+static int
+asoc_simple_card_sub_parse_of(struct device_node *np,
+ struct asoc_simple_dai *dai,
+ struct device_node **node)
+{
+ struct clk *clk;
+ int ret;
+
+ /*
+ * get node via "sound-dai = <&phandle port>"
+ * it will be used as xxx_of_node on soc_bind_dai_link()
+ */
+ *node = of_parse_phandle(np, "sound-dai", 0);
+ if (!*node)
+ return -ENODEV;
+
+ /* get dai->name */
+ ret = snd_soc_of_get_dai_name(np, &dai->name);
+ if (ret < 0)
+ goto parse_error;
+
+ /*
+ * bitclock-inversion, frame-inversion
+ * bitclock-master, frame-master
+ * and specific "format" if it has
+ */
+ dai->fmt = snd_soc_of_parse_daifmt(np, NULL);
+
+ /*
+ * dai->sysclk come from
+ * "clocks = <&xxx>" (if system has common clock)
+ * or "system-clock-frequency = <xxx>"
+ * or device's module clock.
+ */
+ if (of_property_read_bool(np, "clocks")) {
+ clk = of_clk_get(np, 0);
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ goto parse_error;
+ }
+
+ dai->sysclk = clk_get_rate(clk);
+ } else if (of_property_read_bool(np, "system-clock-frequency")) {
+ of_property_read_u32(np,
+ "system-clock-frequency",
+ &dai->sysclk);
+ } else {
+ clk = of_clk_get(*node, 0);
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ goto parse_error;
+ }
+
+ dai->sysclk = clk_get_rate(clk);
+ }
+
+ ret = 0;
+
+parse_error:
+ of_node_put(*node);
+
+ return ret;
+}
+
+static int asoc_simple_card_parse_of(struct device_node *node,
+ struct asoc_simple_card_info *info,
+ struct device *dev,
+ struct device_node **of_cpu,
+ struct device_node **of_codec,
+ struct device_node **of_platform)
+{
+ struct device_node *np;
+ char *name;
+ int ret;
+
+ /* get CPU/CODEC common format via simple-audio-card,format */
+ info->daifmt = snd_soc_of_parse_daifmt(node, "simple-audio-card,") &
+ (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK);
+
+ /* DAPM routes */
+ ret = snd_soc_of_parse_audio_routing(&info->snd_card,
+ "simple-audio-routing");
+ if (ret)
+ return ret;
+
+ /* CPU sub-node */
+ ret = -EINVAL;
+ np = of_get_child_by_name(node, "simple-audio-card,cpu");
+ if (np)
+ ret = asoc_simple_card_sub_parse_of(np,
+ &info->cpu_dai,
+ of_cpu);
+ if (ret < 0)
+ return ret;
+
+ /* CODEC sub-node */
+ ret = -EINVAL;
+ np = of_get_child_by_name(node, "simple-audio-card,codec");
+ if (np)
+ ret = asoc_simple_card_sub_parse_of(np,
+ &info->codec_dai,
+ of_codec);
+ if (ret < 0)
+ return ret;
+
+ if (!info->cpu_dai.name || !info->codec_dai.name)
+ return -EINVAL;
+
+ /* card name is created from CPU/CODEC dai name */
+ name = devm_kzalloc(dev,
+ strlen(info->cpu_dai.name) +
+ strlen(info->codec_dai.name) + 2,
+ GFP_KERNEL);
+ sprintf(name, "%s-%s", info->cpu_dai.name, info->codec_dai.name);
+ info->name = info->card = name;
+
+ /* simple-card assumes platform == cpu */
+ *of_platform = *of_cpu;
+
+ dev_dbg(dev, "card-name : %s\n", info->card);
+ dev_dbg(dev, "platform : %04x\n", info->daifmt);
+ dev_dbg(dev, "cpu : %s / %04x / %d\n",
+ info->cpu_dai.name,
+ info->cpu_dai.fmt,
+ info->cpu_dai.sysclk);
+ dev_dbg(dev, "codec : %s / %04x / %d\n",
+ info->codec_dai.name,
+ info->codec_dai.fmt,
+ info->codec_dai.sysclk);
+
+ return 0;
+}
+