diff options
| author | Po-Wen Kao | 2022-06-23 11:50:50 +0800 |
|---|---|---|
| committer | Martin K. Petersen | 2022-06-27 23:17:36 -0400 |
| commit | 2cf5cb2bb13140ecc0f01ebc8844ee8b5203293f (patch) | |
| tree | 80882cf324f7b0017f3f76b52a801819797b7231 /drivers/ufs/host | |
| parent | 4918694ccd6974f3ec8eeda3f34ace0ce480153e (diff) | |
scsi: ufs: ufs-mediatek: Support host power control
Add interfaces for controlling the host power to optimize the power
consumption in MediaTek UFS platforms.
Link: https://lore.kernel.org/r/20220623035052.18802-7-stanley.chu@mediatek.com
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Po-Wen Kao <powen.kao@mediatek.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/ufs/host')
| -rw-r--r-- | drivers/ufs/host/ufs-mediatek.c | 5 | ||||
| -rw-r--r-- | drivers/ufs/host/ufs-mediatek.h | 12 |
2 files changed, 17 insertions, 0 deletions
diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c index a7482f530f27..7254629484ab 100644 --- a/drivers/ufs/host/ufs-mediatek.c +++ b/drivers/ufs/host/ufs-mediatek.c @@ -1190,6 +1190,8 @@ static int ufs_mtk_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op, if (ufshcd_is_link_off(hba)) ufs_mtk_device_reset_ctrl(0, res); + ufs_mtk_host_pwr_ctrl(HOST_PWR_HCI, false, res); + return 0; fail: /* @@ -1204,10 +1206,13 @@ fail: static int ufs_mtk_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) { int err; + struct arm_smccc_res res; if (hba->ufshcd_state != UFSHCD_STATE_OPERATIONAL) ufs_mtk_dev_vreg_set_lpm(hba, false); + ufs_mtk_host_pwr_ctrl(HOST_PWR_HCI, true, res); + err = ufs_mtk_mphy_power_on(hba, true); if (err) goto fail; diff --git a/drivers/ufs/host/ufs-mediatek.h b/drivers/ufs/host/ufs-mediatek.h index c12ceb4d941f..cdf40851e626 100644 --- a/drivers/ufs/host/ufs-mediatek.h +++ b/drivers/ufs/host/ufs-mediatek.h @@ -84,6 +84,7 @@ 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_HOST_PWR_CTRL BIT(5) #define UFS_MTK_SIP_GET_VCC_NUM BIT(6) #define UFS_MTK_SIP_DEVICE_PWR_CTRL BIT(7) @@ -157,6 +158,14 @@ enum ufs_mtk_vcc_num { }; /* + * Host Power Control options + */ +enum { + HOST_PWR_HCI = 0, + HOST_PWR_MPHY +}; + +/* * SMC call wrapper function */ struct ufs_mtk_smc_arg { @@ -195,6 +204,9 @@ 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_host_pwr_ctrl(opt, on, res) \ + ufs_mtk_smc(UFS_MTK_SIP_HOST_PWR_CTRL, &(res), opt, on) + #define ufs_mtk_get_vcc_num(res) \ ufs_mtk_smc(UFS_MTK_SIP_GET_VCC_NUM, &(res)) |