9b174527e7
In the media drivers, the v4l2 core knows about all submodules and calls into them from a common function. However this cannot work if the modules that get called are loadable and the core is built-in. In that case we get drivers/built-in.o: In function `set_type': drivers/media/v4l2-core/tuner-core.c:301: undefined reference to `tea5767_attach' drivers/media/v4l2-core/tuner-core.c:307: undefined reference to `tea5761_attach' drivers/media/v4l2-core/tuner-core.c:349: undefined reference to `tda9887_attach' drivers/media/v4l2-core/tuner-core.c:405: undefined reference to `xc4000_attach' This was working previously, until the IS_ENABLED() macro was used to replace the construct like #if defined(CONFIG_DVB_CX24110) || (defined(CONFIG_DVB_CX24110_MODULE) && defined(MODULE)) with the difference that the new code no longer checks whether it is being built as a loadable module itself. To fix this, this new patch adds an 'IS_REACHABLE' macro, which evaluates true in exactly the condition that was used previously. The downside of this is that this trades an obvious link error for a more subtle runtime failure, but it is clear that the change that introduced the link error was unintentional and it seems better to revert it for now. Also, a similar change was originally created by Trent Piepho and then reverted by teh change to the IS_ENABLED macro. Ideally Kconfig would be used to avoid the case of a broken dependency, or the code restructured in a way to turn around the dependency, but either way would require much larger changes here. Fixes:7b34be71db("[media] use IS_ENABLED() macro") See-also:c5dec9fb24("V4L/DVB (4751): Fix DBV_FE_CUSTOMISE for card drivers compiled into kernel") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
67 lines
2 KiB
C
67 lines
2 KiB
C
/*
|
|
* Support for LGDT3302 and LGDT3303 - VSB/QAM
|
|
*
|
|
* Copyright (C) 2005 Wilson Michaels <wilsonmichaels@earthlink.net>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
*/
|
|
|
|
#ifndef LGDT330X_H
|
|
#define LGDT330X_H
|
|
|
|
#include <linux/dvb/frontend.h>
|
|
|
|
typedef enum lg_chip_t {
|
|
UNDEFINED,
|
|
LGDT3302,
|
|
LGDT3303
|
|
}lg_chip_type;
|
|
|
|
struct lgdt330x_config
|
|
{
|
|
/* The demodulator's i2c address */
|
|
u8 demod_address;
|
|
|
|
/* LG demodulator chip LGDT3302 or LGDT3303 */
|
|
lg_chip_type demod_chip;
|
|
|
|
/* MPEG hardware interface - 0:parallel 1:serial */
|
|
int serial_mpeg;
|
|
|
|
/* PLL interface */
|
|
int (*pll_rf_set) (struct dvb_frontend* fe, int index);
|
|
|
|
/* Need to set device param for start_dma */
|
|
int (*set_ts_params)(struct dvb_frontend* fe, int is_punctured);
|
|
|
|
/* Flip the polarity of the mpeg data transfer clock using alternate init data
|
|
* This option applies ONLY to LGDT3303 - 0:disabled (default) 1:enabled */
|
|
int clock_polarity_flip;
|
|
};
|
|
|
|
#if IS_REACHABLE(CONFIG_DVB_LGDT330X)
|
|
extern struct dvb_frontend* lgdt330x_attach(const struct lgdt330x_config* config,
|
|
struct i2c_adapter* i2c);
|
|
#else
|
|
static inline struct dvb_frontend* lgdt330x_attach(const struct lgdt330x_config* config,
|
|
struct i2c_adapter* i2c)
|
|
{
|
|
printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
|
|
return NULL;
|
|
}
|
|
#endif // CONFIG_DVB_LGDT330X
|
|
|
|
#endif /* LGDT330X_H */
|