sdhci: be more strict with get_min_clock() usage
get_min_clock() makes sense only with NONSTANDARD_CLOCK quirk and when set_clock() callback is specified. The patch should cause no functional changes, it just makes the code self-documented and avoids any possible misuse of get_min_clock(). Suggested-by: Pierre Ossman <pierre@ossman.eu> Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Cc: Ian Molton <ian@mnementh.co.uk> Cc: Matt Fleming <matt@console-pimps.org> Cc: Philip Langdale <philipl@overt.org> Cc: Pierre Ossman <pierre@ossman.eu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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