[PATCH v5 10/14] ASoC: rsnd: Add ADG reset support for RZ/G3E

[John Madieu <john.madieu@gmail.com>]

RZ/G3E requires the ADG reset line to be deasserted for the audio
subsystem to operate. The ADG module clock is already managed via
rsnd_adg_clk_enable/disable() through adg->adg, so no additional
clock handling is needed.

Add support for the optional "adg" reset control on Renesas RZ/G3E SoC.

Signed-off-by: John Madieu <john.madieu.xa@bp.renesas.com>
---

Changes:

v5: No changes

v4:
 - Collapse dev_err_probe() and rsnd_mod_init() calls to single lines

v3: No changes
v2: No changes

 sound/soc/renesas/rcar/adg.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sound/soc/renesas/rcar/adg.c b/sound/soc/renesas/rcar/adg.c
index 0105c60a144e..813ad5eabba6 100644
--- a/sound/soc/renesas/rcar/adg.c
+++ b/sound/soc/renesas/rcar/adg.c
@@ -771,6 +771,7 @@ void rsnd_adg_clk_dbg_info(struct rsnd_priv *priv, struct seq_file *m)
 
 int rsnd_adg_probe(struct rsnd_priv *priv)
 {
+	struct reset_control *rstc;
 	struct rsnd_adg *adg;
 	struct device *dev = rsnd_priv_to_dev(priv);
 	int ret;
@@ -779,8 +780,11 @@ int rsnd_adg_probe(struct rsnd_priv *priv)
 	if (!adg)
 		return -ENOMEM;
 
-	ret = rsnd_mod_init(priv, &adg->mod, &adg_ops,
-		      NULL, NULL, 0, 0);
+	rstc = devm_reset_control_get_optional_exclusive(dev, "adg");
+	if (IS_ERR(rstc))
+		return dev_err_probe(dev, PTR_ERR(rstc), "failed to get adg reset\n");
+
+	ret = rsnd_mod_init(priv, &adg->mod, &adg_ops, NULL, rstc, 0, 0);
 	if (ret)
 		return ret;
 
-- 
2.25.1