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由 Stefan Herbrechtsmeier 提交于
The sdhci controller assumes that the base clock frequency is fully supported by the peripheral and doesn't support hardware limitations. The Linux kernel distinguishes between base clock (max_clk) of the host controller and maximum frequency (f_max) of the card interface. Use the same differentiation and allow the platform to constrain the peripheral interface. Signed-off-by: NStefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
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