[PATCH v4 2/4] PCI: rockchip: Add support for pcie wake irq
From: Jeffy Chen <hidden>
Date: 2017-08-22 03:20:19
Also in:
linux-pci, linux-rockchip, lkml
Subsystem:
arm/rockchip soc support, pci subsystem, the rest · Maintainers:
Heiko Stuebner, Bjorn Helgaas, Linus Torvalds
Add support for PCIE_WAKE pin in rockchip pcie driver.
Signed-off-by: Jeffy Chen <redacted>
---
Changes in v4: None
Changes in v3:
Fix error handling
Changes in v2:
Use dev_pm_set_dedicated_wake_irq
-- Suggested by Brian Norris [off-list ref]
drivers/pci/host/pcie-rockchip.c | 21 +++++++++++++++++++--
1 file changed, 19 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c
index 5d85ec2e2fb0..a0f7267984da 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>
@@ -1111,6 +1112,15 @@ static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip) return err; } + /* Must init wakeup before setting dedicated wake irq. */ + 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->vpcie12v = devm_regulator_get_optional(dev, "vpcie12v"); if (IS_ERR(rockchip->vpcie12v)) { if (PTR_ERR(rockchip->vpcie12v) == -EPROBE_DEFER)
@@ -1493,12 +1503,13 @@ static int rockchip_pcie_probe(struct platform_device *pdev) err = rockchip_pcie_parse_dt(rockchip); if (err) - return err; + /* It's safe to disable wake even not enabled */ + goto err_disable_wake; err = clk_prepare_enable(rockchip->aclk_pcie); if (err) { dev_err(dev, "unable to enable aclk_pcie clock\n"); - return err; + goto err_disable_wake; } err = clk_prepare_enable(rockchip->aclk_perf_pcie);
@@ -1633,6 +1644,9 @@ static int rockchip_pcie_probe(struct platform_device *pdev) clk_disable_unprepare(rockchip->aclk_perf_pcie); err_disable_aclk_pcie: clk_disable_unprepare(rockchip->aclk_pcie); +err_disable_wake: + dev_pm_clear_wake_irq(dev); + device_init_wakeup(dev, false); return err; }
@@ -1662,6 +1676,9 @@ static int rockchip_pcie_remove(struct platform_device *pdev) if (!IS_ERR(rockchip->vpcie12v)) regulator_disable(rockchip->vpcie12v); + dev_pm_clear_wake_irq(dev); + device_init_wakeup(dev, false); + return 0; }
--
2.11.0