diff options
Diffstat (limited to 'sound/soc/fsl/fsl_esai.c')
| -rw-r--r-- | sound/soc/fsl/fsl_esai.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c index 837979ea5..59f234e51 100644 --- a/sound/soc/fsl/fsl_esai.c +++ b/sound/soc/fsl/fsl_esai.c @@ -652,6 +652,24 @@ static const struct snd_soc_component_driver fsl_esai_component = { .name = "fsl-esai", }; +static const struct reg_default fsl_esai_reg_defaults[] = { + {0x8, 0x00000000}, + {0x10, 0x00000000}, + {0x18, 0x00000000}, + {0x98, 0x00000000}, + {0xd0, 0x00000000}, + {0xd4, 0x00000000}, + {0xd8, 0x00000000}, + {0xdc, 0x00000000}, + {0xe0, 0x00000000}, + {0xe4, 0x0000ffff}, + {0xe8, 0x0000ffff}, + {0xec, 0x0000ffff}, + {0xf0, 0x0000ffff}, + {0xf8, 0x00000000}, + {0xfc, 0x00000000}, +}; + static bool fsl_esai_readable_reg(struct device *dev, unsigned int reg) { switch (reg) { @@ -684,6 +702,31 @@ static bool fsl_esai_readable_reg(struct device *dev, unsigned int reg) } } +static bool fsl_esai_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case REG_ESAI_ETDR: + case REG_ESAI_ERDR: + case REG_ESAI_ESR: + case REG_ESAI_TFSR: + case REG_ESAI_RFSR: + case REG_ESAI_TX0: + case REG_ESAI_TX1: + case REG_ESAI_TX2: + case REG_ESAI_TX3: + case REG_ESAI_TX4: + case REG_ESAI_TX5: + case REG_ESAI_RX0: + case REG_ESAI_RX1: + case REG_ESAI_RX2: + case REG_ESAI_RX3: + case REG_ESAI_SAISR: + return true; + default: + return false; + } +} + static bool fsl_esai_writeable_reg(struct device *dev, unsigned int reg) { switch (reg) { @@ -721,8 +764,12 @@ static const struct regmap_config fsl_esai_regmap_config = { .val_bits = 32, .max_register = REG_ESAI_PCRC, + .reg_defaults = fsl_esai_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(fsl_esai_reg_defaults), .readable_reg = fsl_esai_readable_reg, + .volatile_reg = fsl_esai_volatile_reg, .writeable_reg = fsl_esai_writeable_reg, + .cache_type = REGCACHE_RBTREE, }; static int fsl_esai_probe(struct platform_device *pdev) @@ -853,10 +900,51 @@ static const struct of_device_id fsl_esai_dt_ids[] = { }; MODULE_DEVICE_TABLE(of, fsl_esai_dt_ids); +#ifdef CONFIG_PM_SLEEP +static int fsl_esai_suspend(struct device *dev) +{ + struct fsl_esai *esai = dev_get_drvdata(dev); + + regcache_cache_only(esai->regmap, true); + regcache_mark_dirty(esai->regmap); + + return 0; +} + +static int fsl_esai_resume(struct device *dev) +{ + struct fsl_esai *esai = dev_get_drvdata(dev); + int ret; + + regcache_cache_only(esai->regmap, false); + + /* FIFO reset for safety */ + regmap_update_bits(esai->regmap, REG_ESAI_TFCR, + ESAI_xFCR_xFR, ESAI_xFCR_xFR); + regmap_update_bits(esai->regmap, REG_ESAI_RFCR, + ESAI_xFCR_xFR, ESAI_xFCR_xFR); + + ret = regcache_sync(esai->regmap); + if (ret) + return ret; + + /* FIFO reset done */ + regmap_update_bits(esai->regmap, REG_ESAI_TFCR, ESAI_xFCR_xFR, 0); + regmap_update_bits(esai->regmap, REG_ESAI_RFCR, ESAI_xFCR_xFR, 0); + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops fsl_esai_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(fsl_esai_suspend, fsl_esai_resume) +}; + static struct platform_driver fsl_esai_driver = { .probe = fsl_esai_probe, .driver = { .name = "fsl-esai-dai", + .pm = &fsl_esai_pm_ops, .of_match_table = fsl_esai_dt_ids, }, }; |