[PATCH v4 0/7] Add AVS support for J721S2

[Manorit Chawdhry]

Hi Simon,

On 09:23-20241007, Simon Glass wrote:
> Hi Manorit,
> 
> On Fri, 4 Oct 2024 at 00:24, Manorit Chawdhry <m-chawdhry at ti.com> wrote:
> >
> > This series adds support for AVS on J721S2.
> 
> What is AVS? You should write an abbreviation out in full at least
> once in the series.

Totally missed this part, let me take that up in the next revision!

But basically it is Adaptive voltage scaling. This allows us to run
our CPU with the optimal voltage for that particular silicon which would
have been written in efuse during manufacturing itself. This helps in
saving power during runtime [0]

[0]: https://www.ti.com/lit/pdf/spruj28 (Section 5.2.4.1 AVS Support)

Regards,
Manorit

> 
> >
> > AVS Test for J721S2: https://gist.github.com/manorit2001/b2fd9f6764a863294d4aa0755c83c84f
> > Boot Test results: https://gist.github.com/manorit2001/15e45f6c421aeeb93effde023a537762
> >
> > Signed-off-by: Manorit Chawdhry <m-chawdhry at ti.com>
> > ---
> > Changes in v4:
> >
> > * Udit
> > - Use the compatible for finding the node rather than alias.
> > - Remove debug print
> > - Add ret value in error prints
> >
> > - Link to v3: https://lore.kernel.org/r/20240813-b4-upstream-j721s2-avs-v3-0-5115d93cdeb2@ti.com
> >
> > ---
> > Manorit Chawdhry (7):
> >       power: pmic: tps65941: Add DM_PMIC dependency
> >       drivers: misc: k3_avs: Check return code while programming AVS
> >       arm: dts: k3-j7*-r5: Add MPU clock in clocks property
> >       drivers: misc: k3_avs: Extract MPU clk and dev ID from DT
> >       arm: mach-k3: j721s2_init: Initialize AVS Class 0
> >       arm: dts: j721s2: Add VTM node in R5
> >       configs: j721s2_evm_r5_defconfig: Add AVS Configs
> >
> >  arch/arm/dts/k3-am69-r5-sk.dts                  |  3 +-
> >  arch/arm/dts/k3-j7200-r5-common-proc-board.dts  |  3 +-
> >  arch/arm/dts/k3-j721e-r5.dtsi                   |  3 +-
> >  arch/arm/dts/k3-j721s2-r5-common-proc-board.dts |  9 ++++++
> >  arch/arm/dts/k3-j721s2-r5.dtsi                  |  3 +-
> >  arch/arm/dts/k3-j784s4-r5-evm.dts               |  3 +-
> >  arch/arm/mach-k3/j721s2/j721s2_init.c           | 10 +++++++
> >  configs/am68_sk_r5_defconfig                    |  4 +++
> >  configs/j721s2_evm_r5_defconfig                 |  6 ++++
> >  drivers/misc/k3_avs.c                           | 40 ++++++++++++++++++++++++-
> >  drivers/power/pmic/Kconfig                      |  1 +
> >  11 files changed, 79 insertions(+), 6 deletions(-)
> > ---
> > base-commit: 3a0b829efc35227b1079a444f00e0729502197ad
> > change-id: 20240130-b4-upstream-j721s2-avs-8c187d3fe26a
> >
> > Best regards,
> > --
> > Manorit Chawdhry <m-chawdhry at ti.com>
> >
> 
> Regards,
> Simon