drivers: pci: Support system pm no irq ops.

Because of the limitation of hardware design, only enable/disable clk here.

Signed-off-by: Kevin.xie <kevin.xie@starfivetech.com>

diff --git a/drivers/pci/controller/pcie-plda.c b/drivers/pci/controller/pcie-plda.c
index 213808ed958c086863893e9a336db3255d433282..cde8f7bc6155e429bd7b42a4642a5bf58b93dcca 100644 (file)
--- a/drivers/pci/controller/pcie-plda.c
+++ b/drivers/pci/controller/pcie-plda.c
@@ -990,6 +990,40 @@ static int plda_pcie_remove(struct platform_device *pdev)
        return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+static int __maybe_unused plda_pcie_suspend_noirq(struct device *dev)
+{
+       struct plda_pcie *pcie = dev_get_drvdata(dev);
+
+       if (!pcie)
+               return 0;
+
+       clk_bulk_disable_unprepare(pcie->num_clks, pcie->clks);
+
+       return 0;
+}
+
+static int __maybe_unused plda_pcie_resume_noirq(struct device *dev)
+{
+       struct plda_pcie *pcie = dev_get_drvdata(dev);
+       int ret;
+
+       if (!pcie)
+               return 0;
+
+       ret = clk_bulk_prepare_enable(pcie->num_clks, pcie->clks);
+       if (ret)
+               dev_err(dev, "Failed to enable clocks\n");
+
+       return ret;
+}
+
+static const struct dev_pm_ops plda_pcie_pm_ops = {
+       SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(plda_pcie_suspend_noirq,
+                                     plda_pcie_resume_noirq)
+};
+#endif
+
 static const struct of_device_id plda_pcie_of_match[] = {
        { .compatible = "plda,pci-xpressrich3-axi"},
        { .compatible = "starfive,jh7110-pcie"},
@@ -1001,6 +1035,9 @@ static struct platform_driver plda_pcie_driver = {
        .driver = {
                .name = KBUILD_MODNAME,
                .of_match_table = of_match_ptr(plda_pcie_of_match),
+#ifdef CONFIG_PM_SLEEP
+               .pm = &plda_pcie_pm_ops,
+#endif
        },
        .probe = plda_pcie_probe,
        .remove = plda_pcie_remove,