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author | Pantelis Koukousoulas <pakt223@freemail.gr> | 2006-12-27 23:06:04 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-02-21 13:34:22 -0200 |
commit | 25d8527a441760c333c41ec7197ba0750780b371 (patch) | |
tree | 9c0904bf4c220e2fbcb821cf200c366af8b70cce /drivers/media/video/pvrusb2/pvrusb2-ctrl.c | |
parent | 275b2e283b139bee19e7de5929d01484b8e3ee51 (diff) |
V4L/DVB (5035): Pvrusb2: Enable radio mode round #2
This is the logic that:
a) Ensures /sys/class/pvrusb2/sn-*/ctl_frequency/{max,min}_val are
"automagically" reset to sane values on each mode change.
b) Allows tuning to a radio frequency by something like:
echo `perl -e "print int(94.9*16000 + 0.5)"` \
> /sys/class/pvrusb2/sn-*/ctl_input/cur_val
The trick was to take advantage of the already existing .get_{min,max}_value
function pointers in pvr2_ctrl, to "dynamically override" the hardcoded values
for min/max frequency at runtime.
For a moment I thought to dispose of the hardcoded MIN/MAX_FREQ and use the
hirange/lowrange fields of the v4l2_tuner struct instead, but then I see that
tuner-core.c kinda hardcodes these as well, so I decided to not bother.
Signed-off-by: Pantelis Koukousoulas <pakt223@freemail.gr>
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-ctrl.c')
0 files changed, 0 insertions, 0 deletions