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[v2,2/4] scsi: ufs: Update VCCQ2 and VCCQ min/max voltage hard codes

Message ID 0101016e7ca62853-73f33b23-b1d4-4f2e-aec1-e6aa9cd34dfe-000000@us-west-2.amazonses.com (mailing list archive)
State Changes Requested
Headers show
Series UFS driver general fixes bundle 5 | expand

Commit Message

Can Guo Nov. 18, 2019, 3:54 a.m. UTC
Per UFS 3.0 JEDEC standard, the VCCQ2 min voltage is 1.7v and the VCCQ
voltage range is 1.14v ~ 1.26v. Update their hard codes accordingly to
make sure they work in a safe range compliant for ver 1.0/2.0/2.1/3.0
UFS devices.

Signed-off-by: Can Guo <cang@codeaurora.org>
---
 drivers/scsi/ufs/ufs.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Alim Akhtar Nov. 18, 2019, 1:19 p.m. UTC | #1
I agree with Avri, you can just drop this patch, unless you see
anything affected because of not setting VDDQ/VDDQ2 as per spec.
or alternatively you can have  different marco of each spec and handle
the same in the code as per ufs specification version.

On Mon, Nov 18, 2019 at 9:25 AM Can Guo <cang@codeaurora.org> wrote:
>
> Per UFS 3.0 JEDEC standard, the VCCQ2 min voltage is 1.7v and the VCCQ
> voltage range is 1.14v ~ 1.26v. Update their hard codes accordingly to
> make sure they work in a safe range compliant for ver 1.0/2.0/2.1/3.0
> UFS devices.
>
> Signed-off-by: Can Guo <cang@codeaurora.org>
> ---
>  drivers/scsi/ufs/ufs.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h
> index 385bac8..9df4f4d 100644
> --- a/drivers/scsi/ufs/ufs.h
> +++ b/drivers/scsi/ufs/ufs.h
> @@ -500,9 +500,9 @@ struct ufs_query_res {
>  #define UFS_VREG_VCC_MAX_UV       3600000 /* uV */
>  #define UFS_VREG_VCC_1P8_MIN_UV    1700000 /* uV */
>  #define UFS_VREG_VCC_1P8_MAX_UV    1950000 /* uV */
> -#define UFS_VREG_VCCQ_MIN_UV      1100000 /* uV */
> +#define UFS_VREG_VCCQ_MIN_UV      1140000 /* uV */
>  #define UFS_VREG_VCCQ_MAX_UV      1300000 /* uV */
> -#define UFS_VREG_VCCQ2_MIN_UV     1650000 /* uV */
> +#define UFS_VREG_VCCQ2_MIN_UV     1700000 /* uV */
>  #define UFS_VREG_VCCQ2_MAX_UV     1950000 /* uV */
>
>  /*
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
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Patch

diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h
index 385bac8..9df4f4d 100644
--- a/drivers/scsi/ufs/ufs.h
+++ b/drivers/scsi/ufs/ufs.h
@@ -500,9 +500,9 @@  struct ufs_query_res {
 #define UFS_VREG_VCC_MAX_UV	   3600000 /* uV */
 #define UFS_VREG_VCC_1P8_MIN_UV    1700000 /* uV */
 #define UFS_VREG_VCC_1P8_MAX_UV    1950000 /* uV */
-#define UFS_VREG_VCCQ_MIN_UV	   1100000 /* uV */
+#define UFS_VREG_VCCQ_MIN_UV	   1140000 /* uV */
 #define UFS_VREG_VCCQ_MAX_UV	   1300000 /* uV */
-#define UFS_VREG_VCCQ2_MIN_UV	   1650000 /* uV */
+#define UFS_VREG_VCCQ2_MIN_UV	   1700000 /* uV */
 #define UFS_VREG_VCCQ2_MAX_UV	   1950000 /* uV */
 
 /*