audioinjector-octo: Add continuous clock feature

[mirror_ubuntu-bionic-kernel.git] / sound / soc / bcm / audioinjector-octo-soundcard.c

diff --git a/sound/soc/bcm/audioinjector-octo-soundcard.c b/sound/soc/bcm/audioinjector-octo-soundcard.c
index 5e79f4eff93a21ed3495c77a90f73525695cb3d5..2ad83c40473f91223b63418cfa8f291ab7bf17af 100644 (file)
--- a/sound/soc/bcm/audioinjector-octo-soundcard.c
+++ b/sound/soc/bcm/audioinjector-octo-soundcard.c
@@ -29,6 +29,7 @@
 static struct gpio_descs *mult_gpios;
 static struct gpio_desc *codec_rst_gpio;
 static unsigned int audioinjector_octo_rate;
+static bool non_stop_clocks;
 
 static const unsigned int audioinjector_octo_rates[] = {
        96000, 48000, 32000, 24000, 16000, 8000, 88200, 44100, 29400, 22050, 14700,
@@ -133,12 +134,16 @@ static int audioinjector_octo_hw_params(struct snd_pcm_substream *substream,
 static int audioinjector_octo_trigger(struct snd_pcm_substream *substream,
                                                                int cmd){
        int mult[4];
-       mult[0] = 0;
-       mult[1] = 0;
-       mult[2] = 0;
-       mult[3] = 0;
+
+       memset(mult, 0, sizeof(mult));
 
        switch (cmd) {
+       case SNDRV_PCM_TRIGGER_STOP:
+       case SNDRV_PCM_TRIGGER_SUSPEND:
+       case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+               if (!non_stop_clocks)
+                       break;
+               /* Drop through... */
        case SNDRV_PCM_TRIGGER_START:
        case SNDRV_PCM_TRIGGER_RESUME:
        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
@@ -177,10 +182,6 @@ static int audioinjector_octo_trigger(struct snd_pcm_substream *substream,
                        return -EINVAL;
                }
                break;
-       case SNDRV_PCM_TRIGGER_STOP:
-       case SNDRV_PCM_TRIGGER_SUSPEND:
-       case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
-               break;
        default:
                return -EINVAL;
        }
@@ -276,6 +277,8 @@ static int audioinjector_octo_probe(struct platform_device *pdev)
                if (IS_ERR(codec_rst_gpio))
                        return PTR_ERR(codec_rst_gpio);
 
+               non_stop_clocks = of_property_read_bool(pdev->dev.of_node, "non-stop-clocks");
+
                if (codec_rst_gpio)
                        gpiod_set_value(codec_rst_gpio, 1);
                msleep(500);