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[0/4] cpufreq: Add basic cpufreq scaling for Qualcomm MSM8909

Message ID 20230912-msm8909-cpufreq-v1-0-767ce66b544b@kernkonzept.com
Headers show
Series cpufreq: Add basic cpufreq scaling for Qualcomm MSM8909 | expand

Message

Stephan Gerhold Sept. 12, 2023, 9:40 a.m. UTC 
Add the necessary definitions to the qcom-cpufreq-nvmem driver to
support basic cpufreq scaling on the Qualcomm MSM8909 SoC. In practice
the necessary power domains vary depending on the actual PMIC the SoC
was combined with. With PM8909 the VDD_APC power domain is shared with
VDD_CX so the RPM firmware handles all voltage adjustments, while with
PM8916 and PM660 Linux is responsible to do adaptive voltage scaling
of a dedicated CPU regulator using CPR.

Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
---
Stephan Gerhold (4):
      cpufreq: qcom-nvmem: Enable virtual power domain devices
      cpufreq: dt: platdev: Add MSM8909 to blocklist
      dt-bindings: cpufreq: qcom-nvmem: Document MSM8909
      cpufreq: qcom-nvmem: Add MSM8909

 .../bindings/cpufreq/qcom-cpufreq-nvmem.yaml       |  1 +
 drivers/cpufreq/cpufreq-dt-platdev.c               |  1 +
 drivers/cpufreq/qcom-cpufreq-nvmem.c               | 47 +++++++++++++++++++++-
 3 files changed, 48 insertions(+), 1 deletion(-)
---
base-commit: 0bb80ecc33a8fb5a682236443c1e740d5c917d1d
change-id: 20230906-msm8909-cpufreq-dff238de9ff3

Best regards,

Comments

Konrad Dybcio Sept. 12, 2023, 9:53 a.m. UTC | #1 
On 12.09.2023 11:40, Stephan Gerhold wrote:
> MSM8909 uses qcom-cpufreq-nvmem to attach power domains and to parse the
> speedbin from NVMEM (for opp-supported-hw).
> 
> Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>

Konrad
Rob Herring Sept. 12, 2023, 6:29 p.m. UTC | #2 
On Tue, 12 Sep 2023 11:40:17 +0200, Stephan Gerhold wrote:
> Document that MSM8909 is used with qcom-cpufreq-nvmem for voltage
> scaling and to restrict the maximum frequency based on the speedbin
> encoded in the nvmem cells.
> 
> Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
> ---
>  Documentation/devicetree/bindings/cpufreq/qcom-cpufreq-nvmem.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 

Acked-by: Rob Herring <robh@kernel.org>
Viresh Kumar Sept. 28, 2023, 6:54 a.m. UTC | #3 
On 12-09-23, 13:29, Rob Herring wrote:
> 
> On Tue, 12 Sep 2023 11:40:17 +0200, Stephan Gerhold wrote:
> > Document that MSM8909 is used with qcom-cpufreq-nvmem for voltage
> > scaling and to restrict the maximum frequency based on the speedbin
> > encoded in the nvmem cells.
> > 
> > Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
> > ---
> >  Documentation/devicetree/bindings/cpufreq/qcom-cpufreq-nvmem.yaml | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> 
> Acked-by: Rob Herring <robh@kernel.org>

Applied. Thanks.