class_find_device(struct class *class,
struct device *start, const void *data,
int (*match)(struct device *, const void *));
/**
* class_find_device_by_name - device iterator for locating a particular device
* of a specific name.
* @class: class type
* @name: name of the device to match
*/
static inline struct device *class_find_device_by_name(struct class *class,
const char *name)
{
return class_find_device(class, NULL, name, device_match_name);
}
/**
* class_find_device_by_of_node : device iterator for locating a particular device
* matching the of_node.
* @class: class type
* @np: of_node of the device to match.
*/
static inline struct device *
class_find_device_by_of_node(struct class *class, const struct device_node *np)
{
return class_find_device(class, NULL, np, device_match_of_node);
}
/**
* class_find_device_by_fwnode : device iterator for locating a particular device
* matching the fwnode.
* @class: class type
* @fwnode: fwnode of the device to match.
*/
static inline struct device *
class_find_device_by_fwnode(struct class *class,
const struct fwnode_handle *fwnode)
{
return class_find_device(class, NULL, fwnode, device_match_fwnode);
}
/**
* class_find_device_by_devt : device iterator for locating a particular device
* matching the device type.
* @class: class type
* @devt: device type of the device to match.
*/
static inline struct device *class_find_device_by_devt(struct class *class,
dev_t devt)
{
return class_find_device(class, NULL, &devt, device_match_devt);
}
#ifdef CONFIG_ACPI
struct acpi_device;
/**
* class_find_device_by_acpi_dev : device iterator for locating a particular
* device matching the ACPI_COMPANION device.
* @class: class type
* @adev: ACPI_COMPANION device to match.
*/
static inline struct device *
class_find_device_by_acpi_dev(struct class *class, const struct acpi_device *adev)
{
return class_find_device(class, NULL, adev, device_match_acpi_dev);
}
#else
static inline struct device *
class_find_device_by_acpi_dev(struct class *class, const void *adev)
{
return NULL;
}
#endif
struct class_attribute {
struct attribute attr;
ssize_t (*show)(struct class *class, struct class_attribute *attr,

3
include/linux/platform_device.h
View File

@ -51,6 +51,9 @@ extern struct device platform_bus;
extern void arch_setup_pdev_archdata(struct platform_device *);
extern struct resource *platform_get_resource(struct platform_device *,
unsigned int, unsigned int);
extern struct device *
platform_find_device_by_driver(struct device *start,
const struct device_driver *drv);
extern void __iomem *
devm_platform_ioremap_resource(struct platform_device *pdev,
unsigned int index);

7
net/ieee802154/core.c
View File

@ -23,11 +23,6 @@
LIST_HEAD(cfg802154_rdev_list);
int cfg802154_rdev_list_generation;
static int wpan_phy_match(struct device *dev, const void *data)
{
return !strcmp(dev_name(dev), (const char *)data);
}
struct wpan_phy *wpan_phy_find(const char *str)
{
struct device *dev;
@ -35,7 +30,7 @@ struct wpan_phy *wpan_phy_find(const char *str)
if (WARN_ON(!str))
return NULL;
dev = class_find_device(&wpan_phy_class, NULL, str, wpan_phy_match);
dev = class_find_device_by_name(&wpan_phy_class, str);
if (!dev)
return NULL;

9
sound/soc/rockchip/rk3399_gru_sound.c
View File

@ -422,11 +422,6 @@ static const struct dailink_match_data dailink_match[] = {
},
};
static int of_dev_node_match(struct device *dev, const void *data)
{
return dev->of_node == data;
}
static int rockchip_sound_codec_node_match(struct device_node *np_codec)
{
struct device *dev;
@ -438,8 +433,8 @@ static int rockchip_sound_codec_node_match(struct device_node *np_codec)
continue;
if (dailink_match[i].bus_type) {
dev = bus_find_device(dailink_match[i].bus_type, NULL,
np_codec, of_dev_node_match);
dev = bus_find_device_by_of_node(dailink_match[i].bus_type,
np_codec);
if (!dev)
continue;
put_device(dev);