From: Can Guo <quic_cang@xxxxxxxxxxx>
Implement the freq_to_gear_speed() vop 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>
Reviewed-by: Bean Huo <beanhuo@xxxxxxxxxx>
Tested-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
---
v1 -> v2:
Print out freq and gear info as debugging message.
v2 -> v3:
1. Change "vops" to "vop" in commit message.
2. Removed variable 'ret' in function ufs_qcom_freq_to_gear_speed().
3. Removed parameters '*gear' and use gear value as return value for
funtion ufs_qcom_freq_to_gear_speed().
v3 -> v4:
Change the data type of 'gear' from 'int' to 'u32'.
---
drivers/ufs/host/ufs-qcom.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index a1eb3cab45e4..3353acaaa2ae 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -1804,6 +1804,36 @@ static int ufs_qcom_config_esi(struct ufs_hba *hba)
return ret;
}
+static u32 ufs_qcom_freq_to_gear_speed(struct ufs_hba *hba, unsigned long freq)
+{
+ u32 gear = 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:
+ dev_err(hba->dev, "%s: Unsupported clock freq : %lu\n", __func__, freq);
+ break;
+ }
+
+ return gear;
+}
+
/*
* struct ufs_hba_qcom_vops - UFS QCOM specific variant operations
*
@@ -1834,6 +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
