[PATCH 2/2] mfd: cs42l43: Move to core detach helper

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

Now the core has a helper to signal a device will detach from
the SoundWire bus, there is no need for the cs42l43 driver code
to separately track that. Switch to using the new core helper.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
 drivers/mfd/cs42l43-sdw.c   |  2 --
 drivers/mfd/cs42l43.c       | 15 +--------------
 include/linux/mfd/cs42l43.h |  1 -
 3 files changed, 1 insertion(+), 17 deletions(-)

diff --git a/drivers/mfd/cs42l43-sdw.c b/drivers/mfd/cs42l43-sdw.c
index 0a6999453f325..f0825d6bf7b38 100644
--- a/drivers/mfd/cs42l43-sdw.c
+++ b/drivers/mfd/cs42l43-sdw.c
@@ -102,8 +102,6 @@ static int cs42l43_sdw_update_status(struct sdw_slave *sdw, enum sdw_slave_statu
 		break;
 	case SDW_SLAVE_UNATTACHED:
 		dev_dbg(cs42l43->dev, "Device detach\n");
-
-		complete(&cs42l43->device_detach);
 		break;
 	default:
 		break;
diff --git a/drivers/mfd/cs42l43.c b/drivers/mfd/cs42l43.c
index 4212ebcca60b5..f08ee598366d9 100644
--- a/drivers/mfd/cs42l43.c
+++ b/drivers/mfd/cs42l43.c
@@ -30,7 +30,6 @@
 #define CS42L43_RESET_DELAY_MS			20
 
 #define CS42L43_SDW_ATTACH_TIMEOUT_MS		5000
-#define CS42L43_SDW_DETACH_TIMEOUT_MS		100
 
 #define CS42L43_MCU_BOOT_STAGE1			1
 #define CS42L43_MCU_BOOT_STAGE2			2
@@ -555,7 +554,7 @@ static int cs42l43_soft_reset(struct cs42l43 *cs42l43)
 		{ CS42L43_SFT_RESET, CS42L43_SFT_RESET_VAL },
 	};
 
-	reinit_completion(&cs42l43->device_detach);
+	sdw_slave_signal_unattach(cs42l43->sdw);
 
 	/*
 	 * Apply cache only because the soft reset will cause the device to
@@ -566,17 +565,6 @@ static int cs42l43_soft_reset(struct cs42l43 *cs42l43)
 
 	msleep(CS42L43_RESET_DELAY_MS);
 
-	if (cs42l43->sdw) {
-		unsigned long timeout = msecs_to_jiffies(CS42L43_SDW_DETACH_TIMEOUT_MS);
-		unsigned long time;
-
-		time = wait_for_completion_timeout(&cs42l43->device_detach, timeout);
-		if (!time) {
-			dev_err(cs42l43->dev, "Timed out waiting for device detach\n");
-			return -ETIMEDOUT;
-		}
-	}
-
 	return -EAGAIN;
 }
 
@@ -1115,7 +1103,6 @@ int cs42l43_dev_probe(struct cs42l43 *cs42l43)
 	dev_set_drvdata(cs42l43->dev, cs42l43);
 
 	mutex_init(&cs42l43->pll_lock);
-	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 8e993fb535e68..798dc55149662 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_detach;
 	struct completion firmware_download;
 	int firmware_error;
 
-- 
2.47.3