ASoC: rsnd: add rsnd_ssi_busif_err_status_clear()

Current ssi.c clears BUSIF error status at __rsnd_ssi_interrupt(),
but its code is verbose.
This patch off-load it to rsnd_ssi_busif_err_status_clear().

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/8735w11jso.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/rcar/ssi.c

@@ -359,6 +359,55 @@ static void rsnd_ssi_master_clk_stop(struct rsnd_mod *mod,
 	rsnd_adg_ssi_clk_stop(mod);
 }
 
+static bool rsnd_ssi_busif_err_status_clear(struct rsnd_mod *mod)
+{
+	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+	struct device *dev = rsnd_priv_to_dev(priv);
+	u32 status;
+	bool stop = false;
+	int id = rsnd_mod_id(mod);
+	int i;
+
+	switch (id) {
+	case 0:
+	case 1:
+	case 2:
+	case 3:
+	case 4:
+		for (i = 0; i < 4; i++) {
+			status = rsnd_mod_read(mod, SSI_SYS_STATUS(i * 2));
+			status &= 0xf << (id * 4);
+
+			if (status) {
+				rsnd_dbg_irq_status(dev, "%s err status : 0x%08x\n",
+						    rsnd_mod_name(mod), status);
+				rsnd_mod_write(mod,
+					       SSI_SYS_STATUS(i * 2),
+					       0xf << (id * 4));
+				stop = true;
+			}
+		}
+		break;
+	case 9:
+		for (i = 0; i < 4; i++) {
+			status = rsnd_mod_read(mod, SSI_SYS_STATUS((i * 2) + 1));
+			status &= 0xf << 4;
+
+			if (status) {
+				rsnd_dbg_irq_status(dev, "%s err status : 0x%08x\n",
+						    rsnd_mod_name(mod), status);
+				rsnd_mod_write(mod,
+					       SSI_SYS_STATUS((i * 2) + 1),
+					       0xf << 4);
+				stop = true;
+			}
+		}
+		break;
+	}
+
+	return stop;
+}
+
 static void rsnd_ssi_config_init(struct rsnd_mod *mod,
 				struct rsnd_dai_stream *io)
 {
@@ -748,8 +797,6 @@ static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
 	u32 status;
 	bool elapsed = false;
 	bool stop = false;
-	int id = rsnd_mod_id(mod);
-	int i;
 	int is_tdm, is_tdm_split;
 
 	is_tdm		= rsnd_runtime_is_tdm(io);
@@ -775,50 +822,8 @@ static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
 		stop = true;
 	}
 
-	status = 0;
-
-	if (is_tdm || is_tdm_split) {
-		switch (id) {
-		case 0:
-		case 1:
-		case 2:
-		case 3:
-		case 4:
-			for (i = 0; i < 4; i++) {
-				status = rsnd_mod_read(mod,
-						       SSI_SYS_STATUS(i * 2));
-				status &= 0xf << (id * 4);
-
-				if (status) {
-					rsnd_dbg_irq_status(dev,
-						"%s err status : 0x%08x\n",
-						rsnd_mod_name(mod), status);
-					rsnd_mod_write(mod,
-						       SSI_SYS_STATUS(i * 2),
-						       0xf << (id * 4));
-					stop = true;
-				}
-			}
-			break;
-		case 9:
-			for (i = 0; i < 4; i++) {
-				status = rsnd_mod_read(mod,
-						SSI_SYS_STATUS((i * 2) + 1));
-				status &= 0xf << 4;
-
-				if (status) {
-					rsnd_dbg_irq_status(dev,
-						"%s err status : 0x%08x\n",
-						rsnd_mod_name(mod), status);
-					rsnd_mod_write(mod,
-						SSI_SYS_STATUS((i * 2) + 1),
-						0xf << 4);
-					stop = true;
-				}
-			}
-			break;
-		}
-	}
+	if (is_tdm || is_tdm_split)
+		stop |= rsnd_ssi_busif_err_status_clear(mod);
 
 	rsnd_ssi_status_clear(mod);
 rsnd_ssi_interrupt_out: