| Message ID | 20190525190204.7897-1-martin.blumenstingl@googlemail.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | ARM: dts: meson8b: add VDDEE / mali-supply | expand |
Martin Blumenstingl <martin.blumenstingl@googlemail.com> writes: > 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] Just FYI... unless I hear otherwise, I'll wait for the PWM cleanups to land before queuing this series. Kevin
On Wed, Jun 12, 2019 at 1:32 AM Kevin Hilman <khilman@baylibre.com> wrote: > > Martin Blumenstingl <martin.blumenstingl@googlemail.com> writes: > > > 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] > > Just FYI... unless I hear otherwise, I'll wait for the PWM cleanups to > land before queuing this series. I'm happy with that because I'm not sure what will happen *without* the PWM improvements Martin
Martin Blumenstingl <martin.blumenstingl@googlemail.com> writes: > On Wed, Jun 12, 2019 at 1:32 AM Kevin Hilman <khilman@baylibre.com> wrote: >> >> Martin Blumenstingl <martin.blumenstingl@googlemail.com> writes: >> >> > 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] >> >> Just FYI... unless I hear otherwise, I'll wait for the PWM cleanups to >> land before queuing this series. > > I'm happy with that because I'm not sure what will happen *without* > the PWM improvements OK, then I'll rely on you to ping (or resend) on this series to remind me when the PWM stuff has landed. Thanks, Kevin