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From 4cfecad11f7a6cebb77a37b7bbd42d7f910cce80 Mon Sep 17 00:00:00 2001
From: Miquel Raynal <miquel.raynal@bootlin.com>
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 <miquel.raynal@bootlin.com>
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
---
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
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