msm: pcie: switch GPIO to sleep state before asserting PERST

Before asserting PERST, PCIe bus driver should switch GPIO to
sleep state. This will prevent host from missing any events after
the link is off.

Change-Id: Ie57d339da02dde6cbb3c41d2be52ee0602227193
Signed-off-by: Tony Truong <truong@codeaurora.org>

diff --git a/drivers/pci/host/pci-msm.c b/drivers/pci/host/pci-msm.c
index 9dc678c..93caf75 100644 (file)
--- a/drivers/pci/host/pci-msm.c
+++ b/drivers/pci/host/pci-msm.c
@@ -6742,12 +6742,12 @@ static int msm_pcie_pm_suspend(struct pci_dev *dev,
                PCIE_DBG(pcie_dev, "RC%d: PM_Enter_L23 is NOT received\n",
                        pcie_dev->rc_idx);
 
-               msm_pcie_disable(pcie_dev, PM_PIPE_CLK | PM_CLK | PM_VREG);
-
        if (pcie_dev->use_pinctrl && pcie_dev->pins_sleep)
                pinctrl_select_state(pcie_dev->pinctrl,
                                        pcie_dev->pins_sleep);
 
+       msm_pcie_disable(pcie_dev, PM_PIPE_CLK | PM_CLK | PM_VREG);
+
        PCIE_DBG(pcie_dev, "RC%d: exit\n", pcie_dev->rc_idx);
 
        return ret;