Re: [PATCH 3/3] cpufreq: imx-sc: add i.mx system controller cpufreq support

[Viresh Kumar]

On 13-02-19, 03:09, Anson Huang wrote:
> On NXP's i.MX SoCs with system controller inside, CPU frequency
> scaling can ONLY be done by system controller firmware, and it
> can ONLY be requested from secure mode, so Linux cpufreq driver has
> to call ARM SMC to trap to ARM-Trusted-Firmware to request system
> controller firmware to do CPU frequency scaling.
> 
> This patch adds i.MX system controller cpufreq driver support,
> when doing CPU frequency scaling, cpufreq driver will do ARM SMC
> call and trap to ARM-Trusted-Firmware, then SIP(silicon provider)
> service will communicate with system controller for CPU frequenct
> scaling.
> 
> Signed-off-by: Anson Huang <Anson.Huang@xxxxxxx>
> ---
>  drivers/cpufreq/Kconfig.arm      |   9 ++
>  drivers/cpufreq/Makefile         |   1 +
>  drivers/cpufreq/imx-sc-cpufreq.c | 183 +++++++++++++++++++++++++++++++++++++++
>  3 files changed, 193 insertions(+)
>  create mode 100644 drivers/cpufreq/imx-sc-cpufreq.c

Why can't you use cpufreq-dt driver like everyone else ?

-- 
viresh