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

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On Sat, 16 Jul 2016, Arnd Bergmann wrote:

> 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?

Unlike the other SoC's supported by pci-mvebu.c, orion5x has one PCI port 
as well as a PCIe port. Given no other orion5x boards seem to use 
pci-mvebu, I'm assuming there's work to be done before the PCI port can be 
used via. pci-mvebu.c

This is something I can look into if there aren't patches out there, but 
wanted to get the rest into a reasonable state first.

>
> 	Arnd
>

-- 
Jamie Lentin

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[PATCH v0 00/10] Convert Netgear WNR854T to devicetree Jamie Lentin <jm@lentin.co.uk> - 2016-07-16 17:10 +0200
  [PATCH v0 09/10] net: phy: Re-attempt custom DT configuration after configuration Jamie Lentin <jm@lentin.co.uk> - 2016-07-16 17:10 +0200
    Re: [PATCH v0 09/10] net: phy: Re-attempt custom DT configuration  after configuration Andrew Lunn <andrew@lunn.ch> - 2016-07-16 18:50 +0200
  [PATCH v0 03/10] arm: orion5x: Add clk support for mv88f5181 Jamie Lentin <jm@lentin.co.uk> - 2016-07-16 17:10 +0200
    Re: [PATCH v0 03/10] arm: orion5x: Add clk support for mv88f5181 Andrew Lunn <andrew@lunn.ch> - 2016-07-16 18:20 +0200
    Re: [PATCH v0 03/10] arm: orion5x: Add clk support for mv88f5181 Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2016-07-16 19:40 +0200
    Re: [PATCH v0 03/10] arm: orion5x: Add clk support for mv88f5181 Rob Herring <robh@kernel.org> - 2016-07-17 22:40 +0200
  [PATCH v0 01/10] arm: orion5x: Add required properties for orion-wdt to DT node Jamie Lentin <jm@lentin.co.uk> - 2016-07-16 17:10 +0200
    Re: [PATCH v0 01/10] arm: orion5x: Add required properties for  orion-wdt to DT node Andrew Lunn <andrew@lunn.ch> - 2016-07-16 18:10 +0200
  [PATCH v0 10/10] arm: orion5x: Configure Netgear WNR854T network port LEDs Jamie Lentin <jm@lentin.co.uk> - 2016-07-16 17:10 +0200
  [PATCH v0 06/10] arm: orion5x: Add DT-based support for Netgear WNR854T Jamie Lentin <jm@lentin.co.uk> - 2016-07-16 17:10 +0200
    Re: [PATCH v0 06/10] arm: orion5x: Add DT-based support for Netgear  WNR854T Andrew Lunn <andrew@lunn.ch> - 2016-07-16 18:40 +0200
    Re: [PATCH v0 06/10] arm: orion5x: Add DT-based support for Netgear  WNR854T Andrew Lunn <andrew@lunn.ch> - 2016-07-16 18:40 +0200
    Re: [PATCH v0 06/10] arm: orion5x: Add DT-based support for Netgear WNR854T Arnd Bergmann <arnd@arndb.de> - 2016-07-16 21:20 +0200
      Re: [PATCH v0 06/10] arm: orion5x: Add DT-based support for Netgear  WNR854T Jamie Lentin <jm@lentin.co.uk> - 2016-07-17 12:10 +0200
        Re: [PATCH v0 06/10] arm: orion5x: Add DT-based support for Netgear WNR854T Arnd Bergmann <arnd@arndb.de> - 2016-07-17 22:50 +0200
          Re: [PATCH v0 06/10] arm: orion5x: Add DT-based support for Netgear  WNR854T Thomas Petazzoni <thomas.petazzoni@free-electrons.com> - 2016-07-18 11:50 +0200
            Re: [PATCH v0 06/10] arm: orion5x: Add DT-based support for Netgear WNR854T Arnd Bergmann <arnd@arndb.de> - 2016-07-18 12:10 +0200
              Re: [PATCH v0 06/10] arm: orion5x: Add DT-based support for Netgear WNR854T Arnd Bergmann <arnd@arndb.de> - 2016-07-19 11:50 +0200
              Re: [PATCH v0 06/10] arm: orion5x: Add DT-based support for Netgear  WNR854T Jamie Lentin <jm@lentin.co.uk> - 2016-07-19 12:10 +0200
    Re: [PATCH v0 06/10] arm: orion5x: Add DT-based support for Netgear  WNR854T Rob Herring <robh@kernel.org> - 2016-07-17 23:00 +0200
      Re: [PATCH v0 06/10] arm: orion5x: Add DT-based support for Netgear  WNR854T Jamie Lentin <jm@lentin.co.uk> - 2016-07-19 11:50 +0200
  [PATCH v0 07/10] arm: orion5x: Remove old non-DT-based WNR854T support Jamie Lentin <jm@lentin.co.uk> - 2016-07-16 17:10 +0200
    Re: [PATCH v0 07/10] arm: orion5x: Remove old non-DT-based WNR854T  support Andrew Lunn <andrew@lunn.ch> - 2016-07-16 18:40 +0200
  [PATCH v0 04/10] arm: orion5x: Generalise mv88f5181l pinctrl support for 88f5181 Jamie Lentin <jm@lentin.co.uk> - 2016-07-16 17:10 +0200
    Re: [PATCH v0 04/10] arm: orion5x: Generalise mv88f5181l pinctrl  support for 88f5181 Andrew Lunn <andrew@lunn.ch> - 2016-07-16 18:20 +0200
    Re: [PATCH v0 04/10] arm: orion5x: Generalise mv88f5181l pinctrl  support for 88f5181 Rob Herring <robh@kernel.org> - 2016-07-17 22:50 +0200

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