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SubjectRe: [PATCH V5 0/2] Re-initialize DLL when MCLK is gated dynamically
On 12 November 2018 at 07:52, Veerabhadrarao Badiganti
<vbadigan@codeaurora.org> wrote:
> 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. SDHC cotroller on SDM845 SOC
> has this limitation.
>
> Changes since V4:
> - Exactly same as V3, posted multiple mails for V4.
> So to avoid confusion updating it as V5.
>
> Changes since V3:
> - Introduced SoC specific dt compatible string for sdhci-msm
> controller
> - Moved the condition which checks whether tuning is needed or
> not, to a common function.
>
> Changes since V2:
> - Removed an unused variable.
> - Renamed the newly introduced flags to be more meaningful.
> - Added new dt compatible string for SDM845 SOC.
>
> 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
> Veerabhadrarao Badiganti (2):
> dt-bindings: mmc: sdhci-msm: Add SoC-specific compatible strings
> mmc: sdhci-msm: Re-initialize DLL if MCLK is gated dynamically
>
> .../devicetree/bindings/mmc/sdhci-msm.txt | 21 ++++--
> drivers/mmc/host/sdhci-msm.c | 78 +++++++++++++++++++---
> 2 files changed, 84 insertions(+), 15 deletions(-)

Applied for next, thanks!

Kind regards
Uffe

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