[PATCH v2 4/8] scsi: ufs: qcom: Implement the freq_to_gear_speed() vops

[Ziqi Chen]

From: Can Guo <quic_cang@xxxxxxxxxxx>

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

Signed-off-by: Can Guo <quic_cang@xxxxxxxxxxx>
Co-developed-by: Ziqi Chen <quic_ziqichen@xxxxxxxxxxx>
Signed-off-by: Ziqi Chen <quic_ziqichen@xxxxxxxxxxx>
---

v1 -> v2:
Print out freq and gear info as debugging message.
---
 drivers/ufs/host/ufs-qcom.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index a1eb3cab45e4..77cc1b8019a9 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -1804,6 +1804,40 @@ 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, "%s: Unsupported clock freq : %lu\n", __func__, freq);
+		break;
+	}
+
+	if (!ret)
+		dev_dbg(hba->dev, "%s: Freq %lu to Gear %u\n", __func__, freq, *gear);
+
+	return ret;
+}
+
 /*
  * struct ufs_hba_qcom_vops - UFS QCOM specific variant operations
  *
@@ -1834,6 +1868,7 @@ 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