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695824f456
Add SDHCI controller driver for Black Sesame Technologies C1200 SoC. This driver supports the DWCMSHC SDHCI controller with BST-specific enhancements including: - Custom clock management and tuning - Power management support - BST-specific register configurations - Support for eMMC and SD card interfaces - Hardware limitation workaround for 32-bit DMA addressing The driver addresses specific hardware constraints where: - System memory uses 64-bit bus, eMMC controller uses 32-bit bus - eMMC controller cannot access memory through SMMU due to hardware bug - All system DRAM is configured outside 4GB boundary (ZONE_DMA32) - Uses SRAM-based bounce buffer within 32-bit address space Signed-off-by: Ge Gordon <gordon.ge@bst.ai> Signed-off-by: Albert Yang <yangzh0906@thundersoft.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
117 lines
4.9 KiB
117 lines
4.9 KiB