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V4L/DVB (6230): dvb-pll: add module option to force dvb-pll desc id (for debug use only)

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Add a module option to force the dvb-pll module to use an alternate dvb-pll
description without having to recompile the kernel.

Having a module option like this is useful in some cases, where the vendor
may release an alternate revision of the hardware using a different tuner,
but without changing the pci subsystem / usb device ids.

This option is intended for debugging purposes _only_.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Michael Krufky 2007-09-07 18:27:43 -03:00 committed by Mauro Carvalho Chehab
parent ff3e7dd580
commit 704e39bf62
1 changed files with 13 additions and 1 deletions
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14
drivers/media/dvb/frontends/dvb-pll.c
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@ -52,6 +52,11 @@ static unsigned int input[DVB_PLL_MAX] = { [ 0 ... (DVB_PLL_MAX-1) ] = 0 };
module_param_array(input, int, NULL, 0644);
MODULE_PARM_DESC(input,"specify rf input choice, 0 for autoselect (default)");
static unsigned int id[DVB_PLL_MAX] =
{ [ 0 ... (DVB_PLL_MAX-1) ] = DVB_PLL_UNDEFINED };
module_param_array(id, int, NULL, 0644);
MODULE_PARM_DESC(id, "force pll id to use (DEBUG ONLY)");
/* ----------------------------------------------------------- */
struct dvb_pll_desc {
@ -794,6 +799,10 @@ struct dvb_frontend *dvb_pll_attach(struct dvb_frontend *fe, int pll_addr,
int ret;
struct dvb_pll_desc *desc;
if ((id[dvb_pll_devcount] > DVB_PLL_UNDEFINED) &&
(id[dvb_pll_devcount] < ARRAY_SIZE(pll_list)))
pll_desc_id = id[dvb_pll_devcount];
BUG_ON(pll_desc_id < 1 || pll_desc_id >= ARRAY_SIZE(pll_list));
desc = pll_list[pll_desc_id];
@ -836,7 +845,10 @@ struct dvb_frontend *dvb_pll_attach(struct dvb_frontend *fe, int pll_addr,
printk("dvb-pll[%d]", priv->nr);
if (i2c != NULL)
printk(" %d-%04x", i2c_adapter_id(i2c), pll_addr);
printk(": id# %d (%s) attached\n", pll_desc_id, desc->name);
printk(": id# %d (%s) attached, %s\n", pll_desc_id, desc->name,
id[priv->nr] == pll_desc_id ?
"insmod option" : "autodetected");
}
return fe;