V4L/DVB: cx88: Let the user disable IR support

It might be useful to be able to disable the IR support, either for
debugging purposes, or just for users who know they won't use the IR
remote control anyway. On many cards, IR support requires expensive
polling/sampling which is better avoided if never needed.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx88/cx88-cards.c

@@ -45,6 +45,10 @@ static unsigned int latency = UNSET;
 module_param(latency,int,0444);
 MODULE_PARM_DESC(latency,"pci latency timer");
 
+static int disable_ir;
+module_param(disable_ir, int, 0444);
+MODULE_PARM_DESC(latency, "Disable IR support");
+
 #define info_printk(core, fmt, arg...) \
 	printk(KERN_INFO "%s: " fmt, core->name , ## arg)
 
@@ -3498,8 +3502,10 @@ struct cx88_core *cx88_core_create(struct pci_dev *pci, int nr)
 	}
 
 	cx88_card_setup(core);
-	cx88_i2c_init_ir(core);
-	cx88_ir_init(core, pci);
+	if (!disable_ir) {
+		cx88_i2c_init_ir(core);
+		cx88_ir_init(core, pci);
+	}
 
 	return core;
 }