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author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2013-11-20 15:25:02 +0900 |
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committer | Mark Brown <broonie@linaro.org> | 2013-12-02 12:37:28 +0000 |
commit | fa558c2801fc173758c742d836f3cc4621851557 (patch) | |
tree | f47b3e5e8c6027790027bfff0e561eb63b3e64c3 /sound/soc/generic | |
parent | af91706d5ddecb4a9858cca9e90d463037cfd498 (diff) | |
download | linux-stable-fa558c2801fc173758c742d836f3cc4621851557.tar.gz linux-stable-fa558c2801fc173758c742d836f3cc4621851557.tar.bz2 linux-stable-fa558c2801fc173758c742d836f3cc4621851557.zip |
ASoC: simple-card: add Device Tree support
Support for loading the simple-card module via DeviceTree.
It requests CPU/CODEC information.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'sound/soc/generic')
-rw-r--r-- | sound/soc/generic/simple-card.c | 156 |
1 files changed, 150 insertions, 6 deletions
diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c index b2fbb7075a6c..7a9b6b4898c0 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 +58,144 @@ 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-card,format */ + info->daifmt = snd_soc_of_parse_daifmt(node, "simple-audio-card,") & + (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK); + + /* CPU sub-node */ + ret = -EINVAL; + np = of_get_child_by_name(node, "simple-audio-card,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-card,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 */ + 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 +203,10 @@ 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 +220,9 @@ 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 +244,17 @@ 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-card", }, + {}, +}; +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, |