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Subject[PATCH v5 1/3] PCI: rockchip: Add support for pcie wake irq
Date
Add support for PCIE_WAKE pin in rockchip pcie driver.

Signed-off-by: Jeffy Chen <jeffy.chen@rock-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@chromium.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);
+ 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

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