scsi: ufs-mediatek: introduce reference clock control

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Introduce reference clock control in MediaTek Chipset in order to disable
it if it is not necessary by UFS device to save system power.

Currently reference clock can be disabled during system suspend, runtime
suspend and clock-gating after link enters hibernate state.

Cc: Alim Akhtar <alim.akhtar@samsung.com>
Cc: Avri Altman <avri.altman@wdc.com>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Bean Huo <beanhuo@micron.com>
Cc: Can Guo <cang@codeaurora.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/1577683950-1702-4-git-send-email-stanley.chu@mediatek.com
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Stanley Chu 2019-12-30 13:32:27 +08:00 • committed by Martin K. Petersen

parent b0d077ed38

commit 97347214bc

2 changed files with 78 additions and 6 deletions

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62

drivers/scsi/ufs/ufs-mediatek.c

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22

drivers/scsi/ufs/ufs-mediatek.h

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