[PATCH] ufs: rockchip: Make use of controller resets

[Alexey Charkov]

Assert Rockchip UFS controller resets during initialization and HCE
enable, as it is done by the Linux driver.

This is required to make some UFS chips, such as Foresee FEUDNN064G-C2G0,
work properly.

Note that the resets were already requested in the probe function, just
not used.

Signed-off-by: Alexey Charkov <alchark at flipper.net>
---
 drivers/ufs/ufs-rockchip.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/ufs/ufs-rockchip.c b/drivers/ufs/ufs-rockchip.c
index a13236c7f761..dc4b9b5c86da 100644
--- a/drivers/ufs/ufs-rockchip.c
+++ b/drivers/ufs/ufs-rockchip.c
@@ -19,13 +19,22 @@
 #include "unipro.h"
 #include "ufs-rockchip.h"
 
+static void ufs_rockchip_controller_reset(struct ufs_rockchip_host *host)
+{
+	reset_assert_bulk(&host->rsts);
+	udelay(1);
+	reset_deassert_bulk(&host->rsts);
+}
+
 static int ufs_rockchip_hce_enable_notify(struct ufs_hba *hba,
 					  enum ufs_notify_change_status status)
 {
 	int err = 0;
 
-	if (status != POST_CHANGE)
+	if (status != POST_CHANGE) {
+		ufs_rockchip_controller_reset(dev_get_priv(hba->dev));
 		return 0;
+	}
 
 	ufshcd_dme_reset(hba);
 	ufshcd_dme_enable(hba);
@@ -150,6 +159,8 @@ static int ufs_rockchip_common_init(struct ufs_hba *hba)
 		return err;
 	}
 
+	ufs_rockchip_controller_reset(host);
+
 	err = gpio_request_by_name(dev, "reset-gpios", 0, &host->device_reset,
 				   GPIOD_IS_OUT | GPIOD_ACTIVE_LOW);
 	if (err) {

---
base-commit: 841856ed9675b26ec517fdd00b5cc0aef8db508e
change-id: 20260316-rockchip-ufs-reset-345cf81efa31

Best regards,
-- 
Alexey Charkov <alchark at flipper.net>