diff options
Diffstat (limited to 'sound/soc/codecs/cs35l56-shared.c')
| -rw-r--r-- | sound/soc/codecs/cs35l56-shared.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/sound/soc/codecs/cs35l56-shared.c b/sound/soc/codecs/cs35l56-shared.c index 0cd572de73a9..35789ffc63af 100644 --- a/sound/soc/codecs/cs35l56-shared.c +++ b/sound/soc/codecs/cs35l56-shared.c @@ -195,6 +195,47 @@ static bool cs35l56_volatile_reg(struct device *dev, unsigned int reg) } } +/* + * The firmware boot sequence can overwrite the ASP1 config registers so that + * they don't match regmap's view of their values. Rewrite the values from the + * regmap cache into the hardware registers. + */ +int cs35l56_force_sync_asp1_registers_from_cache(struct cs35l56_base *cs35l56_base) +{ + struct reg_sequence asp1_regs[] = { + { .reg = CS35L56_ASP1_ENABLES1 }, + { .reg = CS35L56_ASP1_CONTROL1 }, + { .reg = CS35L56_ASP1_CONTROL2 }, + { .reg = CS35L56_ASP1_CONTROL3 }, + { .reg = CS35L56_ASP1_FRAME_CONTROL1 }, + { .reg = CS35L56_ASP1_FRAME_CONTROL5 }, + { .reg = CS35L56_ASP1_DATA_CONTROL1 }, + { .reg = CS35L56_ASP1_DATA_CONTROL5 }, + }; + int i, ret; + + /* Read values from regmap cache into a write sequence */ + for (i = 0; i < ARRAY_SIZE(asp1_regs); ++i) { + ret = regmap_read(cs35l56_base->regmap, asp1_regs[i].reg, &asp1_regs[i].def); + if (ret) + goto err; + } + + /* Write the values cache-bypassed so that they will be written to silicon */ + ret = regmap_multi_reg_write_bypassed(cs35l56_base->regmap, asp1_regs, + ARRAY_SIZE(asp1_regs)); + if (ret) + goto err; + + return 0; + +err: + dev_err(cs35l56_base->dev, "Failed to sync ASP1 registers: %d\n", ret); + + return ret; +} +EXPORT_SYMBOL_NS_GPL(cs35l56_force_sync_asp1_registers_from_cache, SND_SOC_CS35L56_SHARED); + int cs35l56_mbox_send(struct cs35l56_base *cs35l56_base, unsigned int command) { unsigned int val; |