forked from Minki/linux
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>
116 lines
2.9 KiB
C
116 lines
2.9 KiB
C
/*
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STB6100 Silicon Tuner
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Copyright (C) Manu Abraham (abraham.manu@gmail.com)
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Copyright (C) ST Microelectronics
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __STB_6100_REG_H
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#define __STB_6100_REG_H
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#include <linux/dvb/frontend.h>
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#include "dvb_frontend.h"
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#define STB6100_LD 0x00
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#define STB6100_LD_LOCK (1 << 0)
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#define STB6100_VCO 0x01
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#define STB6100_VCO_OSCH (0x01 << 7)
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#define STB6100_VCO_OSCH_SHIFT 7
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#define STB6100_VCO_OCK (0x03 << 5)
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#define STB6100_VCO_OCK_SHIFT 5
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#define STB6100_VCO_ODIV (0x01 << 4)
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#define STB6100_VCO_ODIV_SHIFT 4
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#define STB6100_VCO_OSM (0x0f << 0)
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#define STB6100_NI 0x02
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#define STB6100_NF_LSB 0x03
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#define STB6100_K 0x04
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#define STB6100_K_PSD2 (0x01 << 2)
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#define STB6100_K_PSD2_SHIFT 2
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#define STB6100_K_NF_MSB (0x03 << 0)
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#define STB6100_G 0x05
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#define STB6100_G_G (0x0f << 0)
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#define STB6100_G_GCT (0x07 << 5)
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#define STB6100_F 0x06
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#define STB6100_F_F (0x1f << 0)
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#define STB6100_DLB 0x07
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#define STB6100_TEST1 0x08
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#define STB6100_FCCK 0x09
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#define STB6100_FCCK_FCCK (0x01 << 6)
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#define STB6100_LPEN 0x0a
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#define STB6100_LPEN_LPEN (0x01 << 4)
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#define STB6100_LPEN_SYNP (0x01 << 5)
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#define STB6100_LPEN_OSCP (0x01 << 6)
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#define STB6100_LPEN_BEN (0x01 << 7)
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#define STB6100_TEST3 0x0b
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#define STB6100_NUMREGS 0x0c
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#define INRANGE(val, x, y) (((x <= val) && (val <= y)) || \
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((y <= val) && (val <= x)) ? 1 : 0)
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#define CHKRANGE(val, x, y) (((val >= x) && (val < y)) ? 1 : 0)
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struct stb6100_config {
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u8 tuner_address;
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u32 refclock;
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};
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struct stb6100_state {
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struct i2c_adapter *i2c;
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const struct stb6100_config *config;
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struct dvb_tuner_ops ops;
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struct dvb_frontend *frontend;
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struct tuner_state status;
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u32 frequency;
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u32 srate;
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u32 bandwidth;
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u32 reference;
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};
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#if IS_REACHABLE(CONFIG_DVB_STB6100)
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extern struct dvb_frontend *stb6100_attach(struct dvb_frontend *fe,
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const struct stb6100_config *config,
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struct i2c_adapter *i2c);
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#else
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static inline struct dvb_frontend *stb6100_attach(struct dvb_frontend *fe,
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const struct stb6100_config *config,
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struct i2c_adapter *i2c)
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{
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printk(KERN_WARNING "%s: Driver disabled by Kconfig\n", __func__);
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return NULL;
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}
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#endif //CONFIG_DVB_STB6100
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#endif
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