Re: [PATCH v2 0/2] Add StarFive JHB100 DWCMSHC controller support

[Ulf Hansson]

On Wed, Sep 30, 2026 at 12:33 PM Changhuang Liang
<changhuang.liang@xxxxxxxxxxxxxxxx> wrote:
>
> Add DWCMSHC controller driver for StarFive JHB100 SoC.
> This series has been tested on the JHB100 EVB1 board.
>
> Due to syscon limitations, it is necessary to use dma-ranges
> to restrict the DMA address space of the eMMC controller to:
> [0x400000000 - 0x4ffffffff]
>
> bus_nioc_4g: bus_nioc_4g {
>         compatible = "simple-bus";
>         #address-cells = <2>;
>         #size-cells = <2>;
>         dma-noncoherent;
>         ranges;
>         dma-ranges = <0x4 0x00000000 0x0 0x40000000 0x1 0x0>,
>                      <0x4 0x00000000 0x4 0x00000000 0x1 0x0>;
>
>         emmc0: mmc@11b00000 {
>                 compatible = "starfive,jhb100-dwcmshc";
>                 reg = <0x0 0x11b00000 0x0 0x10000>;
>         };
> };
>
> Changes since v1:
>
> patch 1:
> - Add Krzysztof's Reviewed-by tag
>
> patch 2:
> - Fix the DMA address range error in the commit message
> - Clarify the 36-bit DMA capability and its constraints
> - Add a named macro for the JHB100 delay line value
> - Use dwcmshc_reset instead of sdhci_reset
> - Detect 1.8V capability from mmc->caps/caps2 instead of DT properties
> - In sdhci_jhb100_set_clock(), keep cclk_tx gated when clock is 0.
>
> v1: https://lore.kernel.org/all/20260919092950.178617-1-changhuang.liang@xxxxxxxxxxxxxxxx/
>
> Changhuang Liang (2):
>   dt-bindings: mmc: snps,dwcmshc-sdhci: Add starfive,jhb100-dwcmshc
>   mmc: sdhci-of-dwcmshc: Add support for StarFive JHB100
>
>  .../bindings/mmc/snps,dwcmshc-sdhci.yaml      |  74 +++++++-
>  drivers/mmc/host/sdhci-of-dwcmshc.c           | 169 ++++++++++++++++++
>  2 files changed, 239 insertions(+), 4 deletions(-)
>

Applied for next, thanks!

Kind regards
Uffe