This series adds support for UHS-I in sh_mobile_sdhi, partly implemented
in tmio_mmc. This does not yet include tuning for SDR-104, but SDR-50 now
works on the R8A7790 Lager board and another development board.
The pfc block needs to be reconfigured from 3.3V to 1.8V signalling on
the pins wired to the SD card. This is supported by implementing the
pinconf power-source parameter. I expect that several SH SoCs have this
capability, but I only have the R8A7790 data sheet so I only implemented
it for that one.
Changes since v3:
- Change pinconf power-source argument to millivolts instead of boolean
for low voltage
- Rename pinctrl voltage operations accordingly
- Use io{read,write}32() instead of sh_pfc_{read,write}_raw_reg()
- Change tmio, sh_mobile_sdhi to adjust input clock frequency to match
requested bus frequency more closely
- Replace SDHI assigned-clock{,-rate}s properties with max-frequency
- Reorder patch series to put all pinctrl changes first
Changes since v2:
- Implement the pinconf power-source parameter instead of separate
functions for the low-voltage mode
- Adjust low-voltage mode setter function and device tree accordingly
- Add low-voltage mode getter function for R8A7790
Changes since v1:
- Reword commit message for "mmc: tmio: Add UHS-I mode support"
- Make sh_mobile_sdhi_start_signal_voltage_switch() succeed if asked
to switch to 3.3V and the regulator or pinctrl or pinctrl state is
missing
- Drop change to mmcif clock on Lager
- Correct original author for sdhi clock changes on Lager
Changes since the RFC:
- Replace the 'regulator' devices for signal voltage switching with
pinctrl functions and states
- Drop 'mmc: sh_mobile_sdhi: Add actual clock rate support' as it's
redundant
- Use a switch statement in sh_mobile_sdhi_start_signal_voltage_switch()
- Fix subject prefix for the DT changes
Ben.
Ben Hutchings (8):
pinctrl: sh-pfc: Implement pinconf power-source param for voltage
switching
pinctrl: sh-pfc: r8a7790: Implement voltage switching for SDHI
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
mmc: tmio: Add UHS-I mode support
mmc: sh_mobile_sdhi: Add UHS-I mode support
ARM: shmobile: r8a7790: Set maximum frequencies for SDHI clocks
ARM: shmobile: lager: Enable UHS-I SDR-50
.../bindings/pinctrl/renesas,pfc-pinctrl.txt | 4 +-
arch/arm/boot/dts/r8a7790-lager.dts | 22 +++-
arch/arm/boot/dts/r8a7790.dtsi | 4 +
drivers/mmc/host/sh_mobile_sdhi.c | 126 +++++++++++++++++++--
drivers/mmc/host/tmio_mmc.h | 9 +-
drivers/mmc/host/tmio_mmc_pio.c | 56 ++++++---
drivers/pinctrl/sh-pfc/core.c | 2 +-
drivers/pinctrl/sh-pfc/core.h | 1 +
drivers/pinctrl/sh-pfc/pfc-r8a7790.c | 71 +++++++++++-
drivers/pinctrl/sh-pfc/pinctrl.c | 44 ++++++-
drivers/pinctrl/sh-pfc/sh_pfc.h | 5 +
11 files changed, 313 insertions(+), 31 deletions(-)
--
2.1.4
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