drivers: implement config_list()

[libsigrok.git] / hardware / alsa / api.c

diff --git a/hardware/alsa/api.c b/hardware/alsa/api.c
index 4349bc813196660fc64d4118b4004125806ab798..594b95e85bf4c749462f9f2a7b30eacbea5398a3 100644 (file)
--- a/hardware/alsa/api.c
+++ b/hardware/alsa/api.c
@@ -189,6 +189,30 @@ static int config_set(int id, const void *value, const struct sr_dev_inst *sdi)
        return SR_OK;
 }
 
+static int config_list(int key, const void **data, const struct sr_dev_inst *sdi)
+{
+       struct dev_context *devc;
+
+       (void)sdi;
+
+       switch (key) {
+       case SR_CONF_SAMPLERATE:
+               if (!sdi || !sdi->priv)
+                       return SR_ERR_ARG;
+               devc = sdi->priv;
+               if (!devc->supp_rates.list) {
+                       sr_err("Instance did not contain a samplerate list.");
+                       return SR_ERR_ARG;
+               }
+               *data = &devc->supp_rates;
+               break;
+       default:
+               return SR_ERR_ARG;
+       }
+
+       return SR_OK;
+}
+
 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
                                    void *cb_data)
 {
@@ -322,6 +346,7 @@ SR_PRIV struct sr_dev_driver alsa_driver_info = {
        .dev_clear = clear_instances,
        .config_get = config_get,
        .config_set = config_set,
+       .config_list = config_list,
        .dev_open = hw_dev_open,
        .dev_close = hw_dev_close,
        .dev_acquisition_start = hw_dev_acquisition_start,