ASoC: Constify pointer to of_phandle_args

Constify pointer to of_phandle_args in few function arguments, for code
safety and self-documenting code.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://msgid.link/r/20240216145448.224185-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: krzk

include/sound/soc.h

@@ -1401,8 +1401,8 @@ void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
 void snd_soc_dlc_use_cpu_as_platform(struct snd_soc_dai_link_component *platforms,
 				     struct snd_soc_dai_link_component *cpus);
 struct of_phandle_args *snd_soc_copy_dai_args(struct device *dev,
-					      struct of_phandle_args *args);
-struct snd_soc_dai *snd_soc_get_dai_via_args(struct of_phandle_args *dai_args);
+					      const struct of_phandle_args *args);
+struct snd_soc_dai *snd_soc_get_dai_via_args(const struct of_phandle_args *dai_args);
 struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
 					 struct snd_soc_dai_driver *dai_drv,
 					 bool legacy_dai_naming);

sound/soc/soc-core.c

@@ -238,8 +238,8 @@ static inline void snd_soc_debugfs_exit(void) { }
 
 #endif
 
-static int snd_soc_is_match_dai_args(struct of_phandle_args *args1,
-				     struct of_phandle_args *args2)
+static int snd_soc_is_match_dai_args(const struct of_phandle_args *args1,
+				     const struct of_phandle_args *args2)
 {
 	if (!args1 || !args2)
 		return 0;
@@ -831,7 +831,8 @@ static struct device_node
 	return of_node;
 }
 
-struct of_phandle_args *snd_soc_copy_dai_args(struct device *dev, struct of_phandle_args *args)
+struct of_phandle_args *snd_soc_copy_dai_args(struct device *dev,
+					      const struct of_phandle_args *args)
 {
 	struct of_phandle_args *ret = devm_kzalloc(dev, sizeof(*ret), GFP_KERNEL);
 
@@ -3597,7 +3598,7 @@ int snd_soc_of_get_dai_name(struct device_node *of_node,
 }
 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
 
-struct snd_soc_dai *snd_soc_get_dai_via_args(struct of_phandle_args *dai_args)
+struct snd_soc_dai *snd_soc_get_dai_via_args(const struct of_phandle_args *dai_args)
 {
 	struct snd_soc_dai *dai;
 	struct snd_soc_component *component;