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@xxxxxxxxxxx>
---
Changes in v4:
- rebased against greg's latest usb-next
Changes in v3:
- set need_io_watchdog after the call to ehci_setup()
Changes in v2:
- reworked patch to introduce "no_io_watchdog" instead of "need_io_watchdog"
- reworded commit message accordingly
drivers/usb/host/ehci-platform.c | 2 ++
include/linux/usb/ehci_pdriver.h | 3 +++
2 files changed, 5 insertions(+)
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index 764e010..607adf9 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -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)
diff --git a/include/linux/usb/ehci_pdriver.h b/include/linux/usb/ehci_pdriver.h
index c9d09f8..67ac74b 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);
--
1.7.9.5
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