scsi: ufs: exynos: fsd: Gate ref_clk and put UFS device in reset on suspend

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[ Upstream commit 6d55af0f07 ]

On FSD platform, gating the reference clock (ref_clk) and putting the
UFS device in reset by asserting the reset signal during UFS suspend,
improves the power savings and ensures the PHY is fully turned off.

These operations are added as FSD specific suspend hook to avoid
unintended side effects on other SoCs supported by this driver.

Co-developed-by: Nimesh Sati <nimesh.sati@samsung.com>
Signed-off-by: Nimesh Sati <nimesh.sati@samsung.com>
Signed-off-by: Bharat Uppal <bharat.uppal@samsung.com>
Link: https://lore.kernel.org/r/20250821053923.69411-1-bharat.uppal@samsung.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Bharat Uppal 2025-08-21 11:09:23 +05:30 • committed by Greg Kroah-Hartman

parent 5838b11e66

commit 65d5214829

1 changed files with 8 additions and 0 deletions

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drivers/ufs/host/ufs-exynos.c

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