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ide: add warm-plug support for IDE devices (take 2)

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* Add 'struct class ide_port_class' ('ide_port' class) and a 'struct
  device *portdev' ('ide_port' class device) in ide_hwif_t.

* Register 'ide_port' class in ide_init() and unregister it in
  cleanup_module().

* Create ->portdev in ide_register_port () and unregister it in
  ide_unregister().

* Add "delete_devices" class device attribute for unregistering IDE devices
  on a port and "scan" one for probing+registering IDE devices on a port.

* Add ide_sysfs_register_port() helper for registering "delete_devices"
  and "scan" attributes with ->portdev.  Call it in ide_device_add_all().

* Document IDE warm-plug support in Documentation/ide/warm-plug-howto.txt.

v2:
* Convert patch from using 'struct class_device' to use 'struct device'.
  (thanks to Kay Sievers for doing it)

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz
2008-04-18 00:46:23 +02:00
parent 50672e5d74
commit f74c91413e
4 changed files with 110 additions and 3 deletions
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5
include/linux/ide.h
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@@ -579,7 +579,9 @@ typedef struct hwif_s {
unsigned mmio : 1; /* host uses MMIO */
unsigned straight8 : 1; /* Alan's straight 8 check */
struct device gendev;
struct device gendev;
struct device *portdev;
struct completion gendev_rel_comp; /* To deal with device release() */
void *hwif_data; /* extra hwif data */
@@ -1275,6 +1277,7 @@ extern struct mutex ide_cfg_mtx;
#define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
extern struct bus_type ide_bus_type;
extern struct class *ide_port_class;
/* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
#define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)