linux-kernel - Re: [PATCH v5 1/3] PCI: rockchip: Add support for pcie wake irq

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Message-ID: <20171013015620.GA94568@google.com>
Date:   Thu, 12 Oct 2017 18:56:22 -0700
From:   Brian Norris <briannorris@...omium.org>
To:     Jeffy Chen <jeffy.chen@...k-chips.com>
Cc:     linux-kernel@...r.kernel.org, bhelgaas@...gle.com,
        shawn.lin@...k-chips.com, dianders@...omium.org,
        Heiko Stuebner <heiko@...ech.de>, linux-pci@...r.kernel.org,
        linux-rockchip@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v5 1/3] PCI: rockchip: Add support for pcie wake irq

Hi,

On Mon, Sep 11, 2017 at 11:10:27PM +0800, Jeffy Chen wrote:
> Add support for PCIE_WAKE pin in rockchip pcie driver.
> 
> Signed-off-by: Jeffy Chen <jeffy.chen@...k-chips.com>
> ---
> 
> Changes in v5:
> Rebase
> 
> Changes in v3:
> Fix error handling
> 
> Changes in v2:
> Use dev_pm_set_dedicated_wake_irq
>         -- Suggested by Brian Norris <briannorris@...omium.com>
> 
>  drivers/pci/host/pcie-rockchip.c | 19 +++++++++++++++++--
>  1 file changed, 17 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c
> index 9051c6c8fea4..a8b7272597a7 100644
> --- a/drivers/pci/host/pcie-rockchip.c
> +++ b/drivers/pci/host/pcie-rockchip.c
> @@ -37,6 +37,7 @@
>  #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>
>  
> @@ -995,6 +996,15 @@ static int rockchip_pcie_setup_irq(struct rockchip_pcie *rockchip)
>  		return err;
>  	}
>  
> +	/* Must init wakeup before setting dedicated wakeup irq. */
> +	device_init_wakeup(dev, true);

Am I crazy, or should this go inside the 'irq >= 0' conditional?
Otherwise, for the whole series:

Reviewed-by: Brian Norris <briannorris@...omium.org>
Tested-by: Brian Norris <briannorris@...omium.org>

Bjorn, were you planning to pick this up?

Also, the DT binding change conflicts (just simple context) with the
PERST# series I just sent out. Would be good if we could land one or
both :)

Thanks,
Brian

> +	irq = platform_get_irq_byname(pdev, "wakeup");
> +	if (irq >= 0) {
> +		err = dev_pm_set_dedicated_wake_irq(dev, irq);
> +		if (err)
> +			dev_err(dev, "failed to setup PCIe wakeup IRQ\n");
> +	}
> +
>  	return 0;
>  }
>  
> @@ -1542,11 +1552,11 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
>  
>  	err = rockchip_pcie_parse_dt(rockchip);
>  	if (err)
> -		return err;
> +		goto err_disable_wake;
>  
>  	err = rockchip_pcie_enable_clocks(rockchip);
>  	if (err)
> -		return err;
> +		goto err_disable_wake;
>  
>  	err = rockchip_pcie_set_vpcie(rockchip);
>  	if (err) {
> @@ -1656,6 +1666,9 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
>  		regulator_disable(rockchip->vpcie0v9);
>  err_set_vpcie:
>  	rockchip_pcie_disable_clocks(rockchip);
> +err_disable_wake:
> +	dev_pm_clear_wake_irq(dev);
> +	device_init_wakeup(dev, false);
>  	return err;
>  }
>  
> @@ -1682,6 +1695,8 @@ static int rockchip_pcie_remove(struct platform_device *pdev)
>  	if (!IS_ERR(rockchip->vpcie0v9))
>  		regulator_disable(rockchip->vpcie0v9);
>  
> +	dev_pm_clear_wake_irq(dev);
> +	device_init_wakeup(dev, false);
>  	return 0;
>  }
>  
> -- 
> 2.11.0
> 
>