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SubjectRe: [RFC PATCH v2 1/3] PCI: rockchip: Add support for pcie wake irq
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Hi Jeffy

On 2017/8/17 20:04, Jeffy Chen wrote:
> Add support for PCIE_WAKE pin in rockchip pcie driver.
>
> Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
> ---
>
> Changes in v2:
> Use dev_pm_set_dedicated_wake_irq
> -- Suggested by Brian Norris <briannorris@chromium.com>
>
> drivers/pci/host/pcie-rockchip.c | 13 ++++++++++++-
> 1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c
> index 7bb9870f6d8c..c2b973c738fe 100644
> --- a/drivers/pci/host/pcie-rockchip.c
> +++ b/drivers/pci/host/pcie-rockchip.c
> @@ -36,6 +36,7 @@
> #include <linux/pci_ids.h>
> #include <linux/phy/phy.h>
> #include <linux/platform_device.h>
> +#include <linux/pm_wakeirq.h>
> #include <linux/reset.h>
> #include <linux/regmap.h>
>
> @@ -853,7 +854,6 @@ static void rockchip_pcie_legacy_int_handler(struct irq_desc *desc)
> chained_irq_exit(chip, desc);
> }
>
> -
> /**
> * rockchip_pcie_parse_dt - Parse Device Tree
> * @rockchip: PCIe port information
> @@ -1018,6 +1018,14 @@ static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
> return err;
> }
>
> + device_init_wakeup(dev, true);
> + irq = platform_get_irq_byname(pdev, "wake");
> + if (irq >= 0) {
> + err = dev_pm_set_dedicated_wake_irq(dev, irq);
> + if (err)
> + dev_err(dev, "failed to setup PCIe wake IRQ\n");
> + }
> +
> rockchip->vpcie3v3 = devm_regulator_get_optional(dev, "vpcie3v3");
> if (IS_ERR(rockchip->vpcie3v3)) {
> if (PTR_ERR(rockchip->vpcie3v3) == -EPROBE_DEFER)
> @@ -1524,6 +1532,9 @@ static int rockchip_pcie_remove(struct platform_device *pdev)
> struct device *dev = &pdev->dev;
> struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
>
> + dev_pm_clear_wake_irq(dev);
> + device_init_wakeup(dev, false);
> +

Looks good overall but I think we need this on the
error handling path of rockchip_pcie_probe as well?

> pci_stop_root_bus(rockchip->root_bus);
> pci_remove_root_bus(rockchip->root_bus);
> pci_unmap_iospace(rockchip->io);
>

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