ENGR00314570-2 pcie:add pcie power control on imx6sx

imx6sx pcie has standalone ldo domain, add the power
control routines.
- pcie pm recovery works when imx6sx pcie is used as rc.
- pcie pm recovery works on both rc and ep modes.
- l2 mode had been validated on imx6sx sdb(rc) and
e1000e (ep) environment.
- fastmix and megamix can be turn off and turn on, during
system suspend/resume.

- hw:
  - imx6sx sdb board.
  - intel e1000e nic
  - xhci pcie2usb device

Signed-off-by: Richard Zhu <r65037@freescale.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig
index 120714876e83..0512d1021a4f 100644
--- a/drivers/pci/host/Kconfig
+++ b/drivers/pci/host/Kconfig
@@ -20,6 +20,10 @@ config PCI_IMX6
         select PCIEPORTBUS
         select PCIE_DW
 
+config PCI_IMX6SX_EXTREMELY_PWR_SAVE
+        bool "Freescale i.MX6SX PCIe controller extremely power save mode"
+        depends on PCI_IMX6
+
 config EP_MODE_IN_EP_RC_SYS
         bool "PCI Express EP mode in the IMX6 RC/EP interconnection system"
         depends on PCI_IMX6