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Diffstat (limited to 'sound/soc/fsl/fsl_esai.c')
-rw-r--r--sound/soc/fsl/fsl_esai.c88
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,
},
};