linux-kernel - [PATCH 04/12] pinctrl/nomadik: reuse GPIO debug function for pins

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Date:	Tue, 8 May 2012 11:44:46 +0200
From:	Linus Walleij <linus.walleij@...ricsson.com>
To:	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Cc:	Stephen Warren <swarren@...dia.com>,
	Shawn Guo <shawn.guo@...escale.com>,
	Thomas Abraham <thomas.abraham@...aro.org>,
	Dong Aisheng <dong.aisheng@...aro.org>,
	Rajendra Nayak <rajendra.nayak@...aro.org>,
	Haojian Zhuang <haojian.zhuang@...vell.com>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH 04/12] pinctrl/nomadik: reuse GPIO debug function for pins

From: Linus Walleij <linus.walleij@...aro.org>

Since all pins we can control are GPIOs, match a GPIO range to
each pin in the debug function and call into the GPIO debug
print function to have the per-pin information.

Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
 drivers/pinctrl/pinctrl-nomadik.c |   28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/pinctrl-nomadik.c b/drivers/pinctrl/pinctrl-nomadik.c
index d9e41c9..750703f 100644
--- a/drivers/pinctrl/pinctrl-nomadik.c
+++ b/drivers/pinctrl/pinctrl-nomadik.c
@@ -1332,10 +1332,36 @@ static int nmk_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
 	return 0;
 }
 
+static struct pinctrl_gpio_range *
+nmk_match_gpio_range(struct pinctrl_dev *pctldev, unsigned offset)
+{
+	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
+	int i;
+
+	for (i = 0; i < npct->soc->gpio_num_ranges; i++) {
+		struct pinctrl_gpio_range *range;
+
+		range = &npct->soc->gpio_ranges[i];
+		if (offset >= range->pin_base &&
+		    offset <= (range->pin_base + range->npins - 1))
+			return range;
+	}
+	return NULL;
+}
+
 static void nmk_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
 		   unsigned offset)
 {
-	seq_printf(s, " Nomadik GPIO");
+	struct pinctrl_gpio_range *range;
+	struct gpio_chip *chip;
+
+	range = nmk_match_gpio_range(pctldev, offset);
+	if (!range || !range->gc) {
+		seq_printf(s, "invalid pin offset");
+		return;
+	}
+	chip = range->gc;
+	nmk_gpio_dbg_show_one(s, chip, offset - chip->base, offset);
 }
 
 static struct pinctrl_ops nmk_pinctrl_ops = {
-- 
1.7.9.2

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