Commit e55f24ff authored by Anil Varughese's avatar Anil Varughese Committed by Martin K. Petersen

scsi: ufs: Disable local LCC in .link_startup_notify() in Cadence UFS

Some UFS devices have issues if LCC is enabled. So we are setting
PA_LOCAL_TX_LCC_Enable to 0 before link startup which will make sure that
both host and device TX LCC are disabled once link startup is completed.
Signed-off-by: default avatarAnil Varughese <aniljoy@cadence.com>
Reviewed-by: default avatarVignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 5f6b4e1e
......@@ -77,6 +77,31 @@ static int cdns_ufs_hce_enable_notify(struct ufs_hba *hba,
return cdns_ufs_set_hclkdiv(hba);
}
/**
* Called before and after Link startup is carried out.
* @hba: host controller instance
* @status: notify stage (pre, post change)
*
* Return zero for success and non-zero for failure
*/
static int cdns_ufs_link_startup_notify(struct ufs_hba *hba,
enum ufs_notify_change_status status)
{
if (status != PRE_CHANGE)
return 0;
/*
* Some UFS devices have issues if LCC is enabled.
* So we are setting PA_Local_TX_LCC_Enable to 0
* before link startup which will make sure that both host
* and device TX LCC are disabled once link startup is
* completed.
*/
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE), 0);
return 0;
}
/**
* cdns_ufs_init - performs additional ufs initialization
* @hba: host controller instance
......@@ -114,12 +139,14 @@ static int cdns_ufs_m31_16nm_phy_initialization(struct ufs_hba *hba)
static const struct ufs_hba_variant_ops cdns_ufs_pltfm_hba_vops = {
.name = "cdns-ufs-pltfm",
.hce_enable_notify = cdns_ufs_hce_enable_notify,
.link_startup_notify = cdns_ufs_link_startup_notify,
};
static const struct ufs_hba_variant_ops cdns_ufs_m31_16nm_pltfm_hba_vops = {
.name = "cdns-ufs-pltfm",
.init = cdns_ufs_init,
.hce_enable_notify = cdns_ufs_hce_enable_notify,
.link_startup_notify = cdns_ufs_link_startup_notify,
.phy_initialization = cdns_ufs_m31_16nm_phy_initialization,
};
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment