Hi Simon,
On 09:23-20241007, Simon Glass wrote:
Hi Manorit,
On Fri, 4 Oct 2024 at 00:24, Manorit Chawdhry m-chawdhry@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@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@...
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@ti.com
Regards, Simon