diff options
| author | Paul Cercueil | 2019-04-26 04:25:49 +0200 |
|---|---|---|
| committer | Mark Brown | 2019-04-26 10:50:02 +0100 |
| commit | 90194281ee8b01fc5a223a12ac90006ae98862c4 (patch) | |
| tree | d44457d91ad29ca608ccaede55f54a46f3897e3d | |
| parent | fb45befa7ea07399372266f09e562b26db5693c9 (diff) | |
ASoC: simple-card-utils: add asoc_simple_parse_pin_switches()
This function is a helper that permits to create pin switch controls for
a list of widgets whose names are listed in the PREFIX "pin-switches"
devicetree property.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | include/sound/simple_card_utils.h | 2 | ||||
| -rw-r--r-- | sound/soc/generic/simple-card-utils.c | 57 |
2 files changed, 59 insertions, 0 deletions
diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h index 67dc3ee6ed01..3429888347e7 100644 --- a/include/sound/simple_card_utils.h +++ b/include/sound/simple_card_utils.h @@ -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, diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c index db1458a19985..f4c6375d11c7 100644 --- a/sound/soc/generic/simple-card-utils.c +++ b/sound/soc/generic/simple-card-utils.c @@ -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) |