Add an IRQ handler which logs detected faults (but doesn't do anything else).
Signed-off-by: Martin Povišer povik+lin@cutebit.org --- sound/soc/codecs/tas2764.c | 93 ++++++++++++++++++++++++++++++++++++++ sound/soc/codecs/tas2764.h | 19 ++++++++ 2 files changed, 112 insertions(+)
diff --git a/sound/soc/codecs/tas2764.c b/sound/soc/codecs/tas2764.c index 39902f77a2e0..e99a46fb503f 100644 --- a/sound/soc/codecs/tas2764.c +++ b/sound/soc/codecs/tas2764.c @@ -31,6 +31,7 @@ struct tas2764_priv { struct gpio_desc *sdz_gpio; struct regmap *regmap; struct device *dev; + int irq; int v_sense_slot; int i_sense_slot; @@ -39,6 +40,57 @@ struct tas2764_priv { bool unmuted; };
+static const char *tas2764_int_ltch0_msgs[8] = { + "fault: over temperature", /* INT_LTCH0 & BIT(0) */ + "fault: over current", + "fault: bad TDM clock", + "limiter active", + "fault: PVDD below limiter inflection point", + "fault: limiter max attenuation", + "fault: BOP infinite hold", + "fault: BOP mute", /* INT_LTCH0 & BIT(7) */ +}; + +static const unsigned int tas2764_int_readout_regs[6] = { + TAS2764_INT_LTCH0, + TAS2764_INT_LTCH1, + TAS2764_INT_LTCH1_0, + TAS2764_INT_LTCH2, + TAS2764_INT_LTCH3, + TAS2764_INT_LTCH4, +}; + +static irqreturn_t tas2764_irq(int irq, void *data) +{ + struct tas2764_priv *tas2764 = data; + u8 latched[6] = {0, 0, 0, 0, 0, 0}; + int ret = IRQ_NONE; + int i; + + for (i = 0; i < ARRAY_SIZE(latched); i++) + latched[i] = snd_soc_component_read(tas2764->component, + tas2764_int_readout_regs[i]); + + for (i = 0; i < 8; i++) { + if (latched[0] & BIT(i)) { + dev_crit_ratelimited(tas2764->dev, "%s\n", + tas2764_int_ltch0_msgs[i]); + ret = IRQ_HANDLED; + } + } + + if (latched[0]) { + dev_err_ratelimited(tas2764->dev, "other context to the fault: %02x,%02x,%02x,%02x,%02x", + latched[1], latched[2], latched[3], latched[4], latched[5]); + snd_soc_component_update_bits(tas2764->component, + TAS2764_INT_CLK_CFG, + TAS2764_INT_CLK_CFG_IRQZ_CLR, + TAS2764_INT_CLK_CFG_IRQZ_CLR); + } + + return ret; +} + static void tas2764_reset(struct tas2764_priv *tas2764) { if (tas2764->reset_gpio) { @@ -497,6 +549,34 @@ static int tas2764_codec_probe(struct snd_soc_component *component)
tas2764_reset(tas2764);
+ if (tas2764->irq) { + ret = snd_soc_component_write(tas2764->component, TAS2764_INT_MASK0, 0xff); + if (ret < 0) + return ret; + + ret = snd_soc_component_write(tas2764->component, TAS2764_INT_MASK1, 0xff); + if (ret < 0) + return ret; + + ret = snd_soc_component_write(tas2764->component, TAS2764_INT_MASK2, 0xff); + if (ret < 0) + return ret; + + ret = snd_soc_component_write(tas2764->component, TAS2764_INT_MASK3, 0xff); + if (ret < 0) + return ret; + + ret = snd_soc_component_write(tas2764->component, TAS2764_INT_MASK4, 0xff); + if (ret < 0) + return ret; + + ret = devm_request_threaded_irq(tas2764->dev, tas2764->irq, NULL, tas2764_irq, + IRQF_ONESHOT | IRQF_SHARED | IRQF_TRIGGER_LOW, + "tas2764", tas2764); + if (ret) + dev_warn(tas2764->dev, "failed to request IRQ: %d\n", ret); + } + ret = snd_soc_component_update_bits(tas2764->component, TAS2764_TDM_CFG5, TAS2764_TDM_CFG5_VSNS_ENABLE, 0); if (ret < 0) @@ -559,9 +639,21 @@ static const struct regmap_range_cfg tas2764_regmap_ranges[] = { }, };
+static bool tas2764_volatile_register(struct device *dev, unsigned int reg) +{ + switch (reg) { + case TAS2764_INT_LTCH0 ... TAS2764_INT_LTCH4: + case TAS2764_INT_CLK_CFG: + return true; + default: + return false; + } +} + static const struct regmap_config tas2764_i2c_regmap = { .reg_bits = 8, .val_bits = 8, + .volatile_reg = tas2764_volatile_register, .reg_defaults = tas2764_reg_defaults, .num_reg_defaults = ARRAY_SIZE(tas2764_reg_defaults), .cache_type = REGCACHE_RBTREE, @@ -615,6 +707,7 @@ static int tas2764_i2c_probe(struct i2c_client *client) return -ENOMEM;
tas2764->dev = &client->dev; + tas2764->irq = client->irq; i2c_set_clientdata(client, tas2764); dev_set_drvdata(&client->dev, tas2764);
diff --git a/sound/soc/codecs/tas2764.h b/sound/soc/codecs/tas2764.h index f015f22a083b..960b337ed0fc 100644 --- a/sound/soc/codecs/tas2764.h +++ b/sound/soc/codecs/tas2764.h @@ -87,4 +87,23 @@ #define TAS2764_TDM_CFG6_ISNS_ENABLE BIT(6) #define TAS2764_TDM_CFG6_50_MASK GENMASK(5, 0)
+/* Interrupt Masks */ +#define TAS2764_INT_MASK0 TAS2764_REG(0x0, 0x3b) +#define TAS2764_INT_MASK1 TAS2764_REG(0x0, 0x3c) +#define TAS2764_INT_MASK2 TAS2764_REG(0x0, 0x40) +#define TAS2764_INT_MASK3 TAS2764_REG(0x0, 0x41) +#define TAS2764_INT_MASK4 TAS2764_REG(0x0, 0x3d) + +/* Latched Fault Registers */ +#define TAS2764_INT_LTCH0 TAS2764_REG(0x0, 0x49) +#define TAS2764_INT_LTCH1 TAS2764_REG(0x0, 0x4a) +#define TAS2764_INT_LTCH1_0 TAS2764_REG(0x0, 0x4b) +#define TAS2764_INT_LTCH2 TAS2764_REG(0x0, 0x4f) +#define TAS2764_INT_LTCH3 TAS2764_REG(0x0, 0x50) +#define TAS2764_INT_LTCH4 TAS2764_REG(0x0, 0x51) + +/* Clock/IRQ Settings */ +#define TAS2764_INT_CLK_CFG TAS2764_REG(0x0, 0x5c) +#define TAS2764_INT_CLK_CFG_IRQZ_CLR BIT(2) + #endif /* __TAS2764__ */