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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>
119 lines
3.1 KiB
C
119 lines
3.1 KiB
C
/*
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* Afatech AF9013 demodulator driver
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*
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* Copyright (C) 2007 Antti Palosaari <crope@iki.fi>
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* Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
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*
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* Thanks to Afatech who kindly provided information.
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*
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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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*
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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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*
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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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*/
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#ifndef AF9013_H
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#define AF9013_H
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#include <linux/kconfig.h>
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#include <linux/dvb/frontend.h>
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/* AF9013/5 GPIOs (mostly guessed)
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demod#1-gpio#0 - set demod#2 i2c-addr for dual devices
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demod#1-gpio#1 - xtal setting (?)
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demod#1-gpio#3 - tuner#1
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demod#2-gpio#0 - tuner#2
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demod#2-gpio#1 - xtal setting (?)
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*/
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struct af9013_config {
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/*
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* I2C address
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*/
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u8 i2c_addr;
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/*
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* clock
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* 20480000, 25000000, 28000000, 28800000
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*/
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u32 clock;
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/*
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* tuner
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*/
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#define AF9013_TUNER_MXL5003D 3 /* MaxLinear */
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#define AF9013_TUNER_MXL5005D 13 /* MaxLinear */
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#define AF9013_TUNER_MXL5005R 30 /* MaxLinear */
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#define AF9013_TUNER_ENV77H11D5 129 /* Panasonic */
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#define AF9013_TUNER_MT2060 130 /* Microtune */
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#define AF9013_TUNER_MC44S803 133 /* Freescale */
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#define AF9013_TUNER_QT1010 134 /* Quantek */
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#define AF9013_TUNER_UNKNOWN 140 /* for can tuners ? */
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#define AF9013_TUNER_MT2060_2 147 /* Microtune */
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#define AF9013_TUNER_TDA18271 156 /* NXP */
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#define AF9013_TUNER_QT1010A 162 /* Quantek */
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#define AF9013_TUNER_MXL5007T 177 /* MaxLinear */
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#define AF9013_TUNER_TDA18218 179 /* NXP */
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u8 tuner;
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/*
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* IF frequency
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*/
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u32 if_frequency;
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/*
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* TS settings
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*/
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#define AF9013_TS_USB 0
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#define AF9013_TS_PARALLEL 1
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#define AF9013_TS_SERIAL 2
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u8 ts_mode:2;
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/*
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* input spectrum inversion
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*/
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bool spec_inv;
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/*
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* firmware API version
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*/
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u8 api_version[4];
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/*
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* GPIOs
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*/
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#define AF9013_GPIO_ON (1 << 0)
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#define AF9013_GPIO_EN (1 << 1)
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#define AF9013_GPIO_O (1 << 2)
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#define AF9013_GPIO_I (1 << 3)
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#define AF9013_GPIO_LO (AF9013_GPIO_ON|AF9013_GPIO_EN)
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#define AF9013_GPIO_HI (AF9013_GPIO_ON|AF9013_GPIO_EN|AF9013_GPIO_O)
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#define AF9013_GPIO_TUNER_ON (AF9013_GPIO_ON|AF9013_GPIO_EN)
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#define AF9013_GPIO_TUNER_OFF (AF9013_GPIO_ON|AF9013_GPIO_EN|AF9013_GPIO_O)
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u8 gpio[4];
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};
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#if IS_REACHABLE(CONFIG_DVB_AF9013)
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extern struct dvb_frontend *af9013_attach(const struct af9013_config *config,
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struct i2c_adapter *i2c);
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#else
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static inline struct dvb_frontend *af9013_attach(
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const struct af9013_config *config, struct i2c_adapter *i2c)
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{
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pr_warn("%s: driver disabled by Kconfig\n", __func__);
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return NULL;
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}
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#endif /* CONFIG_DVB_AF9013 */
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#endif /* AF9013_H */
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