ASoC: simple-amplifier: gpio-audio-amp: Add support for extra power supplies

The gpio-audio-amp devices can use additional power supplies:
  - vddio,
  - vdda1,
  - vdda2

Add support for those additional power supplies.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Link: https://patch.msgid.link/20260513081702.317117-11-herve.codina@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/simple-amplifier.c b/sound/soc/codecs/simple-amplifier.c
index 1704cdbb7de5d94e67e48c42571aee73505177e2..89e7e9e53b037482500a701e6881c97a347e89e1 100644 (file)
--- a/sound/soc/codecs/simple-amplifier.c
+++ b/sound/soc/codecs/simple-amplifier.c
@@ -15,6 +15,7 @@
 struct simple_amp_data {
        unsigned int supports;
 #define SIMPLE_AUDIO_SUPPORT_PGA               BIT(0)
+#define SIMPLE_AUDIO_SUPPORT_POWER_SUPPLIES    BIT(1)
 
        const struct snd_soc_dapm_widget *dapm_widgets;
        unsigned int num_dapm_widgets;
@@ -127,10 +128,86 @@ static int simple_amp_add_basic_dapm(struct snd_soc_component *component)
        return 0;
 }
 
+struct simple_amp_supply {
+       const char *prop_name;
+       const struct snd_soc_dapm_widget dapm_widget;
+       const struct snd_soc_dapm_route dapm_route;
+};
+
+static const struct simple_amp_supply simple_amp_supplies[] = {
+       {
+               .prop_name = "vddio-supply",
+               .dapm_widget = SND_SOC_DAPM_REGULATOR_SUPPLY("vddio", 0, 0),
+               .dapm_route = { "PGA", NULL, "vddio" },
+       }, {
+               .prop_name = "vdda1-supply",
+               .dapm_widget = SND_SOC_DAPM_REGULATOR_SUPPLY("vdda1", 0, 0),
+               .dapm_route = { "PGA", NULL, "vdda1" },
+       }, {
+               .prop_name = "vdda2-supply",
+               .dapm_widget = SND_SOC_DAPM_REGULATOR_SUPPLY("vdda2", 0, 0),
+               .dapm_route = { "PGA", NULL, "vdda2" },
+       },
+       { /* End of list */}
+};
+
+static int simple_amp_add_power_supplies(struct snd_soc_component *component)
+{
+       struct snd_soc_dapm_context *dapm = snd_soc_component_to_dapm(component);
+       struct simple_amp *simple_amp = snd_soc_component_get_drvdata(component);
+       const struct simple_amp_supply *supply;
+       struct device *dev = component->dev;
+       int ret;
+
+       /*
+        * Those additional power supplies are attached to the PGA.
+        * If PGA is not supported, simply skipped them.
+        */
+       if (!(simple_amp->data->supports & SIMPLE_AUDIO_SUPPORT_PGA)) {
+               dev_err(dev, "Extra power supplied need PGA\n");
+               return -EINVAL;
+       }
+
+       supply = simple_amp_supplies;
+       do {
+               if (!of_property_present(dev->of_node, supply->prop_name))
+                       continue;
+
+               ret = snd_soc_dapm_new_controls(dapm, &supply->dapm_widget, 1);
+               if (ret) {
+                       dev_err(dev, "Failed to add control for '%s' (%d)\n",
+                               supply->prop_name, ret);
+                       return ret;
+               }
+               ret = snd_soc_dapm_add_routes(dapm, &supply->dapm_route, 1);
+               if (ret) {
+                       dev_err(dev, "Failed to add route for '%s' (%d)\n",
+                               supply->prop_name, ret);
+                       return ret;
+               }
+       } while ((++supply)->prop_name);
+
+       return 0;
+}
+
 static int simple_amp_component_probe(struct snd_soc_component *component)
 {
+       struct simple_amp *simple_amp = snd_soc_component_get_drvdata(component);
+       int ret;
+
        /* Add basic dapm widgets and routes */
-       return simple_amp_add_basic_dapm(component);
+       ret = simple_amp_add_basic_dapm(component);
+       if (ret)
+               return ret;
+
+       /* Add additional power supplies */
+       if (simple_amp->data->supports & SIMPLE_AUDIO_SUPPORT_POWER_SUPPLIES) {
+               ret = simple_amp_add_power_supplies(component);
+               if (ret)
+                       return ret;
+       }
+
+       return 0;
 }
 
 static const struct snd_soc_component_driver simple_amp_component_driver = {
@@ -170,7 +247,8 @@ static const struct simple_amp_data simple_audio_amplifier_data = {
 };
 
 static const struct simple_amp_data simple_audio_mono_pga_data = {
-       .supports               = SIMPLE_AUDIO_SUPPORT_PGA,
+       .supports               = SIMPLE_AUDIO_SUPPORT_PGA |
+                                 SIMPLE_AUDIO_SUPPORT_POWER_SUPPLIES,
        .dapm_widgets           = simple_amp_mono_pga_dapm_widgets,
        .num_dapm_widgets       = ARRAY_SIZE(simple_amp_mono_pga_dapm_widgets),
        .dapm_routes            = simple_amp_mono_pga_dapm_routes,
@@ -178,7 +256,8 @@ static const struct simple_amp_data simple_audio_mono_pga_data = {
 };
 
 static const struct simple_amp_data simple_audio_stereo_pga_data = {
-       .supports               = SIMPLE_AUDIO_SUPPORT_PGA,
+       .supports               = SIMPLE_AUDIO_SUPPORT_PGA |
+                                 SIMPLE_AUDIO_SUPPORT_POWER_SUPPLIES,
        .dapm_widgets           = simple_amp_stereo_pga_dapm_widgets,
        .num_dapm_widgets       = ARRAY_SIZE(simple_amp_stereo_pga_dapm_widgets),
        .dapm_routes            = simple_amp_stereo_pga_dapm_routes,