spi: spi-sh-msiof: round up div to fix freq calculation

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Truncation on integer division in sh_msiof_spi_set_clk_regs()
results in insufficient transfer frequency (> max_speed_freq).

For example, source 52MHz, required max 6MHz
 52/6 = 8.6 --> 8, then 1/8 table selected,
and result in 52/8 = 6.5 MHz (>6MHz)

Rounding it up is a simple solution.
 52/6 = 8.6 --> 9, then 1/16 table selected,
and result in 52/16 = 3.25 MHz

Signed-off-by: Takashi Yoshii <takasi-y@ops.dti.ne.jp>
Signed-off-by: Mark Brown <broonie@linaro.org>

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Takashi Yoshii 2013-12-02 03:19:13 +09:00 • committed by Mark Brown

parent 6ce4eac1f6

commit e4d313ff79

1 changed files with 1 additions and 1 deletions

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drivers/spi/spi-sh-msiof.c

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