So, here is finally the series adding SDR50 support to the Renesas Lager board.
The previous series worked fine with my Transcend card, but failed to switch
voltages on a SanDisk and Samsung card. This bug hunting resulted in patches
5-7 newly added: The clock really has to be disabled on ios->clock == 0,
setting frequency to 0Hz doesn't work. I wonder if this isn't true for some
more controllers?
Changes since RFC are described in the individual patches. I think I addressed
all comments, either by code changes or by replying in the RFC thread why I
chose to decline the suggestion :)
My "copy-large-files-around"-setup showed now 30MB/s while it had 19MB/s
without SDR50. Frankly, I hoped for a little more, but let's start with this
initial support and do the tuning incrementally I'd say.
Patch 1 should go via Geert. Patches 2-8 should go via Ulf. They don't depend
on each other. After those patches went in, Simon can take 9+10 to tie it all
together. I'd say this is 4.7 material.
Please comment, test, apply...
Thanks,
Wolfram
Ben Hutchings (4):
mmc: tmio, sh_mobile_sdhi: Pass tmio_mmc_host ptr to clk_{enable,disable} ops
mmc: tmio, sh_mobile_sdhi: Add support for variable input clock frequency
ARM: shmobile: r8a7790: Set maximum frequencies for SDHI clocks
ARM: shmobile: r8a7790: lager: Enable UHS-I SDR-50
Wolfram Sang (6):
pinctrl: sh-pfc: r8a7790: Implement voltage switching for SDHI
mmc: tmio: Add UHS-I mode support
mmc: tmio: always start clock after frequency calculation
mmc: tmio: stop clock when 0Hz is requested
mmc: host: add note that set_ios needs to handle 0Hz properly
mmc: sh_mobile_sdhi: Add UHS-I mode support
Documentation/devicetree/bindings/mmc/tmio_mmc.txt | 3 +
arch/arm/boot/dts/r8a7790-lager.dts | 22 +++-
arch/arm/boot/dts/r8a7790.dtsi | 4 +
drivers/mmc/host/sh_mobile_sdhi.c | 115 +++++++++++++++++++--
drivers/mmc/host/tmio_mmc.h | 8 +-
drivers/mmc/host/tmio_mmc_pio.c | 110 +++++++++++---------
drivers/pinctrl/sh-pfc/pfc-r8a7790.c | 54 +++++++++-
include/linux/mmc/host.h | 31 ++++--
include/linux/mmc/tmio.h | 2 +
9 files changed, 279 insertions(+), 70 deletions(-)
--
2.7.0
