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authorGreg Malysa <greg.malysa@timesys.com>2024-03-25 22:28:08 -0400
committerJaehoon Chung <jh80.chung@samsung.com>2024-04-26 15:31:11 +0900
commit5359cd1135d069a3033bda65d3e72a3c4a76160d (patch)
tree750c7da4bfb8a9e56e536208bcdd4edd69a4dcae /board/compulab/imx8mm-cl-iot-gate/ddr/ddr.c
parent5f0714496869b95e57a8b72192089e7df18c94cf (diff)
mmc: Support 32-bit only ADMA on 64-bit platforms
Some arm64 platforms may include SDIO host controllers that only support 32-bit ADMA. While the Linux kernel detects which size is supported and adjusts the descriptor size used dynamically, the previous u-boot implementation statically selected between the two depending on whether DMA_ADDR_T_64BIT was defined. Because the static selection is already in place and effective for most platforms, this patch logically separates "64 bit addresses are used for DMA on this platform" and "64 bit addresses are used by the SDIO host controller for ADMA" in order to support the small number of platforms where these statements are not equivalent. Using 32 bits is opt-in and existing 64 bit platforms should be unaffected by this change. Co-developed-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com> Signed-off-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com> Co-developed-by: Ian Roberts <ian.roberts@timesys.com> Signed-off-by: Ian Roberts <ian.roberts@timesys.com> Signed-off-by: Greg Malysa <greg.malysa@timesys.com> Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Diffstat (limited to 'board/compulab/imx8mm-cl-iot-gate/ddr/ddr.c')
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