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scsi: ufs: ufs-mediatek: Support low-power mode for parents of VCCQx

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Provide the facility to configure parents of VCCQx power rails as low-power
or full-power mode in MediaTek UFS platforms.

Link: https://lore.kernel.org/r/20220616053725.5681-9-stanley.chu@mediatek.com
Signed-off-by: Alice Chao <alice.chao@mediatek.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Stanley Chu 2022-06-16 13:37:22 +08:00 committed by Martin K. Petersen
parent bc602ae977
commit 42b1928360
2 changed files with 37 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

46
drivers/ufs/host/ufs-mediatek.c
View file

@ -1013,10 +1013,30 @@ static int ufs_mtk_link_set_lpm(struct ufs_hba *hba)
return 0;
}
static void ufs_mtk_vreg_set_lpm(struct ufs_hba *hba, bool lpm)
static void ufs_mtk_vccqx_set_lpm(struct ufs_hba *hba, bool lpm)
{
struct ufs_vreg *vccqx = NULL;
if (hba->vreg_info.vccq)
vccqx = hba->vreg_info.vccq;
else
vccqx = hba->vreg_info.vccq2;
regulator_set_mode(vccqx->reg,
lpm ? REGULATOR_MODE_IDLE : REGULATOR_MODE_NORMAL);
}
static void ufs_mtk_vsx_set_lpm(struct ufs_hba *hba, bool lpm)
{
struct arm_smccc_res res;
ufs_mtk_device_pwr_ctrl(!lpm,
(unsigned long)hba->dev_info.wspecversion,
res);
}
static void ufs_mtk_dev_vreg_set_lpm(struct ufs_hba *hba, bool lpm)
{
if (!hba->vreg_info.vccq && !hba->vreg_info.vccq2)
return;
@ -1032,13 +1052,13 @@ static void ufs_mtk_vreg_set_lpm(struct ufs_hba *hba, bool lpm)
if (lpm && hba->vreg_info.vcc->enabled)
return;
if (hba->vreg_info.vccq)
vccqx = hba->vreg_info.vccq;
else
vccqx = hba->vreg_info.vccq2;
regulator_set_mode(vccqx->reg,
lpm ? REGULATOR_MODE_IDLE : REGULATOR_MODE_NORMAL);
if (lpm) {
ufs_mtk_vccqx_set_lpm(hba, lpm);
ufs_mtk_vsx_set_lpm(hba, lpm);
} else {
ufs_mtk_vsx_set_lpm(hba, lpm);
ufs_mtk_vccqx_set_lpm(hba, lpm);
}
}
static void ufs_mtk_auto_hibern8_disable(struct ufs_hba *hba)
@ -1105,7 +1125,7 @@ static int ufs_mtk_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
int err;
if (hba->ufshcd_state != UFSHCD_STATE_OPERATIONAL)
ufs_mtk_vreg_set_lpm(hba, false);
ufs_mtk_dev_vreg_set_lpm(hba, false);
err = ufs_mtk_mphy_power_on(hba, true);
if (err)
@ -1284,7 +1304,7 @@ int ufs_mtk_system_suspend(struct device *dev)
if (ret)
return ret;
ufs_mtk_vreg_set_lpm(hba, true);
ufs_mtk_dev_vreg_set_lpm(hba, true);
return 0;
}
@ -1293,7 +1313,7 @@ int ufs_mtk_system_resume(struct device *dev)
{
struct ufs_hba *hba = dev_get_drvdata(dev);
ufs_mtk_vreg_set_lpm(hba, false);
ufs_mtk_dev_vreg_set_lpm(hba, false);
return ufshcd_system_resume(dev);
}
@ -1307,7 +1327,7 @@ int ufs_mtk_runtime_suspend(struct device *dev)
if (ret)
return ret;
ufs_mtk_vreg_set_lpm(hba, true);
ufs_mtk_dev_vreg_set_lpm(hba, true);
return 0;
}
@ -1316,7 +1336,7 @@ int ufs_mtk_runtime_resume(struct device *dev)
{
struct ufs_hba *hba = dev_get_drvdata(dev);
ufs_mtk_vreg_set_lpm(hba, false);
ufs_mtk_dev_vreg_set_lpm(hba, false);
return ufshcd_runtime_resume(dev);
}

4
drivers/ufs/host/ufs-mediatek.h
View file

@ -83,6 +83,7 @@ enum {
#define UFS_MTK_SIP_DEVICE_RESET BIT(1)
#define UFS_MTK_SIP_CRYPTO_CTRL BIT(2)
#define UFS_MTK_SIP_REF_CLK_NOTIFICATION BIT(3)
#define UFS_MTK_SIP_DEVICE_PWR_CTRL BIT(7)
/*
* VS_DEBUGCLOCKENABLE
@ -182,4 +183,7 @@ static void _ufs_mtk_smc(struct ufs_mtk_smc_arg s)
#define ufs_mtk_device_reset_ctrl(high, res) \
ufs_mtk_smc(UFS_MTK_SIP_DEVICE_RESET, &(res), high)
#define ufs_mtk_device_pwr_ctrl(on, ufs_ver, res) \
ufs_mtk_smc(UFS_MTK_SIP_DEVICE_PWR_CTRL, &(res), on, ufs_ver)
#endif /* !_UFS_MEDIATEK_H */