path: root/drivers/w1
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authorHannes Reinecke <hare@suse.de>2005-06-28 17:30:38 -0700
committerJeff Garzik <jgarzik@pobox.com>2005-09-08 05:57:23 -0400
commit6a690df5c8b37d4a1c41df40770d42d44fac0e97 (patch)
tree1679862bdfa0e129f4d0feb18b02e7692db3afa3 /drivers/w1
parent5a2cec83a9bb1b4295aa8ab728fcb8ca1811a33c (diff)
[PATCH] scan all enabled ports on ata_piix
ICH6 spec defines the PORT_ bits as: PORT_ENABLED (R/W): 0 = Disabled. The port is in the off state and cannot detect any devices. 1 = Enabled. The port can transition between the on, partial, and slumber states and can detect devices. PORT_PRESENT (R/O) The status of this bit may change at any time. This bit is cleared when the port is disabled via PORT_ENABLED. This bit is not cleared upon surprise removal of a device. So from a textual view it is not necessary that PORT_PRESENT _must_ be set, especially if a device detection has to be done anyway. And, in fact, this is the view that ACER has been taken with its new Laptops (e.g. Travelmate 4150). And the definition of PORT_ENABLED / PORT_PRESENT is mixed up, btw. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Jens Axboe <axboe@suse.de> Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/w1')
0 files changed, 0 insertions, 0 deletions

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