diff options
Diffstat (limited to 'sound/soc/fsl/fsl_spdif.c')
| -rw-r--r-- | sound/soc/fsl/fsl_spdif.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c index ab729f2426fe..3d59bb6719f2 100644 --- a/sound/soc/fsl/fsl_spdif.c +++ b/sound/soc/fsl/fsl_spdif.c @@ -108,6 +108,8 @@ struct fsl_spdif_priv { struct clk *sysclk; struct snd_dmaengine_dai_dma_data dma_params_tx; struct snd_dmaengine_dai_dma_data dma_params_rx; + /* regcache for SRPC */ + u32 regcache_srpc; }; /* DPLL locked and lock loss interrupt handler */ @@ -300,6 +302,8 @@ static int spdif_softreset(struct fsl_spdif_priv *spdif_priv) struct regmap *regmap = spdif_priv->regmap; u32 val, cycle = 1000; + regcache_cache_bypass(regmap, true); + regmap_write(regmap, REG_SPDIF_SCR, SCR_SOFT_RESET); /* @@ -310,6 +314,10 @@ static int spdif_softreset(struct fsl_spdif_priv *spdif_priv) regmap_read(regmap, REG_SPDIF_SCR, &val); } while ((val & SCR_SOFT_RESET) && cycle--); + regcache_cache_bypass(regmap, false); + regcache_mark_dirty(regmap); + regcache_sync(regmap); + if (cycle) return 0; else @@ -997,6 +1005,14 @@ static const struct snd_soc_component_driver fsl_spdif_component = { }; /* FSL SPDIF REGMAP */ +static const struct reg_default fsl_spdif_reg_defaults[] = { + {0x0, 0x00000400}, + {0x4, 0x00000000}, + {0xc, 0x00000000}, + {0x34, 0x00000000}, + {0x38, 0x00000000}, + {0x50, 0x00020f00}, +}; static bool fsl_spdif_readable_reg(struct device *dev, unsigned int reg) { @@ -1022,6 +1038,26 @@ static bool fsl_spdif_readable_reg(struct device *dev, unsigned int reg) } } +static bool fsl_spdif_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case REG_SPDIF_SRPC: + case REG_SPDIF_SIS: + case REG_SPDIF_SRL: + case REG_SPDIF_SRR: + case REG_SPDIF_SRCSH: + case REG_SPDIF_SRCSL: + case REG_SPDIF_SRU: + case REG_SPDIF_SRQ: + case REG_SPDIF_STL: + case REG_SPDIF_STR: + case REG_SPDIF_SRFM: + return true; + default: + return false; + } +} + static bool fsl_spdif_writeable_reg(struct device *dev, unsigned int reg) { switch (reg) { @@ -1047,8 +1083,12 @@ static const struct regmap_config fsl_spdif_regmap_config = { .val_bits = 32, .max_register = REG_SPDIF_STC, + .reg_defaults = fsl_spdif_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(fsl_spdif_reg_defaults), .readable_reg = fsl_spdif_readable_reg, + .volatile_reg = fsl_spdif_volatile_reg, .writeable_reg = fsl_spdif_writeable_reg, + .cache_type = REGCACHE_RBTREE, }; static u32 fsl_spdif_txclk_caldiv(struct fsl_spdif_priv *spdif_priv, @@ -1271,6 +1311,38 @@ static int fsl_spdif_probe(struct platform_device *pdev) return ret; } +#ifdef CONFIG_PM_SLEEP +static int fsl_spdif_suspend(struct device *dev) +{ + struct fsl_spdif_priv *spdif_priv = dev_get_drvdata(dev); + + regmap_read(spdif_priv->regmap, REG_SPDIF_SRPC, + &spdif_priv->regcache_srpc); + + regcache_cache_only(spdif_priv->regmap, true); + regcache_mark_dirty(spdif_priv->regmap); + + return 0; +} + +static int fsl_spdif_resume(struct device *dev) +{ + struct fsl_spdif_priv *spdif_priv = dev_get_drvdata(dev); + + regcache_cache_only(spdif_priv->regmap, false); + + regmap_update_bits(spdif_priv->regmap, REG_SPDIF_SRPC, + SRPC_CLKSRC_SEL_MASK | SRPC_GAINSEL_MASK, + spdif_priv->regcache_srpc); + + return regcache_sync(spdif_priv->regmap); +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops fsl_spdif_pm = { + SET_SYSTEM_SLEEP_PM_OPS(fsl_spdif_suspend, fsl_spdif_resume) +}; + static const struct of_device_id fsl_spdif_dt_ids[] = { { .compatible = "fsl,imx35-spdif", }, { .compatible = "fsl,vf610-spdif", }, @@ -1282,6 +1354,7 @@ static struct platform_driver fsl_spdif_driver = { .driver = { .name = "fsl-spdif-dai", .of_match_table = fsl_spdif_dt_ids, + .pm = &fsl_spdif_pm, }, .probe = fsl_spdif_probe, }; |