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Subject[PATCH] ASoC: simple-mux: add read function
Date
During initialisation DAPM tries to read the state of the MUX
being connected, resulting in this error log:
input-mux: ASoC: error at soc_component_read_no_lock on input-mux: -5

Provide a read function which allows DAPM to read the state of the
MUX.

Signed-off-by: Maarten Zanders <maarten.zanders@mind.be>
---
sound/soc/codecs/simple-mux.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/sound/soc/codecs/simple-mux.c b/sound/soc/codecs/simple-mux.c
index d30c0d24d90a..bf67de12d20b 100644
--- a/sound/soc/codecs/simple-mux.c
+++ b/sound/soc/codecs/simple-mux.c
@@ -55,6 +55,14 @@ static int simple_mux_control_put(struct snd_kcontrol *kcontrol,
e, NULL);
}

+static unsigned int simple_mux_read(struct snd_soc_component *component,
+ unsigned int reg)
+{
+ struct simple_mux *priv = snd_soc_component_get_drvdata(component);
+
+ return priv->mux;
+}
+
static const struct snd_kcontrol_new simple_mux_mux =
SOC_DAPM_ENUM_EXT("Muxer", simple_mux_enum, simple_mux_control_get, simple_mux_control_put);

@@ -76,6 +84,7 @@ static const struct snd_soc_component_driver simple_mux_component_driver = {
.num_dapm_widgets = ARRAY_SIZE(simple_mux_dapm_widgets),
.dapm_routes = simple_mux_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(simple_mux_dapm_routes),
+ .read = simple_mux_read,
};

static int simple_mux_probe(struct platform_device *pdev)
--
2.37.3
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