ASoC: Add helper functions for deferred regmap setup
Some drivers (most notably the AC'97 drivers) do not have access to their regmap struct when the component/codec is registered. For those drivers the automatic regmap setup will not work and needs to be done manually, typically from the component/CODEC drivers probe callback. This patch adds a set of helper function to handle deferred regmap initialization as well as early regmap tear-down. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@kernel.org>
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f114040e3e
Коммит
20feb88198
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@ -1277,6 +1277,41 @@ void snd_soc_component_async_complete(struct snd_soc_component *component);
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int snd_soc_component_test_bits(struct snd_soc_component *component,
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unsigned int reg, unsigned int mask, unsigned int value);
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void snd_soc_component_init_regmap(struct snd_soc_component *component,
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struct regmap *regmap);
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void snd_soc_component_exit_regmap(struct snd_soc_component *component);
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/**
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* snd_soc_codec_init_regmap() - Initialize regmap instance for the CODEC
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* @codec: The CODEC for which to initialize the regmap instance
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* @regmap: The regmap instance that should be used by the CODEC
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*
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* This function allows deferred assignment of the regmap instance that is
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* associated with the CODEC. Only use this if the regmap instance is not yet
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* ready when the CODEC is registered. The function must also be called before
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* the first IO attempt of the CODEC.
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*/
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static inline void snd_soc_codec_init_regmap(struct snd_soc_codec *codec,
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struct regmap *regmap)
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{
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snd_soc_component_init_regmap(&codec->component, regmap);
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}
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/**
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* snd_soc_codec_exit_regmap() - De-initialize regmap instance for the CODEC
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* @codec: The CODEC for which to de-initialize the regmap instance
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*
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* Calls regmap_exit() on the regmap instance associated to the CODEC and
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* removes the regmap instance from the CODEC.
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*
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* This function should only be used if snd_soc_codec_init_regmap() was used to
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* initialize the regmap instance.
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*/
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static inline void snd_soc_codec_exit_regmap(struct snd_soc_codec *codec)
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{
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snd_soc_component_exit_regmap(&codec->component);
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}
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/* device driver data */
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static inline void snd_soc_card_set_drvdata(struct snd_soc_card *card,
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@ -3996,22 +3996,58 @@ static int snd_soc_component_initialize(struct snd_soc_component *component,
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return 0;
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}
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static void snd_soc_component_init_regmap(struct snd_soc_component *component)
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static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
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{
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if (!component->regmap)
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component->regmap = dev_get_regmap(component->dev, NULL);
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if (component->regmap) {
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int val_bytes = regmap_get_val_bytes(component->regmap);
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/* Errors are legitimate for non-integer byte multiples */
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if (val_bytes > 0)
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component->val_bytes = val_bytes;
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}
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int val_bytes = regmap_get_val_bytes(component->regmap);
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/* Errors are legitimate for non-integer byte multiples */
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if (val_bytes > 0)
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component->val_bytes = val_bytes;
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}
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/**
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* snd_soc_component_init_regmap() - Initialize regmap instance for the component
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* @component: The component for which to initialize the regmap instance
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* @regmap: The regmap instance that should be used by the component
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*
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* This function allows deferred assignment of the regmap instance that is
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* associated with the component. Only use this if the regmap instance is not
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* yet ready when the component is registered. The function must also be called
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* before the first IO attempt of the component.
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*/
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void snd_soc_component_init_regmap(struct snd_soc_component *component,
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struct regmap *regmap)
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{
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component->regmap = regmap;
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snd_soc_component_setup_regmap(component);
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}
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EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
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/**
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* snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
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* @component: The component for which to de-initialize the regmap instance
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*
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* Calls regmap_exit() on the regmap instance associated to the component and
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* removes the regmap instance from the component.
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*
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* This function should only be used if snd_soc_component_init_regmap() was used
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* to initialize the regmap instance.
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*/
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void snd_soc_component_exit_regmap(struct snd_soc_component *component)
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{
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regmap_exit(component->regmap);
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component->regmap = NULL;
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}
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EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
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static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
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{
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if (!component->write && !component->read)
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snd_soc_component_init_regmap(component);
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if (!component->write && !component->read) {
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if (!component->regmap)
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component->regmap = dev_get_regmap(component->dev, NULL);
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if (component->regmap)
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snd_soc_component_setup_regmap(component);
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}
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list_add(&component->list, &component_list);
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}
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