[PATCH v2 03/10] mfd: cs42l43: Use new SoundWire enumeration helper

[Charles Keepax <ckeepax@opensource.cirrus.com>]

Now the new wait for SoundWire enumeration helper no longer depends on
unattach_request it is safe to use from probe time. Update the driver
to use the new core helper.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---

Changes since v1:
 - Completely remove attached variable since it was now unused.

 drivers/mfd/cs42l43-i2c.c   |  2 --
 drivers/mfd/cs42l43-sdw.c   |  7 -------
 drivers/mfd/cs42l43.c       | 15 ++++++---------
 include/linux/mfd/cs42l43.h |  2 --
 4 files changed, 6 insertions(+), 20 deletions(-)

diff --git a/drivers/mfd/cs42l43-i2c.c b/drivers/mfd/cs42l43-i2c.c
index 0a0ab5e549a5a..4db452b41220d 100644
--- a/drivers/mfd/cs42l43-i2c.c
+++ b/drivers/mfd/cs42l43-i2c.c
@@ -45,8 +45,6 @@ static int cs42l43_i2c_probe(struct i2c_client *i2c)
 
 	cs42l43->dev = &i2c->dev;
 	cs42l43->irq = i2c->irq;
-	/* A device on an I2C is always attached by definition. */
-	cs42l43->attached = true;
 	cs42l43->variant_id = (long)device_get_match_data(cs42l43->dev);
 
 	cs42l43->regmap = devm_regmap_init_i2c(i2c, &cs42l43_i2c_regmap);
diff --git a/drivers/mfd/cs42l43-sdw.c b/drivers/mfd/cs42l43-sdw.c
index 794c983781750..2b87ae2d79c51 100644
--- a/drivers/mfd/cs42l43-sdw.c
+++ b/drivers/mfd/cs42l43-sdw.c
@@ -100,17 +100,10 @@ static int cs42l43_sdw_update_status(struct sdw_slave *sdw, enum sdw_slave_statu
 
 		sdw_write_no_pm(sdw, CS42L43_GEN_INT_MASK_1,
 				CS42L43_INT_STAT_GEN1_MASK);
-
-		cs42l43->attached = true;
-
-		complete(&cs42l43->device_attach);
 		break;
 	case SDW_SLAVE_UNATTACHED:
 		dev_dbg(cs42l43->dev, "Device detach\n");
 
-		cs42l43->attached = false;
-
-		reinit_completion(&cs42l43->device_attach);
 		complete(&cs42l43->device_detach);
 		break;
 	default:
diff --git a/drivers/mfd/cs42l43.c b/drivers/mfd/cs42l43.c
index 166881751e698..cb1e175586bd1 100644
--- a/drivers/mfd/cs42l43.c
+++ b/drivers/mfd/cs42l43.c
@@ -586,15 +586,13 @@ static int cs42l43_soft_reset(struct cs42l43 *cs42l43)
  */
 static int cs42l43_wait_for_attach(struct cs42l43 *cs42l43)
 {
-	if (!cs42l43->attached) {
-		unsigned long timeout = msecs_to_jiffies(CS42L43_SDW_ATTACH_TIMEOUT_MS);
-		unsigned long time;
+	int ret;
 
-		time = wait_for_completion_timeout(&cs42l43->device_attach, timeout);
-		if (!time) {
-			dev_err(cs42l43->dev, "Timed out waiting for device re-attach\n");
-			return -ETIMEDOUT;
-		}
+	if (cs42l43->sdw) {
+		ret = sdw_slave_wait_for_init(cs42l43->sdw,
+					      CS42L43_SDW_ATTACH_TIMEOUT_MS);
+		if (ret)
+			return ret;
 	}
 
 	regcache_cache_only(cs42l43->regmap, false);
@@ -1120,7 +1118,6 @@ int cs42l43_dev_probe(struct cs42l43 *cs42l43)
 	dev_set_drvdata(cs42l43->dev, cs42l43);
 
 	mutex_init(&cs42l43->pll_lock);
-	init_completion(&cs42l43->device_attach);
 	init_completion(&cs42l43->device_detach);
 	init_completion(&cs42l43->firmware_download);
 	INIT_WORK(&cs42l43->boot_work, cs42l43_boot_work);
diff --git a/include/linux/mfd/cs42l43.h b/include/linux/mfd/cs42l43.h
index ff0f7e365a19f..8e993fb535e68 100644
--- a/include/linux/mfd/cs42l43.h
+++ b/include/linux/mfd/cs42l43.h
@@ -86,7 +86,6 @@ struct cs42l43 {
 	struct regmap_irq_chip_data *irq_data;
 
 	struct work_struct boot_work;
-	struct completion device_attach;
 	struct completion device_detach;
 	struct completion firmware_download;
 	int firmware_error;
@@ -96,7 +95,6 @@ struct cs42l43 {
 	struct mutex pll_lock;
 
 	bool sdw_pll_active;
-	bool attached;
 	bool hw_lock;
 	long variant_id;
 };
-- 
2.47.3