linux-kernel - [PATCH] ASoC: simple-card: add trigger-stop entry parser

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Date:   Thu, 13 Jul 2023 22:39:04 +0300
From:   Maxim Kochetkov <fido_max@...ox.ru>
To:     alsa-devel@...a-project.org
Cc:     Maxim Kochetkov <fido_max@...ox.ru>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Herve Codina <herve.codina@...tlin.com>,
        Sameer Pujar <spujar@...dia.com>,
        Astrid Rost <astrid.rost@...s.com>,
        Aidan MacDonald <aidanmacdonald.0x0@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] ASoC: simple-card: add trigger-stop entry parser

It may be useful to specify trigger-stop for some DMA-based simple
audio card. So add this "trigger-stop" device tree entry parser.

Signed-off-by: Maxim Kochetkov <fido_max@...ox.ru>
---
 sound/soc/generic/simple-card.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index a78babf44f38..86df7d326068 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -145,8 +145,27 @@ static int simple_parse_node(struct asoc_simple_priv *priv,
 	struct snd_soc_dai_link_component *dlc;
 	struct asoc_simple_dai *dai;
 	int ret;
+	const char *str;
+	struct {
+		char *name;
+		unsigned int val;
+	} of_trigger_table[] = {
+		{ "default",	SND_SOC_TRIGGER_ORDER_DEFAULT },
+		{ "ldc",	SND_SOC_TRIGGER_ORDER_LDC },
+	};
+
 
 	if (cpu) {
+		ret = of_property_read_string(np, "trigger-stop", &str);
+		if (ret == 0) {
+			for (int i = 0; i < ARRAY_SIZE(of_trigger_table); i++) {
+				if (strcmp(str, of_trigger_table[i].name) == 0) {
+					dai_link->trigger_stop = of_trigger_table[i].val;
+					break;
+				}
+			}
+		}
+
 		dlc = asoc_link_to_cpu(dai_link, 0);
 		dai = simple_props_to_dai_cpu(dai_props, 0);
 	} else {
-- 
2.40.1