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If the USB driver is enabled but the demodulator is not, we get a link error: ERROR: "zd1301_demod_get_dvb_frontend" [drivers/media/usb/dvb-usb-v2/zd1301.ko] undefined! ERROR: "zd1301_demod_get_i2c_adapter" [drivers/media/usb/dvb-usb-v2/zd1301.ko] undefined! Such a configuration obviously makes no sense, but we should not fail the build. This tries to mimic what we have for other drivers by turning the build failure into a runtime failure. Alternatively we could use an unconditional 'select' or 'depends on' to enforce a sane configuration. Fixes:47d65372b3("[media] zd1301_demod: ZyDAS ZD1301 DVB-T demodulator driver") Fixes:992b39872b("[media] zd1301: ZyDAS ZD1301 DVB USB interface driver") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/*
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* ZyDAS ZD1301 driver (demodulator)
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*
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* Copyright (C) 2015 Antti Palosaari <crope@iki.fi>
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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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#ifndef ZD1301_DEMOD_H
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#define ZD1301_DEMOD_H
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#include <linux/platform_device.h>
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#include <linux/dvb/frontend.h>
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#include "dvb_frontend.h"
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/**
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* struct zd1301_demod_platform_data - Platform data for the zd1301_demod driver
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* @reg_priv: First argument of reg_read and reg_write callbacks.
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* @reg_read: Register read callback.
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* @reg_write: Register write callback.
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*/
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struct zd1301_demod_platform_data {
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void *reg_priv;
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int (*reg_read)(void *, u16, u8 *);
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int (*reg_write)(void *, u16, u8);
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};
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#if IS_REACHABLE(CONFIG_DVB_ZD1301_DEMOD)
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/**
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* zd1301_demod_get_dvb_frontend() - Get pointer to DVB frontend
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* @pdev: Pointer to platform device
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*
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* Return: Pointer to DVB frontend which given platform device owns.
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*/
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struct dvb_frontend *zd1301_demod_get_dvb_frontend(struct platform_device *);
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/**
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* zd1301_demod_get_i2c_adapter() - Get pointer to I2C adapter
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* @pdev: Pointer to platform device
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*
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* Return: Pointer to I2C adapter which given platform device owns.
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*/
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struct i2c_adapter *zd1301_demod_get_i2c_adapter(struct platform_device *);
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#else
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static inline struct dvb_frontend *zd1301_demod_get_dvb_frontend(struct platform_device *dev)
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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 struct i2c_adapter *zd1301_demod_get_i2c_adapter(struct platform_device *dev)
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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 /* ZD1301_DEMOD_H */
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