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author | Patrick Mochel <mochel@linux.intel.com> | 2006-12-07 12:56:38 (GMT) |
---|---|---|
committer | Len Brown <len.brown@intel.com> | 2006-12-16 04:38:34 (GMT) |
commit | f883d9db008deb20d4969c26475100cec2b7f6f8 (patch) | |
tree | 4d66f2bf9f0a6142685870177e26837fc510f9e1 /drivers/acpi/scan.c | |
parent | a7178df5e7e5730e5daa6cf6d8b8bf73adbe75c0 (diff) | |
download | linux-fsl-qoriq-f883d9db008deb20d4969c26475100cec2b7f6f8.tar.xz |
ACPI: convert to sysfs framework
Setup new sysfs framework
1. Remove /sys/firmware/acpi
2. Add ACPI device in device tree.
File "eject" for every device that has _EJ0 method is moved from
/sys/firmware to /sys/devices.
Operation on this file is exactly the same as before.
i.e. echo 1 to "eject" will cause hot removal of this device.
Corresponding changes should be made in userspace for hot removal.
Signed-off-by: Li Shaohua <shaohua.li@intel.com>
Signed-off-by: Zhang Rui<rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/scan.c')
-rw-r--r-- | drivers/acpi/scan.c | 187 |
1 files changed, 41 insertions, 146 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index b616e17..97f6bbd 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -24,126 +24,6 @@ static LIST_HEAD(acpi_device_list); DEFINE_SPINLOCK(acpi_device_lock); LIST_HEAD(acpi_wakeup_device_list); - -static void acpi_device_release_legacy(struct kobject *kobj) -{ - struct acpi_device *dev = container_of(kobj, struct acpi_device, kobj); - kfree(dev->pnp.cid_list); - kfree(dev); -} - -struct acpi_device_attribute { - struct attribute attr; - ssize_t(*show) (struct acpi_device *, char *); - ssize_t(*store) (struct acpi_device *, const char *, size_t); -}; - -typedef void acpi_device_sysfs_files(struct kobject *, - const struct attribute *); - -static void setup_sys_fs_device_files(struct acpi_device *dev, - acpi_device_sysfs_files * func); - -#define create_sysfs_device_files(dev) \ - setup_sys_fs_device_files(dev, (acpi_device_sysfs_files *)&sysfs_create_file) -#define remove_sysfs_device_files(dev) \ - setup_sys_fs_device_files(dev, (acpi_device_sysfs_files *)&sysfs_remove_file) - -#define to_acpi_dev(n) container_of(n, struct acpi_device, kobj) -#define to_handle_attr(n) container_of(n, struct acpi_device_attribute, attr); - -static ssize_t acpi_device_attr_show(struct kobject *kobj, - struct attribute *attr, char *buf) -{ - struct acpi_device *device = to_acpi_dev(kobj); - struct acpi_device_attribute *attribute = to_handle_attr(attr); - return attribute->show ? attribute->show(device, buf) : -EIO; -} -static ssize_t acpi_device_attr_store(struct kobject *kobj, - struct attribute *attr, const char *buf, - size_t len) -{ - struct acpi_device *device = to_acpi_dev(kobj); - struct acpi_device_attribute *attribute = to_handle_attr(attr); - return attribute->store ? attribute->store(device, buf, len) : -EIO; -} - -static struct sysfs_ops acpi_device_sysfs_ops = { - .show = acpi_device_attr_show, - .store = acpi_device_attr_store, -}; - -static struct kobj_type ktype_acpi_ns = { - .sysfs_ops = &acpi_device_sysfs_ops, - .release = acpi_device_release_legacy, -}; - -static int namespace_uevent(struct kset *kset, struct kobject *kobj, - char **envp, int num_envp, char *buffer, - int buffer_size) -{ - struct acpi_device *dev = to_acpi_dev(kobj); - int i = 0; - int len = 0; - - if (!dev->driver) - return 0; - - if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len, - "PHYSDEVDRIVER=%s", dev->driver->name)) - return -ENOMEM; - - envp[i] = NULL; - - return 0; -} - -static struct kset_uevent_ops namespace_uevent_ops = { - .uevent = &namespace_uevent, -}; - -static struct kset acpi_namespace_kset = { - .kobj = { - .name = "namespace", - }, - .subsys = &acpi_subsys, - .ktype = &ktype_acpi_ns, - .uevent_ops = &namespace_uevent_ops, -}; - -/* -------------------------------------------------------------------------- - ACPI sysfs device file support - -------------------------------------------------------------------------- */ -static ssize_t acpi_eject_store(struct acpi_device *device, - const char *buf, size_t count); - -#define ACPI_DEVICE_ATTR(_name,_mode,_show,_store) \ -static struct acpi_device_attribute acpi_device_attr_##_name = \ - __ATTR(_name, _mode, _show, _store) - -ACPI_DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); - -/** - * setup_sys_fs_device_files - sets up the device files under device namespace - * @dev: acpi_device object - * @func: function pointer to create or destroy the device file - */ -static void -setup_sys_fs_device_files(struct acpi_device *dev, - acpi_device_sysfs_files * func) -{ - acpi_status status; - acpi_handle temp = NULL; - - /* - * If device has _EJ0, 'eject' file is created that is used to trigger - * hot-removal function from userland. - */ - status = acpi_get_handle(dev->handle, "_EJ0", &temp); - if (ACPI_SUCCESS(status)) - (*(func)) (&dev->kobj, &acpi_device_attr_eject.attr); -} - static int acpi_eject_operation(acpi_handle handle, int lockable) { struct acpi_object_list arg_list; @@ -180,7 +60,8 @@ static int acpi_eject_operation(acpi_handle handle, int lockable) } static ssize_t -acpi_eject_store(struct acpi_device *device, const char *buf, size_t count) +acpi_eject_store(struct device *d, struct device_attribute *attr, + const char *buf, size_t count) { int result; int ret = count; @@ -188,26 +69,27 @@ acpi_eject_store(struct acpi_device *device, const char *buf, size_t count) acpi_status status; acpi_handle handle; acpi_object_type type = 0; + struct acpi_device *acpi_device = to_acpi_device(d); if ((!count) || (buf[0] != '1')) { return -EINVAL; } #ifndef FORCE_EJECT - if (device->driver == NULL) { + if (acpi_device->driver == NULL) { ret = -ENODEV; goto err; } #endif - status = acpi_get_type(device->handle, &type); - if (ACPI_FAILURE(status) || (!device->flags.ejectable)) { + status = acpi_get_type(acpi_device->handle, &type); + if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { ret = -ENODEV; goto err; } - islockable = device->flags.lockable; - handle = device->handle; + islockable = acpi_device->flags.lockable; + handle = acpi_device->handle; - result = acpi_bus_trim(device, 1); + result = acpi_bus_trim(acpi_device, 1); if (!result) result = acpi_eject_operation(handle, islockable); @@ -219,6 +101,35 @@ acpi_eject_store(struct acpi_device *device, const char *buf, size_t count) return ret; } +static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); + +static void acpi_device_setup_files(struct acpi_device *dev) +{ + acpi_status status; + acpi_handle temp; + + /* + * If device has _EJ0, 'eject' file is created that is used to trigger + * hot-removal function from userland. + */ + status = acpi_get_handle(dev->handle, "_EJ0", &temp); + if (ACPI_SUCCESS(status)) + device_create_file(&dev->dev, &dev_attr_eject); +} + +static void acpi_device_remove_files(struct acpi_device *dev) +{ + acpi_status status; + acpi_handle temp; + + /* + * If device has _EJ0, 'eject' file is created that is used to trigger + * hot-removal function from userland. + */ + status = acpi_get_handle(dev->handle, "_EJ0", &temp); + if (ACPI_SUCCESS(status)) + device_remove_file(&dev->dev, &dev_attr_eject); +} /* -------------------------------------------------------------------------- ACPI Bus operations -------------------------------------------------------------------------- */ @@ -353,8 +264,6 @@ static struct bus_type acpi_bus_type = { static void acpi_device_register(struct acpi_device *device, struct acpi_device *parent) { - int err; - /* * Linkage * ------- @@ -375,17 +284,6 @@ static void acpi_device_register(struct acpi_device *device, list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); spin_unlock(&acpi_device_lock); - strlcpy(device->kobj.name, device->pnp.bus_id, KOBJ_NAME_LEN); - if (parent) - device->kobj.parent = &parent->kobj; - device->kobj.ktype = &ktype_acpi_ns; - device->kobj.kset = &acpi_namespace_kset; - err = kobject_register(&device->kobj); - if (err < 0) - printk(KERN_WARNING "%s: kobject_register error: %d\n", - __FUNCTION__, err); - create_sysfs_device_files(device); - if (device->parent) device->dev.parent = &parent->dev; device->dev.bus = &acpi_bus_type; @@ -393,6 +291,8 @@ static void acpi_device_register(struct acpi_device *device, sprintf(device->dev.bus_id, "%s", device->pnp.bus_id); device->dev.release = &acpi_device_release; device_add(&device->dev); + + acpi_device_setup_files(device); } static void acpi_device_unregister(struct acpi_device *device, int type) @@ -409,9 +309,8 @@ static void acpi_device_unregister(struct acpi_device *device, int type) spin_unlock(&acpi_device_lock); acpi_detach_data(device->handle, acpi_bus_data_handler); - remove_sysfs_device_files(device); - kobject_unregister(&device->kobj); + acpi_device_remove_files(device); device_unregister(&device->dev); } @@ -1353,10 +1252,6 @@ static int __init acpi_scan_init(void) if (acpi_disabled) return 0; - result = kset_register(&acpi_namespace_kset); - if (result < 0) - printk(KERN_ERR PREFIX "kset_register error: %d\n", result); - result = bus_register(&acpi_bus_type); if (result) { /* We don't want to quit even if we failed to add suspend/resume */ |