Three compatible strings have been added to the at91_udc driver.
Update the documentation accordingly.
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

The at91_udc driver request 2 clocks, and thus need them to be defined in
the device tree.
Document the clocks and clock-names properties so that everybody use the
correct names.
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

at91sam9rl SoC has an erratum forcing us to toggle the BIAS on USB
suspend/resume events.

This specific handling is only activated when CONFIG_ARCH_AT91SAM9RL is
set and this option is only set when building a non-DT kernel, which is
problematic since non-DT support for at91sam9rl SoC has been removed.

Rework the toggle_bias implementation to attach it to the "at91sam9rl-udc"
compatible string.

Add new compatible strings to avoid executing at91sam9rl erratum handling
on other SoCs.
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

atmel,at91sam9rl-udc is a USB gadget, it has no means to control vbus.
atmel,vbus-gpio is in fact used to detect the presence of vbus.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
[nicolas.ferre@atmel.com: modify the commit message]
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Allow to compile the driver all the time if AT91 enabled.
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NFelipe Balbi <balbi@ti.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: NBo Shen <voice.shen@atmel.com>

Allow to compile it if AT91 is enable.
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>