linux-kernel - [PATCH 1/6] scsi: ufs: exynos: ensure pre_link() executes before exynos_ufs_phy

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Message-ID: <20250226220414.343659-2-peter.griffin@linaro.org>
Date: Wed, 26 Feb 2025 22:04:09 +0000
From: Peter Griffin <peter.griffin@...aro.org>
To: alim.akhtar@...sung.com,
	James.Bottomley@...senPartnership.com,
	martin.petersen@...cle.com,
	krzk@...nel.org
Cc: linux-scsi@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	willmcvicker@...gle.com,
	tudor.ambarus@...aro.org,
	andre.draszik@...aro.org,
	ebiggers@...nel.org,
	bvanassche@....org,
	kernel-team@...roid.com,
	Peter Griffin <peter.griffin@...aro.org>
Subject: [PATCH 1/6] scsi: ufs: exynos: ensure pre_link() executes before exynos_ufs_phy_init()

Ensure clocks are enabled before configuring unipro. Additionally move the
pre_link() hook before the exynos_ufs_phy_init() calls. This means the
register write sequence  more closely resembles the ordering of the
downstream driver.

Signed-off-by: Peter Griffin <peter.griffin@...aro.org>
---
 drivers/ufs/host/ufs-exynos.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c
index 13dd5dfc03eb..cd750786187c 100644
--- a/drivers/ufs/host/ufs-exynos.c
+++ b/drivers/ufs/host/ufs-exynos.c
@@ -1049,9 +1049,14 @@ static int exynos_ufs_pre_link(struct ufs_hba *hba)
 	exynos_ufs_config_intr(ufs, DFES_DEF_L4_ERRS, UNIPRO_L4);
 	exynos_ufs_set_unipro_pclk_div(ufs);
 
+	exynos_ufs_setup_clocks(hba, true, PRE_CHANGE);
+
 	/* unipro */
 	exynos_ufs_config_unipro(ufs);
 
+	if (ufs->drv_data->pre_link)
+		ufs->drv_data->pre_link(ufs);
+
 	/* m-phy */
 	exynos_ufs_phy_init(ufs);
 	if (!(ufs->opts & EXYNOS_UFS_OPT_SKIP_CONFIG_PHY_ATTR)) {
@@ -1059,11 +1064,6 @@ static int exynos_ufs_pre_link(struct ufs_hba *hba)
 		exynos_ufs_config_phy_cap_attr(ufs);
 	}
 
-	exynos_ufs_setup_clocks(hba, true, PRE_CHANGE);
-
-	if (ufs->drv_data->pre_link)
-		ufs->drv_data->pre_link(ufs);
-
 	return 0;
 }
 
-- 
2.48.1.658.g4767266eb4-goog