From 4cfecad11f7a6cebb77a37b7bbd42d7f910cce80 Mon Sep 17 00:00:00 2001 From: Miquel Raynal Date: Wed, 31 Aug 2022 16:07:27 +0200 Subject: [PATCH 9/9] PCI: aardvark: Add suspend to RAM support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add suspend and resume callbacks. We need to use the NOIRQ variants to ensure the controller's IRQ handlers are not run during suspend() / resume(), which could cause races. Signed-off-by: Miquel Raynal Signed-off-by: Pali Rohár Signed-off-by: Marek Behún --- drivers/pci/controller/pci-aardvark.c | 34 +++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index 17aed65aab91..f3984bdf1d96 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -1911,6 +1911,39 @@ static int advk_pcie_setup_phy(struct advk_pcie *pcie) return ret; } +static int advk_pcie_suspend(struct device *dev) +{ + struct advk_pcie *pcie = dev_get_drvdata(dev); + + advk_pcie_disable_phy(pcie); + + clk_disable_unprepare(pcie->clk); + + return 0; +} + +static int advk_pcie_resume(struct device *dev) +{ + struct advk_pcie *pcie = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(pcie->clk); + if (ret) + return ret; + + ret = advk_pcie_enable_phy(pcie); + if (ret) + return ret; + + advk_pcie_setup_hw(pcie); + + return 0; +} + +static const struct dev_pm_ops advk_pcie_dev_pm_ops = { + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(advk_pcie_suspend, advk_pcie_resume) +}; + static int advk_pcie_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -2188,6 +2221,7 @@ static struct platform_driver advk_pcie_driver = { .driver = { .name = "advk-pcie", .of_match_table = advk_pcie_of_match_table, + .pm = &advk_pcie_dev_pm_ops, }, .probe = advk_pcie_probe, .remove = advk_pcie_remove, -- 2.34.1