Hi
I would like to know current status of this patch
> Support for loading the simple-card module via DeviceTree.
> It requests CPU/CODEC information.
>
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto...@renesas.com>
> ---
> v4 -> v5
>
> - fixup spell miss
> - removed un-needed "clock node" example from simple-card.txt
> - add explain that clocks can be used if system has "common clock"
>
> .../devicetree/bindings/sound/simple-card.txt | 66 ++++++++
> sound/soc/generic/simple-card.c | 157
> +++++++++++++++++++-
> 2 files changed, 217 insertions(+), 6 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/sound/simple-card.txt
>
> diff --git a/Documentation/devicetree/bindings/sound/simple-card.txt
> b/Documentation/devicetree/bindings/sound/simple-card.txt
> new file mode 100644
> index 0000000..615a655
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/simple-card.txt
> @@ -0,0 +1,66 @@
> +Simple-Card:
> +
> +Simple-Card specifies audio DAI connection of SoC <-> codec.
> +
> +Required properties:
> +
> +- compatible : "simple-audio"
> +
> +Optional properties:
> +
> +- simple-audio,format : CPU/CODEC common audio format.
> + "i2s", "right_j", "left_j" , "dsp_a"
> + "dsp_b", "ac97", "pdm", "msb", "lsb"
> +Required subnodes:
> +
> +- simple-audio,cpu : CPU sub-node
> +- simple-audio,codec : CODEC sub-node
> +
> +Required CPU/CODEC subnodes properties:
> +
> +- sound-dai : phandle and port of CPU/CODEC
> +
> +Optional CPU/CODEC subnodes properties:
> +
> +- frame-master : bool property. add this if
> subnode is frame master
> +- bitclock-master : bool property. add this if subnode is
> bitclock master
> +- bitclock-inversion : bool property. add this if subnode
> has clock inversion
> +- frame-inversion : bool property. add this if subnode
> has frame inversion
> +- clocks / system-clock-frequency : specify subnode's clock if needed.
> + it can be specified via "clocks" if
> system has
> + clock node (= common clock),
> + or "system-clock-frequency" if system
> can't use it.
> +
> +Example:
> +
> +sound {
> + compatible = "simple-audio";
> + simple-audio,format = "left_j";
> +
> + simple-audio,cpu {
> + sound-dai = <&sh_fsi2 0>;
> + };
> +
> + simple-audio,codec {
> + sound-dai = <&ak4648>;
> + bitclock-master;
> + frame-master;
> + clocks = <&osc>;
> + };
> +};
> +
> +&i2c0 {
> + ak4648: ak4648@12 {
> + #sound-dai-cells = <0>;
> + compatible = "asahi-kasei,ak4648";
> + reg = <0x12>;
> + };
> +};
> +
> +sh_fsi2: sh_fsi2@ec230000 {
> + #sound-dai-cells = <1>;
> + compatible = "renesas,sh_fsi2";
> + reg = <0xec230000 0x400>;
> + interrupt-parent = <&gic>;
> + interrupts = <0 146 0x4>;
> +};
> diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
> index b2fbb70..da1fd7e 100644
> --- a/sound/soc/generic/simple-card.c
> +++ b/sound/soc/generic/simple-card.c
> @@ -8,7 +8,8 @@
> * it under the terms of the GNU General Public License version 2 as
> * published by the Free Software Foundation.
> */
> -
> +#include <linux/clk.h>
> +#include <linux/of.h>
> #include <linux/platform_device.h>
> #include <linux/module.h>
> #include <sound/simple_card.h>
> @@ -57,11 +58,145 @@ static int asoc_simple_card_dai_init(struct
> snd_soc_pcm_runtime *rtd)
> return 0;
> }
>
> +static int
> +asoc_simple_card_sub_parse_of(struct device_node *np,
> + struct asoc_simple_dai *dai,
> + struct device_node **node)
> +{
> + struct clk *clk;
> + int ret;
> +
> + /*
> + * get node via "sound-dai = <&phandle port>"
> + * it will be used as xxx_of_node on soc_bind_dai_link()
> + */
> + *node = of_parse_phandle(np, "sound-dai", 0);
> + if (!*node)
> + return -ENODEV;
> +
> + /* get dai->name */
> + ret = snd_soc_of_get_dai_name(np, &dai->name);
> + if (ret < 0)
> + goto parse_error;
> +
> + /*
> + * bitclock-inversion, frame-inversion
> + * bitclock-master, frame-master
> + * and specific "format" if it has
> + */
> + dai->fmt = snd_soc_of_parse_daifmt(np, NULL);
> +
> + /*
> + * dai->sysclk come from
> + * "clocks = <&xxx>" (if system has common clock)
> + * or "system-clock-frequency = <xxx>"
> + */
> + clk = of_clk_get(np, 0);
> + if (IS_ERR(clk))
> + of_property_read_u32(np,
> + "system-clock-frequency",
> + &dai->sysclk);
> + else
> + dai->sysclk = clk_get_rate(clk);
> +
> + ret = 0;
> +
> +parse_error:
> + of_node_put(*node);
> +
> + return ret;
> +}
> +
> +static int asoc_simple_card_parse_of(struct device_node *node,
> + struct asoc_simple_card_info *info,
> + struct device *dev,
> + struct device_node **of_cpu,
> + struct device_node **of_codec,
> + struct device_node **of_platform)
> +{
> + struct device_node *np;
> + char *name;
> + int ret = 0;
> +
> + /* get CPU/CODEC common format via simple-audio,format */
> + info->daifmt = snd_soc_of_parse_daifmt(node, "simple-audio,") &
> + (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK);
> +
> + /* CPU sub-node */
> + ret = -EINVAL;
> + np = of_get_child_by_name(node, "simple-audio,cpu");
> + if (np)
> + ret = asoc_simple_card_sub_parse_of(np,
> + &info->cpu_dai,
> + of_cpu);
> + if (ret < 0)
> + return ret;
> +
> + /* CODEC sub-node */
> + ret = -EINVAL;
> + np = of_get_child_by_name(node, "simple-audio,codec");
> + if (np)
> + ret = asoc_simple_card_sub_parse_of(np,
> + &info->codec_dai,
> + of_codec);
> + if (ret < 0)
> + return ret;
> +
> + /* card name is created from CPU/CODEC dai name */
> + of_property_read_string(node, "simple-audio,card-name", &info->card);
> + name = devm_kzalloc(dev,
> + strlen(info->cpu_dai.name) +
> + strlen(info->codec_dai.name) + 2,
> + GFP_KERNEL);
> + sprintf(name, "%s-%s", info->cpu_dai.name, info->codec_dai.name);
> + info->name = info->card = name;
> +
> + /* simple-card assumes platform == cpu */
> + *of_platform = *of_cpu;
> +
> + dev_dbg(dev, "card-name : %s\n", info->card);
> + dev_dbg(dev, "platform : %04x\n", info->daifmt);
> + dev_dbg(dev, "cpu : %s / %04x / %d\n",
> + info->cpu_dai.name,
> + info->cpu_dai.fmt,
> + info->cpu_dai.sysclk);
> + dev_dbg(dev, "codec : %s / %04x / %d\n",
> + info->codec_dai.name,
> + info->codec_dai.fmt,
> + info->codec_dai.sysclk);
> +
> + return 0;
> +}
> +
> static int asoc_simple_card_probe(struct platform_device *pdev)
> {
> - struct asoc_simple_card_info *cinfo = pdev->dev.platform_data;
> + struct asoc_simple_card_info *cinfo;
> + struct device_node *np = pdev->dev.of_node;
> + struct device_node *of_cpu, *of_codec, *of_platform;
> struct device *dev = &pdev->dev;
>
> + cinfo = NULL;
> + of_cpu = NULL;
> + of_codec = NULL;
> + of_platform = NULL;
> + if (np && of_device_is_available(np)) {
> + cinfo = devm_kzalloc(dev, sizeof(*cinfo), GFP_KERNEL);
> + if (cinfo) {
> + int ret;
> + ret = asoc_simple_card_parse_of(np, cinfo, dev,
> + &of_cpu,
> + &of_codec,
> + &of_platform);
> + if (ret < 0) {
> + if (ret != -EPROBE_DEFER)
> + dev_err(dev, "parse error %d\n", ret);
> + return ret;
> + }
> + }
> + } else {
> + cinfo = pdev->dev.platform_data;
> + }
> +
> if (!cinfo) {
> dev_err(dev, "no info for asoc-simple-card\n");
> return -EINVAL;
> @@ -69,10 +204,10 @@ static int asoc_simple_card_probe(struct platform_device
> *pdev)
>
> if (!cinfo->name ||
> !cinfo->card ||
> - !cinfo->codec ||
> - !cinfo->platform ||
> - !cinfo->cpu_dai.name ||
> - !cinfo->codec_dai.name) {
> + !cinfo->codec_dai.name ||
> + !(cinfo->codec || of_codec) ||
> + !(cinfo->platform || of_platform) ||
> + !(cinfo->cpu_dai.name || of_cpu)) {
> dev_err(dev, "insufficient asoc_simple_card_info settings\n");
> return -EINVAL;
> }
> @@ -86,6 +221,9 @@ static int asoc_simple_card_probe(struct platform_device
> *pdev)
> cinfo->snd_link.platform_name = cinfo->platform;
> cinfo->snd_link.codec_name = cinfo->codec;
> cinfo->snd_link.codec_dai_name = cinfo->codec_dai.name;
> + cinfo->snd_link.cpu_of_node = of_cpu;
> + cinfo->snd_link.codec_of_node = of_codec;
> + cinfo->snd_link.platform_of_node = of_platform;
> cinfo->snd_link.init = asoc_simple_card_dai_init;
>
> /*
> @@ -107,10 +245,17 @@ static int asoc_simple_card_remove(struct
> platform_device *pdev)
> return snd_soc_unregister_card(&cinfo->snd_card);
> }
>
> +static const struct of_device_id asoc_simple_of_match[] = {
> + { .compatible = "simple-audio", },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
> +
> static struct platform_driver asoc_simple_card = {
> .driver = {
> .name = "asoc-simple-card",
> .owner = THIS_MODULE,
> + .of_match_table = asoc_simple_of_match,
> },
> .probe = asoc_simple_card_probe,
> .remove = asoc_simple_card_remove,
> --
> 1.7.9.5
>
Best regards
---
Kuninori Morimoto
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