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authorChen-Yu Tsai <wens@csie.org>2014-05-26 09:47:56 +0200
committerLinus Walleij <linus.walleij@linaro.org>2014-05-27 16:11:30 +0200
commitd54e9a28ca0fe69ec3965f9a19fdc42628f9a0e0 (patch)
treea68a888c9475898dd754bd17919cd9675510d228 /drivers/pinctrl
parentdb388dfb90368638ad238c27b045b6c9bf1f6c17 (diff)
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. Originally the IRQ to pin mapping was created when gpio_to_irq was called with a GPIO handle. The mapping in turn is used to mux the pin into EINT mode. If the mapping is created during gpio_to_irq, we can't use the interrupts directly, i.e. through the DT with "interrupts = <&pio A 4>". Instead we'd have to use "gpios = <&pio A B>", then pass the gpio through to gpio_to_irq. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r--drivers/pinctrl/sunxi/pinctrl-sunxi.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
index 42963480848d..f1ca75e6d7b1 100644
--- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c
+++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
@@ -525,8 +525,6 @@ static int sunxi_pinctrl_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
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);
@@ -727,6 +725,9 @@ static int sunxi_pinctrl_build_state(struct platform_device *pdev)
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++;
}