[V4,0/5] qcom: x1e80100: Enable CPUFreq

Message

Sibi Sankar April 22, 2024, 4:40 p.m. UTC

This series enables CPUFreq support on the X1E SoC using the SCMI perf
protocol. This was originally part of the RFC: firmware: arm_scmi:
Qualcomm Vendor Protocol [1]. I've split it up so that this part can
land earlier.

V3:
* Fix Maintainer info in cpucp mbox bindings. [Bjorn]
* Fix copyright info in cpucp driver. [Bjorn]
* Drop unused APSS_CPUCP_TX_MBOX_IDR, value init and drv_data. [Bjorn/Dmitry]
* Convert to lower case hex. [Bjorn]
* Convert irq and dev to local variables. [Bjorn]
* Replace for and if with for_each_set_bit. [Bjorn]
* Document the need for spinlock. [Bjorn]
* Add space after " for aesthetics. [Bjorn]
* Fix err in calc and add fixes tag. [Bjorn]
* Include io.h and re-order platform_device.h
* Use GENMASK_ULL to generate APSS_CPUCP_RX_MBOX_CMD_MASK.

V2:
* Fix series version number [Rob]
* Pickup Rbs from Dimitry and Rob.
* Use power-domain instead of clocks. [Sudeep/Ulf]
* Rename sram sub-nodes according to schema. [Dmitry]
* Use BIT() instead of manual shift. [Dmitry]
* Define RX_MBOX_CMD to account for chan calculation. [Dmitry]
* Clear the bit instead of the entire status within the spinlock. [Dmitry]
* Use dev_err_probe instead. [Dmitry]
* Drop superfluous error message while handling errors from get_irq. [Dmitry]
* Use devm_mbox_controller_register and drop remove path. [Dmitry]
* Define TX_MBOX_CMD to account for chan calculation.
* Use cpucp->dev in probe path for conformity.

RFC V1:
* Use x1e80100 as the fallback for future SoCs using the cpucp-mbox
  controller. [Krzysztoff/Konrad/Rob]
* Use chan->lock and chan->cl to detect if the channel is no longer
  Available. [Dmitry]
* Use BIT() instead of using manual shifts. [Dmitry]
* Don't use integer as a pointer value. [Dmitry]
* Allow it to default to of_mbox_index_xlate. [Dmitry]
* Use devm_of_iomap. [Dmitry]
* Use module_platform_driver instead of module init/exit. [Dmitry]
* Get channel number using mailbox core (like other drivers) and
  further simplify the driver by dropping setup_mbox func.

[1]: https://lore.kernel.org/lkml/[e-mail]/#r

Other relevant Links:
https://lore.kernel.org/lkml/[e-mail]/

Sibi Sankar (5):
  dt-bindings: mailbox: qcom: Add CPUCP mailbox controller bindings
  mailbox: Add support for QTI CPUCP mailbox controller
  arm64: dts: qcom: x1e80100: Resize GIC Redistributor register region
  arm64: dts: qcom: x1e80100: Add cpucp mailbox and sram nodes
  arm64: dts: qcom: x1e80100: Enable cpufreq

 .../bindings/mailbox/qcom,cpucp-mbox.yaml     |  49 +++++
 arch/arm64/boot/dts/qcom/x1e80100.dtsi        |  91 ++++++---
 drivers/mailbox/Kconfig                       |   8 +
 drivers/mailbox/Makefile                      |   2 +
 drivers/mailbox/qcom-cpucp-mbox.c             | 179 ++++++++++++++++++
 5 files changed, 304 insertions(+), 25 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mailbox/qcom,cpucp-mbox.yaml
 create mode 100644 drivers/mailbox/qcom-cpucp-mbox.c