I sent a RFC patchset[0] to invent new caps for improving the initialization of mmc core. And Ulf merged MMC_CAP2_NO_SD and improved it for the latest patchset of sh_mmcif[1]. So we could continue to add MMC_CAP2_NO_MMC for a sd or a sdio slot not to send MMC command during initialization if failing to probe the device. Also I'm exposing these new caps to DT for the specific board to improve the initialization. >From the test, we can save nearly 2ms for attaching emmc against the original 8ms. And we gain more than 30us improvement for sd card for each insert. [0]: http://thread.gmane.org/gmane.linux.kernel.mmc/37933 [1]: https://patchwork.kernel.org/patch/9190529/ Shawn Lin (3): mmc: core: Allow hosts to specify non-support for MMC commands mmc: core: expose MMC_CAP2_NO_* to dt Documentation: mmc: add description for new no-sd* and no-mmc Documentation/devicetree/bindings/mmc/mmc.txt | 3 +++ drivers/mmc/core/core.c | 5 +++-- drivers/mmc/core/host.c | 6 ++++++ include/linux/mmc/host.h | 1 + 4 files changed, 13 insertions(+), 2 deletions(-) -- 2.3.7 -- 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
