So, here is v2 of the series adding SDR50 support to the Renesas Lager board.
Change since v1:
* rebased to renesas-drivers based on v4.6-rc1
* dropped pinctrl patch which was already picked up
* directly populate start_signal_voltage_switch() in mmc_ops
instead of using a wrapper function
* use generic DT pinctrl bindings instead of vendor specific ones
(e.g. "groups" instead of "renesas,groups")
The RFC series worked fine with my Transcend card, but failed to switch
voltages on a SanDisk and Samsung card. This bug hunting resulted in patches
4-6 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? Is this known already?
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.
Patches 1-7 should go via Ulf. After those patches went in, Simon can take 8+9
to tie it all together.
Please comment, test, apply...
Thanks,
Wolfram
Ben Hutchings (3):
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
Wolfram Sang (6):
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
ARM: shmobile: r8a7790: lager: Enable UHS-I SDR-50
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 | 116 +++++++++++++++++++--
drivers/mmc/host/tmio_mmc.h | 8 +-
drivers/mmc/host/tmio_mmc_pio.c | 102 +++++++++---------
include/linux/mmc/host.h | 31 ++++--
include/linux/mmc/tmio.h | 2 +
8 files changed, 218 insertions(+), 70 deletions(-)
--
2.7.0
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