| Message ID | 20171013195059.23865-2-jeffy.chen@rock-chips.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Sat, Oct 14, 2017 at 03:50:56AM +0800, 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 v6: > Fix device_init_wake error handling, and add some comments. > > 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@chromium.com> > > drivers/pci/host/pcie-rockchip.c | 27 +++++++++++++++++++++------ > 1 file changed, 21 insertions(+), 6 deletions(-) > > diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c > index 9051c6c8fea4..268513b6c9c4 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 +996,17 @@ static int rockchip_pcie_setup_irq(struct rockchip_pcie *rockchip) > return err; > } > > + irq = platform_get_irq_byname(pdev, "wakeup"); > + if (irq >= 0) { > + /* Must init wakeup before setting dedicated wakeup irq. */ > + device_init_wakeup(dev, true); > + err = dev_pm_set_dedicated_wake_irq(dev, irq); > + if (err) { > + dev_err(dev, "failed to setup PCIe wakeup IRQ\n"); > + device_init_wakeup(dev, false); > + } > + } There's nothing Rockchip-specific here, so I'm hoping you can explore putting this support in the PCI core, so any system that describes the WAKE# connection in the DT can benefit. > return 0; > } > > @@ -1123,10 +1135,6 @@ static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip) > return PTR_ERR(rockchip->clk_pcie_pm); > } > > - err = rockchip_pcie_setup_irq(rockchip); > - if (err) > - return err; > - > rockchip->vpcie12v = devm_regulator_get_optional(dev, "vpcie12v"); > if (IS_ERR(rockchip->vpcie12v)) { > if (PTR_ERR(rockchip->vpcie12v) == -EPROBE_DEFER) > @@ -1155,7 +1163,7 @@ static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip) > dev_info(dev, "no vpcie0v9 regulator found\n"); > } > > - return 0; > + return rockchip_pcie_setup_irq(rockchip); > } > > static int rockchip_pcie_set_vpcie(struct rockchip_pcie *rockchip) > @@ -1546,7 +1554,8 @@ static int rockchip_pcie_probe(struct platform_device *pdev) > > err = rockchip_pcie_enable_clocks(rockchip); > if (err) > - return err; > + /* Cleanup rockchip_pcie_parse_dt() */ > + goto err_disable_wake; > > err = rockchip_pcie_set_vpcie(rockchip); > if (err) { > @@ -1656,6 +1665,10 @@ static int rockchip_pcie_probe(struct platform_device *pdev) > regulator_disable(rockchip->vpcie0v9); > err_set_vpcie: > rockchip_pcie_disable_clocks(rockchip); > +err_disable_wake: > + /* It's harmless to disable wake even not enabled */ > + 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 > >
On Mon, Oct 16, 2017 at 03:03:50PM -0500, Bjorn Helgaas wrote: > On Sat, Oct 14, 2017 at 03:50:56AM +0800, 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 v6: > > Fix device_init_wake error handling, and add some comments. > > > > 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@chromium.com> > > > > drivers/pci/host/pcie-rockchip.c | 27 +++++++++++++++++++++------ > > 1 file changed, 21 insertions(+), 6 deletions(-) > > > > diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c > > index 9051c6c8fea4..268513b6c9c4 100644 > > --- a/drivers/pci/host/pcie-rockchip.c > > +++ b/drivers/pci/host/pcie-rockchip.c ... > > @@ -995,6 +996,17 @@ static int rockchip_pcie_setup_irq(struct rockchip_pcie *rockchip) > > return err; > > } > > > > + irq = platform_get_irq_byname(pdev, "wakeup"); > > + if (irq >= 0) { > > + /* Must init wakeup before setting dedicated wakeup irq. */ > > + device_init_wakeup(dev, true); > > + err = dev_pm_set_dedicated_wake_irq(dev, irq); > > + if (err) { > > + dev_err(dev, "failed to setup PCIe wakeup IRQ\n"); > > + device_init_wakeup(dev, false); > > + } > > + } > > There's nothing Rockchip-specific here, so I'm hoping you can explore > putting this support in the PCI core, so any system that describes the > WAKE# connection in the DT can benefit. I guess it could work to look into pci_create_root_bus(), and do something like the following? if (IS_ENABLED(CONFIG_OF) && parent && parent->of_node) ... do OF parsing for generic features like WAKE# ... Brian
On Tue, Oct 17, 2017 at 06:03:14PM -0700, Brian Norris wrote: > On Mon, Oct 16, 2017 at 03:03:50PM -0500, Bjorn Helgaas wrote: > > On Sat, Oct 14, 2017 at 03:50:56AM +0800, 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 v6: > > > Fix device_init_wake error handling, and add some comments. > > > > > > 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@chromium.com> > > > > > > drivers/pci/host/pcie-rockchip.c | 27 +++++++++++++++++++++------ > > > 1 file changed, 21 insertions(+), 6 deletions(-) > > > > > > diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c > > > index 9051c6c8fea4..268513b6c9c4 100644 > > > --- a/drivers/pci/host/pcie-rockchip.c > > > +++ b/drivers/pci/host/pcie-rockchip.c > ... > > > @@ -995,6 +996,17 @@ static int rockchip_pcie_setup_irq(struct rockchip_pcie *rockchip) > > > return err; > > > } > > > > > > + irq = platform_get_irq_byname(pdev, "wakeup"); > > > + if (irq >= 0) { > > > + /* Must init wakeup before setting dedicated wakeup irq. */ > > > + device_init_wakeup(dev, true); > > > + err = dev_pm_set_dedicated_wake_irq(dev, irq); > > > + if (err) { > > > + dev_err(dev, "failed to setup PCIe wakeup IRQ\n"); > > > + device_init_wakeup(dev, false); > > > + } > > > + } > > > > There's nothing Rockchip-specific here, so I'm hoping you can explore > > putting this support in the PCI core, so any system that describes the > > WAKE# connection in the DT can benefit. > > I guess it could work to look into pci_create_root_bus(), and > do something like the following? > > if (IS_ENABLED(CONFIG_OF) && parent && parent->of_node) > ... do OF parsing for generic features like WAKE# ... That's exactly the sort of thing I was thinking.
Hi guys, On 10/18/2017 09:29 PM, Bjorn Helgaas wrote: >> > >> >I guess it could work to look into pci_create_root_bus(), and >> >do something like the following? >> > >> > if (IS_ENABLED(CONFIG_OF) && parent && parent->of_node) >> > ... do OF parsing for generic features like WAKE# ... > That's exactly the sort of thing I was thinking. > i was looking at that too, but i'm not very clear about how to handle the platform_ops's set_wakeup...
diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c index 9051c6c8fea4..268513b6c9c4 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 +996,17 @@ static int rockchip_pcie_setup_irq(struct rockchip_pcie *rockchip) return err; } + irq = platform_get_irq_byname(pdev, "wakeup"); + if (irq >= 0) { + /* Must init wakeup before setting dedicated wakeup irq. */ + device_init_wakeup(dev, true); + err = dev_pm_set_dedicated_wake_irq(dev, irq); + if (err) { + dev_err(dev, "failed to setup PCIe wakeup IRQ\n"); + device_init_wakeup(dev, false); + } + } + return 0; } @@ -1123,10 +1135,6 @@ static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip) return PTR_ERR(rockchip->clk_pcie_pm); } - err = rockchip_pcie_setup_irq(rockchip); - if (err) - return err; - rockchip->vpcie12v = devm_regulator_get_optional(dev, "vpcie12v"); if (IS_ERR(rockchip->vpcie12v)) { if (PTR_ERR(rockchip->vpcie12v) == -EPROBE_DEFER) @@ -1155,7 +1163,7 @@ static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip) dev_info(dev, "no vpcie0v9 regulator found\n"); } - return 0; + return rockchip_pcie_setup_irq(rockchip); } static int rockchip_pcie_set_vpcie(struct rockchip_pcie *rockchip) @@ -1546,7 +1554,8 @@ static int rockchip_pcie_probe(struct platform_device *pdev) err = rockchip_pcie_enable_clocks(rockchip); if (err) - return err; + /* Cleanup rockchip_pcie_parse_dt() */ + goto err_disable_wake; err = rockchip_pcie_set_vpcie(rockchip); if (err) { @@ -1656,6 +1665,10 @@ static int rockchip_pcie_probe(struct platform_device *pdev) regulator_disable(rockchip->vpcie0v9); err_set_vpcie: rockchip_pcie_disable_clocks(rockchip); +err_disable_wake: + /* It's harmless to disable wake even not enabled */ + 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; }
Add support for PCIE_WAKE pin in rockchip pcie driver. Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com> --- Changes in v6: Fix device_init_wake error handling, and add some comments. 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@chromium.com> drivers/pci/host/pcie-rockchip.c | 27 +++++++++++++++++++++------ 1 file changed, 21 insertions(+), 6 deletions(-)