ASoC: ssm4567: Add sense support
The ssm4567 has sensing circuitry that can be used to monitor the current
and voltage on the speaker amplifier output has well as the VBAT input.
This data can be output over the I2S interface so it can be processed by a
DSP or similar.
This patch adds the sense capture output stream to the CODEC DAI as well as
DAPM widgets that ensure that the sensing circuitry is powered up when the
capture stream is active.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/codecs/ssm4567.c b/sound/soc/codecs/ssm4567.c
index ac242b2..e619d56 100644
--- a/sound/soc/codecs/ssm4567.c
+++ b/sound/soc/codecs/ssm4567.c
@@ -174,6 +174,12 @@
SND_SOC_DAPM_SWITCH("Amplifier Boost", SSM4567_REG_POWER_CTRL, 3, 1,
&ssm4567_amplifier_boost_control),
+ SND_SOC_DAPM_SIGGEN("Sense"),
+
+ SND_SOC_DAPM_PGA("Current Sense", SSM4567_REG_POWER_CTRL, 4, 1, NULL, 0),
+ SND_SOC_DAPM_PGA("Voltage Sense", SSM4567_REG_POWER_CTRL, 5, 1, NULL, 0),
+ SND_SOC_DAPM_PGA("VBAT Sense", SSM4567_REG_POWER_CTRL, 6, 1, NULL, 0),
+
SND_SOC_DAPM_OUTPUT("OUT"),
};
@@ -181,6 +187,13 @@
{ "OUT", NULL, "Amplifier Boost" },
{ "Amplifier Boost", "Switch", "DAC" },
{ "OUT", NULL, "DAC" },
+
+ { "Current Sense", NULL, "Sense" },
+ { "Voltage Sense", NULL, "Sense" },
+ { "VBAT Sense", NULL, "Sense" },
+ { "Capture Sense", NULL, "Current Sense" },
+ { "Capture Sense", NULL, "Voltage Sense" },
+ { "Capture Sense", NULL, "VBAT Sense" },
};
static int ssm4567_hw_params(struct snd_pcm_substream *substream,
@@ -388,6 +401,14 @@
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32,
},
+ .capture = {
+ .stream_name = "Capture Sense",
+ .channels_min = 1,
+ .channels_max = 1,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S32,
+ },
.ops = &ssm4567_dai_ops,
};
