[PATCH v1] arm64: dts: rockchip: remove vdd_log from rk3399-puma

Heiko Stuebner heiko at sntech.de
Tue Dec 5 15:50:19 PST 2017

Am Dienstag, 5. Dezember 2017, 08:11:58 CET schrieb Klaus Goger:
> vdd_log has no consumer and therefore will not be set to a specific
> voltage. Still the PWM output pin gets configured and thence the vdd_log
> output voltage will changed from it's default. Depending on the idle
> state of the PWM this will slightly over or undervoltage the logic supply
> of the RK3399 and cause instability with GbE (undervoltage) and PCIe
> (overvoltage). Since the default value set by a voltage divider is the
> correct supply voltage and we don't need to change it during runtime we
> remove the rail from the devicetree completely so the PWM pin will not
> be configured.
> Signed-off-by: Klaus Goger <klaus.goger at theobroma-systems.com>

applied as fix for 4.15


More information about the Linux-rockchip mailing list