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[V2,0/2] Re-initialize DLL when MCLK is gated dynamically

Message ID 1539005138-32560-1-git-send-email-vbadigan@codeaurora.org (mailing list archive)
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Series Re-initialize DLL when MCLK is gated dynamically | expand

Message

Veerabhadrarao Badiganti Oct. 8, 2018, 1:25 p.m. UTC 
On few SDHCI-MSM controllers, the host controller's clock tuning
circuit may go out of sync if controller clocks are gated which
eventually, result in data CRC and command CRC/timeout errors.
To fix this issue, the DLL needs to be re-initialized and restored with
its old settings once clocks are ungated.

Changes since V1:
	- Replaced dt flag with a dt compatible string to
	indicate SHDCI-MSM controller varients which need this fix.
	- Moved the DLL settings restoration logic from request 
	context to platform driver runtime pm context.

Tested on: sdm845
Requies patch series:"[PATCH V2 0/3] Internal voltage control for platform drivers"

Veerabhadrarao Badiganti (2):
  dt-bindings: mmc: sdhci-msm: Add new compatible string for sdcdc10 DLL
  mmc: sdhci-msm: Re-initialize DLL if MCLK is gated dynamically

 .../devicetree/bindings/mmc/sdhci-msm.txt          |  4 ++
 drivers/mmc/host/sdhci-msm.c                       | 67 +++++++++++++++++++++-
 2 files changed, 69 insertions(+), 2 deletions(-)