From: Kukjin Kim <kgene.kim@samsung.com>
Date: Mon, 30 Aug 2010 03:07:58 +0000 (+0900)
Subject: ARM: SAMSUNG: Fix on s5p_gpio_[get,set]_drvstr
X-Git-Tag: v2.6.36-rc5~13^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cbd2780fcefc370732c1f1526fb784573308177d;p=pandora-kernel.git

ARM: SAMSUNG: Fix on s5p_gpio_[get,set]_drvstr

This patch fixes bug on gpio drive strength helper function.

The offset should be like follwoing.
-       off = chip->chip.base - pin;
+       off = pin - chip->chip.base;

In the s5p_gpio_get_drvstr(),
the second line is unnecessary, because overwrite drvstr.
        drvstr = __raw_readl(reg);
-       drvstr = 0xffff & (0x3 << shift);

And need 2bit masking before return the drvstr value.
        drvstr = drvstr >> shift;
+       drvstr &= 0x3;

In the s5p_gpio_set_drvstr(), need relevant bit clear.
        tmp = __raw_readl(reg);
+       tmp &= ~(0x3 << shift);
        tmp |= drvstr << shift;

Reported-by: Jaecheol Lee <jc.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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