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arch/arm64/Imx9: usdhc improvements #18403

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Merged
linguini1 merged 3 commits into from
Feb 16, 2026
+268 −174
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arch/arm64/Imx9: usdhc improvements #18403

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9377e98
arch/imx9: Fix uSDHC driver DMA and cache compilation flags
jlaitine Feb 16, 2026
e09df71
imx9: Add proper initialization of the SD card with different bus speeds
jlaitine Feb 12, 2026
fde0b41
arch/imx9: Increase uSDHC root clock to 400MHz
jlaitine Feb 16, 2026
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1 change: 1 addition & 0 deletions arch/arm64/src/imx9/hardware/imx9_usdhc.h
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Original file line number Diff line number Diff line change
Expand Up @@ -340,6 +340,7 @@
# define USDHC_SYSCTL_SDCLKFS_DIV64 (0x20 << USDHC_SYSCTL_SDCLKFS_SHIFT) /* Base clock / 64 */
# define USDHC_SYSCTL_SDCLKFS_DIV128 (0x40 << USDHC_SYSCTL_SDCLKFS_SHIFT) /* Base clock / 128 */
# define USDHC_SYSCTL_SDCLKFS_DIV256 (0x80 << USDHC_SYSCTL_SDCLKFS_SHIFT) /* Base clock / 256 */
# define USDHC_SYSCTL_SDCLKFS_DIV(p) (((p) >> 1) << USDHC_SYSCTL_SDCLKFS_SHIFT)

#define USDHC_SYSCTL_DTOCV_SHIFT (16) /* Bits 16-19: Data Timeout Counter Value */
#define USDHC_SYSCTL_DTOCV_MASK (0xf << USDHC_SYSCTL_DTOCV_SHIFT)
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