disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/sound/soc/codecs/rt5677-spi.h
..
..
@@ -1,19 +1,33 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * rt5677-spi.h  --  RT5677 ALSA SoC audio codec driver
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  *
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  * Copyright 2013 Realtek Semiconductor Corp.
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  * Author: Oder Chiou <oder_chiou@realtek.com>
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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 version 2 as
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- * published by the Free Software Foundation.
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  */
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 #ifndef __RT5677_SPI_H__
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 #define __RT5677_SPI_H__
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+#if IS_ENABLED(CONFIG_SND_SOC_RT5677_SPI)
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 int rt5677_spi_read(u32 addr, void *rxbuf, size_t len);
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 int rt5677_spi_write(u32 addr, const void *txbuf, size_t len);
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 int rt5677_spi_write_firmware(u32 addr, const struct firmware *fw);
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+void rt5677_spi_hotword_detected(void);
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+#else
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+static inline int rt5677_spi_read(u32 addr, void *rxbuf, size_t len)
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+{
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+	return -EINVAL;
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+}
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+static inline int rt5677_spi_write(u32 addr, const void *txbuf, size_t len)
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+{
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+	return -EINVAL;
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+}
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+static inline int rt5677_spi_write_firmware(u32 addr, const struct firmware *fw)
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+{
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+	return -EINVAL;
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+}
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+static inline void rt5677_spi_hotword_detected(void){}
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+#endif
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 #endif /* __RT5677_SPI_H__ */