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| author | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2022-12-22 19:40:00 +0530 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-01-11 21:49:35 -0500 |
| commit | 2c407fe97015a063855fa518bd790f024f818277 (patch) | |
| tree | c78068317c3504f91985ef4089a677ab7ecf4b5d /drivers/ufs | |
| parent | baf5ddac90dc1983bc376b7ca6fe1afde702ff29 (diff) | |
| download | lwn-2c407fe97015a063855fa518bd790f024f818277.tar.gz lwn-2c407fe97015a063855fa518bd790f024f818277.zip | |
scsi: ufs: ufs-qcom: Add support for finding max gear on new platforms
Starting from Qcom UFS version 4.0, vendor specific REG_UFS_PARAM0 register
can be used to determine the maximum gear supported by the controller.
Suggested-by: Can Guo <quic_cang@quicinc.com>
Reviewed-by: Andrew Halaney <ahalaney@redhat.com>
Tested-by: Andrew Halaney <ahalaney@redhat.com> # Qdrive3/sa8540p-ride
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/ufs')
| -rw-r--r-- | drivers/ufs/host/ufs-qcom.c | 2 | ||||
| -rw-r--r-- | drivers/ufs/host/ufs-qcom.h | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 3370fa4364f0..5e7ba3b6a59d 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -282,6 +282,8 @@ static u32 ufs_qcom_get_hs_gear(struct ufs_hba *hba) * Hence downgrade the maximum supported gear to HS-G2. */ return UFS_HS_G2; + } else if (host->hw_ver.major >= 0x4) { + return UFS_QCOM_MAX_GEAR(ufshcd_readl(hba, REG_UFS_PARAM0)); } /* Default is HS-G3 */ diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h index 6cb970530060..f744a9e62002 100644 --- a/drivers/ufs/host/ufs-qcom.h +++ b/drivers/ufs/host/ufs-qcom.h @@ -94,6 +94,10 @@ enum { #define TMRLUT_HW_CGC_EN BIT(6) #define OCSC_HW_CGC_EN BIT(7) +/* bit definitions for REG_UFS_PARAM0 */ +#define MAX_HS_GEAR_MASK GENMASK(6, 4) +#define UFS_QCOM_MAX_GEAR(x) FIELD_GET(MAX_HS_GEAR_MASK, (x)) + /* bit definition for UFS_UFS_TEST_BUS_CTRL_n */ #define TEST_BUS_SUB_SEL_MASK GENMASK(4, 0) /* All XXX_SEL fields are 5 bits wide */ |