linux-toradex.git/drivers/usb/host/ohci-platform.c, branch v5.6-rc5

usb: Remove dev_err() usage after platform_get_irq()

2019-07-30T18:29:18+00:00

We don't need dev_err() messages when platform_get_irq() fails now that
platform_get_irq() prints an error message itself when something goes
wrong. Let's remove these prints with a simple semantic patch.

// 
@@
expression ret;
struct platform_device *E;
@@

ret =
(
platform_get_irq(E, ...)
|
platform_get_irq_byname(E, ...)
);

if ( \( ret < 0 \| ret <= 0 \) )
{
(
-if (ret != -EPROBE_DEFER)
-{ ...
-dev_err(...);
-... }
|
...
-dev_err(...);
)
...
}
// 

While we're here, remove braces on if statements that only have one
statement (manually).

Signed-off-by: Stephen Boyd 
Link: https://lore.kernel.org/r/20190730181557.90391-47-swboyd@chromium.org
Signed-off-by: Greg Kroah-Hartman

usb: host: ohci-platform: remove custom USB PHY handling

2018-03-09T17:43:53+00:00

The new PHY wrapper is now wired up in the core HCD code. This means
that PHYs are now controlled (initialized, enabled, disabled, exited)
without requiring any host-driver specific code.
Remove the custom USB PHY handling from the ohci-platform driver as the
core HCD code now handles this.

Signed-off-by: Martin Blumenstingl 
Acked-by: Alan Stern 
Tested-by: Neil Armstrong 
Signed-off-by: Greg Kroah-Hartman

usb: add a flag to skip PHY initialization to struct usb_hcd

2018-03-09T17:43:52+00:00

The USB HCD core driver parses the device-tree node for "phys" and
"usb-phys" properties. It also manages the power state of these PHYs
automatically.
However, drivers may opt-out of this behavior by setting "phy" or
"usb_phy" in struct usb_hcd to a non-null value. An example where this
is required is the "Qualcomm USB2 controller", implemented by the
chipidea driver. The hardware requires that the PHY is only powered on
after the "reset completed" event from the controller is received.

A follow-up patch will allow the USB HCD core driver to manage more than
one PHY. Add a new "skip_phy_initialization" bitflag to struct usb_hcd
so drivers can opt-out of any PHY management provided by the USB HCD
core driver.

This also updates the existing drivers so they use the new flag if they
want to opt out of the PHY management provided by the USB HCD core
driver. This means that for these drivers the new "multiple PHY"
handling (which will be added in a follow-up patch) will be disabled as
well.

Signed-off-by: Martin Blumenstingl 
Acked-by: Peter Chen 
Tested-by: Neil Armstrong 
Signed-off-by: Greg Kroah-Hartman

USB: host: ohci: Remove redundant license text

2017-11-07T14:45:02+00:00

Now that the SPDX tag is in all USB files, that identifies the license
in a specific and legally-defined manner.  So the extra GPL text wording
can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text.  And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Acked-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: add SPDX identifiers to all remaining files in drivers/usb/

2017-11-04T10:48:02+00:00

It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.

Update the drivers/usb/ and include/linux/usb* files with the correct
SPDX license identifier based on the license text in the file itself.
The SPDX identifier is a legally binding shorthand, which can be used
instead of the full boiler plate text.

This work is based on a script and data from Thomas Gleixner, Philippe
Ombredanne, and Kate Stewart.

Cc: Thomas Gleixner 
Cc: Kate Stewart 
Cc: Philippe Ombredanne 
Signed-off-by: Greg Kroah-Hartman 
Acked-by: Felipe Balbi 
Acked-by: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman

usb: ohci-platform: use reset array API

2017-11-01T17:22:26+00:00

Generic drivers like this need to control arbitrary number of reset
lines.  Instead of hard-coding the maximum number of resets, use the
reset array API.  It can manage a bunch of resets behind the scene.

Signed-off-by: Masahiro Yamada 
Acked-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

usb: host: ohci-platform: Add support for omap3 and later

2017-06-03T09:08:04+00:00

With the runtime PM implemented for ohci-platform driver, we can
now support omap3 and later OHCI by adding one device tree
property.

Cc: Hans de Goede 
Cc: Rob Herring 
Cc: Yoshihiro Shimoda 
Cc: Sebastian Reichel 
Acked-by: Alan Stern 
Acked-by: Roger Quadros 
Signed-off-by: Tony Lindgren 
Signed-off-by: Greg Kroah-Hartman

usb: host: ohci-platform: Add basic runtime PM support

2017-06-03T09:08:04+00:00

This is needed in preparation of adding support for omap3 and
later OHCI. The runtime PM will only do something on platforms
that implement it.

Cc: devicetree@vger.kernel.org
Cc: Hans de Goede 
Cc: Rob Herring 
Cc: Sebastian Reichel 
Cc: Yoshihiro Shimoda 
Signed-off-by: Tony Lindgren 
Acked-by: Roger Quadros 
Acked-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

usb: host: ohci-platform: set hcd->phy to avoid phy_get() in usb_add_hcd()

2017-03-17T04:35:25+00:00

This patch sets hcd->phy from own phy context to avoid phy_get()
in usb_add_hcd(). Since core/hcd.c manages the phy only in
usb_add_hcd() and usb_remove_hcd(), there is difficult to manage
the phy in suspend/resume.

Signed-off-by: Yoshihiro Shimoda 
Acked-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

ohci-platform: Add support for controllers with multiple reset lines

2016-06-08T05:21:41+00:00

At least the EHCI/OHCI found on the Allwinnner H3 SoC needs multiple
reset lines, the controller will not initialize while the reset for
its companion is still asserted, which means we need to de-assert
2 resets for the controller to work.

Signed-off-by: Hans de Goede 
Signed-off-by: Greg Kroah-Hartman