[U-Boot] [PATCH v7 0/3] mmc: meson: add MMC support for Meson GX (S905)

[Jaehoon Chung]

Hi Heiner,

On 04/13/2017 03:24 AM, Heiner Kallweit wrote:
> This patch set implements eMMC on Amlogic Meson GX (S905).
> It's based on Carlo Caione's work submitted here:
> http://lists.denx.de/pipermail/u-boot/2016-May/254391.html
> 
> Changes to the original version:
> - BLK support added
> - fully DT-based now
> - minor general refactoring
> 
> The driver was successfully tested on a Odroid C2.
> 
> Note: On Odroid C2 eMMC is MMC device 1. So you have to
> switch from MMC device 0 to 1 first when testing from
> uboot prompt.

I'm not sure but i think that you can use the fixed index for eMMC.
Maybe you can refer to below commit.

commit 02ad33aa3a84821c8d9a6c4f167f143f6248b084
Refs: v2017.03-rc1-170-g02ad33a
Author:     Jaehoon Chung <jh80.chung at samsung.com>
AuthorDate: Thu Feb 2 13:41:14 2017 +0900
Commit:     Jaehoon Chung <jh80.chung at samsung.com>
CommitDate: Thu Feb 9 20:37:05 2017 +0900

    mmc: mmc-uclass: use the fixed devnum with alias node

    If there are alias nodes as "mmc", use the devnum as alias index
    number.
    This patch is for fixing a problem of Exynos4 series.
    Problem is the below thing.

    Current legacy mode:
    EXYNOS DWMMC: 0, SAMSUNG SDHCI: 1

    After using DM:
    SAMSUNG SDHCI: 0, EXYNOS DWMMC: 1

    Dev index is swapped.
    Then u-boot can't find the kernel image..because it is already set to 0 as mmcdev.
    If change from legacy to DM, also needs to touch all exynos4 config file.
    For using simply, just supporting the fixed devnum with alias node is better than it.

    Usage:
    alaise {
            ....
            mmc0 = &sdhci2; /* eMMC */
            mmc1 = &sdhci1; /* SD */
            ...
    }

Anyway, I'm testing your patches with buildman..after that, i will apply..
But this patchset was delegated to Minkyu, so i will change it. if you are ok.

Best Regards,
Jaehoon Chung

> 
> Latest change in v7:
> - rebase due to other recent mmc changes
> 
> Heiner Kallweit (3):
>   arm: dts: update Meson GXBB / Odroid-C2 DT with recent Linux version
>   mmc: meson: add MMC driver for Meson GX (S905)
>   odroid-c2: enable new Meson GX MMC driver in board defconfig
> 
>  arch/arm/dts/meson-gx.dtsi                | 447 +++++++++++++++++++
>  arch/arm/dts/meson-gxbb-odroidc2.dts      | 147 +++++-
>  arch/arm/dts/meson-gxbb.dtsi              | 718 ++++++++++++++++++------------
>  arch/arm/include/asm/arch-meson/sd_emmc.h |  89 ++++
>  configs/odroid-c2_defconfig               |   5 +-
>  drivers/mmc/Kconfig                       |   6 +
>  drivers/mmc/Makefile                      |   1 +
>  drivers/mmc/meson_gx_mmc.c                | 291 ++++++++++++
>  include/dt-bindings/clock/gxbb-aoclkc.h   |  66 +++
>  include/dt-bindings/clock/gxbb-clkc.h     |  34 ++
>  include/dt-bindings/reset/gxbb-aoclkc.h   |  66 +++
>  11 files changed, 1594 insertions(+), 276 deletions(-)
>  create mode 100644 arch/arm/dts/meson-gx.dtsi
>  create mode 100644 arch/arm/include/asm/arch-meson/sd_emmc.h
>  create mode 100644 drivers/mmc/meson_gx_mmc.c
>  create mode 100644 include/dt-bindings/clock/gxbb-aoclkc.h
>  create mode 100644 include/dt-bindings/clock/gxbb-clkc.h
>  create mode 100644 include/dt-bindings/reset/gxbb-aoclkc.h
>