lkml.org 
[lkml]   [2012]   [Jul]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 20/21] ASoC: codecs: Enable AB8500 CODEC for Device Tree
Date
We continue to allow the AB8500 CODEC to be registered via the AB8500
Multi Functional Device API, only this time we extract its configuration
from the Device Tree binary.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mfd/ab8500-core.c | 1 +
include/linux/mfd/abx500/ab8500-codec.h | 6 ++-
sound/soc/codecs/ab8500-codec.c | 79 +++++++++++++++++++++++++++++++
3 files changed, 84 insertions(+), 2 deletions(-)

diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
index 626b4ec..0c5b70f 100644
--- a/drivers/mfd/ab8500-core.c
+++ b/drivers/mfd/ab8500-core.c
@@ -1076,6 +1076,7 @@ static struct mfd_cell __devinitdata ab8500_devs[] = {
},
{
.name = "ab8500-codec",
+ .of_compatible = "stericsson,ab8500-codec",
},
};

diff --git a/include/linux/mfd/abx500/ab8500-codec.h b/include/linux/mfd/abx500/ab8500-codec.h
index dc65292..d707941 100644
--- a/include/linux/mfd/abx500/ab8500-codec.h
+++ b/include/linux/mfd/abx500/ab8500-codec.h
@@ -23,7 +23,8 @@ enum amic_type {
/* Mic-biases */
enum amic_micbias {
AMIC_MICBIAS_VAMIC1,
- AMIC_MICBIAS_VAMIC2
+ AMIC_MICBIAS_VAMIC2,
+ AMIC_MICBIAS_UNKNOWN
};

/* Bias-voltage */
@@ -31,7 +32,8 @@ enum ear_cm_voltage {
EAR_CMV_0_95V,
EAR_CMV_1_10V,
EAR_CMV_1_27V,
- EAR_CMV_1_58V
+ EAR_CMV_1_58V,
+ EAR_CMV_UNKNOWN
};

/* Analog microphone settings */
diff --git a/sound/soc/codecs/ab8500-codec.c b/sound/soc/codecs/ab8500-codec.c
index 3c79592..e3ae9f5 100644
--- a/sound/soc/codecs/ab8500-codec.c
+++ b/sound/soc/codecs/ab8500-codec.c
@@ -34,6 +34,7 @@
#include <linux/mfd/abx500/ab8500-sysctrl.h>
#include <linux/mfd/abx500/ab8500-codec.h>
#include <linux/regulator/consumer.h>
+#include <linux/of.h>

#include <sound/core.h>
#include <sound/pcm.h>
@@ -2394,9 +2395,62 @@ struct snd_soc_dai_driver ab8500_codec_dai[] = {
}
};

+static void ab8500_codec_of_probe(struct device *dev, struct device_node *np,
+ struct ab8500_codec_platform_data *codec)
+{
+ u32 value;
+
+ if (of_get_property(np, "stericsson,amic1-type-single-ended", NULL))
+ codec->amics.mic1_type = AMIC_TYPE_SINGLE_ENDED;
+ else
+ codec->amics.mic1_type = AMIC_TYPE_DIFFERENTIAL;
+
+ if (of_get_property(np, "stericsson,amic2-type-single-ended", NULL))
+ codec->amics.mic2_type = AMIC_TYPE_SINGLE_ENDED;
+ else
+ codec->amics.mic2_type = AMIC_TYPE_DIFFERENTIAL;
+
+ /* Has a non-standard Vamic been requested? */
+ if(of_get_property(np, "stericsson,amic1a-bias-vamic2", NULL))
+ codec->amics.mic1a_micbias = AMIC_MICBIAS_VAMIC2;
+ else
+ codec->amics.mic1a_micbias = AMIC_MICBIAS_VAMIC1;
+
+ if (of_get_property(np, "stericsson,amic1b-bias-vamic2", NULL))
+ codec->amics.mic1b_micbias = AMIC_MICBIAS_VAMIC2;
+ else
+ codec->amics.mic1b_micbias = AMIC_MICBIAS_VAMIC1;
+
+ if (of_get_property(np, "stericsson,amic2-bias-vamic1", NULL))
+ codec->amics.mic2_micbias = AMIC_MICBIAS_VAMIC1;
+ else
+ codec->amics.mic2_micbias = AMIC_MICBIAS_VAMIC2;
+
+ if (!of_property_read_u32(np, "stericsson,earpeice-cmv", &value)) {
+ switch (value) {
+ case 950 :
+ codec->ear_cmv = EAR_CMV_0_95V;
+ break;
+ case 1100 :
+ codec->ear_cmv = EAR_CMV_1_10V;
+ break;
+ case 1270 :
+ codec->ear_cmv = EAR_CMV_1_27V;
+ break;
+ case 1580 :
+ codec->ear_cmv = EAR_CMV_1_58V;
+ break;
+ default :
+ codec->ear_cmv = EAR_CMV_UNKNOWN;
+ dev_err(dev, "Unsuitable earpiece voltage found in DT\n");
+ }
+ }
+}
+
static int ab8500_codec_probe(struct snd_soc_codec *codec)
{
struct device *dev = codec->dev;
+ struct device_node *np = dev->of_node;
struct ab8500_codec_drvdata *drvdata = dev_get_drvdata(dev);
struct ab8500_platform_data *pdata;
struct filter_control *fc;
@@ -2406,6 +2460,31 @@ static int ab8500_codec_probe(struct snd_soc_codec *codec)

/* Setup AB8500 according to board-settings */
pdata = (struct ab8500_platform_data *)dev_get_platdata(dev->parent);
+
+ if (np) {
+ if (!pdata)
+ pdata = devm_kzalloc(dev,
+ sizeof(struct ab8500_platform_data),
+ GFP_KERNEL);
+
+ if (!pdata->codec)
+ pdata->codec
+ = devm_kzalloc(dev,
+ sizeof(struct ab8500_codec_platform_data),
+ GFP_KERNEL);
+
+ if (!(pdata && pdata->codec))
+ return -ENOMEM;
+
+ ab8500_codec_of_probe(dev, np, pdata->codec);
+
+ } else {
+ if (!(pdata && pdata->codec)) {
+ dev_err(dev, "No codec platform data or DT found\n");
+ return -EINVAL;
+ }
+ }
+
status = ab8500_audio_setup_mics(codec, &pdata->codec->amics);
if (status < 0) {
pr_err("%s: Failed to setup mics (%d)!\n", __func__, status);
--
1.7.9.5


\
 
 \ /
  Last update: 2012-07-26 13:02    [W:0.157 / U:3.524 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site