On Thu, Dec 08, 2016 at 09:50:55PM +0900, Masahiro Yamada wrote: > Add a driver for the Cadence SD4HC SD/SDIO/eMMC Controller. > > For SD, it basically relies on the SDHCI standard code. > For eMMC, this driver provides some callbacks to support the > hardware part that is specific to this IP design. > > Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx> > Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx> > --- > > Changes in v5: > - Fix calculation of the center of the tuned window > > Changes in v4: > - Override mmc_host_ops.execute_tuning instead of the > .platform_execute_tuning implementation > > Changes in v3: > - Remove unneeded explanation about HRS and SRS from DT binding; > the offsets to HRS/SRS are fixed for this hardware and this is > quite normal, like each hardware has a fixed register view except > the register base. The detailed register map is what the driver > cares about, so no need to explain it in the binding. > > Changes in v2: > - Remove unnecessary "select MMC_SDHCI_IO_ACCESSORS" > > .../devicetree/bindings/mmc/sdhci-cadence.txt | 30 +++ > drivers/mmc/host/Kconfig | 11 + > drivers/mmc/host/Makefile | 1 + > drivers/mmc/host/sdhci-cadence.c | 283 +++++++++++++++++++++ > 4 files changed, 325 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mmc/sdhci-cadence.txt > create mode 100644 drivers/mmc/host/sdhci-cadence.c > > diff --git a/Documentation/devicetree/bindings/mmc/sdhci-cadence.txt b/Documentation/devicetree/bindings/mmc/sdhci-cadence.txt > new file mode 100644 > index 0000000..750374f > --- /dev/null > +++ b/Documentation/devicetree/bindings/mmc/sdhci-cadence.txt > @@ -0,0 +1,30 @@ > +* Cadence SD/SDIO/eMMC Host Controller > + > +Required properties: > +- compatible: should be "cdns,sd4hc". Needs SoC specific compatible strings too. > +- reg: offset and length of the register set for the device. > +- interrupts: a single interrupt specifier. > +- clocks: phandle to the input clock. > + > +Optional properties: > +For eMMC configuration, supported speed modes are not indicated by the SDHCI > +Capabilities Register. Instead, the following properties should be specified > +if supported. See mmc.txt for details. > +- mmc-ddr-1_8v > +- mmc-ddr-1_2v > +- mmc-hs200-1_8v > +- mmc-hs200-1_2v > +- mmc-hs400-1_8v > +- mmc-hs400-1_2v There's now a property to override SDHCI capabilities register. Maybe you should use that instead? I'll defer to Ulf. > + > +Example: > + emmc: sdhci@5a000000 { > + compatible = "cdns,sd4hc"; > + reg = <0x5a000000 0x400>; > + interrupts = <0 78 4>; > + clocks = <&clk 4>; > + bus-width = <8>; > + mmc-ddr-1_8v; > + mmc-hs200-1_8v; > + mmc-hs400-1_8v; > + }; -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html