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authorPaul Cercueil <paul@crapouillou.net>2019-04-26 04:25:49 +0200
committerMark Brown <broonie@kernel.org>2019-04-26 10:50:02 +0100
commit90194281ee8b01fc5a223a12ac90006ae98862c4 (patch)
treed44457d91ad29ca608ccaede55f54a46f3897e3d /sound/soc/generic
parentfb45befa7ea07399372266f09e562b26db5693c9 (diff)
downloadlinux-90194281ee8b01fc5a223a12ac90006ae98862c4.tar.bz2
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>
Diffstat (limited to 'sound/soc/generic')
-rw-r--r--sound/soc/generic/simple-card-utils.c57
1 files changed, 57 insertions, 0 deletions
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)