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ACPI: bay: make bay a platform driver 

Convert the bay driver to be a platform driver, so that we can have
sysfs entries.

Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Kristen Carlson Accardi 2006-12-18 18:07:00 -05:00 committed by Len Brown
parent e9dd85e5bd
commit 2b167c0119
1 changed files with 76 additions and 11 deletions
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87
drivers/acpi/bay.c
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@ -30,6 +30,7 @@
#include <acpi/acpi_drivers.h>
#include <linux/seq_file.h>
#include <asm/uaccess.h>
#include <linux/platform_device.h>
#define ACPI_BAY_DRIVER_NAME "ACPI Removable Drive Bay Driver"
@ -45,7 +46,6 @@ MODULE_LICENSE("GPL");
struct acpi_buffer buffer = {sizeof(prefix), prefix};\
acpi_get_name(h, ACPI_FULL_PATHNAME, &buffer);\
printk(KERN_DEBUG PREFIX "%s: %s\n", prefix, s); }
static void bay_notify(acpi_handle handle, u32 event, void *data);
static int acpi_bay_add(struct acpi_device *device);
static int acpi_bay_remove(struct acpi_device *device, int type);
@ -66,6 +66,7 @@ struct bay {
acpi_handle handle;
char *name;
struct list_head list;
struct platform_device *pdev;
};
LIST_HEAD(drive_bays);
@ -133,6 +134,33 @@ static void eject_device(acpi_handle handle)
pr_debug("Failed to evaluate _EJ0!\n");
}
/*
* show_present - read method for "present" file in sysfs
*/
static ssize_t show_present(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct bay *bay = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE, "%d\n", bay_present(bay));
}
DEVICE_ATTR(present, S_IRUGO, show_present, NULL);
/*
* write_eject - write method for "eject" file in sysfs
*/
static ssize_t write_eject(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct bay *bay = dev_get_drvdata(dev);
if (!count)
return -EINVAL;
eject_device(bay->handle);
return count;
}
DEVICE_ATTR(eject, S_IWUSR, NULL, write_eject);
/**
* is_ata - see if a device is an ata device
@ -218,14 +246,31 @@ static int acpi_bay_add(struct acpi_device *device)
static int acpi_bay_add_fs(struct bay *bay)
{
if (!bay)
return -EINVAL;
int ret;
struct device *dev = &bay->pdev->dev;
ret = device_create_file(dev, &dev_attr_present);
if (ret)
goto add_fs_err;
ret = device_create_file(dev, &dev_attr_eject);
if (ret) {
device_remove_file(dev, &dev_attr_present);
goto add_fs_err;
}
return 0;
add_fs_err:
bay_dprintk(bay->handle, "Error adding sysfs files\n");
return ret;
}
static void acpi_bay_remove_fs(struct bay *bay)
{
if (!bay)
return;
struct device *dev = &bay->pdev->dev;
/* cleanup sysfs */
device_remove_file(dev, &dev_attr_present);
device_remove_file(dev, &dev_attr_eject);
}
static int bay_is_dock_device(acpi_handle handle)
@ -240,10 +285,11 @@ static int bay_is_dock_device(acpi_handle handle)
return (is_dock_device(handle) || is_dock_device(parent));
}
static int bay_add(acpi_handle handle)
static int bay_add(acpi_handle handle, int id)
{
acpi_status status;
struct bay *new_bay;
struct platform_device *pdev;
struct acpi_buffer nbuffer = {ACPI_ALLOCATE_BUFFER, NULL};
acpi_get_name(handle, ACPI_FULL_PATHNAME, &nbuffer);
@ -252,12 +298,24 @@ static int bay_add(acpi_handle handle)
/*
* Initialize bay device structure
*/
new_bay = kmalloc(GFP_ATOMIC, sizeof(*new_bay));
new_bay = kzalloc(GFP_ATOMIC, sizeof(*new_bay));
INIT_LIST_HEAD(&new_bay->list);
new_bay->handle = handle;
new_bay->name = (char *)nbuffer.pointer;
list_add(&new_bay->list, &drive_bays);
acpi_bay_add_fs(new_bay);
/* initialize platform device stuff */
pdev = platform_device_register_simple(ACPI_BAY_CLASS, id, NULL, 0);
if (pdev == NULL) {
printk(KERN_ERR PREFIX "Error registering bay device\n");
goto bay_add_err;
}
new_bay->pdev = pdev;
platform_set_drvdata(pdev, new_bay);
if (acpi_bay_add_fs(new_bay)) {
platform_device_unregister(new_bay->pdev);
goto bay_add_err;
}
/* register for events on this device */
status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
@ -273,8 +331,14 @@ static int bay_add(acpi_handle handle)
bay_dprintk(handle, "Is dependent on dock\n");
register_hotplug_dock_device(handle, bay_notify, new_bay);
}
list_add(&new_bay->list, &drive_bays);
printk(KERN_INFO PREFIX "Bay [%s] Added\n", new_bay->name);
return 0;
bay_add_err:
kfree(new_bay->name);
kfree(new_bay);
return -ENODEV;
}
static int acpi_bay_remove(struct acpi_device *device, int type)
@ -393,8 +457,8 @@ find_bay(acpi_handle handle, u32 lvl, void *context, void **rv)
*/
if (is_ejectable_bay(handle)) {
bay_dprintk(handle, "found ejectable bay");
bay_add(handle);
(*count)++;
if (!bay_add(handle, *count))
(*count)++;
}
return AE_OK;
}
@ -429,6 +493,7 @@ static void __exit bay_exit(void)
acpi_bay_remove_fs(bay);
acpi_remove_notify_handler(bay->handle, ACPI_SYSTEM_NOTIFY,
bay_notify);
platform_device_unregister(bay->pdev);
kfree(bay->name);
kfree(bay);
}