]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
USB: tegra: Add resets & has-utmi-pad-registers flag to the PHY binding
authorTuomas Tynkkynen <ttynkkynen@nvidia.com>
Fri, 4 Jul 2014 01:09:36 +0000 (04:09 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 9 Jul 2014 23:25:46 +0000 (16:25 -0700)
commit883df42abff97b4791c7bc466226b878a828ecc5
tree10afcc07d1b2f995a251d68c78aa2017af2b6311
parent91c72df1fc978b081224b2058067e2f5adc7143e
USB: tegra: Add resets & has-utmi-pad-registers flag to the PHY binding

When Tegra was converted to use the standard reset bindings, the PHY was
forgotten, probably because all the resetting of the USB blocks were
done in the EHCI driver. What also went unnoticed is that resetting the
1st on-chip USB module also wipes some of the UTMI pad configuration
registers that are also used by the other USB blocks. So this fact needs
to be described in the device tree, and the driver modified not to reset
the 1st module at inappropriate times.

In order to stay compatible with old device trees, the USB drivers will
still function without these properties but with the old,
potentially buggy behaviour.

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Documentation/devicetree/bindings/usb/nvidia,tegra20-usb-phy.txt