[PATCH] PCI: rockchip: control vpcie0v9 for system PM

[Shawn Lin]

vpcie0v9 is used for PHY, so we could disable it as
we don't need PHY to work then in S3 if folks assign it
DT. But we should note that there is a side effect that
we could not support beacon wakeup if we disable vpcie0v9
for aggressive power-saving.

Cc: Brian Norris <briannorris at chromium.org>
Cc: Jeffy Chen <jeffy.chen at rock-chips.com>
Signed-off-by: Shawn Lin <shawn.lin at rock-chips.com>
---

 drivers/pci/host/pcie-rockchip.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c
index 0e020b6..c8ca796 100644
--- a/drivers/pci/host/pcie-rockchip.c
+++ b/drivers/pci/host/pcie-rockchip.c
@@ -1251,6 +1251,9 @@ static int __maybe_unused rockchip_pcie_suspend_noirq(struct device *dev)
 	clk_disable_unprepare(rockchip->aclk_perf_pcie);
 	clk_disable_unprepare(rockchip->aclk_pcie);
 
+	if (!IS_ERR(rockchip->vpcie0v9))
+		regulator_disable(rockchip->vpcie0v9);
+
 	return ret;
 }
 
@@ -1259,6 +1262,14 @@ static int __maybe_unused rockchip_pcie_resume_noirq(struct device *dev)
 	struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
 	int err;
 
+	if (!IS_ERR(rockchip->vpcie0v9)) {
+		err = regulator_enable(rockchip->vpcie0v9);
+		if (err) {
+			dev_err(dev, "fail to enable vpcie0v9 regulator\n");
+			return err;
+		}
+	}
+
 	clk_prepare_enable(rockchip->clk_pcie_pm);
 	clk_prepare_enable(rockchip->hclk_pcie);
 	clk_prepare_enable(rockchip->aclk_perf_pcie);
-- 
1.9.1