ASoC: Few constifications (mostly arguments)

Merge series from Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>:

Make few pointers in ASoC functions as pointers to const, so the code is
clearer to read, a bit safer and allows further constifications (e.g.
placing some data as rodata).

2 files changed, 24 insertions, 21 deletions

diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
index 279223c4ef5e..bbb72ad4c951 100644
--- a/include/sound/soc-dai.h
+++ b/include/sound/soc-dai.h
@@ -180,8 +180,8 @@ int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio);
 
 /* Digital Audio interface formatting */
-int snd_soc_dai_get_fmt_max_priority(struct snd_soc_pcm_runtime *rtd);
-u64 snd_soc_dai_get_fmt(struct snd_soc_dai *dai, int priority);
+int snd_soc_dai_get_fmt_max_priority(const struct snd_soc_pcm_runtime *rtd);
+u64 snd_soc_dai_get_fmt(const struct snd_soc_dai *dai, int priority);
 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
 
 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
@@ -198,11 +198,11 @@ int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
 			     int direction);
 
 
-int snd_soc_dai_get_channel_map(struct snd_soc_dai *dai,
+int snd_soc_dai_get_channel_map(const struct snd_soc_dai *dai,
 		unsigned int *tx_num, unsigned int *tx_slot,
 		unsigned int *rx_num, unsigned int *rx_slot);
 
-int snd_soc_dai_is_dummy(struct snd_soc_dai *dai);
+int snd_soc_dai_is_dummy(const struct snd_soc_dai *dai);
 
 int snd_soc_dai_hw_params(struct snd_soc_dai *dai,
 			  struct snd_pcm_substream *substream,
@@ -218,7 +218,7 @@ void snd_soc_dai_suspend(struct snd_soc_dai *dai);
 void snd_soc_dai_resume(struct snd_soc_dai *dai);
 int snd_soc_dai_compress_new(struct snd_soc_dai *dai,
 			     struct snd_soc_pcm_runtime *rtd, int num);
-bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int stream);
+bool snd_soc_dai_stream_valid(const struct snd_soc_dai *dai, int stream);
 void snd_soc_dai_link_set_capabilities(struct snd_soc_dai_link *dai_link);
 void snd_soc_dai_action(struct snd_soc_dai *dai,
 			int stream, int action);
@@ -232,7 +232,7 @@ static inline void snd_soc_dai_deactivate(struct snd_soc_dai *dai,
 {
 	snd_soc_dai_action(dai, stream, -1);
 }
-int snd_soc_dai_active(struct snd_soc_dai *dai);
+int snd_soc_dai_active(const struct snd_soc_dai *dai);
 
 int snd_soc_pcm_dai_probe(struct snd_soc_pcm_runtime *rtd, int order);
 int snd_soc_pcm_dai_remove(struct snd_soc_pcm_runtime *rtd, int order);
@@ -271,7 +271,7 @@ int snd_soc_dai_compr_get_metadata(struct snd_soc_dai *dai,
 				   struct snd_compr_stream *cstream,
 				   struct snd_compr_metadata *metadata);
 
-const char *snd_soc_dai_name_get(struct snd_soc_dai *dai);
+const char *snd_soc_dai_name_get(const struct snd_soc_dai *dai);
 
 struct snd_soc_dai_ops {
 	/* DAI driver callbacks */
@@ -307,7 +307,7 @@ struct snd_soc_dai_ops {
 	int (*set_channel_map)(struct snd_soc_dai *dai,
 		unsigned int tx_num, const unsigned int *tx_slot,
 		unsigned int rx_num, const unsigned int *rx_slot);
-	int (*get_channel_map)(struct snd_soc_dai *dai,
+	int (*get_channel_map)(const struct snd_soc_dai *dai,
 			unsigned int *tx_num, unsigned int *tx_slot,
 			unsigned int *rx_num, unsigned int *rx_slot);
 	int (*set_tristate)(struct snd_soc_dai *dai, int tristate);
@@ -413,7 +413,7 @@ struct snd_soc_dai_driver {
 	unsigned int id;
 	unsigned int base;
 	struct snd_soc_dobj dobj;
-	struct of_phandle_args *dai_args;
+	const struct of_phandle_args *dai_args;
 
 	/* ops */
 	const struct snd_soc_dai_ops *ops;
@@ -473,7 +473,7 @@ struct snd_soc_dai {
 	unsigned int probed:1;
 };
 
-static inline struct snd_soc_pcm_stream *
+static inline const struct snd_soc_pcm_stream *
 snd_soc_dai_get_pcm_stream(const struct snd_soc_dai *dai, int stream)
 {
 	return (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
@@ -518,7 +518,8 @@ static inline void snd_soc_dai_init_dma_data(struct snd_soc_dai *dai, void *play
 	snd_soc_dai_dma_data_set_capture(dai,  capture);
 }
 
-static inline unsigned int snd_soc_dai_tdm_mask_get(struct snd_soc_dai *dai, int stream)
+static inline unsigned int snd_soc_dai_tdm_mask_get(const struct snd_soc_dai *dai,
+						    int stream)
 {
 	return dai->stream[stream].tdm_mask;
 }
@@ -529,7 +530,8 @@ static inline void snd_soc_dai_tdm_mask_set(struct snd_soc_dai *dai, int stream,
 	dai->stream[stream].tdm_mask = tdm_mask;
 }
 
-static inline unsigned int snd_soc_dai_stream_active(struct snd_soc_dai *dai, int stream)
+static inline unsigned int snd_soc_dai_stream_active(const struct snd_soc_dai *dai,
+						     int stream)
 {
 	/* see snd_soc_dai_action() for setup */
 	return dai->stream[stream].active;
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 33671437ee89..a8e66bbf932b 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -534,10 +534,10 @@ static inline int snd_soc_set_dmi_name(struct snd_soc_card *card,
 
 /* Utility functions to get clock rates from various things */
 int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots);
-int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params);
+int snd_soc_params_to_frame_size(const struct snd_pcm_hw_params *params);
 int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots);
-int snd_soc_params_to_bclk(struct snd_pcm_hw_params *parms);
-int snd_soc_tdm_params_to_bclk(struct snd_pcm_hw_params *params,
+int snd_soc_params_to_bclk(const struct snd_pcm_hw_params *parms);
+int snd_soc_tdm_params_to_bclk(const struct snd_pcm_hw_params *params,
 			       int tdm_width, int tdm_slots, int slot_multiple);
 
 /* set runtime hw params */
@@ -675,7 +675,7 @@ struct snd_soc_dai_link_component {
 	const char *name;
 	struct device_node *of_node;
 	const char *dai_name;
-	struct of_phandle_args *dai_args;
+	const struct of_phandle_args *dai_args;
 };
 
 /*
@@ -837,7 +837,8 @@ struct snd_soc_dai_link {
 #endif
 };
 
-static inline int snd_soc_link_num_ch_map(struct snd_soc_dai_link *link) {
+static inline int snd_soc_link_num_ch_map(const struct snd_soc_dai_link *link)
+{
 	return max(link->num_cpus, link->num_codecs);
 }
 
@@ -1299,7 +1300,7 @@ struct soc_enum {
 #endif
 };
 
-static inline bool snd_soc_volsw_is_stereo(struct soc_mixer_control *mc)
+static inline bool snd_soc_volsw_is_stereo(const struct soc_mixer_control *mc)
 {
 	if (mc->reg == mc->rreg && mc->shift == mc->rshift)
 		return false;
@@ -1311,7 +1312,7 @@ static inline bool snd_soc_volsw_is_stereo(struct soc_mixer_control *mc)
 	return true;
 }
 
-static inline unsigned int snd_soc_enum_val_to_item(struct soc_enum *e,
+static inline unsigned int snd_soc_enum_val_to_item(const struct soc_enum *e,
 	unsigned int val)
 {
 	unsigned int i;
@@ -1326,7 +1327,7 @@ static inline unsigned int snd_soc_enum_val_to_item(struct soc_enum *e,
 	return 0;
 }
 
-static inline unsigned int snd_soc_enum_item_to_val(struct soc_enum *e,
+static inline unsigned int snd_soc_enum_item_to_val(const struct soc_enum *e,
 	unsigned int item)
 {
 	if (!e->values)
@@ -1401,7 +1402,7 @@ unsigned int snd_soc_daifmt_parse_clock_provider_raw(struct device_node *np,
 	snd_soc_daifmt_clock_provider_from_bitmap(			\
 		snd_soc_daifmt_parse_clock_provider_as_bitmap(np, prefix))
 
-int snd_soc_get_stream_cpu(struct snd_soc_dai_link *dai_link, int stream);
+int snd_soc_get_stream_cpu(const struct snd_soc_dai_link *dai_link, int stream);
 int snd_soc_get_dlc(const struct of_phandle_args *args,
 		    struct snd_soc_dai_link_component *dlc);
 int snd_soc_of_get_dlc(struct device_node *of_node,