linux-kernel - [PATCH 4/8] scsi: ufs: qcom: Implement the freq_to_gear

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Message-Id: <20250116091150.1167739-5-quic_ziqichen@quicinc.com>
Date: Thu, 16 Jan 2025 17:11:45 +0800
From: Ziqi Chen <quic_ziqichen@...cinc.com>
To: quic_cang@...cinc.com, bvanassche@....org, mani@...nel.org,
        beanhuo@...ron.com, avri.altman@....com, junwoo80.lee@...sung.com,
        martin.petersen@...cle.com, quic_ziqichen@...cinc.com,
        quic_nguyenb@...cinc.com, quic_nitirawa@...cinc.com,
        quic_rampraka@...cinc.com
Cc: linux-scsi@...r.kernel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
        linux-arm-msm@...r.kernel.org (open list:ARM/QUALCOMM MAILING LIST),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 4/8] scsi: ufs: qcom: Implement the freq_to_gear_speed() vops

From: Can Guo <quic_cang@...cinc.com>

Implement the freq_to_gear_speed() vops to map the unipro core clock
frequency to the corresponding maximum supported gear speed.

Co-developed-by: Ziqi Chen <quic_ziqichen@...cinc.com>
Signed-off-by: Ziqi Chen <quic_ziqichen@...cinc.com>
Signed-off-by: Can Guo <quic_cang@...cinc.com>
---
 drivers/ufs/host/ufs-qcom.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 1e8a23eb8c13..64263fa884f5 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -1803,6 +1803,37 @@ static int ufs_qcom_config_esi(struct ufs_hba *hba)
 	return ret;
 }
 
+static int ufs_qcom_freq_to_gear_speed(struct ufs_hba *hba, unsigned long freq, u32 *gear)
+{
+	int ret = 0;
+
+	switch (freq) {
+	case 403000000:
+		*gear = UFS_HS_G5;
+		break;
+	case 300000000:
+		*gear = UFS_HS_G4;
+		break;
+	case 201500000:
+		*gear = UFS_HS_G3;
+		break;
+	case 150000000:
+	case 100000000:
+		*gear = UFS_HS_G2;
+		break;
+	case 75000000:
+	case 37500000:
+		*gear = UFS_HS_G1;
+		break;
+	default:
+		ret = -EINVAL;
+		dev_err(hba->dev, "Unsupported clock freq\n");
+		break;
+	}
+
+	return ret;
+}
+
 /*
  * struct ufs_hba_qcom_vops - UFS QCOM specific variant operations
  *
@@ -1833,6 +1864,7 @@ static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
 	.op_runtime_config	= ufs_qcom_op_runtime_config,
 	.get_outstanding_cqs	= ufs_qcom_get_outstanding_cqs,
 	.config_esi		= ufs_qcom_config_esi,
+	.freq_to_gear_speed	= ufs_qcom_freq_to_gear_speed,
 };
 
 /**
-- 
2.34.1