Merge series "ASoC: rsnd: tidyup adg and header" from Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>:

Hi Mark

I noticed that adg can be more clean code.
And rsnd.h header comment was not so good
because patch has been randomly added.

This patch tidyup these.

Kuninori Morimoto (5):
  ASoC: rsnd: adg: supply __printf(x, y) formatting for dbg_msg()
  ASoC: rsnd: adg: tidyup rsnd_adg_get_clkin/out() parameter
  ASoC: rsnd: adg: use more simple method for null_clk
  ASoC: rsnd: adg: check return value for rsnd_adg_get_clkin/out()
  ASoC: rsnd: tidyup __rsnd_mod_xxx macro comments

 sound/soc/sh/rcar/adg.c  | 139 +++++++++++++++++++++++++--------------
 sound/soc/sh/rcar/rsnd.h |  21 ++----
 2 files changed, 97 insertions(+), 63 deletions(-)

--
2.25.1

2 files changed, 97 insertions, 63 deletions

diff --git a/sound/soc/sh/rcar/adg.c b/sound/soc/sh/rcar/adg.c
index 78916332c22f..0ebee1ed06a9 100644
--- a/sound/soc/sh/rcar/adg.c
+++ b/sound/soc/sh/rcar/adg.c
@@ -28,6 +28,7 @@ static struct rsnd_mod_ops adg_ops = {
 struct rsnd_adg {
 	struct clk *clk[CLKMAX];
 	struct clk *clkout[CLKOUTMAX];
+	struct clk *null_clk;
 	struct clk_onecell_data onecell;
 	struct rsnd_mod mod;
 	int clk_rate[CLKMAX];
@@ -363,76 +364,103 @@ int rsnd_adg_ssi_clk_try_start(struct rsnd_mod *ssi_mod, unsigned int rate)
 void rsnd_adg_clk_control(struct rsnd_priv *priv, int enable)
 {
 	struct rsnd_adg *adg = rsnd_priv_to_adg(priv);
-	struct device *dev = rsnd_priv_to_dev(priv);
 	struct clk *clk;
 	int i;
 
 	for_each_rsnd_clk(clk, adg, i) {
 		if (enable) {
-			int ret = clk_prepare_enable(clk);
+			clk_prepare_enable(clk);
 
 			/*
 			 * We shouldn't use clk_get_rate() under
 			 * atomic context. Let's keep it when
 			 * rsnd_adg_clk_enable() was called
 			 */
-			adg->clk_rate[i] = 0;
-			if (ret < 0)
-				dev_warn(dev, "can't use clk %d\n", i);
-			else
-				adg->clk_rate[i] = clk_get_rate(clk);
+			adg->clk_rate[i] = clk_get_rate(clk);
 		} else {
-			if (adg->clk_rate[i])
-				clk_disable_unprepare(clk);
-			adg->clk_rate[i] = 0;
+			clk_disable_unprepare(clk);
 		}
 	}
 }
 
-#define NULL_CLK "rsnd_adg_null"
-static struct clk *rsnd_adg_null_clk_get(struct rsnd_priv *priv)
+static struct clk *rsnd_adg_create_null_clk(struct rsnd_priv *priv,
+					    const char * const name,
+					    const char *parent)
 {
 	struct device *dev = rsnd_priv_to_dev(priv);
+	struct clk *clk;
 
-	if (!priv->null_hw) {
-		struct clk_hw *_hw;
-		int ret;
+	clk = clk_register_fixed_rate(dev, name, parent, 0, 0);
+	if (IS_ERR(clk)) {
+		dev_err(dev, "create null clk error\n");
+		return NULL;
+	}
 
-		_hw = clk_hw_register_fixed_rate_with_accuracy(dev, NULL_CLK, NULL, 0, 0, 0);
-		if (IS_ERR(_hw))
-			return NULL;
+	return clk;
+}
+
+static struct clk *rsnd_adg_null_clk_get(struct rsnd_priv *priv)
+{
+	struct rsnd_adg *adg = priv->adg;
 
-		ret = of_clk_add_hw_provider(dev->of_node, of_clk_hw_simple_get, _hw);
-		if (ret < 0)
-			clk_hw_unregister_fixed_rate(_hw);
+	if (!adg->null_clk) {
+		static const char * const name = "rsnd_adg_null";
 
-		priv->null_hw = _hw;
+		adg->null_clk = rsnd_adg_create_null_clk(priv, name, NULL);
 	}
 
-	return clk_hw_get_clk(priv->null_hw, NULL_CLK);
+	return adg->null_clk;
+}
+
+static void rsnd_adg_null_clk_clean(struct rsnd_priv *priv)
+{
+	struct rsnd_adg *adg = priv->adg;
+
+	if (adg->null_clk)
+		clk_unregister_fixed_rate(adg->null_clk);
 }
 
-static void rsnd_adg_get_clkin(struct rsnd_priv *priv,
-			       struct rsnd_adg *adg)
+static int rsnd_adg_get_clkin(struct rsnd_priv *priv)
 {
+	struct rsnd_adg *adg = priv->adg;
 	struct device *dev = rsnd_priv_to_dev(priv);
+	struct clk *clk;
 	int i;
 
 	for (i = 0; i < CLKMAX; i++) {
-		struct clk *clk = devm_clk_get(dev, clk_name[i]);
+		clk = devm_clk_get(dev, clk_name[i]);
 
 		if (IS_ERR(clk))
 			clk = rsnd_adg_null_clk_get(priv);
 		if (IS_ERR(clk))
-			dev_err(dev, "no adg clock (%s)\n", clk_name[i]);
+			goto err;
 
 		adg->clk[i] = clk;
 	}
+
+	return 0;
+
+err:
+	dev_err(dev, "adg clock IN get failed\n");
+
+	rsnd_adg_null_clk_clean(priv);
+
+	return -EIO;
 }
 
-static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
-				struct rsnd_adg *adg)
+static void rsnd_adg_unregister_clkout(struct rsnd_priv *priv)
 {
+	struct rsnd_adg *adg = priv->adg;
+	struct clk *clk;
+	int i;
+
+	for_each_rsnd_clkout(clk, adg, i)
+		clk_unregister_fixed_rate(clk);
+}
+
+static int rsnd_adg_get_clkout(struct rsnd_priv *priv)
+{
+	struct rsnd_adg *adg = priv->adg;
 	struct clk *clk;
 	struct device *dev = rsnd_priv_to_dev(priv);
 	struct device_node *np = dev->of_node;
@@ -472,9 +500,8 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
 
 	req_size = prop->length / sizeof(u32);
 	if (req_size > REQ_SIZE) {
-		dev_err(dev,
-			"too many clock-frequency, use top %d\n", REQ_SIZE);
-		req_size = REQ_SIZE;
+		dev_err(dev, "too many clock-frequency\n");
+		return -EINVAL;
 	}
 
 	of_property_read_u32_array(np, "clock-frequency", req_rate, req_size);
@@ -555,10 +582,11 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
 	if (!count) {
 		clk = clk_register_fixed_rate(dev, clkout_name[CLKOUT],
 					      parent_clk_name, 0, req_rate[0]);
-		if (!IS_ERR(clk)) {
-			adg->clkout[CLKOUT] = clk;
-			of_clk_add_provider(np, of_clk_src_simple_get, clk);
-		}
+		if (IS_ERR(clk))
+			goto err;
+
+		adg->clkout[CLKOUT] = clk;
+		of_clk_add_provider(np, of_clk_src_simple_get, clk);
 	}
 	/*
 	 * for clkout0/1/2/3
@@ -568,8 +596,10 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
 			clk = clk_register_fixed_rate(dev, clkout_name[i],
 						      parent_clk_name, 0,
 						      req_rate[0]);
-			if (!IS_ERR(clk))
-				adg->clkout[i] = clk;
+			if (IS_ERR(clk))
+				goto err;
+
+			adg->clkout[i] = clk;
 		}
 		adg->onecell.clks	= adg->clkout;
 		adg->onecell.clk_num	= CLKOUTMAX;
@@ -581,9 +611,19 @@ rsnd_adg_get_clkout_end:
 	adg->ckr = ckr;
 	adg->rbga = rbga;
 	adg->rbgb = rbgb;
+
+	return 0;
+
+err:
+	dev_err(dev, "adg clock OUT get failed\n");
+
+	rsnd_adg_unregister_clkout(priv);
+
+	return -EIO;
 }
 
 #if defined(DEBUG) || defined(CONFIG_DEBUG_FS)
+__printf(3, 4)
 static void dbg_msg(struct device *dev, struct seq_file *m,
 				   const char *fmt, ...)
 {
@@ -643,11 +683,16 @@ int rsnd_adg_probe(struct rsnd_priv *priv)
 	if (ret)
 		return ret;
 
-	rsnd_adg_get_clkin(priv, adg);
-	rsnd_adg_get_clkout(priv, adg);
-
 	priv->adg = adg;
 
+	ret = rsnd_adg_get_clkin(priv);
+	if (ret)
+		return ret;
+
+	ret = rsnd_adg_get_clkout(priv);
+	if (ret)
+		return ret;
+
 	rsnd_adg_clk_enable(priv);
 	rsnd_adg_clk_dbg_info(priv, NULL);
 
@@ -658,17 +703,13 @@ void rsnd_adg_remove(struct rsnd_priv *priv)
 {
 	struct device *dev = rsnd_priv_to_dev(priv);
 	struct device_node *np = dev->of_node;
-	struct rsnd_adg *adg = priv->adg;
-	struct clk *clk;
-	int i;
 
-	for_each_rsnd_clkout(clk, adg, i)
-		if (adg->clkout[i])
-			clk_unregister_fixed_rate(adg->clkout[i]);
-	if (priv->null_hw)
-		clk_hw_unregister_fixed_rate(priv->null_hw);
+	rsnd_adg_unregister_clkout(priv);
 
 	of_clk_del_provider(np);
 
 	rsnd_adg_clk_disable(priv);
+
+	/* It should be called after rsnd_adg_clk_disable() */
+	rsnd_adg_null_clk_clean(priv);
 }
diff --git a/sound/soc/sh/rcar/rsnd.h b/sound/soc/sh/rcar/rsnd.h
index b2fbe3bbaabd..6580bab0e229 100644
--- a/sound/soc/sh/rcar/rsnd.h
+++ b/sound/soc/sh/rcar/rsnd.h
@@ -364,19 +364,13 @@ struct rsnd_mod {
 /*
  * status
  *
- * 0xH0000CB0
+ * 0xH000DCB0
  *
  * B	0: init		1: quit
  * C	0: start	1: stop
  * D	0: hw_params	1: hw_free
  *
  * H is always called (see __rsnd_mod_call)
- * H	0: probe	1: remove
- * H	0: pcm_new
- * H	0: fallback
- * H	0: pointer
- * H	0: prepare
- * H	0: cleanup
  */
 #define __rsnd_mod_shift_init		4
 #define __rsnd_mod_shift_quit		4
@@ -412,16 +406,16 @@ struct rsnd_mod {
 #define __rsnd_mod_call_remove		0
 #define __rsnd_mod_call_prepare		0
 #define __rsnd_mod_call_cleanup		0
-#define __rsnd_mod_call_init		0
-#define __rsnd_mod_call_quit		1
-#define __rsnd_mod_call_start		0
-#define __rsnd_mod_call_stop		1
+#define __rsnd_mod_call_init		0 /* needs protect */
+#define __rsnd_mod_call_quit		1 /* needs protect */
+#define __rsnd_mod_call_start		0 /* needs protect */
+#define __rsnd_mod_call_stop		1 /* needs protect */
+#define __rsnd_mod_call_hw_params	0 /* needs protect */
+#define __rsnd_mod_call_hw_free		1 /* needs protect */
 #define __rsnd_mod_call_irq		0
 #define __rsnd_mod_call_pcm_new		0
 #define __rsnd_mod_call_fallback	0
-#define __rsnd_mod_call_hw_params	0
 #define __rsnd_mod_call_pointer		0
-#define __rsnd_mod_call_hw_free		1
 
 #define rsnd_mod_to_priv(mod)	((mod)->priv)
 #define rsnd_mod_power_on(mod)	clk_enable((mod)->clk)
@@ -646,7 +640,6 @@ struct rsnd_priv {
 	 * below value will be filled on rsnd_adg_probe()
 	 */
 	void *adg;
-	struct clk_hw *null_hw;
 
 	/*
 	 * below value will be filled on rsnd_dma_probe()