[PATCH 0/3] Fix some minor issues in simple card driver

[PATCH 0/3] Fix some minor issues in simple card driver

[Nicolin Chen]

The series fixes one name limitation and code style problems.

Nicolin Chen (3):
  ASoC: simple-card: Drop node->name checking
  ASoC: simple-card: Simplify error msg in simple_card_dai_link_of()
  ASoC: simple-card: Improve coding style

 sound/soc/generic/simple-card.c | 32 ++++++++++++++------------------
 1 file changed, 14 insertions(+), 18 deletions(-)

-- 
1.8.4

[PATCH 1/3] ASoC: simple-card: Drop node->name checking

[Nicolin Chen]

The current simple-card driver limits the DT node name to "sound".
Any of other names is forbidden while actually we should allow DT
to pass other node names.

And if this function is being called, the node must already have
the compatible "simple-audio-card" in DTB. So there should be no
need to check the name here.

Signed-off-by: Nicolin Chen <Guangyu.Chen@freescale.com>
---
 sound/soc/generic/simple-card.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 3f2e580..383a4a1 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -156,8 +156,7 @@ static int simple_card_dai_link_of(struct device_node *node,
 	char *prefix = "";
 	int ret;
 
-	if (!strcmp("sound", node->name))
-		prefix = "simple-audio-card,";
+	prefix = "simple-audio-card,";
 
 	daifmt = snd_soc_of_parse_daifmt(node, prefix,
 					 &bitclkmaster, &framemaster);
-- 
1.8.4

Re: [PATCH 1/3] ASoC: simple-card: Drop node->name checking

[Jyri Sarha]

On 04/24/2014 02:13 PM, Nicolin Chen wrote:
> The current simple-card driver limits the DT node name to "sound".
> Any of other names is forbidden while actually we should allow DT
> to pass other node names.
>
> And if this function is being called, the node must already have
> the compatible "simple-audio-card" in DTB. So there should be no
> need to check the name here.
>
> Signed-off-by: Nicolin Chen <Guangyu.Chen@freescale.com>
> ---
>   sound/soc/generic/simple-card.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
> index 3f2e580..383a4a1 100644
> --- a/sound/soc/generic/simple-card.c
> +++ b/sound/soc/generic/simple-card.c
> @@ -156,8 +156,7 @@ static int simple_card_dai_link_of(struct device_node *node,
>   	char *prefix = "";
>   	int ret;
>
> -	if (!strcmp("sound", node->name))
> -		prefix = "simple-audio-card,";
> +	prefix = "simple-audio-card,";
>
>   	daifmt = snd_soc_of_parse_daifmt(node, prefix,
>   					 &bitclkmaster, &framemaster);
>

I think you have missed the point of selecting the prefix based on the 
node name.

Before the change the "simple-audio-card,"-prefix was only needed for 
dai-link properties and subnodes if the dai-link node was omitted in a 
single dai-link setup.

After your change the prefix is also needed for the properties and 
subnodes inside dai-link subnodes.

See the details in: Documentation/devicetree/bindings/sound/simple-card.txt

Maybe the implementation could have been more explicit, but I think the 
old behavior is more convenient. If we anyway decide to go with this 
change then at least the DT binding document should be updated.

Best regards,
Jyri

Re: [PATCH 1/3] ASoC: simple-card: Drop node->name checking

[Mark Brown]

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On Thu, Apr 24, 2014 at 03:47:59PM +0300, Jyri Sarha wrote:
> On 04/24/2014 02:13 PM, Nicolin Chen wrote:

Please delete unneeded context from your mails...

> >-	if (!strcmp("sound", node->name))
> >-		prefix = "simple-audio-card,";
> >+	prefix = "simple-audio-card,";

> I think you have missed the point of selecting the prefix based on the node
> name.

...

> Maybe the implementation could have been more explicit, but I think the old
> behavior is more convenient. If we anyway decide to go with this change then
> at least the DT binding document should be updated.

Yes, the implementation needs to be *way* more explicit - I'd expect a
parameter/variable saying which level we're at depending on where we're
at in the parse rather than guessing based on the node name.

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Re: [PATCH 1/3] ASoC: simple-card: Drop node->name checking

[Jyri Sarha]

On 04/24/2014 04:03 PM, Mark Brown wrote:
> On Thu, Apr 24, 2014 at 03:47:59PM +0300, Jyri Sarha wrote:
>> On 04/24/2014 02:13 PM, Nicolin Chen wrote:
>
> Please delete unneeded context from your mails...
>
>>> -	if (!strcmp("sound", node->name))
>>> -		prefix = "simple-audio-card,";
>>> +	prefix = "simple-audio-card,";
>
>> I think you have missed the point of selecting the prefix based on the node
>> name.
>
> ...
>
>> Maybe the implementation could have been more explicit, but I think the old
>> behavior is more convenient. If we anyway decide to go with this change then
>> at least the DT binding document should be updated.
>
> Yes, the implementation needs to be *way* more explicit - I'd expect a
> parameter/variable saying which level we're at depending on where we're
> at in the parse rather than guessing based on the node name.
>

Ok, I'll come up with a patch soon.

Best regards,
Jyri

[PATCH 2/3] ASoC: simple-card: Simplify error msg in simple_card_dai_link_of()

[Nicolin Chen]

It would look better to use prop instead.

Signed-off-by: Nicolin Chen <Guangyu.Chen@freescale.com>
---
 sound/soc/generic/simple-card.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 383a4a1..c091557 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -166,8 +166,7 @@ static int simple_card_dai_link_of(struct device_node *node,
 	np = of_get_child_by_name(node, prop);
 	if (!np) {
 		ret = -EINVAL;
-		dev_err(dev, "%s: Can't find simple-audio-card,cpu DT node\n",
-			__func__);
+		dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
 		goto dai_link_of_err;
 	}
 
@@ -198,8 +197,7 @@ static int simple_card_dai_link_of(struct device_node *node,
 	np = of_get_child_by_name(node, prop);
 	if (!np) {
 		ret = -EINVAL;
-		dev_err(dev, "%s: Can't find simple-audio-card,codec DT node\n",
-			__func__);
+		dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
 		goto dai_link_of_err;
 	}
 
-- 
1.8.4

[PATCH 3/3] ASoC: simple-card: Improve coding style

[Nicolin Chen]

Improve indentation and space.

Signed-off-by: Nicolin Chen <Guangyu.Chen@freescale.com>
---
 sound/soc/generic/simple-card.c | 23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index c091557..98f97e5 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -66,8 +66,7 @@ err:
 
 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
 {
-	struct simple_card_data *priv =
-				snd_soc_card_get_drvdata(rtd->card);
+	struct simple_card_data *priv =	snd_soc_card_get_drvdata(rtd->card);
 	struct snd_soc_dai *codec = rtd->codec_dai;
 	struct snd_soc_dai *cpu = rtd->cpu_dai;
 	struct simple_dai_props *dai_props;
@@ -177,7 +176,7 @@ static int simple_card_dai_link_of(struct device_node *node,
 		goto dai_link_of_err;
 
 	dai_props->cpu_dai.fmt = daifmt;
-	switch (((np == bitclkmaster)<<4)|(np == framemaster)) {
+	switch (((np == bitclkmaster) << 4) | (np == framemaster)) {
 	case 0x11:
 		dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBS_CFS;
 		break;
@@ -218,7 +217,7 @@ static int simple_card_dai_link_of(struct device_node *node,
 			(daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
 	} else {
 		dai_props->codec_dai.fmt = daifmt;
-		switch (((np == bitclkmaster)<<4)|(np == framemaster)) {
+		switch (((np == bitclkmaster) << 4) | (np == framemaster)) {
 		case 0x11:
 			dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBM_CFM;
 			break;
@@ -235,8 +234,8 @@ static int simple_card_dai_link_of(struct device_node *node,
 	}
 
 	if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) {
-			ret = -EINVAL;
-			goto dai_link_of_err;
+		ret = -EINVAL;
+		goto dai_link_of_err;
 	}
 
 	/* simple-card assumes platform == cpu */
@@ -417,10 +416,10 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 			return -EINVAL;
 		}
 
-		if (!cinfo->name	||
-		    !cinfo->codec_dai.name	||
-		    !cinfo->codec	||
-		    !cinfo->platform	||
+		if (!cinfo->name ||
+		    !cinfo->codec_dai.name ||
+		    !cinfo->codec ||
+		    !cinfo->platform ||
 		    !cinfo->cpu_dai.name) {
 			dev_err(dev, "insufficient asoc_simple_card_info settings\n");
 			return -EINVAL;
@@ -464,11 +463,11 @@ MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
 
 static struct platform_driver asoc_simple_card = {
 	.driver = {
-		.name	= "asoc-simple-card",
+		.name = "asoc-simple-card",
 		.owner = THIS_MODULE,
 		.of_match_table = asoc_simple_of_match,
 	},
-	.probe		= asoc_simple_card_probe,
+	.probe = asoc_simple_card_probe,
 };
 
 module_platform_driver(asoc_simple_card);
-- 
1.8.4

Re: [PATCH 0/3] Fix some minor issues in simple card driver

[Mark Brown]

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On Thu, Apr 24, 2014 at 07:13:57PM +0800, Nicolin Chen wrote:
> The series fixes one name limitation and code style problems.

Applied all, thanks.

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