ASoC: simple-card-utils: add asoc_simple_parse_pin_switches() (90194281) · Commits · 戴 / test

include/sound/simple_card_utils.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -133,6 +133,8 @@ int asoc_simple_parse_routing(struct snd_soc_card *card,
		char *prefix);
		int asoc_simple_parse_widgets(struct snd_soc_card *card,
		char *prefix);
		int asoc_simple_parse_pin_switches(struct snd_soc_card *card,
		char *prefix);

		int asoc_simple_init_jack(struct snd_soc_card *card,
		struct asoc_simple_jack *sjack,

sound/soc/generic/simple-card-utils.c

+57 −0

Original line number	Diff line number	Diff line
		@@ -430,6 +430,63 @@ int asoc_simple_parse_widgets(struct snd_soc_card *card,
		}
		EXPORT_SYMBOL_GPL(asoc_simple_parse_widgets);

		int asoc_simple_parse_pin_switches(struct snd_soc_card *card,
		char *prefix)
		{
		const unsigned int nb_controls_max = 16;
		const char *strings, control_name;
		struct snd_kcontrol_new *controls;
		struct device *dev = card->dev;
		unsigned int i, nb_controls;
		char prop[128];
		int ret;

		if (!prefix)
		prefix = "";

		snprintf(prop, sizeof(prop), "%s%s", prefix, "pin-switches");

		if (!of_property_read_bool(dev->of_node, prop))
		return 0;

		strings = devm_kcalloc(dev, nb_controls_max,
		sizeof(*strings), GFP_KERNEL);
		if (!strings)
		return -ENOMEM;

		ret = of_property_read_string_array(dev->of_node, prop,
		strings, nb_controls_max);
		if (ret < 0)
		return ret;

		nb_controls = (unsigned int)ret;

		controls = devm_kcalloc(dev, nb_controls,
		sizeof(*controls), GFP_KERNEL);
		if (!controls)
		return -ENOMEM;

		for (i = 0; i < nb_controls; i++) {
		control_name = devm_kasprintf(dev, GFP_KERNEL,
		"%s Switch", strings[i]);
		if (!control_name)
		return -ENOMEM;

		controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
		controls[i].name = control_name;
		controls[i].info = snd_soc_dapm_info_pin_switch;
		controls[i].get = snd_soc_dapm_get_pin_switch;
		controls[i].put = snd_soc_dapm_put_pin_switch;
		controls[i].private_value = (unsigned long)strings[i];
		}

		card->controls = controls;
		card->num_controls = nb_controls;

		return 0;
		}
		EXPORT_SYMBOL_GPL(asoc_simple_parse_pin_switches);

		int asoc_simple_init_jack(struct snd_soc_card *card,
		struct asoc_simple_jack *sjack,
		int is_hp, char *prefix)

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