gpio: mpc8xxx: handle differences between incarnations at a single place
The gpio controllers that are handled by the mpc8xxx driver differ
slightly. Up to now some differences were handled by use of
of_device_is_compatible, others by use of struct of_device_id's data.
To make this consistent and easily extendable handle the differences at
a single place.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index 0e2dbbb..8364944 100644
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -312,17 +312,13 @@
.irq_unmask = mpc8xxx_irq_unmask,
.irq_mask = mpc8xxx_irq_mask,
.irq_ack = mpc8xxx_irq_ack,
+ /* this might get overwritten in mpc8xxx_probe() */
.irq_set_type = mpc8xxx_irq_set_type,
};
static int mpc8xxx_gpio_irq_map(struct irq_domain *h, unsigned int irq,
irq_hw_number_t hwirq)
{
- struct mpc8xxx_gpio_chip *mpc8xxx_gc = h->host_data;
-
- if (mpc8xxx_gc->of_dev_id_data)
- mpc8xxx_irq_chip.irq_set_type = mpc8xxx_gc->of_dev_id_data;
-
irq_set_chip_data(irq, h->host_data);
irq_set_chip_and_handler(irq, &mpc8xxx_irq_chip, handle_level_irq);
@@ -334,11 +330,32 @@
.xlate = irq_domain_xlate_twocell,
};
+struct mpc8xxx_gpio_devtype {
+ int (*gpio_dir_out)(struct gpio_chip *, unsigned int, int);
+ int (*gpio_get)(struct gpio_chip *, unsigned int);
+ int (*irq_set_type)(struct irq_data *, unsigned int);
+};
+
+static const struct mpc8xxx_gpio_devtype mpc512x_gpio_devtype = {
+ .gpio_dir_out = mpc5121_gpio_dir_out,
+ .irq_set_type = mpc512x_irq_set_type,
+};
+
+static const struct mpc8xxx_gpio_devtype mpc8572_gpio_devtype = {
+ .gpio_get = mpc8572_gpio_get,
+};
+
+static const struct mpc8xxx_gpio_devtype mpc8xxx_gpio_devtype_default = {
+ .gpio_dir_out = mpc8xxx_gpio_dir_out,
+ .gpio_get = mpc8xxx_gpio_get,
+ .irq_set_type = mpc8xxx_irq_set_type,
+};
+
static const struct of_device_id mpc8xxx_gpio_ids[] = {
{ .compatible = "fsl,mpc8349-gpio", },
- { .compatible = "fsl,mpc8572-gpio", },
+ { .compatible = "fsl,mpc8572-gpio", .data = &mpc8572_gpio_devtype, },
{ .compatible = "fsl,mpc8610-gpio", },
- { .compatible = "fsl,mpc5121-gpio", .data = mpc512x_irq_set_type, },
+ { .compatible = "fsl,mpc5121-gpio", .data = &mpc512x_gpio_devtype, },
{ .compatible = "fsl,pq3-gpio", },
{ .compatible = "fsl,qoriq-gpio", },
{}
@@ -351,6 +368,8 @@
struct of_mm_gpio_chip *mm_gc;
struct gpio_chip *gc;
const struct of_device_id *id;
+ const struct mpc8xxx_gpio_devtype *devtype =
+ of_device_get_match_data(&pdev->dev);
int ret;
mpc8xxx_gc = devm_kzalloc(&pdev->dev, sizeof(*mpc8xxx_gc), GFP_KERNEL);
@@ -367,10 +386,18 @@
mm_gc->save_regs = mpc8xxx_gpio_save_regs;
gc->ngpio = MPC8XXX_GPIO_PINS;
gc->direction_input = mpc8xxx_gpio_dir_in;
- gc->direction_output = of_device_is_compatible(np, "fsl,mpc5121-gpio") ?
- mpc5121_gpio_dir_out : mpc8xxx_gpio_dir_out;
- gc->get = of_device_is_compatible(np, "fsl,mpc8572-gpio") ?
- mpc8572_gpio_get : mpc8xxx_gpio_get;
+
+ if (!devtype)
+ devtype = &mpc8xxx_gpio_devtype_default;
+
+ /*
+ * It's assumed that only a single type of gpio controller is available
+ * on the current machine, so overwriting global data is fine.
+ */
+ mpc8xxx_irq_chip.irq_set_type = devtype->irq_set_type;
+
+ gc->direction_output = devtype->gpio_dir_out ?: mpc8xxx_gpio_dir_out;
+ gc->get = devtype->gpio_get ?: mpc8xxx_gpio_get;
gc->set = mpc8xxx_gpio_set;
gc->set_multiple = mpc8xxx_gpio_set_multiple;
gc->to_irq = mpc8xxx_gpio_to_irq;