On 12 November 2018 at 07:52, Veerabhadrarao Badiganti <vbadigan@xxxxxxxxxxxxxx> 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
