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scsi: ufs: ufs-exynos: Add setup_clocks callback

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Add setup_clocks callback to control/gate clocks by ufshcd.  To avoid
calling before initialization, check whether UFS is on or not and call it
initially from pre_link callback.

Link: https://lore.kernel.org/r/20211018124216.153072-7-chanho61.park@samsung.com
Cc: Alim Akhtar <alim.akhtar@samsung.com>
Cc: Kiwoong Kim <kwmad.kim@samsung.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Chanho Park 2021-10-18 21:42:07 +09:00 committed by Martin K. Petersen
parent e1f3e22e93
commit 91c49e7e82
1 changed files with 24 additions and 0 deletions
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24
drivers/scsi/ufs/ufs-exynos.c
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@ -794,6 +794,27 @@ static void exynos_ufs_config_intr(struct exynos_ufs *ufs, u32 errs, u8 index)
}
}
static int exynos_ufs_setup_clocks(struct ufs_hba *hba, bool on,
enum ufs_notify_change_status status)
{
struct exynos_ufs *ufs = ufshcd_get_variant(hba);
if (!ufs)
return 0;
if (on && status == PRE_CHANGE) {
if (ufs->opts & EXYNOS_UFS_OPT_BROKEN_AUTO_CLK_CTRL)
exynos_ufs_disable_auto_ctrl_hcc(ufs);
exynos_ufs_ungate_clks(ufs);
} else if (!on && status == POST_CHANGE) {
exynos_ufs_gate_clks(ufs);
if (ufs->opts & EXYNOS_UFS_OPT_BROKEN_AUTO_CLK_CTRL)
exynos_ufs_enable_auto_ctrl_hcc(ufs);
}
return 0;
}
static int exynos_ufs_pre_link(struct ufs_hba *hba)
{
struct exynos_ufs *ufs = ufshcd_get_variant(hba);
@ -812,6 +833,8 @@ static int exynos_ufs_pre_link(struct ufs_hba *hba)
exynos_ufs_config_phy_time_attr(ufs);
exynos_ufs_config_phy_cap_attr(ufs);
exynos_ufs_setup_clocks(hba, true, PRE_CHANGE);
if (ufs->drv_data->pre_link)
ufs->drv_data->pre_link(ufs);
@ -1202,6 +1225,7 @@ static struct ufs_hba_variant_ops ufs_hba_exynos_ops = {
.hce_enable_notify = exynos_ufs_hce_enable_notify,
.link_startup_notify = exynos_ufs_link_startup_notify,
.pwr_change_notify = exynos_ufs_pwr_change_notify,
.setup_clocks = exynos_ufs_setup_clocks,
.setup_xfer_req = exynos_ufs_specify_nexus_t_xfer_req,
.setup_task_mgmt = exynos_ufs_specify_nexus_t_tm_req,
.hibern8_notify = exynos_ufs_hibern8_notify,