LXR linux/drivers/media/dvb-frontends/si21xx.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef SI21XX_H
   3#define SI21XX_H
   4
   5#include <linux/dvb/frontend.h>
   6#include <media/dvb_frontend.h>
   7
   8struct si21xx_config {
   9        /* the demodulator's i2c address */
  10        u8 demod_address;
  11
  12        /* minimum delay before retuning */
  13        int min_delay_ms;
  14};
  15
  16#if IS_REACHABLE(CONFIG_DVB_SI21XX)
  17extern struct dvb_frontend *si21xx_attach(const struct si21xx_config *config,
  18                                                struct i2c_adapter *i2c);
  19#else
  20static inline struct dvb_frontend *si21xx_attach(
  21                const struct si21xx_config *config, struct i2c_adapter *i2c)
  22{
  23        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  24        return NULL;
  25}
  26#endif
  27
  28static inline int si21xx_writeregister(struct dvb_frontend *fe, u8 reg, u8 val)
  29{
  30        int r = 0;
  31        u8 buf[] = {reg, val};
  32        if (fe->ops.write)
  33                r = fe->ops.write(fe, buf, 2);
  34        return r;
  35}
  36
  37#endif
  38