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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>
77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
#ifndef DIB8000_H
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#define DIB8000_H
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#include "dibx000_common.h"
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struct dib8000_config {
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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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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 *pll;
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#define DIB8000_GPIO_DEFAULT_DIRECTIONS 0xffff
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u16 gpio_dir;
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#define DIB8000_GPIO_DEFAULT_VALUES 0x0000
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u16 gpio_val;
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#define DIB8000_GPIO_PWM_POS0(v) ((v & 0xf) << 12)
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#define DIB8000_GPIO_PWM_POS1(v) ((v & 0xf) << 8 )
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#define DIB8000_GPIO_PWM_POS2(v) ((v & 0xf) << 4 )
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#define DIB8000_GPIO_PWM_POS3(v) (v & 0xf)
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#define DIB8000_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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void (*agc_control) (struct dvb_frontend *, u8 before);
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u16 drives;
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u16 diversity_delay;
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u8 div_cfg;
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u8 output_mode;
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u8 refclksel;
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u8 enMpegOutput:1;
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struct dibx000_bandwidth_config *plltable;
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};
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#define DEFAULT_DIB8000_I2C_ADDRESS 18
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struct dib8000_ops {
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int (*set_wbd_ref)(struct dvb_frontend *fe, u16 value);
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int (*update_pll)(struct dvb_frontend *fe,
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struct dibx000_bandwidth_config *pll, u32 bw, u8 ratio);
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int (*set_gpio)(struct dvb_frontend *fe, u8 num, u8 dir, u8 val);
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void (*pwm_agc_reset)(struct dvb_frontend *fe);
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struct i2c_adapter *(*get_i2c_tuner)(struct dvb_frontend *fe);
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int (*tuner_sleep)(struct dvb_frontend *fe, int onoff);
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s32 (*get_adc_power)(struct dvb_frontend *fe, u8 mode);
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int (*get_dc_power)(struct dvb_frontend *fe, u8 IQ);
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u32 (*ctrl_timf)(struct dvb_frontend *fe, uint8_t op, uint32_t timf);
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enum frontend_tune_state (*get_tune_state)(struct dvb_frontend *fe);
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int (*set_tune_state)(struct dvb_frontend *fe, enum frontend_tune_state tune_state);
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int (*set_slave_frontend)(struct dvb_frontend *fe, struct dvb_frontend *fe_slave);
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int (*remove_slave_frontend)(struct dvb_frontend *fe);
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struct dvb_frontend *(*get_slave_frontend)(struct dvb_frontend *fe, int slave_index);
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int (*i2c_enumeration)(struct i2c_adapter *host, int no_of_demods,
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u8 default_addr, u8 first_addr, u8 is_dib8096p);
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struct i2c_adapter *(*get_i2c_master)(struct dvb_frontend *fe, enum dibx000_i2c_interface intf, int gating);
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int (*pid_filter_ctrl)(struct dvb_frontend *fe, u8 onoff);
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int (*pid_filter)(struct dvb_frontend *fe, u8 id, u16 pid, u8 onoff);
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struct dvb_frontend *(*init)(struct i2c_adapter *i2c_adap, u8 i2c_addr, struct dib8000_config *cfg);
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};
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#if IS_REACHABLE(CONFIG_DVB_DIB8000)
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void *dib8000_attach(struct dib8000_ops *ops);
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#else
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static inline int dib8000_attach(struct dib8000_ops *ops)
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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
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#endif
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