Hi Stephen, Sudeep, Cristian
On Tue, Aug 12, 2025 at 08:17:04PM +0800, Peng Fan wrote:
>Since the assigned-clock-sscs property [1] has been accepted into the device
>tree schema, we can now support it in the Linux clock driver. Therefore,
>I’ve picked up the previously submitted work [2] titled “clk: Support
>spread spectrum and use it in clk-pll144x and clk-scmi.”
>As more than six months have passed since [2] was posted, I’m treating this
>patchset as a new submission rather than a v3.
>
>- Introduce clk_set_spread_spectrum to set the parameters for enabling
> spread spectrum of a clock.
>- Parse 'assigned-clock-sscs' and configure it by default before using the
> clock. This property is parsed before parsing clock rate.
>- Enable this feature for clk-scmi on i.MX95.
>
>Because SCMI spec will not include spread spectrum as a standard
>extension, we still need to use NXP i.MX OEM extension.
I only got a comment from Dan until now, before I post V2, I would like
to see if CLK and SCMI maintainer's have any comments. Or I need to wait
a bit more time, please just drop me a message.
Thanks,
Peng
>
>[1] https://github.com/devicetree-org/dt-schema/pull/154
>[2] https://lore.kernel.org/all/20250205-clk-ssc-v2-0-fa73083caa92@nxp.com/
>
>Signed-off-by: Peng Fan <peng.fan@nxp.com>
>---
>Peng Fan (3):
> clk: Introduce clk_hw_set_spread_spectrum
> clk: conf: Support assigned-clock-sscs
> clk: scmi: Support Spread Spectrum for NXP i.MX95
>
> drivers/clk/clk-conf.c | 70 +++++++++++++++++++++++++++++++++++++++++++
> drivers/clk/clk-scmi.c | 64 ++++++++++++++++++++++++++++++++++++---
> drivers/clk/clk.c | 32 ++++++++++++++++++++
> include/linux/clk-provider.h | 29 ++++++++++++++++++
> include/linux/scmi_protocol.h | 5 ++++
> 5 files changed, 196 insertions(+), 4 deletions(-)
>---
>base-commit: b1549501188cc9eba732c25b033df7a53ccc341f
>change-id: 20250812-clk-ssc-version1-acf6f6efbd96
>
>Best regards,
>--
>Peng Fan <peng.fan@nxp.com>
>