lkml.org 
[lkml]   [2019]   [Apr]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/3] ASoC: simple-card-utils: add asoc_simple_card_of_parse_pin_switches()
Date
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>
---
include/sound/simple_card_utils.h | 2 +
sound/soc/generic/simple-card-utils.c | 57 +++++++++++++++++++++++++++
2 files changed, 59 insertions(+)

diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h
index 7afe45389972..8a56c1713952 100644
--- a/include/sound/simple_card_utils.h
+++ b/include/sound/simple_card_utils.h
@@ -124,6 +124,8 @@ int asoc_simple_card_of_parse_routing(struct snd_soc_card *card,
char *prefix);
int asoc_simple_card_of_parse_widgets(struct snd_soc_card *card,
char *prefix);
+int asoc_simple_card_of_parse_pin_switches(struct snd_soc_card *card,
+ char *prefix);

int asoc_simple_card_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 5c1424f03620..431002e3e63f 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -469,6 +469,63 @@ int asoc_simple_card_of_parse_widgets(struct snd_soc_card *card,
}
EXPORT_SYMBOL_GPL(asoc_simple_card_of_parse_widgets);

+int asoc_simple_card_of_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_card_of_parse_pin_switches);
+
int asoc_simple_card_init_jack(struct snd_soc_card *card,
struct asoc_simple_jack *sjack,
int is_hp, char *prefix)
--
2.21.0.593.g511ec345e18
\
 
 \ /
  Last update: 2019-04-20 12:46    [W:0.101 / U:34.236 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site