[PATCH v7 2/3] ufs: host: Add ICE clock scaling during UFS clock changes

Abhinaba Rakshit
2026-03-02T10:49:46Z

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.

For scale_up operation ensure to pass ~round_ceil (round_floor)
and vice-versa for scale_down operations.

Incase of OPP scaling is not supported by ICE, ensure to not prevent
devfreq for UFS, as ICE OPP-table is optional.

Acked-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Abhinaba Rakshit <abhinaba.rakshit@oss.qualcomm.com>
---
drivers/ufs/host/ufs-qcom.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 8d119b3223cbdaa3297d2beabced0962a1a847d5..776444f46fe5f00f947e4b0b4dfe6d64e2ad2150 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 round_ceil)
+{
+ if (host->hba->caps & UFSHCD_CAP_CRYPTO)
+ return qcom_ice_scale_clk(host->ice, target_freq, round_ceil);
+
+ 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 round_ceil)
+{
+ return 0;
+}
+
#endif

static void ufs_qcom_disable_lane_clks(struct ufs_qcom_host *host)
@@ -1646,8 +1661,10 @@ 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);

- if (err) {
+ if (err && err != -EOPNOTSUPP) {
ufshcd_uic_hibern8_exit(hba);
return err;
}

--
2.34.1