This patch adds the SDHCI support for APM X-Gene SoC using ARASAN SDHCI controller.

v1 change:
 * Use the CONFIG_ARM64_DMA_HAS_IOMMU for dma-mapping.

v2 change:
 * Drop the IOMMU support and switching to PIO mode for arasan.
   controller integrated inside APM X-Gene SoC.

v3 change:
 * Change the sdhci-of-arasan.c to support arasan4.9a.
 * Add quirks for arasan4.9a.

v4 change:
 * Cleanup the Documentation and dts.

Signed-off-by: Suman Tripathi <redacted>
---

Suman Tripathi (3):
  arm64: dts: Add the arasan sdhc nodes in apm-storm.dtsi.
  mmc: host: arasan: Add the support for sdhci-arasan4.9a in
    sdhci-of-arasan.c
  Documentation: mmc: Update Arasan SDHC documentation to support 4.9a
    version of     Arasan SDHC controller.

 .../devicetree/bindings/mmc/arasan,sdhci.txt       |  3 +-
 arch/arm64/boot/dts/apm-mustang.dts                |  4 ++
 arch/arm64/boot/dts/apm-storm.dtsi                 | 44 ++++++++++++++++++++++
 drivers/mmc/host/sdhci-of-arasan.c                 |  7 ++++
 4 files changed, 57 insertions(+), 1 deletion(-)

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1.8.2.1