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

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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>
This commit is contained in:
Florian Fainelli 2012-10-08 15:11:21 +02:00 committed by Greg Kroah-Hartman
parent 6d39944ee8
commit 4534874a87
2 changed files with 5 additions and 0 deletions
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2
drivers/usb/host/ehci-platform.c
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@ -38,6 +38,8 @@ static int ehci_platform_reset(struct usb_hcd *hcd)
if (retval)
return retval;
if (pdata->no_io_watchdog)
ehci->need_io_watchdog = 0;
if (pdata->port_power_on)
ehci_port_power(ehci, 1);
if (pdata->port_power_off)

3
include/linux/usb/ehci_pdriver.h
View File

@ -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);