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-rw-r--r--Documentation/devicetree/bindings/sound/audio-iio-aux.yaml64
-rw-r--r--Documentation/devicetree/bindings/sound/simple-card.yaml53
-rw-r--r--drivers/iio/inkern.c86
-rw-r--r--include/linux/iio/consumer.h37
-rw-r--r--include/linux/minmax.h64
-rw-r--r--include/sound/soc-dapm.h138
-rw-r--r--sound/soc/codecs/Kconfig12
-rw-r--r--sound/soc/codecs/Makefile2
-rw-r--r--sound/soc/codecs/audio-iio-aux.c344
-rw-r--r--sound/soc/generic/simple-card.c46
10 files changed, 775 insertions, 71 deletions
diff --git a/Documentation/devicetree/bindings/sound/audio-iio-aux.yaml b/Documentation/devicetree/bindings/sound/audio-iio-aux.yaml
new file mode 100644
index 000000000000..d3cc1ea4a175
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/audio-iio-aux.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/audio-iio-aux.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Audio IIO auxiliary
+
+maintainers:
+ - Herve Codina <herve.codina@bootlin.com>
+
+description:
+ Auxiliary device based on Industrial I/O device channels
+
+allOf:
+ - $ref: dai-common.yaml#
+
+properties:
+ compatible:
+ const: audio-iio-aux
+
+ io-channels:
+ description:
+ Industrial I/O device channels used
+
+ io-channel-names:
+ description:
+ Industrial I/O channel names related to io-channels.
+ These names are used to provides sound controls, widgets and routes names.
+
+ snd-control-invert-range:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ description: |
+ A list of 0/1 flags defining whether or not the related channel is
+ inverted
+ items:
+ enum: [0, 1]
+ default: 0
+ description: |
+ Invert the sound control value compared to the IIO channel raw value.
+ - 1: The related sound control value is inverted meaning that the
+ minimum sound control value correspond to the maximum IIO channel
+ raw value and the maximum sound control value correspond to the
+ minimum IIO channel raw value.
+ - 0: The related sound control value is not inverted meaning that the
+ minimum (resp maximum) sound control value correspond to the
+ minimum (resp maximum) IIO channel raw value.
+
+required:
+ - compatible
+ - io-channels
+ - io-channel-names
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ iio-aux {
+ compatible = "audio-iio-aux";
+ io-channels = <&iio 0>, <&iio 1>, <&iio 2>, <&iio 3>;
+ io-channel-names = "CH0", "CH1", "CH2", "CH3";
+ /* Invert CH1 and CH2 */
+ snd-control-invert-range = <0 1 1 0>;
+ };
diff --git a/Documentation/devicetree/bindings/sound/simple-card.yaml b/Documentation/devicetree/bindings/sound/simple-card.yaml
index b05e05c81cc4..59ac2d1d1ccf 100644
--- a/Documentation/devicetree/bindings/sound/simple-card.yaml
+++ b/Documentation/devicetree/bindings/sound/simple-card.yaml
@@ -148,6 +148,15 @@ definitions:
required:
- sound-dai
+ additional-devs:
+ type: object
+ description:
+ Additional devices used by the simple audio card.
+ patternProperties:
+ '^iio-aux(-.+)?$':
+ type: object
+ $ref: audio-iio-aux.yaml#
+
properties:
compatible:
contains:
@@ -187,6 +196,8 @@ properties:
$ref: "#/definitions/mclk-fs"
simple-audio-card,aux-devs:
$ref: "#/definitions/aux-devs"
+ simple-audio-card,additional-devs:
+ $ref: "#/definitions/additional-devs"
simple-audio-card,convert-rate:
$ref: "#/definitions/convert-rate"
simple-audio-card,convert-channels:
@@ -360,6 +371,48 @@ examples:
};
# --------------------
+# route audio to/from a codec through an amplifier
+# designed with a potentiometer driven by IIO:
+# --------------------
+ - |
+ sound {
+ compatible = "simple-audio-card";
+
+ simple-audio-card,aux-devs = <&amp_in>, <&amp_out>;
+ simple-audio-card,routing =
+ "CODEC LEFTIN", "AMP_IN LEFT OUT",
+ "CODEC RIGHTIN", "AMP_IN RIGHT OUT",
+ "AMP_OUT LEFT IN", "CODEC LEFTOUT",
+ "AMP_OUT RIGHT IN", "CODEC RIGHTOUT";
+
+ simple-audio-card,additional-devs {
+ amp_out: iio-aux-out {
+ compatible = "audio-iio-aux";
+ io-channels = <&pot_out 0>, <&pot_out 1>;
+ io-channel-names = "LEFT", "RIGHT";
+ snd-control-invert-range = <1 1>;
+ sound-name-prefix = "AMP_OUT";
+ };
+
+ amp_in: iio_aux-in {
+ compatible = "audio-iio-aux";
+ io-channels = <&pot_in 0>, <&pot_in 1>;
+ io-channel-names = "LEFT", "RIGHT";
+ sound-name-prefix = "AMP_IN";
+ };
+ };
+
+ simple-audio-card,cpu {
+ sound-dai = <&cpu>;
+ };
+
+ simple-audio-card,codec {
+ sound-dai = <&codec>;
+ clocks = <&clocks>;
+ };
+ };
+
+# --------------------
# Sampling Rate Conversion
# --------------------
- |
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index 872fd5c24147..7a1f6713318a 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -5,9 +5,10 @@
*/
#include <linux/err.h>
#include <linux/export.h>
+#include <linux/minmax.h>
+#include <linux/mutex.h>
#include <linux/property.h>
#include <linux/slab.h>
-#include <linux/mutex.h>
#include <linux/iio/iio.h>
#include <linux/iio/iio-opaque.h>
@@ -849,15 +850,14 @@ static int iio_channel_read_max(struct iio_channel *chan,
int *val, int *val2, int *type,
enum iio_chan_info_enum info)
{
- int unused;
const int *vals;
int length;
int ret;
- if (!val2)
- val2 = &unused;
-
ret = iio_channel_read_avail(chan, &vals, type, &length, info);
+ if (ret < 0)
+ return ret;
+
switch (ret) {
case IIO_AVAIL_RANGE:
switch (*type) {
@@ -866,7 +866,8 @@ static int iio_channel_read_max(struct iio_channel *chan,
break;
default:
*val = vals[4];
- *val2 = vals[5];
+ if (val2)
+ *val2 = vals[5];
}
return 0;
@@ -875,20 +876,16 @@ static int iio_channel_read_max(struct iio_channel *chan,
return -EINVAL;
switch (*type) {
case IIO_VAL_INT:
- *val = vals[--length];
- while (length) {
- if (vals[--length] > *val)
- *val = vals[length];
- }
+ *val = max_array(vals, length);
break;
default:
- /* FIXME: learn about max for other iio values */
+ /* TODO: learn about max for other iio values */
return -EINVAL;
}
return 0;
default:
- return ret;
+ return -EINVAL;
}
}
@@ -912,6 +909,69 @@ err_unlock:
}
EXPORT_SYMBOL_GPL(iio_read_max_channel_raw);
+static int iio_channel_read_min(struct iio_channel *chan,
+ int *val, int *val2, int *type,
+ enum iio_chan_info_enum info)
+{
+ const int *vals;
+ int length;
+ int ret;
+
+ ret = iio_channel_read_avail(chan, &vals, type, &length, info);
+ if (ret < 0)
+ return ret;
+
+ switch (ret) {
+ case IIO_AVAIL_RANGE:
+ switch (*type) {
+ case IIO_VAL_INT:
+ *val = vals[0];
+ break;
+ default:
+ *val = vals[0];
+ if (val2)
+ *val2 = vals[1];
+ }
+ return 0;
+
+ case IIO_AVAIL_LIST:
+ if (length <= 0)
+ return -EINVAL;
+ switch (*type) {
+ case IIO_VAL_INT:
+ *val = min_array(vals, length);
+ break;
+ default:
+ /* TODO: learn about min for other iio values */
+ return -EINVAL;
+ }
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+int iio_read_min_channel_raw(struct iio_channel *chan, int *val)
+{
+ struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(chan->indio_dev);
+ int ret;
+ int type;
+
+ mutex_lock(&iio_dev_opaque->info_exist_lock);
+ if (!chan->indio_dev->info) {
+ ret = -ENODEV;
+ goto err_unlock;
+ }
+
+ ret = iio_channel_read_min(chan, val, NULL, &type, IIO_CHAN_INFO_RAW);
+err_unlock:
+ mutex_unlock(&iio_dev_opaque->info_exist_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(iio_read_min_channel_raw);
+
int iio_get_channel_type(struct iio_channel *chan, enum iio_chan_type *type)
{
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(chan->indio_dev);
diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h
index 6802596b017c..e9910b41d48e 100644
--- a/include/linux/iio/consumer.h
+++ b/include/linux/iio/consumer.h
@@ -201,8 +201,9 @@ struct iio_dev
* @chan: The channel being queried.
* @val: Value read back.
*
- * Note raw reads from iio channels are in adc counts and hence
- * scale will need to be applied if standard units required.
+ * Note, if standard units are required, raw reads from iio channels
+ * need the offset (default 0) and scale (default 1) to be applied
+ * as (raw + offset) * scale.
*/
int iio_read_channel_raw(struct iio_channel *chan,
int *val);
@@ -212,8 +213,9 @@ int iio_read_channel_raw(struct iio_channel *chan,
* @chan: The channel being queried.
* @val: Value read back.
*
- * Note raw reads from iio channels are in adc counts and hence
- * scale will need to be applied if standard units required.
+ * Note, if standard units are required, raw reads from iio channels
+ * need the offset (default 0) and scale (default 1) to be applied
+ * as (raw + offset) * scale.
*
* In opposit to the normal iio_read_channel_raw this function
* returns the average of multiple reads.
@@ -281,8 +283,9 @@ int iio_read_channel_attribute(struct iio_channel *chan, int *val,
* @chan: The channel being queried.
* @val: Value being written.
*
- * Note raw writes to iio channels are in dac counts and hence
- * scale will need to be applied if standard units required.
+ * Note that for raw writes to iio channels, if the value provided is
+ * in standard units, the affect of the scale and offset must be removed
+ * as (value / scale) - offset.
*/
int iio_write_channel_raw(struct iio_channel *chan, int val);
@@ -292,12 +295,25 @@ int iio_write_channel_raw(struct iio_channel *chan, int val);
* @chan: The channel being queried.
* @val: Value read back.
*
- * Note raw reads from iio channels are in adc counts and hence
- * scale will need to be applied if standard units are required.
+ * Note, if standard units are required, raw reads from iio channels
+ * need the offset (default 0) and scale (default 1) to be applied
+ * as (raw + offset) * scale.
*/
int iio_read_max_channel_raw(struct iio_channel *chan, int *val);
/**
+ * iio_read_min_channel_raw() - read minimum available raw value from a given
+ * channel, i.e. the minimum possible value.
+ * @chan: The channel being queried.
+ * @val: Value read back.
+ *
+ * Note, if standard units are required, raw reads from iio channels
+ * need the offset (default 0) and scale (default 1) to be applied
+ * as (raw + offset) * scale.
+ */
+int iio_read_min_channel_raw(struct iio_channel *chan, int *val);
+
+/**
* iio_read_avail_channel_raw() - read available raw values from a given channel
* @chan: The channel being queried.
* @vals: Available values read back.
@@ -308,8 +324,9 @@ int iio_read_max_channel_raw(struct iio_channel *chan, int *val);
* For ranges, three vals are always returned; min, step and max.
* For lists, all the possible values are enumerated.
*
- * Note raw available values from iio channels are in adc counts and
- * hence scale will need to be applied if standard units are required.
+ * Note, if standard units are required, raw available values from iio
+ * channels need the offset (default 0) and scale (default 1) to be applied
+ * as (raw + offset) * scale.
*/
int iio_read_avail_channel_raw(struct iio_channel *chan,
const int **vals, int *length);
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 396df1121bff..798c6963909f 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -133,6 +133,70 @@
*/
#define max_t(type, x, y) __careful_cmp((type)(x), (type)(y), >)
+/*
+ * Remove a const qualifier from integer types
+ * _Generic(foo, type-name: association, ..., default: association) performs a
+ * comparison against the foo type (not the qualified type).
+ * Do not use the const keyword in the type-name as it will not match the
+ * unqualified type of foo.
+ */
+#define __unconst_integer_type_cases(type) \
+ unsigned type: (unsigned type)0, \
+ signed type: (signed type)0
+
+#define __unconst_integer_typeof(x) typeof( \
+ _Generic((x), \
+ char: (char)0, \
+ __unconst_integer_type_cases(char), \
+ __unconst_integer_type_cases(short), \
+ __unconst_integer_type_cases(int), \
+ __unconst_integer_type_cases(long), \
+ __unconst_integer_type_cases(long long), \
+ default: (x)))
+
+/*
+ * Do not check the array parameter using __must_be_array().
+ * In the following legit use-case where the "array" passed is a simple pointer,
+ * __must_be_array() will return a failure.
+ * --- 8< ---
+ * int *buff
+ * ...
+ * min = min_array(buff, nb_items);
+ * --- 8< ---
+ *
+ * The first typeof(&(array)[0]) is needed in order to support arrays of both
+ * 'int *buff' and 'int buff[N]' types.
+ *
+ * The array can be an array of const items.
+ * typeof() keeps the const qualifier. Use __unconst_integer_typeof() in order
+ * to discard the const qualifier for the __element variable.
+ */
+#define __minmax_array(op, array, len) ({ \
+ typeof(&(array)[0]) __array = (array); \
+ typeof(len) __len = (len); \
+ __unconst_integer_typeof(__array[0]) __element = __array[--__len]; \
+ while (__len--) \
+ __element = op(__element, __array[__len]); \
+ __element; })
+
+/**
+ * min_array - return minimum of values present in an array
+ * @array: array
+ * @len: array length
+ *
+ * Note that @len must not be zero (empty array).
+ */
+#define min_array(array, len) __minmax_array(min, array, len)
+
+/**
+ * max_array - return maximum of values present in an array
+ * @array: array
+ * @len: array length
+ *
+ * Note that @len must not be zero (empty array).
+ */
+#define max_array(array, len) __minmax_array(max, array, len)
+
/**
* clamp_t - return a value clamped to a given range using a given type
* @type: the type of variable to use
diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index 87f8e1793af1..2e38dff16779 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -42,36 +42,45 @@ struct soc_enum;
/* codec domain */
#define SND_SOC_DAPM_VMID(wname) \
-{ .id = snd_soc_dapm_vmid, .name = wname, .kcontrol_news = NULL, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_vmid, .name = wname, .kcontrol_news = NULL, \
.num_kcontrols = 0}
/* platform domain */
#define SND_SOC_DAPM_SIGGEN(wname) \
-{ .id = snd_soc_dapm_siggen, .name = wname, .kcontrol_news = NULL, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_siggen, .name = wname, .kcontrol_news = NULL, \
.num_kcontrols = 0, .reg = SND_SOC_NOPM }
#define SND_SOC_DAPM_SINK(wname) \
-{ .id = snd_soc_dapm_sink, .name = wname, .kcontrol_news = NULL, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_sink, .name = wname, .kcontrol_news = NULL, \
.num_kcontrols = 0, .reg = SND_SOC_NOPM }
#define SND_SOC_DAPM_INPUT(wname) \
-{ .id = snd_soc_dapm_input, .name = wname, .kcontrol_news = NULL, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_input, .name = wname, .kcontrol_news = NULL, \
.num_kcontrols = 0, .reg = SND_SOC_NOPM }
#define SND_SOC_DAPM_OUTPUT(wname) \
-{ .id = snd_soc_dapm_output, .name = wname, .kcontrol_news = NULL, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_output, .name = wname, .kcontrol_news = NULL, \
.num_kcontrols = 0, .reg = SND_SOC_NOPM }
#define SND_SOC_DAPM_MIC(wname, wevent) \
-{ .id = snd_soc_dapm_mic, .name = wname, .kcontrol_news = NULL, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_mic, .name = wname, .kcontrol_news = NULL, \
.num_kcontrols = 0, .reg = SND_SOC_NOPM, .event = wevent, \
.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD}
#define SND_SOC_DAPM_HP(wname, wevent) \
-{ .id = snd_soc_dapm_hp, .name = wname, .kcontrol_news = NULL, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_hp, .name = wname, .kcontrol_news = NULL, \
.num_kcontrols = 0, .reg = SND_SOC_NOPM, .event = wevent, \
.event_flags = SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD}
#define SND_SOC_DAPM_SPK(wname, wevent) \
-{ .id = snd_soc_dapm_spk, .name = wname, .kcontrol_news = NULL, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_spk, .name = wname, .kcontrol_news = NULL, \
.num_kcontrols = 0, .reg = SND_SOC_NOPM, .event = wevent, \
.event_flags = SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD}
#define SND_SOC_DAPM_LINE(wname, wevent) \
-{ .id = snd_soc_dapm_line, .name = wname, .kcontrol_news = NULL, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_line, .name = wname, .kcontrol_news = NULL, \
.num_kcontrols = 0, .reg = SND_SOC_NOPM, .event = wevent, \
.event_flags = SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD}
@@ -82,93 +91,110 @@ struct soc_enum;
/* path domain */
#define SND_SOC_DAPM_PGA(wname, wreg, wshift, winvert,\
wcontrols, wncontrols) \
-{ .id = snd_soc_dapm_pga, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_pga, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = wncontrols}
#define SND_SOC_DAPM_OUT_DRV(wname, wreg, wshift, winvert,\
wcontrols, wncontrols) \
-{ .id = snd_soc_dapm_out_drv, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_out_drv, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = wncontrols}
#define SND_SOC_DAPM_MIXER(wname, wreg, wshift, winvert, \
wcontrols, wncontrols)\
-{ .id = snd_soc_dapm_mixer, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_mixer, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = wncontrols}
#define SND_SOC_DAPM_MIXER_NAMED_CTL(wname, wreg, wshift, winvert, \
wcontrols, wncontrols)\
-{ .id = snd_soc_dapm_mixer_named_ctl, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_mixer_named_ctl, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = wncontrols}
/* DEPRECATED: use SND_SOC_DAPM_SUPPLY */
#define SND_SOC_DAPM_MICBIAS(wname, wreg, wshift, winvert) \
-{ .id = snd_soc_dapm_micbias, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_micbias, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = NULL, .num_kcontrols = 0}
#define SND_SOC_DAPM_SWITCH(wname, wreg, wshift, winvert, wcontrols) \
-{ .id = snd_soc_dapm_switch, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_switch, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = 1}
#define SND_SOC_DAPM_MUX(wname, wreg, wshift, winvert, wcontrols) \
-{ .id = snd_soc_dapm_mux, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_mux, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = 1}
#define SND_SOC_DAPM_DEMUX(wname, wreg, wshift, winvert, wcontrols) \
-{ .id = snd_soc_dapm_demux, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_demux, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = 1}
/* Simplified versions of above macros, assuming wncontrols = ARRAY_SIZE(wcontrols) */
#define SOC_PGA_ARRAY(wname, wreg, wshift, winvert,\
wcontrols) \
-{ .id = snd_soc_dapm_pga, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_pga, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = ARRAY_SIZE(wcontrols)}
#define SOC_MIXER_ARRAY(wname, wreg, wshift, winvert, \
wcontrols)\
-{ .id = snd_soc_dapm_mixer, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_mixer, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = ARRAY_SIZE(wcontrols)}
#define SOC_MIXER_NAMED_CTL_ARRAY(wname, wreg, wshift, winvert, \
wcontrols)\
-{ .id = snd_soc_dapm_mixer_named_ctl, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_mixer_named_ctl, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = ARRAY_SIZE(wcontrols)}
/* path domain with event - event handler must return 0 for success */
#define SND_SOC_DAPM_PGA_E(wname, wreg, wshift, winvert, wcontrols, \
wncontrols, wevent, wflags) \
-{ .id = snd_soc_dapm_pga, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_pga, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = wncontrols, \
.event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_OUT_DRV_E(wname, wreg, wshift, winvert, wcontrols, \
wncontrols, wevent, wflags) \
-{ .id = snd_soc_dapm_out_drv, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_out_drv, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = wncontrols, \
.event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_MIXER_E(wname, wreg, wshift, winvert, wcontrols, \
wncontrols, wevent, wflags) \
-{ .id = snd_soc_dapm_mixer, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_mixer, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = wncontrols, \
.event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_MIXER_NAMED_CTL_E(wname, wreg, wshift, winvert, \
wcontrols, wncontrols, wevent, wflags) \
-{ .id = snd_soc_dapm_mixer, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_mixer, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, \
.num_kcontrols = wncontrols, .event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_SWITCH_E(wname, wreg, wshift, winvert, wcontrols, \
wevent, wflags) \
-{ .id = snd_soc_dapm_switch, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_switch, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = 1, \
.event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_MUX_E(wname, wreg, wshift, winvert, wcontrols, \
wevent, wflags) \
-{ .id = snd_soc_dapm_mux, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_mux, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = 1, \
.event = wevent, .event_flags = wflags}
@@ -176,101 +202,121 @@ struct soc_enum;
/* additional sequencing control within an event type */
#define SND_SOC_DAPM_PGA_S(wname, wsubseq, wreg, wshift, winvert, \
wevent, wflags) \
-{ .id = snd_soc_dapm_pga, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_pga, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.event = wevent, .event_flags = wflags, \
.subseq = wsubseq}
#define SND_SOC_DAPM_SUPPLY_S(wname, wsubseq, wreg, wshift, winvert, wevent, \
wflags) \
-{ .id = snd_soc_dapm_supply, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_supply, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.event = wevent, .event_flags = wflags, .subseq = wsubseq}
/* Simplified versions of above macros, assuming wncontrols = ARRAY_SIZE(wcontrols) */
#define SOC_PGA_E_ARRAY(wname, wreg, wshift, winvert, wcontrols, \
wevent, wflags) \
-{ .id = snd_soc_dapm_pga, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_pga, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = ARRAY_SIZE(wcontrols), \
.event = wevent, .event_flags = wflags}
#define SOC_MIXER_E_ARRAY(wname, wreg, wshift, winvert, wcontrols, \
wevent, wflags) \
-{ .id = snd_soc_dapm_mixer, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_mixer, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = ARRAY_SIZE(wcontrols), \
.event = wevent, .event_flags = wflags}
#define SOC_MIXER_NAMED_CTL_E_ARRAY(wname, wreg, wshift, winvert, \
wcontrols, wevent, wflags) \
-{ .id = snd_soc_dapm_mixer, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_mixer, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.kcontrol_news = wcontrols, .num_kcontrols = ARRAY_SIZE(wcontrols), \
.event = wevent, .event_flags = wflags}
/* events that are pre and post DAPM */
#define SND_SOC_DAPM_PRE(wname, wevent) \
-{ .id = snd_soc_dapm_pre, .name = wname, .kcontrol_news = NULL, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_pre, .name = wname, .kcontrol_news = NULL, \
.num_kcontrols = 0, .reg = SND_SOC_NOPM, .event = wevent, \
.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_PRE_PMD}
#define SND_SOC_DAPM_POST(wname, wevent) \
-{ .id = snd_soc_dapm_post, .name = wname, .kcontrol_news = NULL, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_post, .name = wname, .kcontrol_news = NULL, \
.num_kcontrols = 0, .reg = SND_SOC_NOPM, .event = wevent, \
.event_flags = SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD}
/* stream domain */
#define SND_SOC_DAPM_AIF_IN(wname, stname, wchan, wreg, wshift, winvert) \
-{ .id = snd_soc_dapm_aif_in, .name = wname, .sname = stname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_aif_in, .name = wname, .sname = stname, \
.channel = wchan, SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), }
#define SND_SOC_DAPM_AIF_IN_E(wname, stname, wchan, wreg, wshift, winvert, \
wevent, wflags) \
-{ .id = snd_soc_dapm_aif_in, .name = wname, .sname = stname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_aif_in, .name = wname, .sname = stname, \
.channel = wchan, SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.event = wevent, .event_flags = wflags }
#define SND_SOC_DAPM_AIF_OUT(wname, stname, wchan, wreg, wshift, winvert) \
-{ .id = snd_soc_dapm_aif_out, .name = wname, .sname = stname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_aif_out, .name = wname, .sname = stname, \
.channel = wchan, SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), }
#define SND_SOC_DAPM_AIF_OUT_E(wname, stname, wchan, wreg, wshift, winvert, \
wevent, wflags) \
-{ .id = snd_soc_dapm_aif_out, .name = wname, .sname = stname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_aif_out, .name = wname, .sname = stname, \
.channel = wchan, SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.event = wevent, .event_flags = wflags }
#define SND_SOC_DAPM_DAC(wname, stname, wreg, wshift, winvert) \
-{ .id = snd_soc_dapm_dac, .name = wname, .sname = stname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_dac, .name = wname, .sname = stname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert) }
#define SND_SOC_DAPM_DAC_E(wname, stname, wreg, wshift, winvert, \
wevent, wflags) \
-{ .id = snd_soc_dapm_dac, .name = wname, .sname = stname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_dac, .name = wname, .sname = stname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_ADC(wname, stname, wreg, wshift, winvert) \
-{ .id = snd_soc_dapm_adc, .name = wname, .sname = stname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_adc, .name = wname, .sname = stname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), }
#define SND_SOC_DAPM_ADC_E(wname, stname, wreg, wshift, winvert, \
wevent, wflags) \
-{ .id = snd_soc_dapm_adc, .name = wname, .sname = stname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_adc, .name = wname, .sname = stname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_CLOCK_SUPPLY(wname) \
-{ .id = snd_soc_dapm_clock_supply, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_clock_supply, .name = wname, \
.reg = SND_SOC_NOPM, .event = dapm_clock_event, \
.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD }
/* generic widgets */
#define SND_SOC_DAPM_REG(wid, wname, wreg, wshift, wmask, won_val, woff_val) \
-{ .id = wid, .name = wname, .kcontrol_news = NULL, .num_kcontrols = 0, \
+(struct snd_soc_dapm_widget) { \
+ .id = wid, .name = wname, .kcontrol_news = NULL, .num_kcontrols = 0, \
.reg = wreg, .shift = wshift, .mask = wmask, \
.on_val = won_val, .off_val = woff_val, }
#define SND_SOC_DAPM_SUPPLY(wname, wreg, wshift, winvert, wevent, wflags) \
-{ .id = snd_soc_dapm_supply, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_supply, .name = wname, \
SND_SOC_DAPM_INIT_REG_VAL(wreg, wshift, winvert), \
.event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_REGULATOR_SUPPLY(wname, wdelay, wflags) \
-{ .id = snd_soc_dapm_regulator_supply, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_regulator_supply, .name = wname, \
.reg = SND_SOC_NOPM, .shift = wdelay, .event = dapm_regulator_event, \
.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD, \
.on_val = wflags}
#define SND_SOC_DAPM_PINCTRL(wname, active, sleep) \
-{ .id = snd_soc_dapm_pinctrl, .name = wname, \
+(struct snd_soc_dapm_widget) { \
+ .id = snd_soc_dapm_pinctrl, .name = wname, \
.priv = (&(struct snd_soc_dapm_pinctrl_priv) \
{ .active_state = active, .sleep_state = sleep,}), \
.reg = SND_SOC_NOPM, .event = dapm_pinctrl_event, \
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 947473d2da7d..88c3dbe47d71 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -53,6 +53,7 @@ config SND_SOC_ALL_CODECS
imply SND_SOC_AK5558
imply SND_SOC_ALC5623
imply SND_SOC_ALC5632
+ imply SND_SOC_AUDIO_IIO_AUX
imply SND_SOC_AW8738
imply SND_SOC_AW88395
imply SND_SOC_BT_SCO
@@ -614,6 +615,17 @@ config SND_SOC_ALC5632
tristate
depends on I2C
+config SND_SOC_AUDIO_IIO_AUX
+ tristate "Audio IIO Auxiliary device"
+ depends on IIO
+ help
+ Enable support for Industrial I/O devices as audio auxiliary devices.
+ This allows to have an IIO device present in the audio path and
+ controlled using mixer controls.
+
+ To compile this driver as a module, choose M here: the module
+ will be called snd-soc-audio-iio-aux.
+
config SND_SOC_AW8738
tristate "Awinic AW8738 Audio Amplifier"
select GPIOLIB
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index b48a9a323b84..32dcc6de58bd 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -45,6 +45,7 @@ snd-soc-ak4671-objs := ak4671.o
snd-soc-ak5386-objs := ak5386.o
snd-soc-ak5558-objs := ak5558.o
snd-soc-arizona-objs := arizona.o arizona-jack.o
+snd-soc-audio-iio-aux-objs := audio-iio-aux.o
snd-soc-aw8738-objs := aw8738.o
snd-soc-aw88395-lib-objs := aw88395/aw88395_lib.o
snd-soc-aw88395-objs := aw88395/aw88395.o \
@@ -428,6 +429,7 @@ obj-$(CONFIG_SND_SOC_AK5558) += snd-soc-ak5558.o
obj-$(CONFIG_SND_SOC_ALC5623) += snd-soc-alc5623.o
obj-$(CONFIG_SND_SOC_ALC5632) += snd-soc-alc5632.o
obj-$(CONFIG_SND_SOC_ARIZONA) += snd-soc-arizona.o
+obj-$(CONFIG_SND_SOC_AUDIO_IIO_AUX) += snd-soc-audio-iio-aux.o
obj-$(CONFIG_SND_SOC_AW8738) += snd-soc-aw8738.o
obj-$(CONFIG_SND_SOC_AW88395_LIB) += snd-soc-aw88395-lib.o
obj-$(CONFIG_SND_SOC_AW88395) +=snd-soc-aw88395.o
diff --git a/sound/soc/codecs/audio-iio-aux.c b/sound/soc/codecs/audio-iio-aux.c
new file mode 100644
index 000000000000..a8bf14239bd7
--- /dev/null
+++ b/sound/soc/codecs/audio-iio-aux.c
@@ -0,0 +1,344 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// ALSA SoC glue to use IIO devices as audio components
+//
+// Copyright 2023 CS GROUP France
+//
+// Author: Herve Codina <herve.codina@bootlin.com>
+
+#include <linux/iio/consumer.h>
+#include <linux/minmax.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/string_helpers.h>
+
+#include <sound/soc.h>
+#include <sound/tlv.h>
+
+struct audio_iio_aux_chan {
+ struct iio_channel *iio_chan;
+ const char *name;
+ int max;
+ int min;
+ bool is_invert_range;
+};
+
+struct audio_iio_aux {
+ struct device *dev;
+ struct audio_iio_aux_chan *chans;
+ unsigned int num_chans;
+};
+
+static int audio_iio_aux_info_volsw(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ struct audio_iio_aux_chan *chan = (struct audio_iio_aux_chan *)kcontrol->private_value;
+
+ uinfo->count = 1;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = chan->max - chan->min;
+ uinfo->type = (uinfo->value.integer.max == 1) ?
+ SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
+ return 0;
+}
+
+static int audio_iio_aux_get_volsw(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct audio_iio_aux_chan *chan = (struct audio_iio_aux_chan *)kcontrol->private_value;
+ int max = chan->max;
+ int min = chan->min;
+ bool invert_range = chan->is_invert_range;
+ int ret;
+ int val;
+
+ ret = iio_read_channel_raw(chan->iio_chan, &val);
+ if (ret < 0)
+ return ret;
+
+ ucontrol->value.integer.value[0] = val - min;
+ if (invert_range)
+ ucontrol->value.integer.value[0] = max - ucontrol->value.integer.value[0];
+
+ return 0;
+}
+
+static int audio_iio_aux_put_volsw(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct audio_iio_aux_chan *chan = (struct audio_iio_aux_chan *)kcontrol->private_value;
+ int max = chan->max;
+ int min = chan->min;
+ bool invert_range = chan->is_invert_range;
+ int val;
+ int ret;
+ int tmp;
+
+ val = ucontrol->value.integer.value[0];
+ if (val < 0)
+ return -EINVAL;
+ if (val > max - min)
+ return -EINVAL;
+
+ val = val + min;
+ if (invert_range)
+ val = max - val;
+
+ ret = iio_read_channel_raw(chan->iio_chan, &tmp);
+ if (ret < 0)
+ return ret;
+
+ if (tmp == val)
+ return 0;
+
+ ret = iio_write_channel_raw(chan->iio_chan, val);
+ if (ret)
+ return ret;
+
+ return 1; /* The value changed */
+}
+
+static int audio_iio_aux_add_controls(struct snd_soc_component *component,
+ struct audio_iio_aux_chan *chan)
+{
+ struct snd_kcontrol_new control = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = chan->name,
+ .info = audio_iio_aux_info_volsw,
+ .get = audio_iio_aux_get_volsw,
+ .put = audio_iio_aux_put_volsw,
+ .private_value = (unsigned long)chan,
+ };
+
+ return snd_soc_add_component_controls(component, &control, 1);
+}
+
+/*
+ * These data could be on stack but they are pretty big.
+ * As ASoC internally copy them and protect them against concurrent accesses
+ * (snd_soc_bind_card() protects using client_mutex), keep them in the global
+ * data area.
+ */
+static struct snd_soc_dapm_widget widgets[3];
+static struct snd_soc_dapm_route routes[2];
+
+/* Be sure sizes are correct (need 3 widgets and 2 routes) */
+static_assert(ARRAY_SIZE(widgets) >= 3, "3 widgets are needed");
+static_assert(ARRAY_SIZE(routes) >= 2, "2 routes are needed");
+
+static int audio_iio_aux_add_dapms(struct snd_soc_component *component,
+ struct audio_iio_aux_chan *chan)
+{
+ struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
+ char *output_name;
+ char *input_name;
+ char *pga_name;
+ int ret;
+
+ input_name = kasprintf(GFP_KERNEL, "%s IN", chan->name);
+ if (!input_name)
+ return -ENOMEM;
+
+ output_name = kasprintf(GFP_KERNEL, "%s OUT", chan->name);
+ if (!output_name) {
+ ret = -ENOMEM;
+ goto out_free_input_name;
+ }
+
+ pga_name = kasprintf(GFP_KERNEL, "%s PGA", chan->name);
+ if (!pga_name) {
+ ret = -ENOMEM;
+ goto out_free_output_name;
+ }
+
+ widgets[0] = SND_SOC_DAPM_INPUT(input_name);
+ widgets[1] = SND_SOC_DAPM_OUTPUT(output_name);
+ widgets[2] = SND_SOC_DAPM_PGA(pga_name, SND_SOC_NOPM, 0, 0, NULL, 0);
+ ret = snd_soc_dapm_new_controls(dapm, widgets, 3);
+ if (ret)
+ goto out_free_pga_name;
+
+ routes[0].sink = pga_name;
+ routes[0].control = NULL;
+ routes[0].source = input_name;
+ routes[1].sink = output_name;
+ routes[1].control = NULL;
+ routes[1].source = pga_name;
+ ret = snd_soc_dapm_add_routes(dapm, routes, 2);
+
+ /* Allocated names are no more needed (duplicated in ASoC internals) */
+
+out_free_pga_name:
+ kfree(pga_name);
+out_free_output_name:
+ kfree(output_name);
+out_free_input_name:
+ kfree(input_name);
+ return ret;
+}
+
+static int audio_iio_aux_component_probe(struct snd_soc_component *component)
+{
+ struct audio_iio_aux *iio_aux = snd_soc_component_get_drvdata(component);
+ struct audio_iio_aux_chan *chan;
+ int ret;
+ int i;
+
+ for (i = 0; i < iio_aux->num_chans; i++) {
+ chan = iio_aux->chans + i;
+
+ ret = iio_read_max_channel_raw(chan->iio_chan, &chan->max);
+ if (ret)
+ return dev_err_probe(component->dev, ret,
+ "chan[%d] %s: Cannot get max raw value\n",
+ i, chan->name);
+
+ ret = iio_read_min_channel_raw(chan->iio_chan, &chan->min);
+ if (ret)
+ return dev_err_probe(component->dev, ret,
+ "chan[%d] %s: Cannot get min raw value\n",
+ i, chan->name);
+
+ if (chan->min > chan->max) {
+ /*
+ * This should never happen but to avoid any check
+ * later, just swap values here to ensure that the
+ * minimum value is lower than the maximum value.
+ */
+ dev_dbg(component->dev, "chan[%d] %s: Swap min and max\n",
+ i, chan->name);
+ swap(chan->min, chan->max);
+ }
+
+ /* Set initial value */
+ ret = iio_write_channel_raw(chan->iio_chan,
+ chan->is_invert_range ? chan->max : chan->min);
+ if (ret)
+ return dev_err_probe(component->dev, ret,
+ "chan[%d] %s: Cannot set initial value\n",
+ i, chan->name);
+
+ ret = audio_iio_aux_add_controls(component, chan);
+ if (ret)
+ return ret;
+
+ ret = audio_iio_aux_add_dapms(component, chan);
+ if (ret)
+ return ret;
+
+ dev_dbg(component->dev, "chan[%d]: Added %s (min=%d, max=%d, invert=%s)\n",
+ i, chan->name, chan->min, chan->max,
+ str_on_off(chan->is_invert_range));
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_component_driver audio_iio_aux_component_driver = {
+ .probe = audio_iio_aux_component_probe,
+};
+
+static int audio_iio_aux_probe(struct platform_device *pdev)
+{
+ struct audio_iio_aux_chan *iio_aux_chan;
+ struct device *dev = &pdev->dev;
+ struct audio_iio_aux *iio_aux;
+ const char **names;
+ u32 *invert_ranges;
+ int count;
+ int ret;
+ int i;
+
+ iio_aux = devm_kzalloc(dev, sizeof(*iio_aux), GFP_KERNEL);
+ if (!iio_aux)
+ return -ENOMEM;
+
+ iio_aux->dev = dev;
+
+ count = device_property_string_array_count(dev, "io-channel-names");
+ if (count < 0)
+ return dev_err_probe(dev, count, "failed to count io-channel-names\n");
+
+ iio_aux->num_chans = count;
+
+ iio_aux->chans = devm_kmalloc_array(dev, iio_aux->num_chans,
+ sizeof(*iio_aux->chans), GFP_KERNEL);
+ if (!iio_aux->chans)
+ return -ENOMEM;
+
+ names = kcalloc(iio_aux->num_chans, sizeof(*names), GFP_KERNEL);
+ if (!names)
+ return -ENOMEM;
+
+ invert_ranges = kcalloc(iio_aux->num_chans, sizeof(*invert_ranges), GFP_KERNEL);
+ if (!invert_ranges) {
+ ret = -ENOMEM;
+ goto out_free_names;
+ }
+
+ ret = device_property_read_string_array(dev, "io-channel-names",
+ names, iio_aux->num_chans);
+ if (ret < 0) {
+ dev_err_probe(dev, ret, "failed to read io-channel-names\n");
+ goto out_free_invert_ranges;
+ }
+
+ /*
+ * snd-control-invert-range is optional and can contain fewer items
+ * than the number of channels. Unset values default to 0.
+ */
+ count = device_property_count_u32(dev, "snd-control-invert-range");
+ if (count > 0) {
+ count = min_t(unsigned int, count, iio_aux->num_chans);
+ ret = device_property_read_u32_array(dev, "snd-control-invert-range",
+ invert_ranges, count);
+ if (ret < 0) {
+ dev_err_probe(dev, ret, "failed to read snd-control-invert-range\n");
+ goto out_free_invert_ranges;
+ }
+ }
+
+ for (i = 0; i < iio_aux->num_chans; i++) {
+ iio_aux_chan = iio_aux->chans + i;
+ iio_aux_chan->name = names[i];
+ iio_aux_chan->is_invert_range = invert_ranges[i];
+
+ iio_aux_chan->iio_chan = devm_iio_channel_get(dev, iio_aux_chan->name);
+ if (IS_ERR(iio_aux_chan->iio_chan)) {
+ ret = PTR_ERR(iio_aux_chan->iio_chan);
+ dev_err_probe(dev, ret, "get IIO channel '%s' failed\n",
+ iio_aux_chan->name);
+ goto out_free_invert_ranges;
+ }
+ }
+
+ platform_set_drvdata(pdev, iio_aux);
+
+ ret = devm_snd_soc_register_component(dev, &audio_iio_aux_component_driver,
+ NULL, 0);
+out_free_invert_ranges:
+ kfree(invert_ranges);
+out_free_names:
+ kfree(names);
+ return ret;
+}
+
+static const struct of_device_id audio_iio_aux_ids[] = {
+ { .compatible = "audio-iio-aux" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, audio_iio_aux_ids);
+
+static struct platform_driver audio_iio_aux_driver = {
+ .driver = {
+ .name = "audio-iio-aux",
+ .of_match_table = audio_iio_aux_ids,
+ },
+ .probe = audio_iio_aux_probe,
+};
+module_platform_driver(audio_iio_aux_driver);
+
+MODULE_AUTHOR("Herve Codina <herve.codina@bootlin.com>");
+MODULE_DESCRIPTION("IIO ALSA SoC aux driver");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 0745bf6a09aa..a78babf44f38 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -346,6 +346,7 @@ static int __simple_for_each_link(struct asoc_simple_priv *priv,
struct device *dev = simple_priv_to_dev(priv);
struct device_node *top = dev->of_node;
struct device_node *node;
+ struct device_node *add_devs;
uintptr_t dpcm_selectable = (uintptr_t)of_device_get_match_data(dev);
bool is_top = 0;
int ret = 0;
@@ -357,6 +358,8 @@ static int __simple_for_each_link(struct asoc_simple_priv *priv,
is_top = 1;
}
+ add_devs = of_get_child_by_name(top, PREFIX "additional-devs");
+
/* loop for all dai-link */
do {
struct asoc_simple_data adata;
@@ -365,6 +368,12 @@ static int __simple_for_each_link(struct asoc_simple_priv *priv,
struct device_node *np;
int num = of_get_child_count(node);
+ /* Skip additional-devs node */
+ if (node == add_devs) {
+ node = of_get_next_child(top, node);
+ continue;
+ }
+
/* get codec */
codec = of_get_child_by_name(node, is_top ?
PREFIX "codec" : "codec");
@@ -378,12 +387,15 @@ static int __simple_for_each_link(struct asoc_simple_priv *priv,
/* get convert-xxx property */
memset(&adata, 0, sizeof(adata));
- for_each_child_of_node(node, np)
+ for_each_child_of_node(node, np) {
+ if (np == add_devs)
+ continue;
simple_parse_convert(dev, np, &adata);
+ }
/* loop for all CPU/Codec node */
for_each_child_of_node(node, np) {
- if (plat == np)
+ if (plat == np || add_devs == np)
continue;
/*
* It is DPCM
@@ -426,6 +438,7 @@ static int __simple_for_each_link(struct asoc_simple_priv *priv,
} while (!is_top && node);
error:
+ of_node_put(add_devs);
of_node_put(node);
return ret;
}
@@ -463,6 +476,31 @@ static int simple_for_each_link(struct asoc_simple_priv *priv,
return ret;
}
+static void simple_depopulate_aux(void *data)
+{
+ struct asoc_simple_priv *priv = data;
+
+ of_platform_depopulate(simple_priv_to_dev(priv));
+}
+
+static int simple_populate_aux(struct asoc_simple_priv *priv)
+{
+ struct device *dev = simple_priv_to_dev(priv);
+ struct device_node *node;
+ int ret;
+
+ node = of_get_child_by_name(dev->of_node, PREFIX "additional-devs");
+ if (!node)
+ return 0;
+
+ ret = of_platform_populate(node, NULL, NULL, dev);
+ of_node_put(node);
+ if (ret)
+ return ret;
+
+ return devm_add_action_or_reset(dev, simple_depopulate_aux, priv);
+}
+
static int simple_parse_of(struct asoc_simple_priv *priv, struct link_info *li)
{
struct snd_soc_card *card = simple_priv_to_card(priv);
@@ -492,6 +530,10 @@ static int simple_parse_of(struct asoc_simple_priv *priv, struct link_info *li)
if (ret < 0)
return ret;
+ ret = simple_populate_aux(priv);
+ if (ret < 0)
+ return ret;
+
ret = snd_soc_of_parse_aux_devs(card, PREFIX "aux-devs");
return ret;
generated by cgit (git 2.34.1) at 2025-07-14 08:11:17 +0000