Searched hist:"6 f07176fc36c0ad51877a07c99bb04f29d96aced" (Results 1 – 2 of 2) sorted by relevance
| /openbmc/linux/arch/arm64/boot/dts/rockchip/ |
| H A D | rk3399-gru-kevin.dts | diff 6f07176fc36c0ad51877a07c99bb04f29d96aced Fri Jun 23 12:07:36 CDT 2017 Matthias Kaehlcke <mka@chromium.org> arm64: dts: rockchip: Use vctrl regulators for dynamic CPU voltages on Gru/Kevin
The Gru device tree currently contains entries for the regulators
ppvar_bigcpu, ppvar_litcpu, ppvar_gpu and ppvar_centerlogic; however,
the regulators have not been enabled, due to the lack of binding and driver
support for keeping the over-voltage protection (OVP) at bay and
preventing unintended regulator shutdowns on voltage downshifts.
Now, the vctrl regulator driver has been merged, along with new bindings
for asymmetric settling time. The driver is OVP aware, it splits larger
voltage decreases in multiple steps when necessary and adds required
delays.
This change renames each of the aforementioned regulators to
<orig_name>_pwm and adds a new vctrl regulator named <orig_name>.
The vctrl regulators use the voltage of their corresponding PWM regulator
as control voltage. The OVP related values are empirical and stem from
the Chrome OS kernel tree.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Brian Norris <briannorris@chromium.org>
[fixed node names and parent supplies of gpu and centerlogic]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
|
| H A D | rk3399-gru.dtsi | diff 6f07176fc36c0ad51877a07c99bb04f29d96aced Fri Jun 23 12:07:36 CDT 2017 Matthias Kaehlcke <mka@chromium.org> arm64: dts: rockchip: Use vctrl regulators for dynamic CPU voltages on Gru/Kevin
The Gru device tree currently contains entries for the regulators
ppvar_bigcpu, ppvar_litcpu, ppvar_gpu and ppvar_centerlogic; however,
the regulators have not been enabled, due to the lack of binding and driver
support for keeping the over-voltage protection (OVP) at bay and
preventing unintended regulator shutdowns on voltage downshifts.
Now, the vctrl regulator driver has been merged, along with new bindings
for asymmetric settling time. The driver is OVP aware, it splits larger
voltage decreases in multiple steps when necessary and adds required
delays.
This change renames each of the aforementioned regulators to
<orig_name>_pwm and adds a new vctrl regulator named <orig_name>.
The vctrl regulators use the voltage of their corresponding PWM regulator
as control voltage. The OVP related values are empirical and stem from
the Chrome OS kernel tree.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Brian Norris <briannorris@chromium.org>
[fixed node names and parent supplies of gpu and centerlogic]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
|