ASoC: rsnd: Add SSI reset support for RZ/G3E platform

Acquire the per-SSI reset controller and pass it through
rsnd_mod_init() so it is wired into the rsnd_mod->rstc plumbing.

The RZ/G3E SoC exposes one reset line per SSI instance. Use the
indexed-name rsnd_devm_reset_control_get_optional_indexed() helper
so the same code accepts both the hyphenated RZ/G3E names
("ssi-0", "ssi-1", ...) and the legacy dotted names used by R-Car
("ssi.0", ...).

The helper returns NULL when no reset is described in DT, leaving
existing R-Car generations unaffected.

Signed-off-by: John Madieu <john.madieu.xa@bp.renesas.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://patch.msgid.link/20260525110230.4014435-12-john.madieu.xa@bp.renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/renesas/rcar/ssi.c b/sound/soc/renesas/rcar/ssi.c
index cf98cc9ee44c3dc5cacb8d55a1115362729850da..e6734671328c8f4005a8a209816637fe55f4a5a6 100644 (file)
--- a/sound/soc/renesas/rcar/ssi.c
+++ b/sound/soc/renesas/rcar/ssi.c
@@ -1157,6 +1157,7 @@ int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod)
 
 int rsnd_ssi_probe(struct rsnd_priv *priv)
 {
+       struct reset_control *rstc;
        struct device_node *node;
        struct device *dev = rsnd_priv_to_dev(priv);
        struct rsnd_mod_ops *ops;
@@ -1202,6 +1203,17 @@ int rsnd_ssi_probe(struct rsnd_priv *priv)
                        goto rsnd_ssi_probe_done;
                }
 
+               /*
+                * RZ/G3E uses per-SSI reset controllers.
+                * R-Car platforms typically don't have SSI reset controls.
+                */
+               rstc = rsnd_devm_reset_control_get_optional_indexed(dev,
+                                                                   SSI_NAME, i);
+               if (IS_ERR(rstc)) {
+                       ret = PTR_ERR(rstc);
+                       goto rsnd_ssi_probe_done;
+               }
+
                if (of_property_read_bool(np, "shared-pin"))
                        rsnd_flags_set(ssi, RSND_SSI_CLK_PIN_SHARE);
 
@@ -1220,7 +1232,7 @@ int rsnd_ssi_probe(struct rsnd_priv *priv)
                        ops = &rsnd_ssi_dma_ops;
 
                ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk,
-                                   NULL, RSND_MOD_SSI, i);
+                                   rstc, RSND_MOD_SSI, i);
                if (ret)
                        goto rsnd_ssi_probe_done;