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authorDevin Heitmueller <dheitmueller@kernellabs.com>2009-04-28 13:53:38 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-06-16 18:21:06 -0300
commitb6bd5eb871184dd976ce2d410888b2a29d90371a (patch)
tree77d02b7e639451e63178695013bbae27706cbdca /drivers/media/common
parent34a0db9202414c42763a437f9937cd8692263170 (diff)
V4L/DVB (11798): xc5000: add "no_poweroff" module option
Provide for the ability for a user to disable putting the tuner to sleep, in case he doesn't want to incur the cost of reloading the firmware when starting up his/her application. The module options are intentionally identical to xc3028. Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/common')
-rw-r--r--drivers/media/common/tuners/xc5000.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/media/common/tuners/xc5000.c b/drivers/media/common/tuners/xc5000.c
index efc43123952..bc294b9eb48 100644
--- a/drivers/media/common/tuners/xc5000.c
+++ b/drivers/media/common/tuners/xc5000.c
@@ -36,6 +36,12 @@ static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
+static int no_poweroff;
+module_param(no_poweroff, int, 0644);
+MODULE_PARM_DESC(no_poweroff, "0 (default) powers device off when not used.\n"
+ "\t\t1 keep device energized and with tuner ready all the times.\n"
+ "\t\tFaster, but consumes more power and keeps the device hotter");
+
static DEFINE_MUTEX(xc5000_list_mutex);
static LIST_HEAD(hybrid_tuner_instance_list);
@@ -857,6 +863,10 @@ static int xc5000_sleep(struct dvb_frontend *fe)
dprintk(1, "%s()\n", __func__);
+ /* Avoid firmware reload on slow devices */
+ if (no_poweroff)
+ return 0;
+
/* According to Xceive technical support, the "powerdown" register
was removed in newer versions of the firmware. The "supported"
way to sleep the tuner is to pull the reset pin low for 10ms */