EC-100 and Odroid-C1 use a "copy" of the VCCK regulator as "VDDEE" regulator. VDDEE supplies the Mali GPU and various other bits within the SoC.
The VDDEE regulator is not exclusive to the Mali GPU so it must not change it's voltage. The GPU OPP table has a fixed voltage for all frequencies of 1.10V. This matches with what u-boot sets on my EC-100 and Odroid-C1. Dependencies: - compile time: patch #4 depends on my other patch "ARM: meson8b-mxq: better support for the TRONFY MXQ" from [0] - runtime: we don't want the kernel to change the output of the VDDEE regulator to the maximum value. Thus the PWM driver has to be able to read the PWM period and duty cycle from u-boot. This is supported with my series called "pwm-meson: cleanups and improvements" from [1] [0] https://patchwork.kernel.org/patch/10960283/ [1] https://patchwork.kernel.org/cover/10961073/ Martin Blumenstingl (4): ARM: dts: meson8b: add the PWM_D output pin ARM: dts: meson8b: ec100: add the VDDEE regulator ARM: dts: meson8b: odroidc1: add the VDDEE regulator ARM: dts: meson8b: mxq: add the VDDEE regulator arch/arm/boot/dts/meson8b-ec100.dts | 31 +++++++++++++++++++++++--- arch/arm/boot/dts/meson8b-mxq.dts | 26 ++++++++++++++++++--- arch/arm/boot/dts/meson8b-odroidc1.dts | 27 +++++++++++++++++++--- arch/arm/boot/dts/meson8b.dtsi | 8 +++++++ 4 files changed, 83 insertions(+), 9 deletions(-) -- 2.21.0
