[PATCH v0 06/10] arm: orion5x: Add DT-based support for Netgear WNR854T

Arnd Bergmann
2016-07-16T19:10:38Z

On Saturday, July 16, 2016 3:29:04 PM CEST Jamie Lentin wrote:
> +
> +#define WNR854T_PCI_SLOT0_OFFS 7
> +#define WNR854T_PCI_SLOT0_IRQ_PIN 4
> +
> +static void __init wnr854t_pci_preinit(void)
> +{
> + int pin;
> +
> + /*
> + * Configure PCI GPIO IRQ pins
> + */
> + pin = WNR854T_PCI_SLOT0_IRQ_PIN;
> + if (gpio_request(pin, "PCI Int") == 0) {
> + if (gpio_direction_input(pin) == 0) {
> + irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
> + } else {
> + pr_err("wnr854t_pci_preinit failed to set_irq_type pin %d\n",
> + pin);
> + gpio_free(pin);
> + }
> + } else {
> + pr_err("wnr854t_pci_preinit failed to request gpio %d\n", pin);
> + }
> +}
> +
> +static int __init wnr854t_pci_map_irq(const struct pci_dev *dev, u8 slot,
> + u8 pin)
> +{
> + int irq;
> +
> + /*
> + * Check for devices with hard-wired IRQs.
> + */
> + irq = orion5x_pci_map_irq(dev, slot, pin);
> + if (irq != -1)
> + return irq;
> +
> + /*
> + * PCI IRQs are connected via GPIOs
> + */
> + switch (slot - WNR854T_PCI_SLOT0_OFFS) {
> + case 0:
> + return gpio_to_irq(WNR854T_PCI_SLOT0_IRQ_PIN);
> + default:
> + return -1;
> + }
> +}

The other patches all appear good to me, but I find this one suspicious.

Why are you not using the device tree for probing PCI? Is there anything
missing in drivers/pci/host/pci-mvebu.c, or do you just need help
describing it in DT?

Arnd