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mmc: Clock Scaling changes on 4.19 kernel
Besides below listed patches, resolved merge conflicts and updated scaling in CQE path to support upstream CQE/MQ solution. This is squash of following mmc clock scaling patches: ----------------------------------------------------- CMQ specific changes: -------------------- 9591b99 : fix invalid state handling during cm 339a4e1 : Add clock scaling for CMDQ mode ToDo: 01deb37 : serialize the requests if we are scaled down~ Generic scaling chagnes: ----------------------- From 4.14 kernel: a95906d : Remove suspend/resume clk-scaling logic from mmc_rese d139f5e3 :Update target-frequency while resuming clock scalin From 4.9 kernel f4ac989 : Use new flag for suspending clk scaling 6720af387a: Correct the checks while setting clock scaling frequencies 2f3f4ebb4 : Use PF_MEMALLOC flag for clock scaling context e2f8af3d91: Handle error case in mmc_suspend 7f5e93a4db: Disable clock scaling during shutdown 450552a6c : Avoid returning error when clok scaling devfreq is removed b263703672: Use mmc_reset instead of power_restore 4ef47bcd0 : Fix the issue with clock scaling in resume-scaling 48887f382 : initialize the devfreq table with default frequencies f3218eb38 : fix the pointer cast of freq_table edac91ad8b: fix issue with clock scaling in HS200 mode c364cee0b8: modify scaling up/down sequence a0723f267 : Add NULL check for host->card d18963a : fix deadlock between runtime-suspend and ce8b61e2 : Set max frequency when disabling clock scaling 1a9cf8b : fix issue with devfreq clock scalin 9379bf9 : resolve deadlock between devfreq update and susp 0fcc35f : support DDR52 bus-speed during eMMC clock scaling 164db7b21 : mmc: core: fix downdifferential for clock scaling ee975d3 : check if manual BKOPS is ongoing before scaling 999102c32 : add support for devfreq suspend/resume 8f00420 : clock-scaling: scale only for data re 3904067 : add runtime PM voting to devfreq context 5cd5d9f : avoid returning error value for clk-scaling c96b666 : disable clock scaling before sys 87605ad : change locking from irq_save to bh df07bec : Fix clock scaling for HS400 with enhanced stro 54f9de1 : Fix in mmc clk-s a52f84e : fix MMC clock scaling to meet upstream HS4 7dc5f79 : devfreq: migrate to devfreq based clock f125b55 : fix SD card runtime suspend sequence for cloc 6297e40 : fix disable clock scalin a12e92b : core: Fix clock frequency transitions during inval 4e3a8b4 : Exit clock scaling prior to removing 3449b4f : add clock-scaling support to HS400 cards 86787cd : core: Add support for notifying host driver while scaling a3f56e1 : Bypass clock scaling while accessing RPMB partition 8ca7092 : run clock scaling only in valid card state cb18d8585d: Add load based clock scaling support a0230ca50 : Fix MMC clock scaling in case of tuning failure 7095b8e8c : Allow changing bus frequency for SD/eMMC cards in runtime Sysfs changes for clock scaling feature (from 4.9): ------------------------------------------------- 8920fc713 : Update the logic of controlling clk scaling through sysfs 64753b808 : claim mmc host while enabling clock scaling from userspace 00d52acb3 : Add sysfs entries for dynamic control of clock scaling 16d0832 : Add a debugfs entry to set max clock rat mmc: sd: Add support for Ultra High Speed card to get max frequency This change adds Ultra High Speed cards to mmc_sd_get_max_clock() API. Cards that support Ultra High Speed can set timing of SDR104 which supports frequency up to 208Mhz. mmc: core: Add active request in mmc driver to be used in scaling Number of active request are needed to decide when to stop scaling. Add active reqs variable in host structure to keep the active request count and use in scaling. mmc: core: Use freq table with devfreq Register the min/max frequencies with devfreq and use these to determine if we're trying to step up or down. mmc: sd: Add deferred scaling change bus speed In deferred scaling, no need to claim host as host is already claimed using get card. Change-Id: Iaf42fdbb738e0d8a05c28be5a61db1540dde0ca5 Signed-off-by:Sujit Reddy Thumma <sthumma@codeaurora.org> Signed-off-by: