linux-kernel - [PATCH 3.13 35/40] pinctrl: imx27: fix offset calculation in imx_read

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Message-Id: <20140218224434.322406492@linuxfoundation.org>
Date:	Tue, 18 Feb 2014 14:47:36 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Chris Ruehl <chris.ruehl@...ys.com.hk>,
	Markus Pargmann <mpa@...gutronix.de>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH 3.13 35/40] pinctrl: imx27: fix offset calculation in imx_read_2bit

3.13-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Chris Ruehl <chris.ruehl@...ys.com.hk>

commit e3365d0974ed64157f5b5a576c611057dc40a595 upstream.

The offset for the 2bit register calculate wrong, this patch
fixes the problem. The debugfs printout for oconf, iconfa, iconfb
now shows the real values.

Signed-off-by: Chris Ruehl <chris.ruehl@...ys.com.hk>
Reviewed-by: Markus Pargmann <mpa@...gutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/pinctrl/pinctrl-imx1-core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/pinctrl/pinctrl-imx1-core.c
+++ b/drivers/pinctrl/pinctrl-imx1-core.c
@@ -139,7 +139,7 @@ static int imx1_read_2bit(struct imx1_pi
 		u32 reg_offset)
 {
 	void __iomem *reg = imx1_mem(ipctl, pin_id) + reg_offset;
-	int offset = pin_id % 16;
+	int offset = (pin_id % 16) * 2;
 
 	/* Use the next register if the pin's port pin number is >=16 */
 	if (pin_id % 32 >= 16)


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