diff options
Diffstat (limited to 'sound/soc/fsl/fsl_ssi.c')
| -rw-r--r-- | sound/soc/fsl/fsl_ssi.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index 37c5cd4d0e59..95d2392303eb 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -111,12 +111,75 @@ struct fsl_ssi_rxtx_reg_val { struct fsl_ssi_reg_val rx; struct fsl_ssi_reg_val tx; }; + +static const struct reg_default fsl_ssi_reg_defaults[] = { + {0x10, 0x00000000}, + {0x18, 0x00003003}, + {0x1c, 0x00000200}, + {0x20, 0x00000200}, + {0x24, 0x00040000}, + {0x28, 0x00040000}, + {0x38, 0x00000000}, + {0x48, 0x00000000}, + {0x4c, 0x00000000}, + {0x54, 0x00000000}, + {0x58, 0x00000000}, +}; + +static bool fsl_ssi_readable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case CCSR_SSI_SACCEN: + case CCSR_SSI_SACCDIS: + return false; + default: + return true; + } +} + +static bool fsl_ssi_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case CCSR_SSI_STX0: + case CCSR_SSI_STX1: + case CCSR_SSI_SRX0: + case CCSR_SSI_SRX1: + case CCSR_SSI_SISR: + case CCSR_SSI_SFCSR: + case CCSR_SSI_SACADD: + case CCSR_SSI_SACDAT: + case CCSR_SSI_SATAG: + case CCSR_SSI_SACCST: + return true; + default: + return false; + } +} + +static bool fsl_ssi_writeable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case CCSR_SSI_SRX0: + case CCSR_SSI_SRX1: + case CCSR_SSI_SACCST: + return false; + default: + return true; + } +} + static const struct regmap_config fsl_ssi_regconfig = { .max_register = CCSR_SSI_SACCDIS, .reg_bits = 32, .val_bits = 32, .reg_stride = 4, .val_format_endian = REGMAP_ENDIAN_NATIVE, + .reg_defaults = fsl_ssi_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(fsl_ssi_reg_defaults), + .readable_reg = fsl_ssi_readable_reg, + .volatile_reg = fsl_ssi_volatile_reg, + .writeable_reg = fsl_ssi_writeable_reg, + .cache_type = REGCACHE_RBTREE, }; struct fsl_ssi_soc_data { @@ -176,6 +239,9 @@ struct fsl_ssi_private { unsigned int baudclk_streams; unsigned int bitclk_freq; + /*regcache for SFCSR*/ + u32 regcache_sfcsr; + /* DMA params */ struct snd_dmaengine_dai_dma_data dma_params_tx; struct snd_dmaengine_dai_dma_data dma_params_rx; @@ -1514,10 +1580,46 @@ static int fsl_ssi_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int fsl_ssi_suspend(struct device *dev) +{ + struct fsl_ssi_private *ssi_private = dev_get_drvdata(dev); + struct regmap *regs = ssi_private->regs; + + regmap_read(regs, CCSR_SSI_SFCSR, + &ssi_private->regcache_sfcsr); + + regcache_cache_only(regs, true); + regcache_mark_dirty(regs); + + return 0; +} + +static int fsl_ssi_resume(struct device *dev) +{ + struct fsl_ssi_private *ssi_private = dev_get_drvdata(dev); + struct regmap *regs = ssi_private->regs; + + regcache_cache_only(regs, false); + + regmap_update_bits(regs, CCSR_SSI_SFCSR, + CCSR_SSI_SFCSR_RFWM1_MASK | CCSR_SSI_SFCSR_TFWM1_MASK | + CCSR_SSI_SFCSR_RFWM0_MASK | CCSR_SSI_SFCSR_TFWM0_MASK, + ssi_private->regcache_sfcsr); + + return regcache_sync(regs); +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops fsl_ssi_pm = { + SET_SYSTEM_SLEEP_PM_OPS(fsl_ssi_suspend, fsl_ssi_resume) +}; + static struct platform_driver fsl_ssi_driver = { .driver = { .name = "fsl-ssi-dai", .of_match_table = fsl_ssi_ids, + .pm = &fsl_ssi_pm, }, .probe = fsl_ssi_probe, .remove = fsl_ssi_remove, |