From 7c3c20f2bec1e8bdaadd551a4b75f1834a7cb974 Mon Sep 17 00:00:00 2001 From: Katsuhiro Suzuki Date: Fri, 16 Mar 2018 16:08:13 +0900 Subject: [PATCH] ASoC: uniphier: add syscon property for UniPhier sound system This patch adds syscon property for specifying soc-glue core. Currently, soc-glue core is used for changing the state of S/PDIF signal output pin to signal output state or Hi-Z state. After resetting of SoC Hi-Z state is selected. This driver set to signal output state when syscon property is available. Signed-off-by: Katsuhiro Suzuki Signed-off-by: Mark Brown --- sound/soc/uniphier/aio-core.c | 21 +++++++++++++++++++++ sound/soc/uniphier/aio-cpu.c | 11 +++++++++++ sound/soc/uniphier/aio-reg.h | 3 +++ sound/soc/uniphier/aio.h | 2 ++ 4 files changed, 37 insertions(+) diff --git a/sound/soc/uniphier/aio-core.c b/sound/soc/uniphier/aio-core.c index 1711361fc0c2..6d50042a4571 100644 --- a/sound/soc/uniphier/aio-core.c +++ b/sound/soc/uniphier/aio-core.c @@ -83,6 +83,27 @@ u64 aio_rb_space_to_end(struct uniphier_aio_sub *sub) return rb_space_to_end(sub->wr_offs, sub->rd_offs, sub->compr_bytes); } +/** + * aio_iecout_set_enable - setup IEC output via SoC glue + * @chip: the AIO chip pointer + * @enable: false to stop the output, true to start + * + * Set enabled or disabled S/PDIF signal output to out of SoC via AOnIEC pins. + * This function need to call at driver startup. + * + * The regmap of SoC glue is specified by 'socionext,syscon' optional property + * of DT. This function has no effect if no property. + */ +void aio_iecout_set_enable(struct uniphier_aio_chip *chip, bool enable) +{ + struct regmap *r = chip->regmap_sg; + + if (!r) + return; + + regmap_write(r, SG_AOUTEN, (enable) ? ~0 : 0); +} + /** * aio_chip_set_pll - set frequency to audio PLL * @chip : the AIO chip pointer diff --git a/sound/soc/uniphier/aio-cpu.c b/sound/soc/uniphier/aio-cpu.c index 7cf2316c69a2..1e5eb8e6f8c7 100644 --- a/sound/soc/uniphier/aio-cpu.c +++ b/sound/soc/uniphier/aio-cpu.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -387,6 +388,7 @@ int uniphier_aio_dai_probe(struct snd_soc_dai *dai) sub->spec = spec; } + aio_iecout_set_enable(aio->chip, true); aio_chip_init(aio->chip); aio->chip->active = 1; @@ -431,6 +433,7 @@ int uniphier_aio_dai_resume(struct snd_soc_dai *dai) if (ret) goto err_out_clock; + aio_iecout_set_enable(aio->chip, true); aio_chip_init(aio->chip); for (i = 0; i < ARRAY_SIZE(aio->sub); i++) { @@ -477,6 +480,14 @@ int uniphier_aio_probe(struct platform_device *pdev) if (!chip->chip_spec) return -EINVAL; + chip->regmap_sg = syscon_regmap_lookup_by_phandle(dev->of_node, + "socionext,syscon"); + if (IS_ERR(chip->regmap_sg)) { + if (PTR_ERR(chip->regmap_sg) == -EPROBE_DEFER) + return -EPROBE_DEFER; + chip->regmap_sg = NULL; + } + chip->clk = devm_clk_get(dev, "aio"); if (IS_ERR(chip->clk)) return PTR_ERR(chip->clk); diff --git a/sound/soc/uniphier/aio-reg.h b/sound/soc/uniphier/aio-reg.h index eaf2c65acf14..136d3563cf44 100644 --- a/sound/soc/uniphier/aio-reg.h +++ b/sound/soc/uniphier/aio-reg.h @@ -23,6 +23,9 @@ #include +/* soc-glue */ +#define SG_AOUTEN 0x1c04 + /* SW view */ #define A2CHNMAPCTR0(n) (0x00000 + 0x40 * (n)) #define A2RBNMAPCTR0(n) (0x01000 + 0x40 * (n)) diff --git a/sound/soc/uniphier/aio.h b/sound/soc/uniphier/aio.h index 793334675cb3..8cab4a553a97 100644 --- a/sound/soc/uniphier/aio.h +++ b/sound/soc/uniphier/aio.h @@ -296,6 +296,7 @@ struct uniphier_aio_chip { struct clk *clk; struct reset_control *rst; struct regmap *regmap; + struct regmap *regmap_sg; int active; }; @@ -323,6 +324,7 @@ u64 aio_rbt_cnt_to_end(struct uniphier_aio_sub *sub); u64 aio_rb_space(struct uniphier_aio_sub *sub); u64 aio_rb_space_to_end(struct uniphier_aio_sub *sub); +void aio_iecout_set_enable(struct uniphier_aio_chip *chip, bool enable); int aio_chip_set_pll(struct uniphier_aio_chip *chip, int pll_id, unsigned int freq); void aio_chip_init(struct uniphier_aio_chip *chip);