01 - adds superio_locks -
drivers needing superio access register, and get a 'slot' with port-id
info and a mutex,multiple drivers share the same 'slot', and coordinate
access with its mutex.
superio_find() - finds and reserves the slot, returned as ptr or null
superio_release() - relinguishes the slot (ref-counted)
Once theyve got the reservation in struct superio * gate (as done in
patches 2,3,4) they *may* use
superio_lock(gate)
superio_inb(gate, addr),
superio_outb(gate, addr, val)
Signed-off-by: Jim Cromie <jim.cromie at gmail.com>
---
[jimc at harpo mylocks]$ diffstat diff.locks-superio
drivers/hwmon/Kconfig | 10 ++
drivers/hwmon/Makefile | 1
drivers/hwmon/superio_locks.c | 210
++++++++++++++++++++++++++++++++++++++++++
include/linux/superio-locks.h | 71 ++++++++++++++
4 files changed, 292 insertions(+)
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