ASoC: sprd: Allow the MCDT driver to build into modules

Change the config to 'tristate' for MCDT driver to allow it to build into
modules, as well as changing to use IS_ENABLED() to validate if need supply
dummy functions when building the MCDT driver as a module.

Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
Link: https://lore.kernel.org/r/9306f2b99641136653ae4fe6cf9e859b7f698f77.1583387748.git.baolin.wang7@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sprd/Kconfig b/sound/soc/sprd/Kconfig
index 5474fd3..5e0ac82 100644 (file)
--- a/sound/soc/sprd/Kconfig
+++ b/sound/soc/sprd/Kconfig
@@ -8,7 +8,7 @@ config SND_SOC_SPRD
          the Spreadtrum SoCs' Audio interfaces.
 
 config SND_SOC_SPRD_MCDT
-       bool "Spreadtrum multi-channel data transfer support"
+       tristate "Spreadtrum multi-channel data transfer support"
        depends on SND_SOC_SPRD
        help
          Say y here to enable multi-channel data transfer support. It

diff --git a/sound/soc/sprd/sprd-mcdt.h b/sound/soc/sprd/sprd-mcdt.h
index 9cc7e20..679e3af 100644 (file)
--- a/sound/soc/sprd/sprd-mcdt.h
+++ b/sound/soc/sprd/sprd-mcdt.h
@@ -48,7 +48,7 @@ struct sprd_mcdt_chan {
        struct list_head list;
 };
 
-#ifdef CONFIG_SND_SOC_SPRD_MCDT
+#if IS_ENABLED(CONFIG_SND_SOC_SPRD_MCDT)
 struct sprd_mcdt_chan *sprd_mcdt_request_chan(u8 channel,
                                              enum sprd_mcdt_channel_type type);
 void sprd_mcdt_free_chan(struct sprd_mcdt_chan *chan);