V4L/DVB (4876): budget-ci IR: support EVIOCGPHYS

This patch adds a 'phys' string, of the same form as used by various other
DVB cards' IR drivers, for access by any program which uses the EVIOCPHYS
ioctl or may read /sys/class/input/*/phys (e.g. udev) to identify input
device nodes.
Taken from Darren Salt's dvb-ir patchset.

Signed-off-by: Darren Salt <linux@youmustbejoking.demon.co.uk>
Signed-off-by: David Hardeman <david@hardeman.nu>
Signed-off-by: Andrew de Quincey <adq_dvb@lidskialf.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/dvb/ttpci/budget-ci.c

@@ -76,6 +76,7 @@ struct budget_ci_ir {
 	struct input_dev *dev;
 	struct tasklet_struct msp430_irq_tasklet;
 	char name[72]; /* 40 + 32 for (struct saa7146_dev).name */
+	char phys[32];
 };
 
 struct budget_ci {
@@ -205,8 +206,27 @@ static int msp430_ir_init(struct budget_ci *budget_ci)
 
 	snprintf(budget_ci->ir.name, sizeof(budget_ci->ir.name),
 		 "Budget-CI dvb ir receiver %s", saa->name);
+	snprintf(budget_ci->ir.phys, sizeof(budget_ci->ir.phys),
+		 "pci-%s/ir0", pci_name(saa->pci));
+
 	input_dev->name = budget_ci->ir.name;
 
+	input_dev->phys = budget_ci->ir.phys;
+	input_dev->id.bustype = BUS_PCI;
+	input_dev->id.version = 1;
+	if (saa->pci->subsystem_vendor) {
+		input_dev->id.vendor = saa->pci->subsystem_vendor;
+		input_dev->id.product = saa->pci->subsystem_device;
+	} else {
+		input_dev->id.vendor = saa->pci->vendor;
+		input_dev->id.product = saa->pci->device;
+	}
+# if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
+	input_dev->cdev.dev = &saa->pci->dev;
+# else
+	input_dev->dev = &saa->pci->dev;
+# endif
+
 	set_bit(EV_KEY, input_dev->evbit);
 	for (i = 0; i < ARRAY_SIZE(key_map); i++)
 		if (key_map[i])