Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6: firmware: remove orphaned Email kobject: use the proper printk level for kobject error Driver core: kill unused code Driver core: keep PHYSDEV for old struct class_device update Documentation/driver-model/platform.txt
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@ -96,6 +96,46 @@ System setup also associates those clocks with the device, so that that
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calls to clk_get(&pdev->dev, clock_name) return them as needed.
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Legacy Drivers: Device Probing
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Some drivers are not fully converted to the driver model, because they take
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on a non-driver role: the driver registers its platform device, rather than
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leaving that for system infrastructure. Such drivers can't be hotplugged
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or coldplugged, since those mechanisms require device creation to be in a
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different system component than the driver.
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The only "good" reason for this is to handle older system designs which, like
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original IBM PCs, rely on error-prone "probe-the-hardware" models for hardware
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configuration. Newer systems have largely abandoned that model, in favor of
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bus-level support for dynamic configuration (PCI, USB), or device tables
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provided by the boot firmware (e.g. PNPACPI on x86). There are too many
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conflicting options about what might be where, and even educated guesses by
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an operating system will be wrong often enough to make trouble.
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This style of driver is discouraged. If you're updating such a driver,
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please try to move the device enumeration to a more appropriate location,
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outside the driver. This will usually be cleanup, since such drivers
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tend to already have "normal" modes, such as ones using device nodes that
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were created by PNP or by platform device setup.
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None the less, there are some APIs to support such legacy drivers. Avoid
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using these calls except with such hotplug-deficient drivers.
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struct platform_device *platform_device_alloc(
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char *name, unsigned id);
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You can use platform_device_alloc() to dynamically allocate a device, which
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you will then initialize with resources and platform_device_register().
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A better solution is usually:
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struct platform_device *platform_device_register_simple(
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char *name, unsigned id,
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struct resource *res, unsigned nres);
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You can use platform_device_register_simple() as a one-step call to allocate
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and register a device.
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Device Naming and Driver Binding
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The platform_device.dev.bus_id is the canonical name for the devices.
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@ -1,7 +1,7 @@
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request_firmware() hotplug interface:
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------------------------------------
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Copyright (C) 2003 Manuel Estrada Sainz <ranty@debian.org>
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Copyright (C) 2003 Manuel Estrada Sainz
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Why:
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---
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@ -1,7 +1,7 @@
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/*
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* firmware_sample_driver.c -
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*
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* Copyright (c) 2003 Manuel Estrada Sainz <ranty@debian.org>
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* Copyright (c) 2003 Manuel Estrada Sainz
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*
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* Sample code on how to use request_firmware() from drivers.
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*
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@ -1,7 +1,7 @@
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/*
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* firmware_sample_firmware_class.c -
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*
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* Copyright (c) 2003 Manuel Estrada Sainz <ranty@debian.org>
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* Copyright (c) 2003 Manuel Estrada Sainz
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*
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* NOTE: This is just a probe of concept, if you think that your driver would
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* be well served by this mechanism please contact me first.
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@ -19,7 +19,7 @@
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#include <linux/firmware.h>
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MODULE_AUTHOR("Manuel Estrada Sainz <ranty@debian.org>");
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MODULE_AUTHOR("Manuel Estrada Sainz");
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MODULE_DESCRIPTION("Hackish sample for using firmware class directly");
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MODULE_LICENSE("GPL");
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@ -369,36 +369,6 @@ char *make_class_name(const char *name, struct kobject *kobj)
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return class_name;
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}
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static int deprecated_class_uevent(char **envp, int num_envp, int *cur_index,
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char *buffer, int buffer_size,
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int *cur_len,
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struct class_device *class_dev)
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{
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struct device *dev = class_dev->dev;
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char *path;
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if (!dev)
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return 0;
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/* add device, backing this class device (deprecated) */
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path = kobject_get_path(&dev->kobj, GFP_KERNEL);
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add_uevent_var(envp, num_envp, cur_index, buffer, buffer_size,
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cur_len, "PHYSDEVPATH=%s", path);
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kfree(path);
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if (dev->bus)
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add_uevent_var(envp, num_envp, cur_index,
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buffer, buffer_size, cur_len,
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"PHYSDEVBUS=%s", dev->bus->name);
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if (dev->driver)
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add_uevent_var(envp, num_envp, cur_index,
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buffer, buffer_size, cur_len,
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"PHYSDEVDRIVER=%s", dev->driver->name);
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return 0;
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}
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static int make_deprecated_class_device_links(struct class_device *class_dev)
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{
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char *class_name;
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@ -430,11 +400,6 @@ static void remove_deprecated_class_device_links(struct class_device *class_dev)
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kfree(class_name);
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}
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#else
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static inline int deprecated_class_uevent(char **envp, int num_envp,
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int *cur_index, char *buffer,
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int buffer_size, int *cur_len,
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struct class_device *class_dev)
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{ return 0; }
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static inline int make_deprecated_class_device_links(struct class_device *cd)
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{ return 0; }
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static void remove_deprecated_class_device_links(struct class_device *cd)
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@ -445,15 +410,13 @@ static int class_uevent(struct kset *kset, struct kobject *kobj, char **envp,
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int num_envp, char *buffer, int buffer_size)
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{
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struct class_device *class_dev = to_class_dev(kobj);
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struct device *dev = class_dev->dev;
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int i = 0;
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int length = 0;
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int retval = 0;
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pr_debug("%s - name = %s\n", __FUNCTION__, class_dev->class_id);
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deprecated_class_uevent(envp, num_envp, &i, buffer, buffer_size,
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&length, class_dev);
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if (MAJOR(class_dev->devt)) {
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add_uevent_var(envp, num_envp, &i,
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buffer, buffer_size, &length,
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"MINOR=%u", MINOR(class_dev->devt));
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}
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if (dev) {
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const char *path = kobject_get_path(&dev->kobj, GFP_KERNEL);
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if (path) {
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add_uevent_var(envp, num_envp, &i,
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buffer, buffer_size, &length,
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"PHYSDEVPATH=%s", path);
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kfree(path);
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}
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if (dev->bus)
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add_uevent_var(envp, num_envp, &i,
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buffer, buffer_size, &length,
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"PHYSDEVBUS=%s", dev->bus->name);
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if (dev->driver)
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add_uevent_var(envp, num_envp, &i,
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buffer, buffer_size, &length,
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"PHYSDEVDRIVER=%s", dev->driver->name);
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}
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/* terminate, set to next free slot, shrink available space */
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envp[i] = NULL;
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envp = &envp[i];
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@ -180,10 +180,12 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj, char **envp,
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const char *path;
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path = kobject_get_path(&parent->kobj, GFP_KERNEL);
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add_uevent_var(envp, num_envp, &i,
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buffer, buffer_size, &length,
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"PHYSDEVPATH=%s", path);
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kfree(path);
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if (path) {
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add_uevent_var(envp, num_envp, &i,
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buffer, buffer_size, &length,
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"PHYSDEVPATH=%s", path);
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kfree(path);
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}
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add_uevent_var(envp, num_envp, &i,
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buffer, buffer_size, &length,
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@ -207,19 +207,6 @@ static int __device_attach(struct device_driver * drv, void * data)
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return driver_probe_device(drv, dev);
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}
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static int device_probe_drivers(void *data)
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{
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struct device *dev = data;
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int ret = 0;
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if (dev->bus) {
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down(&dev->sem);
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ret = bus_for_each_drv(dev->bus, NULL, dev, __device_attach);
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up(&dev->sem);
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}
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return ret;
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}
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/**
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* device_attach - try to attach device to a driver.
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* @dev: device.
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@ -1,7 +1,7 @@
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/*
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* firmware_class.c - Multi purpose firmware loading support
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*
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* Copyright (c) 2003 Manuel Estrada Sainz <ranty@debian.org>
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* Copyright (c) 2003 Manuel Estrada Sainz
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*
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* Please see Documentation/firmware_class/ for more information.
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*
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#define to_dev(obj) container_of(obj, struct device, kobj)
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MODULE_AUTHOR("Manuel Estrada Sainz <ranty@debian.org>");
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MODULE_AUTHOR("Manuel Estrada Sainz");
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MODULE_DESCRIPTION("Multi purpose firmware loading support");
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MODULE_LICENSE("GPL");
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@ -202,14 +202,14 @@ int kobject_shadow_add(struct kobject * kobj, struct dentry *shadow_parent)
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/* be noisy on error issues */
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if (error == -EEXIST)
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printk("kobject_add failed for %s with -EEXIST, "
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"don't try to register things with the "
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"same name in the same directory.\n",
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printk(KERN_ERR "kobject_add failed for %s with "
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"-EEXIST, don't try to register things with "
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"the same name in the same directory.\n",
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kobject_name(kobj));
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else
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printk("kobject_add failed for %s (%d)\n",
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printk(KERN_ERR "kobject_add failed for %s (%d)\n",
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kobject_name(kobj), error);
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dump_stack();
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dump_stack();
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}
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return error;
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