Merge series "ASoC: cs42l42: Fixes to power-down" from Richard Fitzgerald <rf@opensource.cirrus.com>:

Driver probe and remove were inconsistent in what they did to power-down
and neither did all steps. In addition to that, neither function
prevented the interrupt handler from running during and after power-down.

Richard Fitzgerald (2):
  ASoC: cs42l42: Reset and power-down on remove() and failed probe()
  ASoC: cs42l42: free_irq() before powering-down on probe() fail

 sound/soc/codecs/cs42l42.c | 43 +++++++++++++++++++++++++++++++------------
 1 file changed, 31 insertions(+), 12 deletions(-)

--
2.11.0

1 files changed, 31 insertions, 12 deletions

diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c
index a8fff274ec63..1029f6b3eb48 100644
--- a/sound/soc/codecs/cs42l42.c
+++ b/sound/soc/codecs/cs42l42.c
@@ -2067,7 +2067,7 @@ static int cs42l42_i2c_probe(struct i2c_client *i2c_client,
 		"reset", GPIOD_OUT_LOW);
 	if (IS_ERR(cs42l42->reset_gpio)) {
 		ret = PTR_ERR(cs42l42->reset_gpio);
-		goto err_disable;
+		goto err_disable_noreset;
 	}
 
 	if (cs42l42->reset_gpio) {
@@ -2078,17 +2078,16 @@ static int cs42l42_i2c_probe(struct i2c_client *i2c_client,
 
 	/* Request IRQ if one was specified */
 	if (i2c_client->irq) {
-		ret = devm_request_threaded_irq(&i2c_client->dev,
-						i2c_client->irq,
-						NULL, cs42l42_irq_thread,
-						IRQF_ONESHOT | IRQF_TRIGGER_LOW,
-						"cs42l42", cs42l42);
+		ret = request_threaded_irq(i2c_client->irq,
+					   NULL, cs42l42_irq_thread,
+					   IRQF_ONESHOT | IRQF_TRIGGER_LOW,
+					   "cs42l42", cs42l42);
 		if (ret == -EPROBE_DEFER) {
-			goto err_disable;
+			goto err_disable_noirq;
 		} else if (ret != 0) {
 			dev_err(&i2c_client->dev,
 				"Failed to request IRQ: %d\n", ret);
-			goto err_disable;
+			goto err_disable_noirq;
 		}
 	}
 
@@ -2111,7 +2110,7 @@ static int cs42l42_i2c_probe(struct i2c_client *i2c_client,
 	ret = regmap_read(cs42l42->regmap, CS42L42_REVID, &reg);
 	if (ret < 0) {
 		dev_err(&i2c_client->dev, "Get Revision ID failed\n");
-		goto err_disable;
+		goto err_shutdown;
 	}
 
 	dev_info(&i2c_client->dev,
@@ -2136,7 +2135,7 @@ static int cs42l42_i2c_probe(struct i2c_client *i2c_client,
 
 	ret = cs42l42_handle_device_data(&i2c_client->dev, cs42l42);
 	if (ret != 0)
-		goto err_disable;
+		goto err_shutdown;
 
 	/* Setup headset detection */
 	cs42l42_setup_hs_type_detect(cs42l42);
@@ -2148,10 +2147,22 @@ static int cs42l42_i2c_probe(struct i2c_client *i2c_client,
 	ret = devm_snd_soc_register_component(&i2c_client->dev,
 			&soc_component_dev_cs42l42, &cs42l42_dai, 1);
 	if (ret < 0)
-		goto err_disable;
+		goto err_shutdown;
+
 	return 0;
 
+err_shutdown:
+	regmap_write(cs42l42->regmap, CS42L42_CODEC_INT_MASK, 0xff);
+	regmap_write(cs42l42->regmap, CS42L42_TSRS_PLUG_INT_MASK, 0xff);
+	regmap_write(cs42l42->regmap, CS42L42_PWR_CTL1, 0xff);
+
 err_disable:
+	if (i2c_client->irq)
+		free_irq(i2c_client->irq, cs42l42);
+
+err_disable_noirq:
+	gpiod_set_value_cansleep(cs42l42->reset_gpio, 0);
+err_disable_noreset:
 	regulator_bulk_disable(ARRAY_SIZE(cs42l42->supplies),
 				cs42l42->supplies);
 	return ret;
@@ -2162,7 +2173,15 @@ static int cs42l42_i2c_remove(struct i2c_client *i2c_client)
 	struct cs42l42_private *cs42l42 = i2c_get_clientdata(i2c_client);
 
 	if (i2c_client->irq)
-		devm_free_irq(&i2c_client->dev, i2c_client->irq, cs42l42);
+		free_irq(i2c_client->irq, cs42l42);
+
+	/*
+	 * The driver might not have control of reset and power supplies,
+	 * so ensure that the chip internals are powered down.
+	 */
+	regmap_write(cs42l42->regmap, CS42L42_CODEC_INT_MASK, 0xff);
+	regmap_write(cs42l42->regmap, CS42L42_TSRS_PLUG_INT_MASK, 0xff);
+	regmap_write(cs42l42->regmap, CS42L42_PWR_CTL1, 0xff);
 
 	gpiod_set_value_cansleep(cs42l42->reset_gpio, 0);
 	regulator_bulk_disable(ARRAY_SIZE(cs42l42->supplies), cs42l42->supplies);