[PATCH 1/1] Revert "usb: chipidea: move ci_ulpi_init after the phy initialization"

[Peter Chen <peter.chen@kernel.org>]

This reverts commit 22ffd399e6e7aa18ae0314278ed0b7f05f8ab679.
People report this commit causes the driver defer probed, and never
back to work[1][2].

[1] https://lore.kernel.org/lkml/20240407011913.GA168730@nchen-desktop/T/#mc2b93bc11a8b01ec7cd0d0bf6b0b03951d9ef751
[2] https://lore.kernel.org/lkml/20240407011913.GA168730@nchen-desktop/T/#me87d9a2a76c07619d83b3879ea14780da89fbbbf

Cc: Michael Grzeschik <m.grzeschik@pengutronix.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Wouter Franken <wouter@franken-peeters.be>
Signed-off-by: Peter Chen <peter.chen@kernel.org>
---
 drivers/usb/chipidea/core.c | 8 ++++----
 drivers/usb/chipidea/ulpi.c | 5 +++++
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index bada13f704b6..835bf2428dc6 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -1084,6 +1084,10 @@ static int ci_hdrc_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
+	ret = ci_ulpi_init(ci);
+	if (ret)
+		return ret;
+
 	if (ci->platdata->phy) {
 		ci->phy = ci->platdata->phy;
 	} else if (ci->platdata->usb_phy) {
@@ -1138,10 +1142,6 @@ static int ci_hdrc_probe(struct platform_device *pdev)
 		goto ulpi_exit;
 	}
 
-	ret = ci_ulpi_init(ci);
-	if (ret)
-		return ret;
-
 	ci->hw_bank.phys = res->start;
 
 	ci->irq = platform_get_irq(pdev, 0);
diff --git a/drivers/usb/chipidea/ulpi.c b/drivers/usb/chipidea/ulpi.c
index 89fb51e2c3de..dfec07e8ae1d 100644
--- a/drivers/usb/chipidea/ulpi.c
+++ b/drivers/usb/chipidea/ulpi.c
@@ -68,6 +68,11 @@ int ci_ulpi_init(struct ci_hdrc *ci)
 	if (ci->platdata->phy_mode != USBPHY_INTERFACE_MODE_ULPI)
 		return 0;
 
+	/*
+	 * Set PORTSC correctly so we can read/write ULPI registers for
+	 * identification purposes
+	 */
+	hw_phymode_configure(ci);
 
 	ci->ulpi_ops.read = ci_ulpi_read;
 	ci->ulpi_ops.write = ci_ulpi_write;
-- 
2.25.1