tree ad7b45005d8dff980d5296a740f11bd933335211
parent ae91a799fb3cbc6e07718da97b40eb75f782dbaf
author Chen-Yu Tsai <wens@csie.org> 1516353941 +0800
committer Kishon Vijay Abraham I <kishon@ti.com> 1520847741 +0530

phy: allwinner: sun4i-usb: poll vbus changes on A23/A33 when driving VBUS

The AXP223 PMIC, like the AXP221, does not generate VBUS change
interrupts when N_VBUSEN is used to drive VBUS for the OTG port
on the board.

This was not noticed until recently, as most A23/A33 boards use
a GPIO pin that does not support interrupts for OTG ID detection.
This forces the driver to use polling. However the A33-OlinuXino
uses a pin that does support interrupts, so the driver uses them.
However the VBUS interrupt never fires, and the driver never gets
to update the VBUS status. This results in musb timing out waiting
for VBUS to rise.

This was worked around for the AXP221 by resorting to polling
changes in commit 91d96f06a760 ("phy-sun4i-usb: Add workaround for
missing Vbus det interrupts on A31"). This patch adds the A23 and
A33 to the list of SoCs that need the workaround.

Fixes: fc1f45ed3043 ("phy-sun4i-usb: Add support for the usb-phys on the
		      sun8i-a33 SoC")
Fixes: 123dfdbcfaf5 ("phy-sun4i-usb: Add support for the usb-phys on the
		      sun8i-a23 SoC")
Cc: <stable@vger.kernel.org> # 4.3.x: 68dbc2ce77bb phy-sun4i-usb:
		Use of_match_node to get model specific config data
Cc: <stable@vger.kernel.org> # 4.3.x: 5cf700ac9d50 phy: phy-sun4i-usb:
		Fix optional gpios failing probe
Cc: <stable@vger.kernel.org> # 4.3.x: 04e59a0211ff phy-sun4i-usb:
		Fix irq free conditions to match request conditions
Cc: <stable@vger.kernel.org> # 4.3.x: 91d96f06a760 phy-sun4i-usb:
		Add workaround for missing Vbus det interrupts on A31
Cc: <stable@vger.kernel.org> # 4.3.x
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>