The patchset features several bugfixes, rework and upgrade for the meson-gx MMC driver. The main goal is to improve readability and enable new high speed modes, such as eMMC DDR52 and sdcard UHS modes up to SDR50 (100Mhz) SDR104 is not working with a few cards on the p200 and the libretech-cc. I suspect that 200Mhz might be a bit too fast for the PCB of these boards, adding noise to the signal and eventually breaking the communication with some cards. The same cards are working well on a laptop or the nanopi-k2 at 200Mhz. This series has been tested on gxbb-p200, gxbb-nanopi-k2 and gxl-s905x-libretech-cc Changes since v2 [1]: * Drop patches 1 to 3: Applied. * Drop patch 4: Debug stuff which should not have been sent. * Added fix to previous patch 3: If the clock register is not initialized before registering the clk with CCF, the framework will complain about an illegal divider value. This had gone unnoticed because it was later fixed by the clock init rework. Ulf, I know it is getting late but it would be nice if patch #1 of this v3 could go with 3 patches you already applied. The rest can wait for the following cycle. Changes since v1 [0]: * Reorder patches to have fixes first, then rework and finally enhancements. * Use CCF to manage clock phases [0]: https://lkml.kernel.org/r/20170804174353.16486-1-jbrunet@xxxxxxxxxxxx [1]: https://lkml.kernel.org/r/20170821160301.21899-1-jbrunet@xxxxxxxxxxxx Jerome Brunet (13): mmc: meson-gx: initialize sane clk default before clock register mmc: meson-gx: cfg init overwrite values mmc: meson-gx: rework set_ios function mmc: meson-gx: rework clk_set function mmc: meson-gx: rework clock init function mmc: meson-gx: fix dual data rate mode frequencies mmc: meson-gx: work around clk-stop issue mmc: meson-gx: simplify interrupt handler mmc: meson-gx: implement card_busy callback mmc: meson-gx: use CCF to handle the clock phases mmc: meson-gx: implement voltage switch callback mmc: meson-gx: change default tx phase mmc: meson-gx: rework tuning function drivers/mmc/host/meson-gx-mmc.c | 710 ++++++++++++++++++++++++++++------------ 1 file changed, 493 insertions(+), 217 deletions(-) -- 2.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
