From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Thu, 22 May 2014 18:07:35 +0000 (+0200)
Subject: spi: rspi: Round up division to avoid slave overclocking
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~39^2~29^2~1^4~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3beb61dbfcf188399cbc36ce1eeb8b2ba724de38;p=pandora-kernel.git

spi: rspi: Round up division to avoid slave overclocking

The calculation of the bit rate divider used a standard C division, which
rounds down the quotient. This may lead to a higher bitrate than requested.
Round up to avoid this.

E.g. on Koelsch, the SPI flash (configured for 30 MHz) was driven at 48.75
MHz. After this patch it's driven at a safe 24.375 MHz.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
---

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