Commit 7f294e49 authored Jul 08, 2011 by Linus Walleij Committed by Russell King Jul 19, 2011

ARM: 6981/2: mmci: adjust calculation of f_min



The ARM version maximum clock divider is 512 whereas for the ST
variants it's 257. Let's use DIV_ROUND_UP() for both cases so we
can see clearly what's going on here.

[Use DIV_ROUND_UP to clarify elder code]

Signed-off-by: Ulf Hansson <ulf.hansson@stericsson.com>
Reviewed-by: Sebastian Rasmussen <sebastian.rasmussen@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent eb96c925

drivers/mmc/host/mmci.c

+9 −1

Original line number	Diff line number	Diff line
		@@ -1061,7 +1061,15 @@ static int __devinit mmci_probe(struct amba_device *dev,
		}

		mmc->ops = &mmci_ops;
		mmc->f_min = (host->mclk + 511) / 512;
		/*
		* The ARM and ST versions of the block have slightly different
		* clock divider equations which means that the minimum divider
		* differs too.
		*/
		if (variant->st_clkdiv)
		mmc->f_min = DIV_ROUND_UP(host->mclk, 257);
		else
		mmc->f_min = DIV_ROUND_UP(host->mclk, 512);
		/*
		* If the platform data supplies a maximum operating
		* frequency, this takes precedence. Else, we fall back

Admin message