USB: EHCI: add no_io_watchdog platform_data parameter to ehci-platform

Enhance the ehci-platform driver to also accept no_io_watchdog as a platform
data parameter. When no_io_watchdog is set to 1, the ehci controller will set
ehci->need_io_watchdog to 0. Since most EHCI controllers do need the I/O
watchdog to be on, only let those which need it to turn the watchdog off.

Make sure that we change need_io_watchdog after the call to ehci_setup()
because ehci_setup() will unconditionnaly set need_io_watchdog to 1.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/usb/ehci_pdriver.h b/include/linux/usb/ehci_pdriver.h
index c9d09f8b7ff2..67ac74bde6d0 100644
--- a/include/linux/usb/ehci_pdriver.h
+++ b/include/linux/usb/ehci_pdriver.h
@@ -29,6 +29,8 @@
  *                      initialization.
  * @port_power_off:     set to 1 if the controller needs to be powered down
  *                      after initialization.
+ * @no_io_watchdog:     set to 1 if the controller does not need the I/O
+ *                      watchdog to run.
  *
  * These are general configuration options for the EHCI controller. All of
  * these options are activating more or less workarounds for some hardware.
@@ -41,6 +43,7 @@ struct usb_ehci_pdata {
         unsigned        big_endian_mmio:1;
         unsigned        port_power_on:1;
         unsigned        port_power_off:1;
+        unsigned        no_io_watchdog:1;
 
         /* Turn on all power and clocks */
         int (*power_on)(struct platform_device *pdev);