openwrt/target/linux/sunxi/patches-3.14/137-1-pinctrl-create-irq-pin-mapping.patch

From 4c228d02d1339a286e259893062ea445be82b573 Mon Sep 17 00:00:00 2001
From: Chen-Yu Tsai <wens@csie.org>
Date: Tue, 7 Jan 2014 18:56:29 +0800
Subject: [PATCH] pinctrl: sunxi: create irq/pin mapping during init

The irq/pin mapping is used to lookup the pin to mux to the irq
function when the irq is enabled. It is created when gpio_to_irq
is called. Creating the mapping during init allows us to map the
interrupts directly from the device tree.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
 drivers/pinctrl/pinctrl-sunxi.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/pinctrl/pinctrl-sunxi.c
+++ b/drivers/pinctrl/pinctrl-sunxi.c
@@ -531,8 +531,6 @@ static int sunxi_pinctrl_gpio_to_irq(str
 	if (!desc)
 		return -EINVAL;
 
-	pctl->irq_array[desc->irqnum] = offset;
-
 	dev_dbg(chip->dev, "%s: request IRQ for GPIO %d, return %d\n",
 		chip->label, offset + chip->base, desc->irqnum);
 
@@ -759,6 +757,9 @@ static int sunxi_pinctrl_build_state(str
 		struct sunxi_desc_function *func = pin->functions;
 
 		while (func->name) {
+			/* Create interrupt mapping while we're at it */
+			if (!strcmp(func->name, "irq"))
+				pctl->irq_array[func->irqnum] = pin->pin.number;
 			sunxi_pinctrl_add_function(pctl, func->name);
 			func++;
 		}