pinctrl: sunxi: support multiple pin controller

Add support for multiple pin controller instances.

First remove the static definition of the sunxi gpio chip struct and fill
the dynamically struct instead.
Then define a new pin_base field in the sunxi_pinctrl_desc which will be
used to specify the gpiochip base pin.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/pinctrl-sunxi.c b/drivers/pinctrl/pinctrl-sunxi.c
index 73d11e2..6db1c9e 100644 (file)
--- a/drivers/pinctrl/pinctrl-sunxi.c
+++ b/drivers/pinctrl/pinctrl-sunxi.c
@@ -538,19 +538,6 @@ static int sunxi_pinctrl_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
        return irq_find_mapping(pctl->domain, desc->irqnum);
 }
 
-static struct gpio_chip sunxi_pinctrl_gpio_chip = {
-       .owner                  = THIS_MODULE,
-       .request                = sunxi_pinctrl_gpio_request,
-       .free                   = sunxi_pinctrl_gpio_free,
-       .direction_input        = sunxi_pinctrl_gpio_direction_input,
-       .direction_output       = sunxi_pinctrl_gpio_direction_output,
-       .get                    = sunxi_pinctrl_gpio_get,
-       .set                    = sunxi_pinctrl_gpio_set,
-       .of_xlate               = sunxi_pinctrl_gpio_of_xlate,
-       .to_irq                 = sunxi_pinctrl_gpio_to_irq,
-       .of_gpio_n_cells        = 3,
-       .can_sleep              = false,
-};
 
 static int sunxi_pinctrl_irq_set_type(struct irq_data *d,
                                      unsigned int type)
@@ -858,11 +845,22 @@ static int sunxi_pinctrl_probe(struct platform_device *pdev)
        }
 
        last_pin = pctl->desc->pins[pctl->desc->npins - 1].pin.number;
-       pctl->chip = &sunxi_pinctrl_gpio_chip;
-       pctl->chip->ngpio = round_up(last_pin, PINS_PER_BANK);
+       pctl->chip->owner = THIS_MODULE;
+       pctl->chip->request = sunxi_pinctrl_gpio_request,
+       pctl->chip->free = sunxi_pinctrl_gpio_free,
+       pctl->chip->direction_input = sunxi_pinctrl_gpio_direction_input,
+       pctl->chip->direction_output = sunxi_pinctrl_gpio_direction_output,
+       pctl->chip->get = sunxi_pinctrl_gpio_get,
+       pctl->chip->set = sunxi_pinctrl_gpio_set,
+       pctl->chip->of_xlate = sunxi_pinctrl_gpio_of_xlate,
+       pctl->chip->to_irq = sunxi_pinctrl_gpio_to_irq,
+       pctl->chip->of_gpio_n_cells = 3,
+       pctl->chip->can_sleep = false,
+       pctl->chip->ngpio = round_up(last_pin, PINS_PER_BANK) -
+                           pctl->desc->pin_base;
        pctl->chip->label = dev_name(&pdev->dev);
        pctl->chip->dev = &pdev->dev;
-       pctl->chip->base = 0;
+       pctl->chip->base = pctl->desc->pin_base;
 
        ret = gpiochip_add(pctl->chip);
        if (ret)

diff --git a/drivers/pinctrl/pinctrl-sunxi.h b/drivers/pinctrl/pinctrl-sunxi.h
index ed3c4d7..35d15b2 100644 (file)
--- a/drivers/pinctrl/pinctrl-sunxi.h
+++ b/drivers/pinctrl/pinctrl-sunxi.h
@@ -450,6 +450,7 @@ struct sunxi_pinctrl_desc {
        int                             npins;
        struct pinctrl_gpio_range       *ranges;
        int                             nranges;
+       unsigned                        pin_base;
 };
 
 struct sunxi_pinctrl_function {