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>
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
#ifndef DIB7000M_H
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#define DIB7000M_H
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#include <linux/kconfig.h>
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#include "dibx000_common.h"
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struct dib7000m_config {
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u8 dvbt_mode;
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u8 output_mpeg2_in_188_bytes;
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u8 hostbus_diversity;
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u8 tuner_is_baseband;
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u8 mobile_mode;
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int (*update_lna) (struct dvb_frontend *, u16 agc_global);
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u8 agc_config_count;
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struct dibx000_agc_config *agc;
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struct dibx000_bandwidth_config *bw;
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#define DIB7000M_GPIO_DEFAULT_DIRECTIONS 0xffff
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u16 gpio_dir;
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#define DIB7000M_GPIO_DEFAULT_VALUES 0x0000
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u16 gpio_val;
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#define DIB7000M_GPIO_PWM_POS0(v) ((v & 0xf) << 12)
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#define DIB7000M_GPIO_PWM_POS1(v) ((v & 0xf) << 8 )
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#define DIB7000M_GPIO_PWM_POS2(v) ((v & 0xf) << 4 )
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#define DIB7000M_GPIO_PWM_POS3(v) (v & 0xf)
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#define DIB7000M_GPIO_DEFAULT_PWM_POS 0xffff
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u16 gpio_pwm_pos;
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u16 pwm_freq_div;
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u8 quartz_direct;
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u8 input_clk_is_div_2;
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int (*agc_control) (struct dvb_frontend *, u8 before);
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};
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#define DEFAULT_DIB7000M_I2C_ADDRESS 18
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#if IS_REACHABLE(CONFIG_DVB_DIB7000M)
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extern struct dvb_frontend *dib7000m_attach(struct i2c_adapter *i2c_adap,
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u8 i2c_addr,
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struct dib7000m_config *cfg);
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extern struct i2c_adapter *dib7000m_get_i2c_master(struct dvb_frontend *,
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enum dibx000_i2c_interface,
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int);
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extern int dib7000m_pid_filter(struct dvb_frontend *, u8 id, u16 pid, u8 onoff);
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extern int dib7000m_pid_filter_ctrl(struct dvb_frontend *fe, u8 onoff);
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#else
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static inline
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struct dvb_frontend *dib7000m_attach(struct i2c_adapter *i2c_adap,
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u8 i2c_addr, struct dib7000m_config *cfg)
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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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static inline
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struct i2c_adapter *dib7000m_get_i2c_master(struct dvb_frontend *demod,
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enum dibx000_i2c_interface intf,
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int gating)
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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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static inline int dib7000m_pid_filter(struct dvb_frontend *fe, u8 id,
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u16 pid, u8 onoff)
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{
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printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
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return -ENODEV;
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}
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static inline int dib7000m_pid_filter_ctrl(struct dvb_frontend *fe,
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uint8_t onoff)
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{
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printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
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return -ENODEV;
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}
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#endif
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/* TODO
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extern INT dib7000m_set_gpio(struct dibDemod *demod, UCHAR num, UCHAR dir, UCHAR val);
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extern INT dib7000m_enable_vbg_voltage(struct dibDemod *demod);
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extern void dib7000m_set_hostbus_diversity(struct dibDemod *demod, UCHAR onoff);
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extern USHORT dib7000m_get_current_agc_global(struct dibDemod *demod);
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*/
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#endif
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