linux-kernel - [PATCH v4 3/4] ufs: host: Add ICE clock scaling during UFS clock changes

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Message-Id: <20260128-enable-ufs-ice-clock-scaling-v4-3-260141e8fce6@oss.qualcomm.com>
Date: Wed, 28 Jan 2026 14:16:42 +0530
From: Abhinaba Rakshit <abhinaba.rakshit@....qualcomm.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Neeraj Soni <neeraj.soni@....qualcomm.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-scsi@...r.kernel.org, linux-crypto@...r.kernel.org,
        devicetree@...r.kernel.org,
        Abhinaba Rakshit <abhinaba.rakshit@....qualcomm.com>
Subject: [PATCH v4 3/4] ufs: host: Add ICE clock scaling during UFS clock
 changes

Implement ICE (Inline Crypto Engine) clock scaling in sync with
UFS controller clock scaling. This ensures that the ICE operates at
an appropriate frequency when the UFS clocks are scaled up or down,
improving performance and maintaining stability for crypto operations.

Signed-off-by: Abhinaba Rakshit <abhinaba.rakshit@....qualcomm.com>
---
 drivers/ufs/host/ufs-qcom.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 8d119b3223cbdaa3297d2beabced0962a1a847d5..00cb9cde760380e7e4213095b9c66657a23b13ee 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -305,6 +305,15 @@ static int ufs_qcom_ice_prepare_key(struct blk_crypto_profile *profile,
 	return qcom_ice_prepare_key(host->ice, lt_key, lt_key_size, eph_key);
 }
 
+static int ufs_qcom_ice_scale_clk(struct ufs_qcom_host *host, unsigned long target_freq,
+				  bool scale_up, unsigned int flags)
+{
+	if (host->hba->caps & UFSHCD_CAP_CRYPTO)
+		return qcom_ice_scale_clk(host->ice, target_freq, scale_up, flags);
+
+	return 0;
+}
+
 static const struct blk_crypto_ll_ops ufs_qcom_crypto_ops = {
 	.keyslot_program	= ufs_qcom_ice_keyslot_program,
 	.keyslot_evict		= ufs_qcom_ice_keyslot_evict,
@@ -339,6 +348,12 @@ static void ufs_qcom_config_ice_allocator(struct ufs_qcom_host *host)
 {
 }
 
+static int ufs_qcom_ice_scale_clk(struct ufs_qcom_host *host, unsigned long target_freq,
+				  bool scale_up, unsigned int flags)
+{
+	return 0;
+}
+
 #endif
 
 static void ufs_qcom_disable_lane_clks(struct ufs_qcom_host *host)
@@ -1646,6 +1661,8 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, bool scale_up,
 		else
 			err = ufs_qcom_clk_scale_down_post_change(hba, target_freq);
 
+		if (!err)
+			err = ufs_qcom_ice_scale_clk(host, target_freq, scale_up, 0);
 
 		if (err) {
 			ufshcd_uic_hibern8_exit(hba);

-- 
2.34.1