Commit 0836cc25 authored by Peter Wang's avatar Peter Wang Committed by Martin K. Petersen
Browse files

scsi: ufs: ufs-mediatek: Support low-power mode for VCCQ 

Allow VCCQ to enter low-power mode, and also remove the restriction of VCC
because VCCQ/VCCQ2 can be changed to low-power mode even if VCC stays on
while the device is not in active power mode.

Link: https://lore.kernel.org/r/20220616053725.5681-7-stanley.chu@mediatek.com


Reviewed-by: default avatarStanley Chu <stanley.chu@mediatek.com>
Signed-off-by: default avatarPeter Wang <peter.wang@mediatek.com>
Signed-off-by: default avatarStanley Chu <stanley.chu@mediatek.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 005ffdf0

drivers/ufs/host/ufs-mediatek.c

+13 −6
Original line number Diff line number Diff line
@@ -1031,7 +1031,13 @@ static int ufs_mtk_link_set_lpm(struct ufs_hba *hba) 


static void ufs_mtk_vreg_set_lpm(struct ufs_hba *hba, bool lpm)

{

	if (!hba->vreg_info.vccq2 || !hba->vreg_info.vcc)

	struct ufs_vreg *vccqx = NULL;



	if (!hba->vreg_info.vccq && !hba->vreg_info.vccq2)

		return;



	/* Skip if VCC is assumed always-on */

	if (!hba->vreg_info.vcc)

		return;



	/* Bypass LPM when device is still active */
@@ -1042,12 +1048,13 @@ static void ufs_mtk_vreg_set_lpm(struct ufs_hba *hba, bool lpm) 
	if (lpm && hba->vreg_info.vcc->enabled)

		return;



	if (lpm)

		regulator_set_mode(hba->vreg_info.vccq2->reg,

				   REGULATOR_MODE_IDLE);

	if (hba->vreg_info.vccq)

		vccqx = hba->vreg_info.vccq;

	else

		regulator_set_mode(hba->vreg_info.vccq2->reg,

				   REGULATOR_MODE_NORMAL);

		vccqx = hba->vreg_info.vccq2;



	regulator_set_mode(vccqx->reg,

			   lpm ? REGULATOR_MODE_IDLE : REGULATOR_MODE_NORMAL);

}



static void ufs_mtk_auto_hibern8_disable(struct ufs_hba *hba)